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Sample records for cms experimental area

  1. 27 January 2011 - Mitglieder des Stiftungsrates Academia Engelberg, Switzerland in CMS surface and underground experimental area with Head of International Relations F. Pauss and ETHZ/CMS Physicist G. Dissertori.

    CERN Multimedia

    Michael Hoch

    2011-01-01

    27 January 2011 - Mitglieder des Stiftungsrates Academia Engelberg, Switzerland in CMS surface and underground experimental area with Head of International Relations F. Pauss and ETHZ/CMS Physicist G. Dissertori.

  2. 27 September 2013 -Lithuanian Minister of Culture Š. Birutis in the LHC tunnel with International Relations Adviser T. Kurtyka and visiting CMS experimental area with Deputy Spokesperson T. Camporesi. Also present: V. Rapsevicius, CMS Collaboration.

    CERN Multimedia

    Laurent Egli

    2013-01-01

    27 September 2013 -Lithuanian Minister of Culture Š. Birutis in the LHC tunnel with International Relations Adviser T. Kurtyka and visiting CMS experimental area with Deputy Spokesperson T. Camporesi. Also present: V. Rapsevicius, CMS Collaboration.

  3. 1st February 2011-CERN Cultural Board for Engaging with the Arts, visiting CMS experimental area and LHC Tunnel at Point 5

    CERN Multimedia

    Michael Hoch

    2011-01-01

    Photo 1-4: Visit to CMS Control Room with G. Tonelli,CMS Collaboration Spokesperson Photo 5-9,16-20:CMS experimental area Photo 10-15:LHC Tunnel at Point 5 Photo 21:F. Madlener,Director of IRCAM Paris+S. Dorny,Director-General Lyon Opera House+C. Bollman,Art by Genève+M. Doser,AEgIS Collaboration Spokesperson,Former Physics Department Deputy Head+A. Koek,International Arts Development+G. Tonelli+M. Monje Cano,Arts Development Assistant (part-time work experience)+B. Ruf,Director of Kunsthalle Zürich

  4. Digging the CMS experimental cavern

    CERN Multimedia

    Laurent Guiraud

    2001-01-01

    The huge CMS experimental cavern is located 100 m underground and has two access shafts through which the experiment's components will be lowered. Initially assembled on the surface, each part of the 12 500 tonne machine must be lowered individually with very little clearance.

  5. Excavating the CMS experimental cavern

    CERN Document Server

    Laurent Guiraud

    2000-01-01

    Diggers work 100 m underground to remove rock from the huge cavern that will soon be the site for the CMS experiment at CERN. Workers travel down the shaft into the cavern in an elevator maneuvered by a crane, equipment must also be lowered in this way. When the cavern is completed, the 12 500 tonne CMS experiment will then be lowered piece by piece, as no crane on Earth will be able to carry the experiment's full weight.

  6. 4 July 2013- European Commission DG CONNECT Director-General R. Madelin, signing the guest book with CERN Director-General R. Heuer and visiting CMS experimental area with Collaboration Deputy Spokesperson J. Varela.

    CERN Multimedia

    Maximilien Brice

    2013-01-01

    4 July 2013- European Commission DG CONNECT Director-General R. Madelin, signing the guest book with CERN Director-General R. Heuer and visiting CMS experimental area with Collaboration Deputy Spokesperson J. Varela.

  7. 4th February 2011- Polish Ambassador to the United Nations Office R. A. Henczel visiting CMS control room and underground experimental area with his daughter, guided by Collaboration Spokesperson G. Tonelli.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    4th February 2011- Polish Ambassador to the United Nations Office R. A. Henczel visiting CMS control room and underground experimental area with his daughter, guided by Collaboration Spokesperson G. Tonelli.

  8. 28 June 2012 - Members of the European Brain Council led by President Mary Baker visiting the LHC tunnel at Point 5 with Technology Department Group Leader L. Bottura and CMS experimental area with Run Coordinator M. Chamizo-Llatas.

    CERN Multimedia

    Jean-Claude Gadmer

    2012-01-01

    28 June 2012 - Members of the European Brain Council led by President Mary Baker visiting the LHC tunnel at Point 5 with Technology Department Group Leader L. Bottura and CMS experimental area with Run Coordinator M. Chamizo-Llatas.

  9. 27 February 2012- Thai Minister of Science and Technology P. Suraswadi with International Relations Adviser E. Tsesmelis and CMS Collaboration Former Deputy Spokesperson A. De Roeck signing the guest book in the 6th floor conference room, building 60 and visiting CMS underground experimental area at LHC Point 5.

    CERN Multimedia

    Maximilien Brice

    2012-01-01

    27 February 2012- Thai Minister of Science and Technology P. Suraswadi with International Relations Adviser E. Tsesmelis and CMS Collaboration Former Deputy Spokesperson A. De Roeck signing the guest book in the 6th floor conference room, building 60 and visiting CMS underground experimental area at LHC Point 5.

  10. 30 January 2012 - Ecuadorian Ambassador Gallegos Chiriboga, Permanent Representative to the United Nations Office and other International Organisations at Geneva and San Francisco de Quito University Vice Chancellor C. Montùfar visiting CMS surface facilities and underground experimental area with CMS Collaboration L. Sulak and Collaboration Deputy Spokesperson T. Camporesi, throughout accompanied by Head of International Relations F. Pauss.

    CERN Multimedia

    Michael Hoch

    2012-01-01

    30 January 2012 - Ecuadorian Ambassador Gallegos Chiriboga, Permanent Representative to the United Nations Office and other International Organisations at Geneva and San Francisco de Quito University Vice Chancellor C. Montùfar visiting CMS surface facilities and underground experimental area with CMS Collaboration L. Sulak and Collaboration Deputy Spokesperson T. Camporesi, throughout accompanied by Head of International Relations F. Pauss.

  11. 15 June 2009 - President of the Republic of Mozambique A. Guebuza visiting CMS experimental area with Non Member-State Relations Adviser J. Ellis, Collaboration Spokesperson T. Virdee and Ambassador to Switzerland and Permenant Representative of the Republic of Mozambique to the United Nations Office and the World Trade Organization in Geneva F. V. Vehlo Rodrigues.

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    Tirage 1-3:H.E. A. Guebuza with Adviser for Non-Member States, J. Ellis and CMS Spokesperson, T. Virdee in CMS experimental area Tirage 4:H.E. A. Guebuza with CERN Director-General, R. Heuer Tirage 5-8: Presentation of CERN's activities by R. Heuer Tirage 9-12:H.E. A. Guebuza with Coordinator for External Relations,F. Pauss and R. Heuer Tirage 13-30:visiting CMS underground experimental area

  12. 16 March 2009 - HRH Princess Maha Chakri Sirindhorn, Kingdom of Thailand, visiting CMS experimental area and LHC tunnel with Coordinator for external relations F. Pauss and Collaboration Spokesperson T. Virdee.

    CERN Document Server

    Maximilien Brice

    2009-01-01

    Photo 1: Relations with Non-Member State E. Tsesmelis, CMS Collaboration Spokesperson T. Virdee, HRH Princess Maha Chakri Sirindhorn and Coordinator for External relations F. Pauss, in CMS experimental area. Photo 2-12: Arrival of HRH at building 160: Posy presented to HRH by E. and F. Breedon; Welcome line: Director-General R. Heuer who introduces S. Bertolucci, F. Pauss, E. Tsesmelis, A. de Roeck, R. Breedon and Protocol Officer W. Korda. Photo 13-26:Presentation by Director-General R. Heuer and Head of Education R. Landua. Photo 27-30: Welcome at CMS by Spokesperson T. Virdee Photo 31-43: LHC tunnel visit Photo 44 - 60: CMS underground area visit Photo 61-63: HRH signs the guest book in the SCX5 conference room Photo 64-69: Signature of an expression of interest between SLRI and CMS Photo 75-88: Final discussion with Coordinator for External relation F. Pauss and Director-General R. Heuer.

  13. 18 December 2012 -Portuguese President of FCT M. Seabra visiting the Computing Centre with IT Department Head F. Hemmer, ATLAS experimental area with Collaboration Spokesperson F. Gianotti and A. Henriques Correia, in the LHC tunnel at Point 2 and CMS experimental area with Deputy Spokesperson J. Varela, signing an administrative agreement with Director-General R. Heuer; LIP President J. M. Gago and Delegate to CERN Council G. Barreia present.

    CERN Multimedia

    Samuel Morier-Genoud

    2012-01-01

    18 December 2012 -Portuguese President of FCT M. Seabra visiting the Computing Centre with IT Department Head F. Hemmer, ATLAS experimental area with Collaboration Spokesperson F. Gianotti and A. Henriques Correia, in the LHC tunnel at Point 2 and CMS experimental area with Deputy Spokesperson J. Varela, signing an administrative agreement with Director-General R. Heuer; LIP President J. M. Gago and Delegate to CERN Council G. Barreia present.

  14. 28 June 2012 - Ambassador I. Piperkov, Permanent Representative of Bulgaria to the United Nations Office and other international organisations in Geneva and Spouse visiting CMS experimental area with Collaboration Deputy Spokesperson T. Camporesi and CERN Control Centre with M. Benedikt.Senior physicist L. Litov accompanies the delegation throughout.

    CERN Multimedia

    Jean-Claude Gadmer

    2012-01-01

    28 June 2012 - Ambassador I. Piperkov, Permanent Representative of Bulgaria to the United Nations Office and other international organisations in Geneva and Spouse visiting CMS experimental area with Collaboration Deputy Spokesperson T. Camporesi and CERN Control Centre with M. Benedikt.Senior physicist L. Litov accompanies the delegation throughout.

  15. 18 January 2011 - Ing. Vittorio Malacalza, ASG Superconductors S.p.A, Italy in the LHC superconducting magnet test hall with Deputy Department Head L. Rossi, in the LHC tunnel at Point 5 and CMS experimental area with Spokesperson G. Tonelli.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    18 January 2011 - Ing. Vittorio Malacalza, ASG Superconductors S.p.A, Italy in the LHC superconducting magnet test hall with Deputy Department Head L. Rossi, in the LHC tunnel at Point 5 and CMS experimental area with Spokesperson G. Tonelli.

  16. 10 January 2011 - Former Minister of Science and Technology Honorary Member of the National Academy of Engineering of Korea J.-U.SEO in the CMS underground experimental area with Deputy Spokesperson J. Incandela, Former Adviser D. Blechschmidt and Adviser R. Voss.

    CERN Multimedia

    Maximilien brice

    2011-01-01

    10 January 2011 - Former Minister of Science and Technology Honorary Member of the National Academy of Engineering of Korea J.-U.SEO in the CMS underground experimental area with Deputy Spokesperson J. Incandela, Former Adviser D. Blechschmidt and Adviser R. Voss.

  17. 9th January 2012 - Indonesian Extraordinary and Plenipotentiary Ambassador Triansyah Djani to to the United Nations, WTO and other International Organisations in Geneva signing the guest book with Head of International Relations F. Pauss and Adviser E. Tsesmelis, visiting the LHC tunnel at Point 5 and CMS underground experimental area with Collaboration Spokesperson J. Incandela.

    CERN Document Server

    Estelle Spirig

    2012-01-01

    9th January 2012 - Indonesian Extraordinary and Plenipotentiary Ambassador Triansyah Djani to to the United Nations, WTO and other International Organisations in Geneva signing the guest book with Head of International Relations F. Pauss and Adviser E. Tsesmelis, visiting the LHC tunnel at Point 5 and CMS underground experimental area with Collaboration Spokesperson J. Incandela.

  18. Wide area network access to CMS data using the Lustre{sup TM} filesystem

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez, J L; Brody, T [Department of Physics, Florida International University, Miami, FL 33199 (United States); Avery, P; Bourilkov, D; Fu, Y; Kim, B; Wu, Y [Department of Physics, Florida University of Florida, Gainesville, FL 32611 (United States); Prescott, C [High Performance Computing Center University of Florida, Gainesville, FL 32611 (United States)

    2010-04-01

    In this paper, we explore the use of the Lustre{sup TM} cluster filesystem over the wide area network to access Compact Muon Solenoid (CMS) data stored on physical devices located hundreds of kilometres away. We describe the experimental testbed and report on the I/O performance of applications writing and reading data on the distributed Lustre{sup TM} filesystem established across the WAN. We compare the I/O performance of a CMS application to the performance obtained with IOzone, a standard benchmark tool. We then examine the I/O performance of the CMS application running multiple processes on a single server. And compare the Lustre results to results obtained on data stored on local filesystems. Our measurements reveal that the IOzone benchmark tool, accessing data sequentially, can saturate the Gbps network link that connects our Lustre client in Miami Florida to the Lustre storage located in Gainesville, Florida. We also find that the I/O rates of the CMS application is significantly less than what can be obtained with IOzone for sequential access to data.

  19. Wide area network access to CMS data using the LustreTM filesystem

    Science.gov (United States)

    Rodriguez, J. L.; Avery, P.; Brody, T.; Bourilkov, D.; Fu, Y.; Kim, B.; Prescott, C.; Wu, Y.

    2010-04-01

    In this paper, we explore the use of the LustreTM cluster filesystem over the wide area network to access Compact Muon Solenoid (CMS) data stored on physical devices located hundreds of kilometres away. We describe the experimental testbed and report on the I/O performance of applications writing and reading data on the distributed LustreTM filesystem established across the WAN. We compare the I/O performance of a CMS application to the performance obtained with IOzone, a standard benchmark tool. We then examine the I/O performance of the CMS application running multiple processes on a single server. And compare the Lustre results to results obtained on data stored on local filesystems. Our measurements reveal that the IOzone benchmark tool, accessing data sequentially, can saturate the Gbps network link that connects our Lustre client in Miami Florida to the Lustre storage located in Gainesville, Florida. We also find that the I/O rates of the CMS application is significantly less than what can be obtained with IOzone for sequential access to data.

  20. 11 March 2009 - Italian Minister of Education, University and Research M. Gelmini, visiting ATLAS and CMS underground experimental areas and LHC tunnel with Director for Research and Scientific Computing S. Bertolucci. Signature of the guest book with CERN Director-General R. Heuer and S. Bertolucci at CMS Point 5.

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    Members of the Ministerial delegation: Cons. Amb. Sebastiano FULCI, Consigliere Diplomatico Dott.ssa Elisa GREGORINI, Segretario Particolare del Ministro Dott. Massimo ZENNARO, Responsabile rapporti con la stampa Prof. Roberto PETRONZIO, Presidente dell’INFN (Istituto Nazionale di Fisica Nucleare) Dott. Luciano CRISCUOLI, Direttore Generale della Ricerca, MIUR Dott. Andrea MARINONI, Consulente scientifico del Ministro CERN delegation present throughout the programme: Prof. Sergio Bertolucci, Director for Research and Scientific Computing Prof. Fabiola Gianotti, ATLAS Collaboration Spokesperson Prof. Paolo Giubellino, ALICE Deputy Spokesperson, Universita & INFN, Torino Prof. Guido Tonelli, CMS Collaboration Deputy Spokesperson, INFN Pisa Dr Monica Pepe-Altarelli, LHCb Collaboration CERN Team Leader Guests in the ATLAS exhibition area: Dr Marcello Givoletti\tPresident of CAEN Dr Davide Malacalza\tPresident of ASG Ansaldo Superconductors and users: Prof. Clara Matteuzzi, LHCb Collaboration, Universita' d...

  1. 10th March 2009 - signature of the guest book by Universiteit Antwerpen Rector A. Verschoren (HI-0903047-01)and by Vrije Universiteit Brussel Rector P. De Knop (HI-0903047-02), with Director for Research and Scientific Computing S. Bertolucci; visit CMS experimental area and LHC tunnel at Point 5 with Collaboration Deputy Spokesperson G. Tonelli and CMS User W. Van Doninck.

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    Delegation members: L. Wijns, Vrije Universiteit Brussel Vice-Rector Research JP. Timmermans, Universiteit Antwerpen President Research J. Paredaens, Universiteit Antwerpen Dean of the Faculty of Science CMS Collaboration participants from Vrije Universiteit Brussel: J.D’Hondt, S. Tavernier, W.Van Doninck CMS Collaboration participants from Universiteit Antwerpen: E. De Wolf, P. Pierre Van Mechelen, A. De Roeck, W. Beaumont

  2. Experimental transmission of cardiomyopathy syndrome (CMS) in Atlantic salmon Salmo salar.

    Science.gov (United States)

    Fritsvold, C; Kongtorp, R T; Taksdal, T; Ørpetveit, I; Heum, M; Poppe, T T

    2009-12-03

    Cardiomyopathy syndrome (CMS) is a disease of unknown aetiology, having significant economic impact as it primarily affects large, farmed Atlantic salmon Salmo salar L. in seawater, close to harvest. In the present study, we have demonstrated that CMS is a transmissible disease under experimental conditions. Histopathological lesions consistent with CMS were induced in Atlantic salmon post-smolts after injection of tissue homogenate from farmed fish diagnosed with CMS. Six weeks post-injection (p.i.), experimental fish started developing focal to multi-focal lesions in the atrial endo- and myocardium, with subsequent progression to the ventricle. This proceeded into severe endocarditis and subsequent myocarditis with mononuclear cell infiltration of the atrium and, to a lesser degree, the spongy layer of the ventricle. These lesions were consistent with histopathological findings in field outbreaks of CMS. From Week 33 p.i., lesions also appeared in the compact myocardium, with focal epicarditis adjacent to focal myocardial lesions. In conclusion, these results indicate that CMS has an infectious aetiology and should be treated as a potentially contagious disease.

  3. 2 September 2009 - H.S.H. Prince Albert II of Monaco (second from right) visiting CMS underground experimental area with, from left to right, Ambassador R. Fillon, Collaboration Spokesperson T. Virdee and CERN Director-General R. Heuer.

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    Tirage 1-28:caverne expérimentale CMS avec le Porte-parole de la Collaboration T. Virdee Tirage 29-42:CCC avec le Chef du Département Faisceaux(BE) P. Collier et Département Faisceaux, groupe opérations, LHC Ingénieur Responsable L. Ponce.

  4. 26 April 2012 - Extraordinary and plenipotentiary Ambassador A. Dékány, Permanent Representative of the Republic of Hungary to the United Nations Office and other international organisations at Geneva, signing the guest book with CERN Director-General R. Heuer; visiting the LHC tunnel at Point 5 and CMS experimental area and surface building with Collaboration Deputy Spokespersom T. Camporesi; accompanied by M. Bajko, Technology Department. International Relations Office Adviser R. Voss also present.

    CERN Multimedia

    Jean-claude Gadmer

    2012-01-01

    26 April 2012 - Extraordinary and plenipotentiary Ambassador A. Dékány, Permanent Representative of the Republic of Hungary to the United Nations Office and other international organisations at Geneva, signing the guest book with CERN Director-General R. Heuer; visiting the LHC tunnel at Point 5 and CMS experimental area and surface building with Collaboration Deputy Spokespersom T. Camporesi; accompanied by M. Bajko, Technology Department. International Relations Office Adviser R. Voss also present.

  5. 6 February 2012 - Supreme Audit Institutions from Norway, Poland, Spain and Switzerland visiting the LHC tunnel at Point 5, CMS underground experimental area, CERN Control Centre and LHC superconducting magnet test hall. Delegations are throughout accompanied by Swiss P. Jenni, Polish T. Kurtyka, Spanish J. Salicio, Norwegian S. Stapnes and International Relations Adviser R. Voss. (Riksrevisjonen, Oslo; Tribunal de Cuentas , Madrid; the Court of Audit of Switzerland and Najwyzsza Izba Kontroli, Varsaw)

    CERN Multimedia

    Jean-Claude Gadmer

    2012-01-01

    6 February 2012 - Supreme Audit Institutions from Norway, Poland, Spain and Switzerland visiting the LHC tunnel at Point 5, CMS underground experimental area, CERN Control Centre and LHC superconducting magnet test hall. Delegations are throughout accompanied by Swiss P. Jenni, Polish T. Kurtyka, Spanish J. Salicio, Norwegian S. Stapnes and International Relations Adviser R. Voss. (Riksrevisjonen, Oslo; Tribunal de Cuentas , Madrid; the Court of Audit of Switzerland and Najwyzsza Izba Kontroli, Varsaw)

  6. 9 February 2012 - Permanent Representative of the Kingdom of Spain to the United Nations Office at Geneva and other International Organisations, Ambassador A. Santos Maraver signing the guest book with CERN Director-General; in the CERN Control Centre with N. Catalan; visiting the LHC tunnel at Point 5 and CMS underground experimental area with Collaboration Spokesperson J. Incandela; throughout accompanied by Adviser J. Salicio Diez and Former Physics Deputy Department Head L. Alvarez Gaumé.

    CERN Multimedia

    Visual Media Office

    2012-01-01

    9 February 2012 - Permanent Representative of the Kingdom of Spain to the United Nations Office at Geneva and other International Organisations, Ambassador A. Santos Maraver signing the guest book with CERN Director-General; in the CERN Control Centre with N. Catalan; visiting the LHC tunnel at Point 5 and CMS underground experimental area with Collaboration Spokesperson J. Incandela; throughout accompanied by Adviser J. Salicio Diez and Former Physics Deputy Department Head L. Alvarez Gaumé.

  7. 18 September 2012 - PD Dr. med. Andreas Trojan Researcher, University of Zürich and Mr Marc Forster Independant Swiss Movie Director Switzerland visiting the CMS underground area with Head of international Relations F. Pauss and CMS Collaboration Z. Szillasi.

    CERN Multimedia

    Jean-Claude Gadmer

    2012-01-01

    18 September 2012 - PD Dr. med. Andreas Trojan Researcher, University of Zürich and Mr Marc Forster Independant Swiss Movie Director Switzerland visiting the CMS underground area with Head of international Relations F. Pauss and CMS Collaboration Z. Szillasi.

  8. Recent experimental results and developments on the resistive plate chambers for the CMS experiment

    CERN Document Server

    Altieri, S; Bruno, G; Guida, R; Merlo, M; Ratti, S P; Riccardi, C; Torre, P; Vitulo, P; Abbrescia, M; Colaleo, A; Iaselli, Giuseppe; Loddo, F; Maggi, M; Marangelli, B; Natali, S; Nuzzo, S; Pugliese, G; Ranieri, A; Romano, F

    2001-01-01

    Resistive plate chambers (RPC) have been chosen as dedicated trigger detectors for the CMS experiment at the LHC. The expected severe operating conditions have required an intense research and development activity on these detectors over the past years. Experimental results on overall performance of large chambers, rate capability, ageing and photon sensitivity are reviewed. In all of these tests the detector has proven to achieve good enough performance for successful use at the LHC. (6 refs).

  9. The supermodule insertion tool of the CMS electromagnetic calorimeter is leaving to the experimental hall located at P5.

    CERN Multimedia

    2006-01-01

    The supermodule insertion tool of the CMS electromagnetic calorimeter is leaving to the experimental hall located at P5. A successful test has been performed with a real supermodule, visible as a silver-coloured box on the last picture.

  10. Secure wide area network access to CMS analysis data using the Lustre filesystem

    Science.gov (United States)

    Bourilkov, D.; Avery, P.; Cheng, M.; Fu, Y.; Kim, B.; Palencia, J.; Budden, R.; Benninger, K.; Rodriquez, J. L.; Dilascio, J.; Dykstra, D.; Seenu, N.

    2012-12-01

    This paper reports the design and implementation of a secure, wide area network (WAN), distributed filesystem by the ExTENCI project (Extending Science Through Enhanced National CyberInfrastructure), based on the Lustre filesystem. The system is used for remote access to analysis data from the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC), and from the Lattice Quantum ChromoDynamics (LQCD) project. Security is provided by Kerberos authentication and authorization with additional fine grained control based on Lustre ACLs (Access Control List) and quotas. We investigate the impact of using various Kerberos security flavors on the I/O rates of CMS applications on client nodes reading and writing data to the Lustre filesystem, and on LQCD benchmarks. The clients can be real or virtual nodes. We are investigating additional options for user authentication based on user certificates.

  11. from left to right : Mr Michel Della Negra (Last spokeperson of CMS), Prof. Tejinder ("Jim") Virdee (actual spokeperson of CMS), Mr Robert Aymar (CERN Director General) and Mr Sigurd Lettow (Chief Financial Officer of CERN) assist to the Lowering of the final element (YE-1) of the Compact Muon Solenoid (CMS) detector into its underground experimental cavern.

    CERN Multimedia

    Maximilien Brice

    2008-01-01

    from left to right : Mr Michel Della Negra (Last spokeperson of CMS), Prof. Tejinder ("Jim") Virdee (actual spokeperson of CMS), Mr Robert Aymar (CERN Director General) and Mr Sigurd Lettow (Chief Financial Officer of CERN) assist to the Lowering of the final element (YE-1) of the Compact Muon Solenoid (CMS) detector into its underground experimental cavern.

  12. Quality control for the first large areas of triple GEM chambers for the CMS endcaps

    CERN Document Server

    Tytgat, Michael

    2015-01-01

    The CMS GEM collaboration plans to equip the very forward muon system with triple GEM detectors that can withstand the environment of the high-luminosity LHC. This project is at the final stages of R and D and moving to production. An unprecedented large area of several 100m2 are to be instrumented with GEM detectors which will be produced in six different sites around the world. A common construction and quality control procedure is required to ensure the performance of each detector. The quality control steps will include optical inspection, cleaning and baking of all materials and parts used to build the detector, leakage current tests of the GEM foils, high voltage tests, gas leak tests of the chambers and monitoring pressure drop vs. time, gain calibration to know the optimal operation region of the detector, gain uniformity tests, and studying the efficiency, noise and tracking performance of the detectors in a cosmic stand using scintillators.

  13. 22 May 2009 - HRH the Duke of Kent, United Kingdom of Great Britain and Northern Ireland, visiting CMS underground area and CERN Control Center with Director for Accelerators and Technology S. Myers and Senior Physicist and STFC Board Member J. Ellis.

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    Tirage 1 to 11:Signature of the guest book with the Director-General, R. Heuer Tirage 12 to 25:CMS underground experimental area with Spokesperson, T. Virdee Tirage 26 to 35:CCC with P. Collier and D. Nisbet

  14. Overview of large area triple-GEM detectors for the CMS forward muon upgrade

    Science.gov (United States)

    Abbaneo, D.; Abbas, M.; Abbrescia, M.; Abi Akl, M.; Aboamer, O.; Acosta, D.; Ahmad, A.; Ahmed, W.; Aleksandrov, A.; Altieri, P.; Asawatangtrakuldee, C.; Aspell, P.; Assran, Y.; Awan, I.; Bally, S.; Ban, Y.; Banerjee, S.; Barashko, V.; Barria, P.; Bencze, G.; Beni, N.; Benussi, L.; Bhopatkar, V.; Bianco, S.; Bos, J.; Bouhali, O.; Braghieri, A.; Braibant, S.; Buontempo, S.; Calabria, C.; Caponero, M.; Caputo, C.; Cassese, F.; Castaneda, A.; Cauwenbergh, S.; Cavallo, F. R.; Celik, A.; Choi, M.; Choi, S.; Christiansen, J.; Cimmino, A.; Colafranceschi, S.; Colaleo, A.; Garcia, A. Conde; Czellar, S.; Dabrowski, M. M.; De Lentdecker, G.; De Oliveira, R.; de Robertis, G.; Dildick, S.; Dorney, B.; Endroczi, G.; Errico, F.; Fenyvesi, A.; Ferry, S.; Furic, I.; Giacomelli, P.; Gilmore, J.; Golovtsov, V.; Guiducci, L.; Guilloux, F.; Gutierrez, A.; Hadjiiska, R. M.; Hauser, J.; Hoepfner, K.; Hohlmann, M.; Hoorani, H.; Iaydjiev, P.; Jeng, Y. G.; Kamon, T.; Karchin, P.; Korytov, A.; Krutelyov, S.; Kumar, A.; Kim, H.; Lee, J.; Lenzi, T.; Litov, L.; Loddo, F.; Madorsky, A.; Maerschalk, T.; Maggi, M.; Magnani, A.; Mal, P. K.; Mandal, K.; Marchioro, A.; Marinov, A.; Majumdar, N.; Merlin, J. A.; Mitselmakher, G.; Mohanty, A. K.; Mohapatra, A.; Molnar, J.; Muhammad, S.; Mukhopadhyay, S.; Naimuddin, M.; Nuzzo, S.; Oliveri, E.; Pant, L. M.; Paolucci, P.; Park, I.; Passeggio, G.; Pavlov, B.; Philipps, B.; Piccolo, D.; Postema, H.; Puig Baranac, A.; Radi, A.; Radogna, R.; Raffone, G.; Ranieri, A.; Rashevski, G.; Riccardi, C.; Rodozov, M.; Rodrigues, A.; Ropelewski, L.; RoyChowdhury, S.; Ryu, G.; Ryu, M. S.; Safonov, A.; Salva, S.; Saviano, G.; Sharma, A.; Sharma, A.; Sharma, R.; Shah, A. H.; Shopova, M.; Sturdy, J.; Sultanov, G.; Swain, S. K.; Szillasi, Z.; Talvitie, J.; Tatarinov, A.; Tuuva, T.; Tytgat, M.; Vai, I.; Stenis, M. Van; Venditti, R.; Verhagen, E.; Verwilligen, P.; Vitulo, P.; Volkov, S.; Vorobyev, A.; Wang, D.; Wang, M.; Yang, U.; Yang, Y.; Yonamine, R.; Zaganidis, N.; Zenoni, F.; Zhang, A.

    2017-02-01

    In order to cope with the harsh environment expected from the high luminosity LHC, the CMS forward muon system requires an upgrade. The two main challenges expected in this environment are an increase in the trigger rate and increased background radiation leading to a potential degradation of the particle ID performance. Additionally, upgrades to other subdetectors of CMS allow for extended coverage for particle tracking, and adding muon system coverage to this region will further enhance the performance of CMS. Following an extensive R&D program, CMS has identified triple-foil gas electron multiplier (GEM) detectors as a solution for the first muon station in the region 1.6 R&D is ongoing for additional regions.

  15. 30th August 2010 - Permanent Representative of the People's Republic of China to the United Nations Office at Geneva, Ambassador Y. He visiting the CMS underground experimental area and LHC tunnel with CERN Director-General R. Heuer and Collaboration Spokesperson G. Tonelli.

    CERN Multimedia

    Maximilien Brice

    2010-01-01

    CERN-HI-1008197 01: in the LHC tunnel at Point 5: CMS Collaboaration Spokesperson G. Tonelli, Mrs L. Jianping (Ambassador's spouse), Mrs B. Heuer, Permanent Representative of the People's Republic of China to the United Nations Office at Geneva, Ambassador Y. He, CERN Director-General R. Heuer and Adviser R. Voss; CERN-HI-1008197 57: in front of the CMS experiment at LHC point 5: CMS technical Coordinator A. Ball, Mrs L. Jianping (Ambassador's spouse), Permanent Representative of the People's Republic of China to the United Nations Office at Geneva, Ambassador Y. He; Mrs B. Heuer, CERN Director-General R. Heuer, CMS Collaboaration Spokesperson G. Tonelli and Adviser R. Voss. CERN-HI-1008197 02 - 14: Welcome in front of building 3562 at CMS. Head of International relations F: Pauss gives the introduction talk to the delegation. CERN-HI-1008197 15 - 25: visiting CMS control room at Point 5 with Collaboration Spokesperson G. Tonelli; CERN-HI-1008197 26 - 29: visiting the service cavern in the CMS underground ar...

  16. 3 October 2013 - Ukrainian Vice Prime Minister Ukraine K. I. Gryschenko welcomed by CERN Director-General R. Heuer who introduces Head of International Relations R. Voss; Head of Technology Department F. Bordry; Deputy Head of International Relations E. Tsesmelis; Deputy Legal Counsel M. Wilbers; Adviser for Ukraine T. Kurtyka; Signing of the Agreement between Ukraine and CERN concerning the granting of the status of Associate Member at CERN; in the LHC tunnel at Point 5 and visiting CMS experimental area with CERN Team Leader A. Petrilli.

    CERN Document Server

    Anna Pantelia

    2013-01-01

    3 October 2013 - Ukrainian Vice Prime Minister Ukraine K. I. Gryschenko welcomed by CERN Director-General R. Heuer who introduces Head of International Relations R. Voss; Head of Technology Department F. Bordry; Deputy Head of International Relations E. Tsesmelis; Deputy Legal Counsel M. Wilbers; Adviser for Ukraine T. Kurtyka; Signing of the Agreement between Ukraine and CERN concerning the granting of the status of Associate Member at CERN; in the LHC tunnel at Point 5 and visiting CMS experimental area with CERN Team Leader A. Petrilli.

  17. CMS Factsheet

    CERN Multimedia

    Davis, Siona Ruth

    2016-01-01

    CMS Factsheets: containing facts about the CMS collaboration and detector. Printed copies of the English version are available from the CMS Secretariat. Responsible for translations: English only - E.Gibney (updated 2015)

  18. CMS Factsheet

    CERN Multimedia

    Lapka, Marzena; Rao, Achintya

    2016-01-01

    CMS Factsheets: containing facts about the CMS collaboration and detector. Printed copies of the English version are available from the CMS Secretariat. Responsible for translations: English only - E.Gibney (updated 2015)

  19. Experimental Studies Towards a DC-DC Conversion Powering Scheme for the CMS Silicon Strip Tracker at SLHC

    CERN Document Server

    Klein, Katja; Jussen, Ruediger; Karpinski, Waclaw; Merz, Jennifer; Sammet, J

    2009-01-01

    The upgrade of the CMS silicon tracker for the Super-LHC presents many challenges. The distribution of power to the tracker is considered particularly difficult, as the tracker power consumption is expected to be similar to or higher than today, while the operating voltage will decrease and power cables cannot be exchanged or added. The CMS tracker has adopted parallel powering with DC-DC conversion as the baseline solution to the powering problem. In this paper, experimental studies of such a DC-DC conversion powering scheme are presented, including system test measurements with custom DC-DC converters and current strip tracker structures, studies of the detector susceptibility to conductive noise, and simulations of the effect of novel powering schemes on the strip tracker material budget.

  20. Auger Physicists visit CMS

    CERN Multimedia

    Hoch, Michael

    2012-01-01

    Visit at CERN P5 CMS in the experimental cavern Alan Watson, Auger Spokesperson Emeritus, University of Leeds; Jim Cronin, Nobel Laureate, Auger Spokesperson Emeritus, University of Chicago; Jim Virdee, CMS Former Spokesperson, Imperial College; Jim Matthews, Auger Co-Spokesperson, Louisiana State University

  1. 31 August 2008 - Secretary General of the United Nations Ban Ki-moon visiting CMS experimental underground area and LHC tunnel with CERN Director-General R. Aymar and Collaboration Spokesperson T. Virdee. Director-General of the United Nations Office at Geneva S. Ordzhonikidze also present.

    CERN Document Server

    Maximilien Brice

    2008-01-01

    Also present on the photographs: Guests: Representative of the French Republic O. Laurens-Bernard, Sous Préfet de Gex Deputy Permanent representative C. Guilhou, Permanent Mission of France to the UN CERN: CMS Collaboration Technical Coordinator A. Ball Chief Scientific Officer, Deputy Director-General J. Engelen Group Leader in matter of Safety C. Schaefer LHC engineer in charge L. Ponce

  2. 14th May 2009-CH-Conseil d’Etat d’Argovie et Conseil d’Etat de Genève visiting CMS underground area

    CERN Multimedia

    2009-01-01

    Visit of CMS underground experimental area with CMS Spokesperson, T. Virdee The delegation : Conseillers d’Etat argoviens M. Roland Brogli\tPrésident du Conseil d'Etat Chef du Département des Finances et des Ressources M. Urs Hofmann\tConseiller d'Etat Chef du Département de l'Economie et de l'Intérieur M. Alex Hürzeler\tConseiller d'Etat Chef du Département de la Formation, de la Culture et du Sport Dr Peter Grünenfelder\tChancelier du canton d'Argovie Conseillers d’Etat genevois M. David Hiler\tPrésident du Conseil d’Etat, Chef du Département des finances M. François Longchamps\tVice-président du Conseil d’Etat, Chef du département de la solidarité et de l’emploi M. Laurent Moutinot\tConseiller d'Etat, Chef du département des institutions M. Robert Cramer\tConseiller d'Etat, Chef du département du territoire M. Pierre-François Unger\tConseiller d'Etat, Chef du département de l'économie et de la santé M. Charles Beer\tConseiller d'Etat, Chef du département de l'instruction publique ...

  3. CMS Statistics

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CMS Center for Strategic Planning produces an annual CMS Statistics reference booklet that provides a quick reference for summary information about health...

  4. CMS launches the CMS Times

    CERN Multimedia

    2006-01-01

    In an effort to improve communication, the CMS collaboration has started to produce a weekly online newsletter: the CMS Times. Each edition features articles concerning the status of CMS construction, commissioning and analysis, as well as a basic 'events' calendar. All CMS collaborators will receive the CMS Times, but subscription is open to all. Suggestions and comments are, of course, welcome and can be made by sending mails to: cmstimes@cern.ch. The latest edition can be found at: http://cmsinfo.cern.ch/outreach/CMSTimes.html, or at the main CMS Outreach site: http://cmsinfo.cern.ch/outreach.

  5. CMS DOCUMENTATION

    CERN Multimedia

    CMS TALKS AT MAJOR MEETINGS The agenda and talks from major CMS meetings can now be electronically accessed from the iCMS Web site. The following items can be found on: http://cms.cern.ch/iCMS/ Management- CMS Weeks (Collaboration Meetings), CMS Weeks Agendas The talks presented at the Plenary Sessions. Management - CB - MB - FB Agendas and minutes are accessible to CMS members through their AFS account (ZH). However some linked documents are restricted to the Board Members. FB documents are only accessible to FB members. LHCC The talks presented at the ‘CMS Meetings with LHCC Referees’ are available on request from the PM or MB Country Representative. Annual Reviews The talks presented at the 2007 Annual reviews are posted. CMS DOCUMENTS It is considered useful to establish information on the first employment of CMS doctoral students upon completion of their theses. Therefore it is requested that Ph.D students inform the CMS Secretariat about the nature of employment and ...

  6. CMS DOCUMENTATION

    CERN Multimedia

    CMS TALKS AT MAJOR MEETINGS The agenda and talks from major CMS meetings can now be electronically accessed from the iCMS Web site. The following items can be found on: http://cms.cern.ch/iCMS/ Management- CMS Weeks (Collaboration Meetings), CMS Weeks Agendas The talks presented at the Plenary Sessions. Management - CB - MB - FB Agendas and minutes are accessible to CMS members through their AFS account (ZH). However some linked documents are restricted to the Board Members. FB documents are only accessible to FB members. LHCC The talks presented at the ‘CMS Meetings with LHCC Referees’ are available on request from the PM or MB Country Representative. Annual Reviews The talks presented at the 2007 Annual reviews are posted. CMS DOCUMENTS It is considered useful to establish information on the first employment of CMS doctoral students upon completion of their theses. Therefore it is requested that Ph.D students inform the CMS Secretariat about the nature of em¬pl...

  7. CMS DOCUMENTATION

    CERN Multimedia

    CMS TALKS AT MAJOR MEETINGS The agenda and talks from major CMS meetings can now be electronically accessed from the iCMS Web site. The following items can be found on: http://cms.cern.ch/iCMS/ General - CMS Weeks (Collaboration Meetings), CMS Weeks Agendas The talks presented at the Plenary Sessions. LHC Symposiums Management - CB - MB - FB - FMC Agendas and minutes are accessible to CMS members through their AFS account (ZH). However some linked documents are restricted to the Board Members. FB documents are only accessible to FB members. LHCC The talks presented at the ‘CMS Meetings with LHCC Referees’ are available on request from the PM or MB Country Representative. Annual Reviews The talks presented at the 2006 Annual reviews are posted.   CMS DOCUMENTS It is considered useful to establish information on the first employment of CMS doctoral students upon completion of their theses. Therefore it is requested that Ph.D students inform the CMS Secretariat a...

  8. CMS DOCUMENTATION

    CERN Multimedia

    CMS TALKS AT MAJOR MEETINGS The agenda and talks from major CMS meetings can now be electronically accessed from the iCMS Web site. The following items can be found on: http://cms.cern.ch/iCMS/ General - CMS Weeks (Collaboration Meetings), CMS Weeks Agendas The talks presented at the Plenary Sessions. LHC Symposiums Management - CB - MB - FB - FMC Agendas and minutes are accessible to CMS members through their AFS account (ZH). However some linked documents are restricted to the Board Members. FB documents are only accessible to FB members. LHCC The talks presented at the ‘CMS Meetings with LHCC Referees’ are available on request from the PM or MB Country Representative. Annual Reviews The talks presented at the 2006 Annual reviews are posted. CMS DOCUMENTS It is considered useful to establish information on the first employment of CMS doctoral students upon completion of their theses. Therefore it is requested that Ph.D students inform the CMS Secretariat about the natur...

  9. CMS DOCUMENTATION

    CERN Multimedia

    CMS TALKS AT MAJOR MEETINGS The agenda and talks from major CMS meetings can now be electronically accessed from the iCMS Web site. The following items can be found on: http://cms.cern.ch/iCMS/ General - CMS Weeks (Collaboration Meetings), CMS Weeks Agendas The talks presented at the Plenary Sessions. LHC Symposiums Management - CB - MB - FB - FMC Agendas and minutes are accessible to CMS members through their AFS account (ZH). However some linked documents are restricted to the Board Members. FB documents are only accessible to FB members. LHCC The talks presented at the ‘CMS Meetings with LHCC Referees’ are available on request from the PM or MB Country Representative. Annual Reviews The talks presented at the 2006 Annual reviews are posted. CMS DOCUMENTS It is considered useful to establish information on the first employment of CMS doctoral students upon completion of their theses. Therefore it is requested that Ph.D students inform the CMS Secretariat about the natu...

  10. CMS DOCUMENTATION

    CERN Multimedia

    CMS TALKS AT MAJOR MEETINGS The agenda and talks from major CMS meetings can now be electronically accessed from the iCMS Web site. The following items can be found on: http://cms.cern.ch/iCMS/ General - CMS Weeks (Collaboration Meetings), CMS Weeks Agendas The talks presented at the Plenary Sessions. LHC Symposiums Management - CB - MB - FB - FMC Agendas and minutes are accessible to CMS members through their AFS account (ZH). However some linked documents are restricted to the Board Members. FB documents are only accessible to FB members. LHCC The talks presented at the ‘CMS Meetings with LHCC Referees’ are available on request from the PM or MB Country Representative. Annual Reviews The talks presented at the 2006 Annual reviews are posted. CMS DOCUMENTS It is considered useful to establish information on the first employment of CMS doctoral students upon completion of their theses. Therefore it is requested that Ph.D students inform the CMS Secretariat about the na...

  11. ISABELLE. Volume 3. Experimental areas, large detectors

    Energy Technology Data Exchange (ETDEWEB)

    1981-01-01

    This section presents the papers which resulted from work in the Experimental Areas portion of the Workshop. The immediate task of the group was to address three topics. The topics were dictated by the present state of ISABELLE experimental areas construction, the possibility of a phased ISABELLE and trends in physics and detectors.

  12. CMS DOCUMENTATION

    CERN Multimedia

    CMS TALKS AT MAJOR MEETINGS The agenda and talks from major CMS meetings can now be electronically accessed from the ICMS Web site. The following items can be found on: http://cms.cern.ch/iCMS Management – CMS Weeks (Collaboration Meetings), CMS Weeks Agendas The talks presented at the Plenary Sessions. Management – CB – MB – FB Agendas and minutes are accessible to CMS members through Indico. LHCC The talks presented at the ‘CMS Meetings with LHCC Referees’ are available on request from the PM or MB Country Representative. Annual Reviews The talks presented at the 2008 Annual Reviews are posted in Indico. CMS DOCUMENTS It is considered useful to establish information on the first employment of CMS doctoral student upon completion of their theses.  Therefore it is requested that Ph.D students inform the CMS Secretariat about the nature of employment and name of their first employer. The Notes, Conference Reports and Theses published si...

  13. Construction and Performance of Large-Area Triple-GEM Prototypes for Future Upgrades of the CMS Forward Muon System

    CERN Document Server

    AUTHOR|(CDS)2068936; Marinov, A.; Zaganidis, N.; Ban, Y.; Cai, J.; Teng, H.; Mohapatra, A.; Moulik, T.; Abbrescia, M.; Colaleo, A.; de Robertis, G.; Loddo, F.; Maggi, M.; Nuzzo, S.; Tupputi, S.A.; Benussi, L.; Bianco, S.; Colafranceschi, S.; Piccolo, D.; Raffone, G.; Saviano, G.; Bagliesi, M.G.; Cecchi, R.; Magazzu, G.; Oliveri, E.; Turini, N.; Fruboes, T.; Abbaneo, D.; Armagnaud, C.; Aspell, P.; Bally, S.; Berzano, U.; Bos, J.; Bunkowski, K.; Chatelain, J.P.; Christiansen, J.; Conde Garcia, A.; David, E.; De Oliveira, R.; Duarte Pinto, S.; Ferry, S.; Formenti, F.; Franconi, L.; Marchioro, A.; Mehta, K.; Merlin, J.; Nemallapudi, M.V.; Postema, H.; Rodrigues, A.; Ropelewski, L.; Sharma, A.; Smilkjovic, N.; Villa, M.; Zientek, M.; Gutierrez, A.; Karchin, P.E.; Gnanvo, K.; Hohlmann, M.; Staib, M.J.

    2011-01-01

    At present, part of the forward RPC muon system of the CMS detector at the CERN LHC remains uninstrumented in the high-\\eta region. An international collaboration is investigating the possibility of covering the 1.6 < |\\eta| < 2.4 region of the muon endcaps with large-area triple-GEM detectors. Given their good spatial resolution, high rate capability, and radiation hardness, these micro-pattern gas detectors are an appealing option for simultaneously enhancing muon tracking and triggering capabilities in a future upgrade of the CMS detector. A general overview of this feasibility study will be presented. The design and construction of small (10\\times10 cm2) and full-size trapezoidal (1\\times0.5 m2) triple-GEM prototypes will be described. During detector assembly, different techniques for stretching the GEM foils were tested. Results from measurements with x-rays and from test beam campaigns at the CERN SPS will be shown for the small and large prototypes. Preliminary simulation studies on the expected...

  14. CMS Statistics

    Data.gov (United States)

    U.S. Department of Health & Human Services — This reference provides significant summary information about health expenditures and the Centers for Medicare & Medicaid Services' (CMS) programs. The...

  15. 19 January 2011 - Korean Vice Minister II of Education, Science and Technology K.Chang-Kyung with Adviser R. Voss, Director-General R. Heuer and head of International Relations F. Pauss; in the LHC tunnel at Point 5 and CMS experimental cavern with Collaboration Spokesperson G. Tonelli.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    Korean vice-minister II of education, science and technology, Kim Chang-Kyung, visiting the CMS experimental area at CERN on 19 January. He also had the opportunity to view part of the LHC tunnel, as well as to visit the CERN Control Centre.

  16. Low Energy Antiproton Ring experimental area

    CERN Multimedia

    1991-01-01

    The experimental area at the Low Energy Antiproton Ring (LEAR) is seen. This set up was used to slow down antiprotons which had been produced by colliding a proton beam with a solid target. The experiments in the hall then took antiprotons from LEAR to perform antimatter studies. One such experiment, PS210, produced the world's first antihydrogen atoms.

  17. CMS AWARDS

    CERN Multimedia

    Steven Lowette

    Working under great time pressure towards a common goal in gradual steps can sometimes cause us to forget to take a step back, and celebrate what marvels have been achieved. A general need was felt within CMS to expand the recognition for our young scientists that made outstanding, well recognized and creative contributions to CMS, which served to significantly advance the performance of CMS as a complete and powerful experiment. Therefore, the Collaboration Board endorsed in March 2009 a proposal from the CB Chair and Advisory Group to award each year the newly created "CMS Achievement Award" to fourteen graduate students and postdocs that made exceptional contributions to the Tracker, ECAL, HCAL and Muon subdetectors as well as the TriDAS project, the Commissioning of CMS and the Offline Software and Computing projects. It was also agreed that there was a need to go back in time, and retroactively attribute awards for the years 2007 and 2008 when CMS went from a bare cavern to a detect...

  18. 19 September 2012 - Indonesian Members of Parliament visiting the CMS control room and experimental cavern at Point 5 with Former Deputy Spokesperson A. De Roeck and International Relations Adviser E. Tsesmelis.

    CERN Document Server

    Jean-Claude Gadmer

    2012-01-01

    19 September 2012 - Indonesian Members of Parliament visiting the CMS control room and experimental cavern at Point 5 with Former Deputy Spokesperson A. De Roeck and International Relations Adviser E. Tsesmelis.

  19. Evacuation drill at CMS

    CERN Multimedia

    Niels Dupont-Sagorin and Christoph Schaefer

    2012-01-01

    Training personnel, including evacuation guides and shifters, checking procedures, improving collaboration with the CERN Fire Brigade: the first real-life evacuation drill at CMS took place on Friday 3 February from 12p.m. to 3p.m. in the two caverns located at Point 5 of the LHC.   CERN personnel during the evacuation drill at CMS. Evacuation drills are required by law and have to be organized periodically in all areas of CERN, both above and below ground. The last drill at CMS, which took place in June 2007, revealed some desiderata, most notably the need for a public address system. With this equipment in place, it is now possible to broadcast audio messages from the CMS control room to the underground areas.   The CMS Technical Coordination Team and the GLIMOS have focused particularly on preparing collaborators for emergency situations by providing training and organizing regular safety drills with the HSE Unit and the CERN Fire Brigade. This Friday, the practical traini...

  20. Live CMS

    CERN Document Server

    2017-01-01

    CMS live from Facebook. The Pixel Tracker (or Pixel Detector) is the innermost instrument in the very heart of the CMS apparatus, installed around the LHC beampipe. This is the very point where new particles, such as the Higgs boson, are produced by the energy of the proton proton collisions, and so the Pixel detector receives the largest particle-flux of any sub-component of CMS. The new component is made up of two “parts”: a central barrel region (called BPIX), made of two cylindrical halves, and forward discs on either side of the collision point (FPIX). The new BPIX was manufactured by a consortium of European institutes from Switzerland, Italy and Germany, supported by CERN. The new FPIX was manufactured by 14 institutes in the USA.

  1. CMS overview

    CERN Document Server

    Hong, Byungsik

    2015-01-01

    Most recent CMS data related to the high-density QCD are presented for pp and PbPb collisions at 2.76 TeV and pPb collisions at 5.02 TeV. The PbPb collision is essential to understand collective behavior and the final-state effects for the detailed characteristics of hot, dense partonic matter, whereas the pPb collision provides the critical information on the initial-state effects including the modification of the parton distribution function in cold nuclei. This paper highlights some of recent heavy-ion related results from CMS.

  2. The Latest from CMS

    CERN Multimedia

    2009-01-01

    CMS is on track to be ready for physics one month in advance of the LHC restart. The final installations are being completed and tests are being run to ensure that the experiment is as well prepared as possible to exploit sustained LHC operation throughout 2010. Physics week in Bologna, Italy, was a valuable time for CMS collaborators to discuss preparations for numerous physics analyses, as well as the performance of the detector during the recent data-taking period with cosmics (CRAFT 09). During this five-week exercise, more than 300 million cosmic events were recorded with the magnetic field on. This large data-set is being used to further improve the sub-detector alignment, calibration and performance whilst awaiting p-p collisions. Meanwhile, in the experimental cavern, Wolfram Zeuner, Deputy Technical Coordinator of CMS, reports "We are now very nearly closed up again. We are just doing the final clean-up work and are ready t...

  3. Distributed Analysis in CMS

    CERN Document Server

    Fanfani, Alessandra; Sanches, Jose Afonso; Andreeva, Julia; Bagliesi, Giusepppe; Bauerdick, Lothar; Belforte, Stefano; Bittencourt Sampaio, Patricia; Bloom, Ken; Blumenfeld, Barry; Bonacorsi, Daniele; Brew, Chris; Calloni, Marco; Cesini, Daniele; Cinquilli, Mattia; Codispoti, Giuseppe; D'Hondt, Jorgen; Dong, Liang; Dongiovanni, Danilo; Donvito, Giacinto; Dykstra, David; Edelmann, Erik; Egeland, Ricky; Elmer, Peter; Eulisse, Giulio; Evans, Dave; Fanzago, Federica; Farina, Fabio; Feichtinger, Derek; Fisk, Ian; Flix, Josep; Grandi, Claudio; Guo, Yuyi; Happonen, Kalle; Hernandez, Jose M; Huang, Chih-Hao; Kang, Kejing; Karavakis, Edward; Kasemann, Matthias; Kavka, Carlos; Khan, Akram; Kim, Bockjoo; Klem, Jukka; Koivumaki, Jesper; Kress, Thomas; Kreuzer, Peter; Kurca, Tibor; Kuznetsov, Valentin; Lacaprara, Stefano; Lassila-Perini, Kati; Letts, James; Linden, Tomas; Lueking, Lee; Maes, Joris; Magini, Nicolo; Maier, Gerhild; McBride, Patricia; Metson, Simon; Miccio, Vincenzo; Padhi, Sanjay; Pi, Haifeng; Riahi, Hassen; Riley, Daniel; Rossman, Paul; Saiz, Pablo; Sartirana, Andrea; Sciaba, Andrea; Sekhri, Vijay; Spiga, Daniele; Tuura, Lassi; Vaandering, Eric; Vanelderen, Lukas; Van Mulders, Petra; Vedaee, Aresh; Villella, Ilaria; Wicklund, Eric; Wildish, Tony; Wissing, Christoph; Wurthwein, Frank

    2009-01-01

    The CMS experiment expects to manage several Pbytes of data each year during the LHC programme, distributing them over many computing sites around the world and enabling data access at those centers for analysis. CMS has identified the distributed sites as the primary location for physics analysis to support a wide community with thousands potential users. This represents an unprecedented experimental challenge in terms of the scale of distributed computing resources and number of user. An overview of the computing architecture, the software tools and the distributed infrastructure is reported. Summaries of the experience in establishing efficient and scalable operations to get prepared for CMS distributed analysis are presented, followed by the user experience in their current analysis activities.

  4. CMS Awards

    CERN Multimedia

    2004-01-01

    Ali Mohammad Rafiee receives the CMS Gold Award from Michel Della Negra of CMS. As part of the fifth annual CMS Awards, Iranian contractor HEPCO, located in Arak, an industrial town 200 km west of Tehran, received their Gold Award in a ceremony held on 14 June 2004 (the other award winners were reported in bulletin 13/2004). The Awards are given each year to a small number of the approximately one thousand contractors working on the CMS project. Gold Awards are given for outstanding technical achievement in work carried out for the detector. HEPCO received the Award for the excellent quality of their work in constructing two 25 tonne support tables, two 75 tonne shields (FCS) and eight supporting brackets to lower the HF into the cavern. Welds and machining obtained tolerances that were very difficult in structures of that size. Mr. A. M. Rafiee, the General Manager of the company, acknowledged the benefits of this collaboration, and thanked the efforts and skills of the many staff involved.

  5. CMS Detector Posters

    CERN Multimedia

    2016-01-01

    CMS Detector posters (produced in 2000): CMS installation CMS collaboration From the Big Bang to Stars LHC Magnetic Field Magnet System Trackering System Tracker Electronics Calorimetry Eletromagnetic Calorimeter Hadronic Calorimeter Muon System Muon Detectors Trigger and data aquisition (DAQ) ECAL posters (produced in 2010, FR & EN): CMS ECAL CMS ECAL-Supermodule cooling and mechatronics CMS ECAL-Supermodule assembly

  6. 13th May 2009-Spanish Secretary of State for Research Ministry of Science and Innovation C. Martínez Alonso visiting CMS and ATLAS underground areas with Physics Deputy Department Head L. Alvarez-Gaume.

    CERN Multimedia

    Maximilien Brice; CERN

    2009-01-01

    Tirage 1-3; 7-9:C. Alonso, R. Heuer Tirage 4-6:F. Pauss, R. Heuer, C. Alonso, J. Labastida Tirage 10-11:M. Aguilar Benitez, C. Alonso at CMS Tirage 12-13:the delegation and G. Tonelli, counting room Tirage 14-15,17:the delegation and G. Tonelli, CMS underground area Tirage 16:G. Tonelli, C. Alonso, CMS underground area Tirage 18-20:G. Tonelli, C. Alonso, M. Aguilar Benitez, CMS underground area Tirage 21-28 :C. Alonso, R. Heuer, signing the Guest book Tirage 29-36;38-41:the delegation at ATLAS with P. Jenni Tirage 37:J. Aparicio, C. Parajes, J. Labastida, P. Jenni, C. Alonso, L. Alvarez Gaume Tirage 42-43:the delegation and spanish ATLAS collaborators Tirage 44-46: Meeting with spanish scientists at CERN

  7. Quality Control of the Large-area GEM detectors at Production Sites for the CMS Muon Endcap Upgrade

    Science.gov (United States)

    Rahmani, Mehdi; CMS Collaboration

    2017-01-01

    GEM (Gas Electron Multipliers) detectors will be installed in the high-eta region of the CMS muon system by the year 2019. With precise tracking and fast trigger information, these detectors will significantly improve the CMS muon triggering after the second long shutdown of the LHC. There are six sites, external to CERN, where at total of 160 1-meter long GEM detectors will be produced. We present the detector construction and discuss the critical quality control (QC) procedures implemented for chamber commissioning. Some of the most important QCs discussed are: current leakage tests, gas leak tests, gain measurements, high voltage test and response uniformity test. We discuss the criteria that are used to accept or reject a GEM detector based on the QC results. The production and QC status will be presented as well.

  8. The CMS superconducting solenoid

    CERN Multimedia

    Maximilien Brice

    2004-01-01

    The huge solenoid that will generate the magnetic field for the CMS experiment at the LHC is shown stored in the assembly hall above the experimental cavern. The solenoid is made up of five pieces totaling 12.5 m in length and 6 m in diameter. It weighs 220 tonnes and will produce a 4 T magnetic field, 100 000 times the strength of the Earth's magnetic field, storing enough energy to melt 18 tonnes of gold.

  9. CMS Wallet Card

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CMS Wallet Card is a quick reference statistical summary on annual CMS program and financial data. The CMS Wallet Card is available for each year from 2004...

  10. CMS Fast Facts

    Data.gov (United States)

    U.S. Department of Health & Human Services — CMS has developed a new quick reference statistical summary on annual CMS program and financial data. CMS Fast Facts includes summary information on total program...

  11. CMS Requirements for the Grid

    Institute of Scientific and Technical Information of China (English)

    K.Holtman; J.Amundson; 等

    2001-01-01

    CMS physicists need to seamlessly access their experimental data and results,independent of location and storage medium,in order to focus on the exploration for the new physics signals arther than the complexities of worldwide data management .In order to achieve this goal,CMS has adopted a tiered worldwide computing model which will incorporate emerging Grid technology.CMS has started to use Grid tools for data processing,replication and migration,Important Grid components are expected to be delivered by the Data Grid projects.like projects,CMS has created a set of long-term requirements to the Grid projects.These requirements are presented and discussed.

  12. CMS-Wave Model: Part 4. An Automated Procedure for CMS-Wave in Resource-Demanding Applications

    Science.gov (United States)

    2011-04-01

    user’s manual for CMS -Wave are available (Lin et al. 2008, 2006; Demirbilek et al. 2007). CMS -Wave is part of the Coastal Modeling System developed...at the same level as the subfolders. Figure 2 shows the contents of the Visser_1991 example subfolder, including two CMS -Wave simulations, named as...and the surrounding area (red line denotes the CMS domain). The Coastal Modeling System ( CMS ) was applied to evaluate current and sedimentation

  13. The radiation monitoring system for the LHC experiments and experimental areas

    CERN Document Server

    Ilgner, C

    2004-01-01

    With the high energies stored in the beams of the LHC, special attention needs to be paid to accident scenarios involving beam losses which may have an impact on the installed experiments. Among others, an unsynchronized beam abort and a D1 magnet failure are considered serious cases. According to simulations, the CMS inner tracker in such accident scenarios can be damaged by instantaneous rates which are many orders of magnitude above normal conditions. Investigations of synthetic diamond as a beam condition monitor sensor, capable of generating a fast beam dump signal, will be presented. Furthermore, a system to monitor the radiation fields in the experimental areas is being developed. It must function in the radiation fields inside and around the experiments, over a large dynamic range. Several new active and passive sensors, such as RadFET, OSL (Optically Stimulated Luminescence) sensors, p-i-n diodes, Polymer-Alanine Dosimeters and TLDs (Thermoluminescent Dosimeters) are under investigation. Recent resul...

  14. The CMS Detector Power System

    CERN Document Server

    Lusin, S

    2008-01-01

    The power system for the on-detector electronics of the CMS Experiment comprises approximately 12000 low voltage channels, with a total power requirement of 1.1 MVA. The radiation environment inside the CMS experimental cavern combined with an ambient magnetic field (reaching up to 1.3 kGauss at the detector periphery) severely limit the available choices of low voltage supplies, effectively ruling out the use of commercial off-the-shelf DC power supplies. Typical current requirements at the CMS detector front end range from 1A-30A per channel at voltages ranging between 1.25V and 8V. This requires in turn that the final stage of the low voltage power supply be located on the detector periphery. Power to the CMS front-end electronics is stabilized by a 2 MVA uninterruptible power supply (UPS) located in a CMS surface building. This UPS isolates the CMS detector from disturbances on the local power grid and provides for 2 minutes of autonomy following a power failure, allowing for an orderly shutdown of detect...

  15. Performance of a Large-Area GEM Detector Prototype for the Upgrade of the CMS Muon Endcap System

    CERN Document Server

    INSPIRE-00317764; Abbas, M.; Abbrescia, M.; Abdelalim, A.A.; Abi Akl, M.; Ahmed, W.; Ahmed, W.; Altieri, P.; Aly, R.; Asawatangtrakuldee, C.; Ashfaq, A.; Aspell, P.; Assran, Y.; Awan, I.; Bally, S.; Ban, Y.; Banerjee, S.; Barria, P.; Benussi, L.; Bhopatkar, V.; Bianco, S.; Bos, J.; Bouhali, O.; Braibant, S.; Buontempo, S.; Calabria, C.; Caponero, M.; Caputo, C.; Cassese, F.; Castaneda, A.; Cauwenbergh, S.; Cavallo, F.R.; Celik, A.; Choi, M.; Choi, K.; Choi, S.; Christiansen, J.; Cimmino, A.; Colafranceschi, S.; Colaleo, A.; Conde Garcia, A.; Dabrowski, M.M.; De Lentdecker, G.; de Oliveira, R.; De Robertis, G.; Dildick, S.; Dorney, B.; Elmetenawee, W.; Fabrice, G.; Ferrini, M.; Ferry, S.; Giacomelli, P.; Gilmore, J.; Guiducci, L.; Gutierrez, A.; Hadjiiska, R.M.; Hassan, A.; Hauser, J.; Hoepfner, K.; Hohlmann, M.; Hoorani, H.; Jeng, Y.G.; Kamon, T.; Karchin, P.E.; Kim, H.S.; Krutelyov, S.; Kumar, A.; Lee, J.; Lenzi, T.; Litov, L.; Loddo, F.; Maerschalk, T.; Magazzu, G.; Maggi, M.; Maghrbi, Y.; Magnani, A.; Majumdar, N.; Mal, P.K.; Mandal, K.; Marchioro, A.; Marinov, A.; Merlin, J.A.; Mohanty, A.K.; Mohapatra, A.; Muhammad, S.; Mukhopadhyay, S.; Naimuddin, M.; Nuzzo, S.; Oliveri, E.; Pant, L.M.; Paolucci, P.; Park, I.; Passeggio, G.; Pavlov, B.; Philipps, B.; Phipps, M.; Piccolo, D.; Postema, H.; Pugliese, G.; Baranac, A.Puig; Radi, A.; Radogna, R.; Raffone, G.; Ramkrishna, S.; Ranieri, A.; Riccardi, C.; Rodrigues, A.; Ropelewski, L.; RoyChowdhury, S.; Ryu, M.S.; Ryu, G.; Safonov, A.; Sakharov, A.; Salva, S.; Saviano, G.; Sharma, A.; Swain, S.K.; Talvitie, J.P.; Tamma, C.; Tatarinov, A.; Turini, N.; Tuuva, T.; Twigger, J.; Tytgat, M.; Vai, I.; van Stenis, M.; Venditi, R.; Verhagen, E.; Verwilligen, P.; Vitulo, P.; Wang, D.; Wang, M.; Yang, U.; Yang, Y.; Yonamine, R.; Zaganidis, N.; Zenoni, F.; Zhang, A.

    2016-03-14

    Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the $1.5 < \\mid\\eta\\mid < 2.2$ region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips with 455 $\\mu$rad pitch arranged in eight $\\eta$-sectors. We assembled a full-size GE1/1 prototype of 1m length at Florida Tech and tested it in 20-120 GeV hadron beams at Fermilab using Ar/CO$_{2}$ 70:30 and the RD51 scalable readout system. Four small GEM detectors with 2-D readout and an average measured azimuthal resolution of 36 $\\mu$rad provided precise reference tracks. Construction of this largest GEM detector built to-date is described. Strip cluster parameters, detection efficiency, and spatial resolution are studied with position and high voltage scans. The plateau detection efficiency is [97.1 $\\pm...

  16. Experimental fatigue curves for aluminium brazed areas

    Science.gov (United States)

    Dimitescu, A.; Babiş, C.; Niţoi, D. F.; Radu, C.

    2017-08-01

    An important factor for the quality of joints is the brazed area. The fatigue check occupies a major position among many test procedures and methods, especially by the joining technologies. The results of processing the fatigue data experiments for aluminium brazed samples are used to find the regression function and the response surface methodology. The fatigue process of mechanical components under service loading is stochastic in nature. The prediction of time-dependent fatigue reliability is critical for the design and maintenance planning of many structural components.

  17. Faces of CMS: Photomosaic (September 2013, low-resolution)

    CERN Multimedia

    Antonelli, Jamie

    2013-01-01

    The "Faces of CMS" photomosaic project aims to show the human element of the CMS Experiment. Most of the images for public outreach show the experimental equipment of CMS or physics results and collision displays. With a collaboration of around 3,000 people scattered around the globe, it's difficult to present the members of CMS in any one image. We asked any interested CMS members to sign up for the project, and allow us to use their photographs. The resulting photo mosaic contains the faces of 1,271 CMS members.

  18. CMS Program Statistics

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CMS Office of Enterprise Data and Analytics has developed CMS Program Statistics, which includes detailed summary statistics on national health care, Medicare...

  19. CMS Drug Spending

    Data.gov (United States)

    U.S. Department of Health & Human Services — CMS has released several information products that provide spending information for prescription drugs in the Medicare and Medicaid programs. The CMS Drug Spending...

  20. CMS brochure (English version)

    CERN Multimedia

    Marcastel, Fabienne

    2014-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which has started up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  1. CMS brochure (Spanish version)

    CERN Multimedia

    Lefevre, C

    2008-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  2. CMS brochure (Polish version)

    CERN Multimedia

    Lefevre, C

    2008-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  3. CMS Brochure (english version)

    CERN Multimedia

    Marcastel, F.

    2006-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  4. CMS brochure (English)

    CERN Multimedia

    Lefevre, C

    2009-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  5. CMS brochure (French)

    CERN Multimedia

    Lefevre, C

    2009-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  6. CMS Brochure (italian version)

    CERN Multimedia

    Marcastel, F

    2007-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  7. CMS Brochure (french version)

    CERN Multimedia

    Marcastel, F.

    2006-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  8. CMS Brochure (german version)

    CERN Multimedia

    Marcastel, F

    2007-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  9. CMS brochure (Italian version)

    CERN Multimedia

    Lefevre, C

    2010-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which started up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  10. CMS brochure (Greek version)

    CERN Multimedia

    Lefèvre, C

    2006-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  11. CMS Records Schedule

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CMS Records Schedule provides disposition authorizations approved by the National Archives and Records Administration (NARA) for CMS program-related records...

  12. CMS brochure (Catalan version)

    CERN Multimedia

    Lefevre, C

    2008-01-01

    CMS is the heaviest detector at the LHC, the most powerful particle accelerator in the world, which will start up in 2008. A multi-purpose detector, CMS is composed of several systems built around a powerful superconducting magnet.

  13. CMS 2006 - CMS France days; CMS 2006 les journees CMS FRANCE

    Energy Technology Data Exchange (ETDEWEB)

    Huss, D.; Dobrzynski, L.; Virdee, J.; Boudoule, G.; Fontaine, J.C.; Faure, J.L.; Paganini, P.; Mathez, H.; Gross, L.; Charlot, C.; Trunov, A.; Patois, Y.; Busson, P.; Maire, M.; Berthon, U.; Todorov, T.; Beaudette, F.; Sirois, Y.; Baffioni, S.; Beauceron, S.; Delmeire, E.; Agram, J.L.; Goerlach, U.; Mangeol, D.; Salerno, R.; Bloch, D.; Lassila-Perini, K.; Blaha, J.; Drobychev, G.; Gras, P.; Hagenauer, M.; Denegri, D.; Lounis, A.; Faccio, F.; Lecoq, J

    2006-07-01

    These CMS talks give the opportunity for all the teams working on the CMS (Compact Muon Spectrometer) project to present the status of their works and to exchange ideas. 5 sessions have been organized: 1) CMS status and perspectives, 2) contributions of the different laboratories, 3) software and computation, 4) physics with CMS (particularly the search for the Higgs boson), and 5) electronic needs. This document gathers the slides of the presentations.

  14. CMS offline web tools

    CERN Document Server

    Metson, S; Bockelman, B; Dziedziniewicz, K; Egeland, R; Elmer, P; Eulisse, G; Evans, D; Fanfani, A; Feichtinger, D; Kavka, C; Kuznetsov, V; Van Lingen, F; Newbold, D; Tuura, L; Wakefield, S

    2008-01-01

    We describe a relatively new effort within CMS to converge on a set of web based tools, using state of the art industry techniques, to engage with the CMS offline computing system. CMS collaborators require tools to monitor various components of the computing system and interact with the system itself. The current state of the various CMS web tools is described along side current planned developments.

  15. CMS-Wave

    Science.gov (United States)

    2014-10-27

    2014 2. REPORT TYPE 3. DATES COVERED 00-00-2014 to 00-00-2014 4. TITLE AND SUBTITLE CMS -Wave 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM...Program CMS -Wave CMS -Wave is a two-dimensional spectral wind-wave generation and transformation model that employs a forward-marching, finite...difference method to solve the wave action conservation equation. Capabilities of CMS -Wave include wave shoaling, refraction, diffraction, reflection

  16. Study of gas purifiers in the CMS RPC detector

    CERN Document Server

    Saviano, Giovanna

    2010-01-01

    The CMS RPC muon detector utilizes a gas recirculation system (Closed Loop) to cope with high gas mixture volumes and costs. A systematic study of Closed Loop gas purifiers has been carried out in 2008 and 2009 at the ISR experimental area of CERN, with the use of RPC chambers with currents monitoring, and gas analysis sampling points. Results on contaminants release and purifier characterization are presented

  17. CMS Comic Book Brochure

    CERN Document Server

    2006-01-01

    To raise students' awareness of what the CMS detector is, how it was constructed and what it hopes to find. Titled "CMS Particle Hunter," this colorful comic book style brochure explains to young budding scientists and science enthusiasts in colorful animation how the CMS detector was made, its main parts, and what scientists hope to find using this complex tool.

  18. CMS Central Hadron Calorimeter

    OpenAIRE

    Budd, Howard S.

    2001-01-01

    We present a description of the CMS central hadron calorimeter. We describe the production of the 1996 CMS hadron testbeam module. We show the results of the quality control tests of the testbeam module. We present some results of the 1995 CMS hadron testbeam.

  19. CMS Centre at CERN

    CERN Multimedia

    2007-01-01

    A new "CMS Centre" is being established on the CERN Meyrin site by the CMS collaboration. It will be a focal point for communications, where physicists will work together on data quality monitoring, detector calibration, offline analysis of physics events, and CMS computing operations. Construction of the CMS Centre begins in the historic Proton Synchrotron (PS) control room. The historic Proton Synchrotron (PS) control room, Opened by Niels Bohr in 1960, will be reused by CMS to built its control centre. TThe LHC@FNAL Centre, in operation at Fermilab in the US, will work very closely with the CMS Centre, as well as the CERN Control Centre. (Photo Fermilab)The historic Proton Synchrotron (PS) control room is about to start a new life. Opened by Niels Bohr in 1960, the room will be reused by CMS to built its control centre. When finished, it will resemble the CERN Contro...

  20. Commissioning of the CMS Magnet

    CERN Document Server

    Campi, D; Gaddi, A; Gerwig, H; Hervé, A; Klyukhin, V; Maire, G; Perinic, G; Brédy, P; Fazilleau, P; Kircher, F; Levésy, B; Fabbricatore, P; Farinon, S; Greco, M

    2007-01-01

    CMS (Compact Muon Solenoid) is one of the large experiments for the LHC at CERN. The superconducting magnet for CMS has been designed to reach a 4 T field in a free bore of 6 m diameter and 12.5 m length with a stored energy of 2.6 GJ at full current. The flux is returned through a 10 000 t yoke comprising of five wheels and two end caps composed of three disks each. The magnet was designed to be assembled and tested in a surface hall, prior to be lowered at 90 m below ground, to its final position in the experimental cavern. The distinctive feature of the cold mass is the four-layer winding, made from a reinforced and stabilized NbTi conductor. The design and construction was carried out by CMS participating institutes through technical and contractual endeavors. Among them CEA Saclay, INFN Genova, ETH Zurich, Fermilab, ITEP Moscow, University of Wisconsin and CERN. The construction of the CMS Magnet, and of the coil in particular, has been completed last year. The magnet has just been powered to full field ...

  1. CMS MANANGEMENT MEETINGS

    CERN Multimedia

    Management Board Agendas and minutes of meetings of the Management Board are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=223 Collaboration Board Agendas and minutes of meetings of the Collaboration Board are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=174 LHCC: Feedback from the CMS Referees, LHCC 97 February 25, 2009. The CMS LHCC referees met with representatives of CMS on 17-2-09, to review progress since the last November minireview. The main topics included shutdown construction, maintenance and repairs; status of the preshower detector; commissioning and physics analysis results from cosmic ray running and CSA08; preparations for physics, off line analysis, computing, and data distribution. TOTEM management and the TOTEM referees then joined us for a joint session to examine the readiness of the TOTEM detector. Detector construction, maintenance, and repairs. The referees congratulate CMS Management and the Detector Groups for the...

  2. International Masterclass at CMS

    CERN Multimedia

    Lapka, M

    2012-01-01

    The CMS collaboration welcomed a class of French high school students to the CERN facility in Meyrin, Switzerland on the 12 of March, 2012. Students spent the day meeting with physicists, hearing talks, asking questions, and participating in a hands-on exercise using real data collected by the CMS experiment on the Large Hadron Colider. Talks and other resources are available here: http://ippog-dev.web.cern.ch/resources/2012/ippog-international-masterclass-2012-cms

  3. CMS upgrades for SLHC

    CERN Document Server

    Palla, Fabrizio

    2006-01-01

    I will discuss the impact of the LHC luminosity upgrade on CMS detector. While most of the CMS can possibly cope with the increased luminosity, the Tracker must undergo a major redesign in technology both in terms of detector substrates as well as in the data transfer links. I will show the impact on CMS of reduced bunch length and machine elements close to the interaction point.

  4. Development of interfacial area transport equation - modeling and experimental benchmark

    Energy Technology Data Exchange (ETDEWEB)

    Ishii, M. [Purdue Univ., West Lafayette, Indiana (United States)

    2011-07-01

    A dynamic treatment of interfacial area concentration has been studied over the last decade by employing the interfacial area transport equation. When coupled with the two-fluid model, the interfacial area transport equation replaces the flow regime dependent correlations for interfacial area concentration and eliminates potential artificial bifurcation or numerical oscillations stemming from these static correlations. An extensive database has been established to evaluate the model under various two-phase flow conditions. These include adiabatic and heated conditions, vertical and horizontal flow orientations, round, rectangular, annulus and 8×8 rod bundle channel geometries, and normal-gravity and simulated reduced-gravity conditions. This paper reviews the current state-of-the-art in the development of the interfacial area transport equation, available experimental databases and 1D and 3D benchmarking work of the interfacial area transport equation. (author)

  5. CMS Virtual Visit - Researchers Night in Portugal

    CERN Multimedia

    Abreu, Pedro

    2016-01-01

    Researchers Night at Planetarium Calouste Gulbenkian - Ciência Viva Centre in Lisbon. Organised by researchers from LIP (Laboratório de Instrumentação e Física Experimental de Partículas) and including CMS Virtual Visit during which André David Tinoco Mendes and José Rasteiro da Silva, based at Cessy, France, "virtually" discussed science and technology behind the CMS detector with the audience in Lisbon.

  6. Giant CMS magnet goes underground at CERN

    CERN Multimedia

    2007-01-01

    "Scientists of the US CMS collaboration joined colleagues around the world in announcing today (February 28) that the heaviest piece of the Compact Muon Solenoid particle detector has begun the momentous journey into its experimental cavern 100 meters underground. A huge gantry crne is slowly lowering the CMS detector's preassembled central section into place in the Large Hadron Collider accelerator at CERN in Geneva, Switzerland." (1 page)

  7. Hamamatsu APD for CMS ECAL: quality insurance

    Energy Technology Data Exchange (ETDEWEB)

    Bailleux, D.; Britvitch, I.; Deiters, K.; Egeland, R.; Gilbert, B.; Grahl, J.; Ingram, Q.; Kuznetsov, A.; Lester, E.; Musienko, Y.; Renker, D.; Reucroft, S.; Rusack, R.; Sakhelashvili, T.; Singovski, A. E-mail: Alexander.Singovski@cern.ch; Swain, J

    2004-02-01

    The Hamamatsu Photonics S8148 large area Avalanche Photo Diodes (APD) were designed for the crystal electromagnetic calorimeter of the CMS setup at LHC in a close collaboration of Hamamatsu Photonics and CMS APD group (PSI, Northeastern University and University of Minnesota). All essential parameters of these devices are controlled by the producer and are fairly stable during the mass production, except the radiation hardness. To insure 99.9% reliability of APDs in the radiation hard environment of LHC, the CMS APD group had to invent a dedicated screening procedure. The details of this procedure and some results of the screening are discussed.

  8. Hamamatsu APD for CMS ECAL Quality insurance

    CERN Document Server

    Bailleux, D; Deiters, K; Egeland, R; Gilbert, B; Grahl, J; Ingram, Q; Kuznetsov, A; Lester, E; Musienko, Y; Renker, D; Reucroft, S; Rusack, R W; Sakhelashvili, T M; Singovsky, A V; Swain, J D

    2004-01-01

    The Hamamatsu Photonics S8148 large area Avalanche Photo Diodes (APD) were designed for the crystal electromagnetic calorimeter of the CMS setup at LHC in a close collaboration of Hamamatsu Photonics and CMS APD group (PSI, Northeastern University and University of Minnesota). All essential parameters of these devices are controlled by the producer and are fairly stable during the mass production, except the radiation hardness. To insure 99.9% reliability of APDs in the radiation hard environment of LHC, the CMS APD group had to invent a dedicated screening procedure. The details of this procedure and some results of the screening are discussed.

  9. CMS experiment : animation showing the construction of the main structural components of CMS together

    CERN Multimedia

    2006-01-01

    This 17-minute long animation shows the construction of the main structural components of CMS in the surface hall in Cessy and offers a detailed overview of the installation in the experimental cavern.

  10. CMS experiment : animation showing the construction of the main structural components of CMS together

    CERN Multimedia

    CERN Multimedia Production Unit

    2003-01-01

    This 17-minute long animation shows the construction of the main structural components of CMS in the surface hall in Cessy and offers a detailed overview of the installation in the experimental cavern.

  11. CMS Virtual Tour Greece

    CERN Document Server

    CERN. Geneva

    2014-01-01

    More than 500 high-school students from 7 locations in Greece visit virtually the CMS experiment. Read more about this record-breaking event here: http://home.web.cern.ch/students-educators/updates/2014/02/students-visit-heart-cms-detector

  12. CMS MANAGEMENT MEETINGS

    CERN Multimedia

    2010-01-01

    The Agendas and Minutes of the Management Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=223 The Agendas and Minutes of the Collaboration Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=174

  13. Inserting the CMS solenoid

    CERN Multimedia

    Maximilien Brice

    2005-01-01

    The huge superconducting solenoid for CMS is inserted into the cryostat barrel. CMS uses the world's largest thin solenoid, in terms of energy stored, and is 12 m long, with a diameter of 6 m and weighing 220 tonnes. When turned on the magnet will produce a field strength of 4 T using superconducting niobium-titanium material at 4.5 K.

  14. CMS MANAGEMENT MEETINGS

    CERN Multimedia

    2011-01-01

    The Agendas and Minutes of the Management Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=223 The Agendas and Minutes of the Collaboration Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=174

  15. CMS MANAGEMENT MEETINGS

    CERN Multimedia

    2011-01-01

    The Agendas and Minutes of the Management Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=223 The Agendas and Minutes of the Collaboration Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=174  

  16. CMS MANAGEMENT MEETINGS

    CERN Multimedia

    2012-01-01

      The Agendas and Minutes of the Management Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=223 The Agendas and Minutes of the Collaboration Board meetings are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=174

  17. CMS Experiment Data Processing at RDMS CMS Tier 2 Centers

    CERN Document Server

    Gavrilov, V; Korenkov, V; Tikhonenko, E; Shmatov, S; Zhiltsov, V; Ilyin, V; Kodolova, O; Levchuk, L

    2012-01-01

    Russia and Dubna Member States (RDMS) CMS collaboration was founded in the year 1994 [1]. The RDMS CMS takes an active part in the Compact Muon Solenoid (CMS) Collaboration [2] at the Large Hadron Collider (LHC) [3] at CERN [4]. RDMS CMS Collaboration joins more than twenty institutes from Russia and Joint Institute for Nuclear Research (JINR) member states. RDMS scientists, engineers and technicians were actively participating in design, construction and commissioning of all CMS sub-detectors in forward regions. RDMS CMS physics program has been developed taking into account the essential role of these sub-detectors for the corresponding physical channels. RDMS scientists made large contribution for preparation of study QCD, Electroweak, Exotics, Heavy Ion and other physics at CMS. The overview of RDMS CMS physics tasks and RDMS CMS computing activities are presented in [5-11]. RDMS CMS computing support should satisfy the LHC data processing and analysis requirements at the running phase of the CMS experime...

  18. CMS MANAGEMENT MEETINGS

    CERN Multimedia

    Management Board Agendas and minutes of meetings of the Management Board are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=223 Collaboration Board Agendas and minutes of meetings of the Collaboration Board are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=174 LHCC: Feedback from the CMS Referees, LHCC 97 February 25, 2009. The CMS LHCC referees met with representatives of CMS on 17-2-09, to review progress since the last November minireview. The main topics included  shutdown construction, maintenance and repairs;  status of the preshower detector; commissioning and physics analysis results from cosmic ray running and CSA08;   preparations for physics, off line analysis, computing, and data distribution. TOTEM management and the TOTEM referees then joined us for a joint session to examine the readiness of the TOTEM detector. Detector construction, maintenance, and repairs. The referees congratulate C...

  19. CMS MANAGEMENT MEETINGS

    CERN Multimedia

    Jim Virdee

    Management Board Agendas and minutes of meetings of the Management Board are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=223 Collaboration Board Agendas and minutes of meetings of the Collaboration Board are accessible to CMS members at: http://indico.cern.ch/categoryDisplay.py?categId=174 LHCC: Feedback from the CMS Referees, LHCC 97 February 25, 2009. The CMS LHCC referees met with representatives of CMS on 17-2-09, to review progress since the last November minireview. The main topics included  shutdown construction, maintenance and repairs;  status of the preshower detector; commissioning and physics analysis results from cosmic ray running and CSA08;   preparations for physics, off line analysis, computing, and data distribution. TOTEM management and the TOTEM referees then joined us for a joint session to examine the readiness of the TOTEM detector. Detector construction, maintenance, and repairs. The referees congratula...

  20. Control Modules for Scintillation Counters in the SPS Experimental Areas

    CERN Document Server

    Baribaud, Guy; Cojan, A; Ferri, G; Fullerton, J; Manarin, A; Spanggaard, J

    2001-01-01

    The hardware used in the SPS Experimental Areas to control the beam instrumentation electronics and mechanics of the particle detectors is based on CAMAC and NIM modules. The maintenance of this hardware now presents very serious problems. The modules used to operate the Experimental Areas are numerous and older than 20 years so many of them cannot be repaired any more and CAMAC is no longer well supported by industry. The fast evolution of technology and a better understanding of the detectors allow a new equipment-oriented approach, which is more favourable for maintenance purposes and presents fewer data handling problems. VME and IP Modules were selected as standard components to implement the new electronics to control and read out the particle detectors. The first application implemented in this way concerns the instrumentation for the Scintillation Counters (formerly referred to as triggers). The fundamental options and the design features will be presented.

  1. Award for the best CMS thesis

    CERN Multimedia

    2003-01-01

    The 2002 CMS PhD Thesis Award for has been presented to Giacomo Luca Bruno for his thesis defended at the University of Pavia in Italy and entitled "The RPC detectors and the muon system for the CMS experiment at the LHC". His work was supervised by Sergio P. Ratti from the University of Pavia. Since April 2002, Giacomo has been employed as a research fellow by CERN's EP Division. He continues to work on CMS in the areas of data acquisition and physics reconstruction and selection. Last Monday he received a commemorative engraved plaque from Lorenzo Foà, chairman of the CMS Collaboration Board. He will also receive expenses paid to an international physics conference to present his thesis results. Giacomo Luca Bruno with Lorenzo Foà

  2. CMS Analysis School Model

    Energy Technology Data Exchange (ETDEWEB)

    Malik, S. [Nebraska U.; Shipsey, I. [Purdue U.; Cavanaugh, R. [Illinois U., Chicago; Bloom, K. [Nebraska U.; Chan, Kai-Feng [Taiwan, Natl. Taiwan U.; D' Hondt, J. [Vrije U., Brussels; Klima, B. [Fermilab; Narain, M. [Brown U.; Palla, F. [INFN, Pisa; Rolandi, G. [CERN; Schörner-Sadenius, T. [DESY

    2014-01-01

    To impart hands-on training in physics analysis, CMS experiment initiated the concept of CMS Data Analysis School (CMSDAS). It was born over three years ago at the LPC (LHC Physics Centre), Fermilab and is based on earlier workshops held at the LPC and CLEO Experiment. As CMS transitioned from construction to the data taking mode, the nature of earlier training also evolved to include more of analysis tools, software tutorials and physics analysis. This effort epitomized as CMSDAS has proven to be a key for the new and young physicists to jump start and contribute to the physics goals of CMS by looking for new physics with the collision data. With over 400 physicists trained in six CMSDAS around the globe, CMS is trying to engage the collaboration in its discovery potential and maximize physics output. As a bigger goal, CMS is striving to nurture and increase engagement of the myriad talents, in the development of physics, service, upgrade, education of those new to CMS and the career development of younger members. An extension of the concept to the dedicated software and hardware schools is also planned, keeping in mind the ensuing upgrade phase.

  3. Tilt meters for the Alignment System of the CMS Experiment: Users Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Alberdi, J.; Arce, P.; Barcala, J.M.; Calvo, E.; Ferrando, A.; Josa, M.I.; Molinero, A.; Navarrete, J.; Oller, J.C.; Yuste, C.

    2007-09-27

    We present the instructions for the use of the electrolytic tilt meters installed in the link alignments system of the CMS experimental and give the Data Base to be used as a Handbook during CMS operation. (Author) 16 refs.

  4. Data Scouting in CMS

    CERN Document Server

    Anderson, Dustin James

    2016-01-01

    In 2011, the CMS collaboration introduced Data Scouting as a way to produce physics results with events that cannot be stored on disk, due to resource limits in the data acquisition and offline infrastructure. The viability of this technique was demonstrated in 2012, when 18 fb$^{-1}$ of collision data at $\\sqrt{s}$ = 8 TeV were collected. The technique is now a standard ingredient of CMS and ATLAS data-taking strategy. In this talk, we present the status of data scouting in CMS and the improvements introduced in 2015 and 2016, which promoted data scouting to a full-fledged, flexible discovery tool for the LHC Run II.

  5. SIGURNOST CMS-A

    OpenAIRE

    Kaluža, Marin; Vukelić, Bernard; Rojko, Tamara

    2016-01-01

    Za razvoj web-sjedišta danas se često koriste CMS-ovi. Web-sjedišta meta su raznim malicioznim napadačima, stoga je potrebno poznavati razinu sigurnosti web-sjedišta i postaviti maksimalnu moguću razinu sigurnosti. U radu su prikazane osnovne značajke poznatijih CMS-ova u otvorenom pristupu Wordpress, Joomla i Drupal. Objašnjeno je deset najčešćih web-ranjivosti. Izvršeno je testiranje web-ranjivosti pomoću različitih programskih alata. Testirane su osnovne instalacije CMS-ova. Nakon ...

  6. Experimental log hauling through a traditional caribou wintering area

    Directory of Open Access Journals (Sweden)

    Harold G. Cumming

    1998-03-01

    Full Text Available A 3-year field experiment (fall 1990-spring 1993 showed that woodland caribou (Rangifer tarandus caribou altered their dispersion when logs were hauled through their traditional wintering area. Unlike observations in control years 1 and 3, radio-collared caribou that had returned to the study area before the road was plowed on January 6 of the experimental year 2, moved away 8-60 km after logging activities began. Seasonal migration to Lake Nipigon islands usually peaked in April, but by February 22 of year 2, 4 of the 6 had returned. The islands provide summer refuge from predation, but not when the lake is frozen. Tracks in snow showed that some caribou remained but changed locations. They used areas near the road preferentially in year 1, early year 2, and year 3, but moved away 2-5 km after the road was plowed in year 2. In a nearby undisturbed control area, no such changes occurred. Caribou and moose partitioned habitat on a small scale; tracks showed gray wolf (Canis lupus remote from caribou but close to moose tracks. No predation on caribou was observed within the wintering area; 2 kills were found outside it. Due to the possibility of displacing caribou from winter refugia to places with higher predation risk, log hauling through important caribou winter habitat should be minimized.

  7. CMS Financial Reports

    Data.gov (United States)

    U.S. Department of Health & Human Services — This section contains the annual CMS financial statements as required under the Chief Financial Officers (CFO) Act of 1990 (P.L. 101-576). The CFO Act marked a major...

  8. CMS Statistics Reference Booklet

    Data.gov (United States)

    U.S. Department of Health & Human Services — The annual CMS Statistics reference booklet provides a quick reference for summary information about health expenditures and the Medicare and Medicaid health...

  9. CMS Space Monitoring

    Energy Technology Data Exchange (ETDEWEB)

    Ratnikova, N. [Fermilab; Huang, C.-H. [Fermilab; Sanchez-Hernandez, A. [CINVESTAV, IPN; Wildish, T. [Princeton U.; Zhang, X. [Beijing, Inst. High Energy Phys.

    2014-01-01

    During the first LHC run, CMS stored about one hundred petabytes of data. Storage accounting and monitoring help to meet the challenges of storage management, such as efficient space utilization, fair share between users and groups and resource planning. We present a newly developed CMS space monitoring system based on the storage metadata dumps produced at the sites. The information extracted from the storage dumps is aggregated and uploaded to a central database. A web based data service is provided to retrieve the information for a given time interval and a range of sites, so it can be further aggregated and presented in the desired format. The system has been designed based on the analysis of CMS monitoring requirements and experiences of the other LHC experiments. In this paper, we demonstrate how the existing software components of the CMS data placement system, PhEDEx, have been re-used, dramatically reducing the development effort.

  10. CMS cavern inspection robot

    CERN Document Server

    Ibrahim, Ibrahim

    2017-01-01

    Robots which are immune to the CMS cavern environment, wirelessly controlled: -One actuated by smart materials (Ionic Polymer-Metal Composites and Macro Fiber Composites) -One regular brushed DC rover -One servo-driven rover -Stair-climbing robot

  11. CMS Financial Reports

    Data.gov (United States)

    U.S. Department of Health & Human Services — This section contains the annual CMS financial statements as required under the Chief Financial Officers (CFO) Act of 1990 (P.L. 101-576). The CFO Act marked a major...

  12. Diphoton searches (CMS)

    CERN Document Server

    Quittnat, Milena Eleonore

    2016-01-01

    Many physics scenarios beyond the standard model predict the existence of heavy resonances decaying to diphotons. This talk presents searches for BSM physics in the diphoton final state at CMS, focusing on the recent results.

  13. CMS Collaboration Board Meeting

    CERN Multimedia

    Hoch, Michael

    2013-01-01

    The first CMS Collaboration Board meeting of the year (2013) provided an opportunity to thank Teresa Rodrigo, Matthias Kasemann and Randy Ruchti, the 2011-12 CB Chair, Deputy Chair and Secretary, respectively.

  14. CMS Tracker Performance

    CERN Document Server

    Palmonari, Francesco

    2012-01-01

    particle trajectories as well as primary and secondary vertices, multi-step calibration procedures including module alignment are required. Results from operating the CMS tracker during the first two years of 7 TeV LHC collisions will be presented. These include aspects such as the data acquisition, detector slow control, and data quality monitoring. Projections for the evolution of the CMS tracker performance with increasing irradiation will be given.

  15. b Tagging in CMS

    CERN Document Server

    Tomalin, Ian R

    2008-01-01

    Many of the exotic particles expected at the LHC, such as SUSY, Higgs bosons and top quarks, will decay to b quarks. This paper presents the methods used to identify b-jets at CMS. The algorithms exploit the long B hadron lifetime, semi-leptonic B decays and jet kinematics. The prospect for measuring the performance of these b-tags directly from CMS data is examined. Finally, the use of b-tagging in the High-Level Trigger is explained.

  16. The CMS Electronic Logbook

    CERN Multimedia

    Bukowiec, S; Beccati, B; Behrens, U; Biery, K; Branson, J; Cano, E; Cheung, H; Ciganek, M; Cittolin, S; Coarasa Perez, J A; Deldicque, C; Erhan, S; Gigi, D; Glege, F; Gomez-Reino, R; Hatton, D; Hwong, Y L; Loizides, C; Ma, F; Masetti, L; Meijers, F; Meschi, E; Meyer, A; Mommsen, R K; Moser, R; O’Dell, V; Orsini, L; Paus, C; Petrucci, A; Pieri, M; Racz, A; Raginel, O; Sakulin, H; Sani, M; Schieferdecker, P; Schwick, C; Shpakov, D; Simon, M; Sumorok, K; Sungho Yoon, A

    2010-01-01

    The CMS ELogbook (ELog) is a collaborative tool, which provides a platform to share and store information about various events or problems occurring in the Compact Muon Solenoid (CMS) experiment at CERN during operation. The ELog is based on a Model–View–Controller (MVC) software architectural pattern and uses an Oracle database to store messages and attachments. The ELog is developed as a pluggable web component in Oracle Portal in order to provide better management, monitoring and security.

  17. 27 Febuary 2012 - US DoE Associate Director of Science for High Energy Physics J. Siegrist visiting the LHC superconducting magnet test hall with adviser J.-P. Koutchouk and engineer M. Bajko; in CMS experimental cavern with Spokesperson J. Incadela;in ATLAS experimental cavern with Deputy Spokesperson A. Lankford; in ALICE experimental cavern with Spokesperson P. Giubellino; signing the guest book with Director for Accelerators and Technology S. Myers.

    CERN Multimedia

    Laurent Egli

    2012-01-01

    27 Febuary 2012 - US DoE Associate Director of Science for High Energy Physics J. Siegrist visiting the LHC superconducting magnet test hall with adviser J.-P. Koutchouk and engineer M. Bajko; in CMS experimental cavern with Spokesperson J. Incadela;in ATLAS experimental cavern with Deputy Spokesperson A. Lankford; in ALICE experimental cavern with Spokesperson P. Giubellino; signing the guest book with Director for Accelerators and Technology S. Myers.

  18. CMS Virtual Visit from Russia - 16 November 2015

    CERN Multimedia

    Belotelov, Ivan

    2016-01-01

    This event gathered 200+ high school students selected from all over Russia from three places: - high school students from "Experimental Physics Olympics" at Sirius center, Sochi - students from European Gymnasium, Moscow - interested people at "White leaf" lecturing space Pictures show the CMS Virtual Visit, preparation lecture and masterclass activity. CMS Guides for the Virtual Visit: Nikolay Voytishin & Alexey Kamenev

  19. n_TOF: a new experimental area under way

    CERN Multimedia

    Anaïs Schaeffer

    2013-01-01

    On Thursday 23 May, CERN celebrated the laying of the foundation stone of the new experimental area (EAR-2) of n_TOF – CERN’s neutron source facility*. Under a mild sun, Rolf Heuer, CERN Director-General, Enrico Chiaveri, spokesperson for the n_TOF collaboration, Frédérick Bordry, head of CERN’s Technology Department, and other important figures at CERN raised their glasses to the launch of this new scientific adventure.   Rolf Heuer, CERN Director-General, driving a backhoe at the EAR-2 foundation stone laying ceremony. “This new experimental area is very important as it shows the diversity of the science we are doing at CERN,” says Rolf Heuer. “One of the Laboratory’s goals is to build infrastructures and to do science that is unique, or at least world leading. And that is exactly what we are doing here.” The n_TOF collaboration is taking advantage of the long shutdown (LS1) for the const...

  20. CMS Thesis Award

    CERN Multimedia

    2004-01-01

    The 2003 CMS thesis award was presented to Riccardo Ranieri on 15 March for his Ph.D. thesis "Trigger Selection of WH → μ ν b bbar with CMS" where 'WH → μ ν b bbar' represents the associated production of the W boson and the Higgs boson and their subsequent decays. Riccardo received his Ph.D. from the University of Florence and was supervised by Carlo Civinini. In total nine thesis were nominated for the award, which was judged on originality, impact within the field of high energy physics, impact within CMS and clarity of writing. Gregory Snow, secretary of the awarding committee, explains why Riccardo's thesis was chosen, ‘‘The search for the Higgs boson is one of the main physics goals of CMS. Riccardo's thesis helps the experiment to formulate the strategy which will be used in that search.'' Lorenzo Foà, Chairperson of the CMS Collaboration Board, presented Riccardo with an commemorative engraved plaque. He will also receive the opportunity to...

  1. The CMS conductor

    CERN Document Server

    Blau, Bertrand; Curé, B; Folch, R; Hervé, A; Horváth, I L; Kircher, F; Musenich, R; Neuenschwander, J; Riboni, P; Seeber, B; Tavares, S; Sgobba, Stefano; Smith, R P

    2002-01-01

    The Compact Muon Solenoid (CMS) is one of the general-purpose detectors to be provided for the LHC project at CERN. The design field of the CMS superconducting magnet is 4 T, the magnetic length is 12.5 m and the free bore is 6 m. The magnetic field is achieved by means of a four-layer superconducting solenoid. The stored magnetic energy is 2.7 GJ at nominal current of 20 kA (at 4.5 K operating temperature). The coil is wound from a high purity aluminum- stabilized Rutherford type conductor. Unlike other existing Al- stabilized thin solenoids, the structural integrity of the CMS coil is ensured both by the Al-alloy reinforcement welded to the conductor and an external support cylinder. The flat NbTi cable is embedded in high purity aluminum by a continuous co-extrusion process. (7 refs).

  2. Higgs Physics at CMS

    CERN Document Server

    Donato, Silvio

    2017-01-01

    The discovery of the Standard Model Higgs boson performed by the CMS and ATLAS collaborations during the LHC Run 1 has been an important success. This document is a short review of the search for the Higgs boson performed by the CMS collaboration during the LHC Run 1 and Run 2. In the first part, after a brief description of the Higgs boson production and decay channels, the Run-1 results are presented emphasizing the possible hints of New Physics. The main part of this document is devoted to the search for the Higgs boson with the 13 TeV data collected by the CMS experiment in 2015 and 2016, including the Standard Model searches as well as the Beyond Standard Model searches, such as the search for additional Higgs bosons and for resonant and non-resonant double Higgs boson production.

  3. Physics with CMS and Electronic Upgrades

    Energy Technology Data Exchange (ETDEWEB)

    Rohlf, James W. [Boston Univ., MA (United States)

    2016-08-01

    The current funding is for continued work on the Compact Muon Solenoid (CMS) at the CERN Large Hadron Collider (LHC) as part of the Energy Frontier experimental program. The current budget year covers the first year of physics running at 13 TeV (Run 2). During this period we have concentrated on commisioning of the μTCA electronics, a new standard for distribution of CMS trigger and timing control signals and high bandwidth data aquistiion as well as participating in Run 2 physics.

  4. Automating the CMS DAQ

    Energy Technology Data Exchange (ETDEWEB)

    Bauer, G.; et al.

    2014-01-01

    We present the automation mechanisms that have been added to the Data Acquisition and Run Control systems of the Compact Muon Solenoid (CMS) experiment during Run 1 of the LHC, ranging from the automation of routine tasks to automatic error recovery and context-sensitive guidance to the operator. These mechanisms helped CMS to maintain a data taking efficiency above 90% and to even improve it to 95% towards the end of Run 1, despite an increase in the occurrence of single-event upsets in sub-detector electronics at high LHC luminosity.

  5. Automating the CMS DAQ

    CERN Document Server

    Bauer, Gerry; Behrens, Ulf; Branson, James; Chaze, Olivier; Cittolin, Sergio; Coarasa Perez, Jose Antonio; Darlea, Georgiana Lavinia; Deldicque, Christian; Dobson, Marc; Dupont, Aymeric; Erhan, Samim; Gigi, Dominique; Glege, Frank; Gomez Ceballos, Guillelmo; Gomez-Reino Garrido, Robert; Hartl, Christian; Hegeman, Jeroen Guido; Holzner, Andre Georg; Masetti, Lorenzo; Meijers, Franciscus; Meschi, Emilio; Mommsen, Remigius; Morovic, Srecko; Nunez Barranco Fernandez, Carlos; O'Dell, Vivian; Orsini, Luciano; Ozga, Wojciech Andrzej; Paus, Christoph Maria Ernst; Petrucci, Andrea; Pieri, Marco; Racz, Attila; Raginel, Olivier; Sakulin, Hannes; Sani, Matteo; Schwick, Christoph; Spataru, Andrei Cristian; Stieger, Benjamin Bastian; Sumorok, Konstanty; Veverka, Jan; Wakefield, Christopher Colin; Zejdl, Petr

    2014-01-01

    We present the automation mechanisms that have been added to the Data Acquisition and Run Control systems of the Compact Muon Solenoid (CMS) experiment during Run 1 of the LHC, ranging from the automation of routine tasks to automatic error recovery and context-sensitive guidance to the operator. These mechanisms helped CMS to maintain a data taking efficiency above 90\\% and to even improve it to 95\\% towards the end of Run 1, despite an increase in the occurrence of single-event upsets in sub-detector electronics at high LHC luminosity.

  6. CMS Comic Book

    CERN Multimedia

    Gill, Karl Aaron

    2006-01-01

    Titled "CMS Particle Hunter," this colorful comic book style brochure explains to young budding scientists and science enthusiasts in colorful animation how the CMS detector was made, its main parts, and what scientists hope to find using this complex tool. Book invites young students to get involved in particle physics themselves to join the adventure. Written by Dave Barney and Aline Guevera. Layout and drawings by Eric Paiharey and Frederic Vignaux. Available in English, French, German, Italian, Spanish and Portuguese. Year Produced: 2006. Update: September 2013.

  7. Model of CMS Tracker

    CERN Multimedia

    Breuker

    1999-01-01

    A full scale CMS tracker mock-up exposed temporarily in the hall of building 40. The purpose of the mock-up is to study the routing of services, assembly and installation. The people in front are only a small fraction of the CMS tracker collaboration. Left to right : M. Atac, R. Castaldi, H. Breuker, D. Pandoulas,P. Petagna, A. Caner, A. Carraro, H. Postema, M. Oriunno, S. da Mota Silva, L. Van Lancker, W. Glessing, G. Benefice, A. Onnela, M. Gaspar, G. M. Bilei

  8. First Physics at CMS

    CERN Document Server

    Mulders, Martijn

    2009-01-01

    The year 2008 marked the completion of the Large Hadron Collider (LHC) and the LHC detectors. The construction and commissioning of these scientific instruments, unprecedented in scale, complexity and precision, involved a number of challenging physics measurements and analyses, even before the first proton-proton collisions. This report highlights a selection of such physics measurements for and by the Cosmic Muon Solenoid (CMS) detector. These first physics analyses at CMS illustrate the depth of our understanding of the detector and demonstrate its readiness for data taking.

  9. Heavy Ions in CMS

    Directory of Open Access Journals (Sweden)

    Fernandez Perez Tomei Thiago Rafael

    2013-11-01

    Full Text Available The capabilities of the CMS experiment allow to investigate various hard probes, as well as bulk particle production and collective phenomena, using the calorimetry, muon and tracking systems covering a large range in pseudorapidity. In this paper selected results of the CMS experiment from p-p and Pb-Pb collisions at √sNN = 2.76 TeV are discussed. First results from the recent p-Pb Run at √sNN = 5.02 TeV are also be presented.

  10. CMS Tracker operational experience

    CERN Document Server

    Fiori, Francesco

    2016-01-01

    The CMS Tracker was repaired, recalibrated and commissioned successfully for the second run of Large Hadron Collider. In 2015 the Tracker performed well with improved hit efficiency and spatial resolution compared to Run I. Operations successfully transitioned to lower temperatures after commissioning environmental control and monitoring. This year the detector is expected to withstand luminosities that are beyond its design limits and will need a combined effort of both online and offline team to yield the high quality data that is required to reach our physics goals. We present the experience gained during the second run of the LHC and show the latest performance results of the CMS Tracker.

  11. ATLAS/CMS Upgrades

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00370685; The ATLAS collaboration

    2016-01-01

    Precision studies of the Standard Model (SM) and the searches of the physics beyond the SM are ongoing at the ATLAS and CMS experiments at the Large Hadron Collider (LHC). A luminosity upgrade of LHC is planned, which provides a significant challenge for the experiments. In this report, the plans of the ATLAS and CMS upgrades are introduced. Physics prospects for selected topics, including Higgs coupling measurements, Bs,d -> mumu decays, and top quark decays through flavor changing neutral current, are also shown.

  12. Webinar on PTM with CMS

    Science.gov (United States)

    2013-12-04

    Introduction to CMS Coastal and Hydraulics Laboratory Integrated waves, current, and sediment transport model in the Surface-water Modeling System ... CMS US Army Corps of Engineers BUILDING STRONG® PTM Webinar on PTM with CMS Mitchell E. Brown Civil Engineering Technician Honghai Li...COVERED 00-00-2013 to 00-00-2013 4. TITLE AND SUBTITLE Webinar on PTM with CMS 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT

  13. CERN Researchers' Night @ CMS + TOTEM

    CERN Multimedia

    Hoch, Michael

    2011-01-01

    Young researchers' shifter training at CMS; • Introduction talk with discussion, • CMS control room shadowing the shifters • TOTEM control room introduction and discusson • Scientific poster work shop and presentation • Science Art installations ‘Faces of CMS’ & ‘Science Cloud’ • CMS Shift diploma presentation

  14. Diboson Results from CMS

    CERN Document Server

    Nate Woods

    2017-01-01

    Measurements of diboson production in proton-proton collisions at the LHC, performed by the CMS Collaboration, are summarized. We report studies of ZZ production at $\\sqrt{s} = 13$~TeV, WZ production at $\\sqrt{s} = 8$ and $13$~TeV, $\\mathrm{WV} \\to \\ell\

  15. Exclusive Production at CMS

    CERN Document Server

    Walczak, Marek

    2016-01-01

    I briefly introduce so-called central exclusive production. I mainly focus on the example analyses that have been performed in the CMS experiment at CERN. I conclude with ideas and perspectives for future work that will be done during Run 2 of the LHC. I pay special attention to the ultraperipheral collisions.

  16. CMS SEES FIRST COLLISIONS

    CERN Multimedia

      A very special moment.  On 23rd November, 19:40 we recorded our first collisions with 450GeV beams well centred in CMS.   If you have any comments / suggestions please contact Karl Aaron GILL (Editor)

  17. CMS Achieves New Milestone

    CERN Multimedia

    2012-01-01

    In a year highlighted by the discovery of a new, Higgs-like boson, we must remember that CMS has had a tremendous year overall, with many physics results that have pushed our envelope of knowledge further. As of this week, we have published 200 papers. Congratulations to everyone involved!

  18. New Management for CMS

    CERN Multimedia

    CERN Bulletin

    2010-01-01

    As of January 2010, Guido Tonelli becomes the new CMS Spokesperson with a two-year term of office. A Professor of General Physics at the University of Pisa, Italy, and a CERN Staff Member since January 2010, Tonelli had already been appointed as Deputy Spokesperson under the previous management. He has taken over from Jim Virdee, who was CMS Spokesperson from January 2007 to December 2009. Guido Tonelli, new CMS spokesperson At the same time as Tonelli becomes Spokesperson, two new Deputies, Albert De Roeck and Joe Incandela, as well as a whole new set of Coordinators, are also starting their terms of office. ”With the first data-taking run we have shown that CMS is an excellent experiment. The next challenge will be to transform CMS into a discovery machine with a view to making it synonymous with scientific excellence. This will be very tough but, again, the winning element will be the focus and coherent effort of the whole collaboration. On my side I'll do my best but I will need...

  19. BEH Boson (CMS)

    CERN Document Server

    Checchia, Paolo

    2016-01-01

    The most relevant results on Higgs sector from CMS are presented. The status of the measurements of the Higgs Boson properties after the complete analysis of Run I dataset and an overview of the results obtained with the limited luminosity delivered at 13 TeV in 2015 are given. Implications of the results and future perspectives are also briefly discussed.

  20. The first half of CMS in its cavern

    CERN Multimedia

    Maximilien Brice

    2007-01-01

    The huge red magnetic yoke that will house the CMS detector has been lowered into the experimental hall. The yoke is layered with devices to detect muons, which penetrate through large amounts of solid matter.

  1. Top Mass Measurement at CMS

    CERN Document Server

    Duda, Markus

    2006-01-01

    Given the big cross section for \\ttbar production in proton-proton collisions at 14\\TeV, the LHC with its high luminosity will be, among others,a top factory, allowing a precision measurement of the top quark mass. Based on a detailed simulation of the CMS detector, the following top mass reconstruction accuracies are possible in the respective final states with the present knowledge of experimental and theoretical uncertainties. Delta m_t (di-leptonic, 1fbinv) = pm 1.5 (stat) pm 2.9 (syst.) GeVcc Delta m_t (semi-leptonic, 1fbinv) = pm 0.7 (stat) pm 1.9 (syst.) GeVcc Delta m_t (fully hadronic, 1fbinv) = pm 0.6(stat) pm 4.2 (syst.) GeVcc Delta m_t (di-leptonic}, 10 fbinv) = pm 0.5 (stat) pm 1.1 (syst.) GeVcc Delta m_t (semi-leptonic, 10 fbinv) = pm 0.2 (stat) pm 1.1 (syst.) GeVcc Delta m_t (JPsi, 20 fbinv) = pm 1.2 (stat) pm 1.5 (syst.) GeVcc A combined top mass accuracy of mathcal O (1GeVcc) for 10-20fbinv of well-understood CMS data will be feasible.

  2. Progress on CMS detector lowering

    CERN Multimedia

    2006-01-01

    It was an amazing engineering challenge - the lowering of the first hugeendcap disc (YE+3) of the CMS detector slowly and carefully 100 metres underground. The spectacular descent took place on 30 November and was documented by a film crew from Reuters news group. The uniquely shaped slice is 16 m high, about 50 cm thick, and weighs 400 tonnes. It is one of 15 sections that make up the complete CMS detector. The solid steel structure of the disc forms part of the magnet return yoke and is equipped on both sides with muon chambers. A special gantry crane lowered the element, with just 20 cm of leeway between the edges of the detector and the walls of the shaft! On 12 December, a further section of the detector (YE+2) containing the cathode strip chamber made the 10-hour journey underground. This piece is 16 m high and weighs 880 tonnes. There are now four sections of the detector in the experimental cavern, with a further 11 to follow. The endcap disc YE+3 (seen in the foreground) begins its journey down the ...

  3. A review on the establishment and research in hydrological experimental areas (catchments) in plain areas in China and abroad

    Science.gov (United States)

    Yang, Hai; Wang, Chuanhai; Hua, Wenjuan

    2017-04-01

    This paper reviewed some specific conceptions of hydrological experimental areas (catchments) while found that the traditional definition of 'catchment' may be difficult to meet in plain areas. According to the review of development history and current situation of hydrological experimental areas (catchments) in plain areas in China, 4 stages were shown besides the recent 10 years, i.e., 'golden stage(1952-1966)', 'backward stage(1966-1986)', 'short recovery stage(1986-1989)' and 'stagnant stage(1986-2006)'. It gets new impetus since 2006 with some investigation work promoted by the government. Furthermore, some historic problems during establishing experimental areas (catchments) in plain areas were revealed based on the document literature and a few meaningful lessons were drawn from the past. It was also the first time to collect and classify the details of both 11 representative experimental areas in China and abroad, after that a brief comparison about the measurement level and research directions was made between two regions. Additionally, we took the experimental research work in the plain of Taihu Lake Basin as example and introduced the particular research goals and the corresponding establishing process, including how to design the experimental area, eg, size, location, land use type, arranging the measurement instruments et al. We hope such case can provide a reference for newly-building, recovering and extending hydrological experimental areasin plain areas in the future. Finally, this paper prospected the future development in establishment and research in hydrological experimental areas (catchments) in plain areas. It may be more common to see the cooperation between model scientists and field experts. Because of the comprehensive goals in water problems, researchers from various fields would work together in the future experimental research work. Scale study and modelling in plain areas will be a promising branch after some typical experimental areas

  4. CMS General Poster 2009 : to raise awareness of CMS, the CMS detector, its parts and people

    CERN Document Server

    CMS outreach

    2012-01-01

    A poster which is identical to the two inside pages of the CMS brochure. The poster contains an image of a cross section of the CMS detector, explanation of detector parts, the aims of the CMS experiment and numbers of scientists and institutions associated with the experiment.

  5. 20 April 2011 - President of the European Commission J.M. Barroso visiting the LHC tunnel at Point 5 and CMS experimental cavern.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    CERN-HI-1104125 02 - 18: President Barroso is welcomed in the French territory by the Representative of the French Republic O. Laurens-Bernard, Sous-Préfet de Gex, then, in the welcome line, CERN Director General introduces: Director for Research and Scientific Computing S. Bertolucci Portuguese Delegate to CERN Council G. Barreira Head of International Relations F. Pauss Head of Physics Department P. Bloch Head of Technology Department F. Bordry Head of Beams Department P. Collier Head of Information Technology Department F. Hemmer CMS Collaboration Spokesperson G. Tonelli Project Coordinator of FP7 EuCARD J.-P. Koutchouk and CERN EU Projects Leader S. Stavrev. From left to right on CERN-HI-1104125 91: Head of the EU Delegation to the WTO A. Pangratis;General Director, DG Research and Innovation, European Commission R. J. Smits; CERN Director for Research and Scientific Computing S. Bertolucci; Head of International Relations F. Pauss; President of the European Commission J. M. Barroso;CERN Director-Genera...

  6. 42 CFR 405.874 - Appeals of CMS or a CMS contractor.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false Appeals of CMS or a CMS contractor. 405.874 Section... Part B Program § 405.874 Appeals of CMS or a CMS contractor. A CMS contractor's (that is, a carrier... supplier enrollment application. If CMS or a CMS contractor denies a provider's or supplier's...

  7. The grand descent has begun for CMS

    CERN Multimedia

    2006-01-01

    Until recently, the CMS experimental cavern looked relatively empty; its detector was assembled entirely at ground level, to be lowered underground in 15 sections. On 2 November, the first hadronic forward calorimeter led the way with a grand descent. The first section of the CMS detector (centre of photo) arriving from the vertical shaft, viewed from the cavern floor. There is something unusual about the construction of the CMS detector. Instead of being built in the experimental cavern, like all the other detectors in the LHC experiments, it was constructed at ground level. This was to allow for easy access during the assembly of the detector and to minimise the size of the excavated cavern. The slightly nerve-wracking task of lowering it safely into the cavern in separate sections came after the complete detector was successfully tested with a magnetic field at ground level. In the early morning of 2 November, the first section of the CMS detector began its eagerly awaited descent into the underground ca...

  8. 15th June 2009-His Excellency Mr Lech Kaczyński,President of the Republic of Poland,visiting CMS Experiment

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    Tirage 1;16-17:First Lady,H.E. M. KACZYŃSKA,President of the Republic of Poland,H.E. L. KACZYŃSKI with Technology Department,Machine Protection & Electrical Integrity Group Leader,A.Siemko Tirage 2;10:CMS Collaboration Spokesperson,T. Virdee with H.E. M. KACZYŃSKA,H.E. L. KACZYŃSKI and Coordinator for External Relations,F. Pauss visiting CMS experimental area Tirage 3:Representative of the French Republic,Sous-Préfet de Gex,Mr O. Laurens-Bernard and H.E. L. KACZYŃSKI Tirage 6 to 9:Signature of the Guest book with the Director-General,R. Heuer Tirage 11-12:the delegation visiting CMS experimental area Tirage 18-26:H.E. L. KACZYŃSKI with Polish scientists at CERN

  9. CMS computing upgrade and evolution

    CERN Document Server

    Hernandez Calama, Jose

    2013-01-01

    The distributed Grid computing infrastructure has been instrumental in the successful exploitation of the LHC data leading to the discovery of the Higgs boson. The computing system will need to face new challenges from 2015 on when LHC restarts with an anticipated higher detector output rate and event complexity, but with only a limited increase in the computing resources. A more efficient use of the available resources will be mandatory. CMS is improving the data storage, distribution and access as well as the processing efficiency. Remote access to the data through the WAN, dynamic data replication and deletion based on the data access patterns, and separation of disk and tape storage are some of the areas being actively developed. Multi-core processing and scheduling is being pursued in order to make a better use of the multi-core nodes available at the sites. In addition, CMS is exploring new computing techniques, such as Cloud Computing, to get access to opportunistic resources or as a means of using wit...

  10. 16 December 2013 - Hooke Professor of Experimental Physics and Pro Vice Chancellor University of Oxford Prof. I. Walmsley visiting the ATLAS cavern with ATLAS Collaboration Deputy Spokesperson T. Wengler, Physics Department, ATLAS Collaboration P. Wells and Chair, CMS Collaboration Board, Oxford University and Purdue University I. Shipsey

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    16 December 2013 - Hooke Professor of Experimental Physics and Pro Vice Chancellor University of Oxford Prof. I. Walmsley visiting the ATLAS cavern with ATLAS Collaboration Deputy Spokesperson T. Wengler, Physics Department, ATLAS Collaboration P. Wells and Chair, CMS Collaboration Board, Oxford University and Purdue University I. Shipsey

  11. 22 May 2013 - Turkish Minister of Health M. Müezzinoğlu signing the guest book with Director-General R. Heuer; in the LHC tunnel at Point 5 with International Relations Adviser E. Tsesmelis; in CMS experimental cavern with Deputy Spokesperson T. Camporesi. Turkish Scientists S. A. Cetin and B. Demirkoz present.

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    22 May 2013 - Turkish Minister of Health M. Müezzinoğlu signing the guest book with Director-General R. Heuer; in the LHC tunnel at Point 5 with International Relations Adviser E. Tsesmelis; in CMS experimental cavern with Deputy Spokesperson T. Camporesi. Turkish Scientists S. A. Cetin and B. Demirkoz present.

  12. 22. August 2013 - Permanent Representative of the Republic of Korea to the United Nations Office and other international organizations in Geneva, Ambassador Extraordinary and Plenipotentiary S. Choi signing the guest book with Director-General R. Heuer; visiting the LHC tunnel with P. Fessia and the CMS experimental cavern with Former Collaboration Spokesperson J. Virdee.

    CERN Multimedia

    Jean-Claude Gadmer

    2013-01-01

    22. August 2013 - Permanent Representative of the Republic of Korea to the United Nations Office and other international organizations in Geneva, Ambassador Extraordinary and Plenipotentiary S. Choi signing the guest book with Director-General R. Heuer; visiting the LHC tunnel with P. Fessia and the CMS experimental cavern with Former Collaboration Spokesperson J. Virdee.

  13. Recent results from CMS

    CERN Document Server

    CERN. Geneva

    2016-01-01

    With the increase in center-of-mass energy, a new energy frontier has been opened by the Large Hadron Collider. More than 25 fb^-1 of proton-proton collisions at sqrt(s)=13 TeV have been delivered to both ATLAS and CMS experiments during 2016. This enormous dataset can be used to test the Standard Model in a complete new regime with tremendous precision and it has the potential to unveil new physics or set strong bounds on it. In this talk some of the most recent results made public by the CMS Collaboration will be presented. The focus will mainly be on searches for physics beyond the Standard Model, with particular emphasis on searches for dark matter candidates.

  14. Higgs physics at CMS

    Science.gov (United States)

    Holzner, André G.

    2016-12-01

    This article reviews recent measurements of the properties of the standard model (SM) Higgs boson using data recorded with the CMS detector at the LHC: its mass, width and couplings to other SM particles. We also summarise highlights from searches for new physical phenomena in the Higgs sector as they are proposed in many extensions of the SM: flavour violating and invisible decay modes, resonances decaying into Higgs bosons and searches for additional Higgs bosons.

  15. CMS lead tungstate crystals

    CERN Multimedia

    Laurent Guiraud

    2000-01-01

    These crystals are made from lead tungstate, a crystal that is as clear as glass yet with nearly four times the density. They have been produced in Russia to be used as scintillators in the electromagnetic calorimeter on the CMS experiment, part of the LHC project at CERN. When an electron, positron or photon passes through the calorimeter it will cause a cascade of particles that will then be absorbed by these scintillating crystals, allowing the particle's energy to be measured.

  16. Content management systems (CMS)

    OpenAIRE

    Oriahi, Harrison

    2014-01-01

    This thesis describes the three most common and widely used content management systems (CMS) used to power several millions of business websites on the internet. Since there are many other content managements systems online, this report provides some helpful guides on each of the three most used systems and the web design projects that each of them maybe most suitable. There are plenty of options when it comes to selecting a content management system for a development project and this the...

  17. CMS central barrel yoke

    CERN Multimedia

    Maximilien Brice

    2002-01-01

    The CMS experiment at CERN will use a massive solenoid housed within this return yoke, which will weigh 12 500 tonnes when completed. Magnetic fields generated within this structure will reach levels greater than any other magnet of this kind and will store enough energy to melt 18 tonnes of gold. Within the yoke is positioned the external vacuum chamber into which the solenoid will be placed.

  18. Dibosons from CMS

    Directory of Open Access Journals (Sweden)

    Martelli Arabella

    2012-06-01

    Full Text Available It is here presented the diboson production cross section measured by the CMS collaboration in pp collisions data at √s = 7 TeV. Wγ and Zγ results from 2010 analyses (36 pb−1 are presented together with 2011 first measurements of WW, WZ and ZZ final states obtained using 1.1 fb−1. Results obtained with 2010 data are also interpreted in term of anomalous triple gauge couplings.

  19. The CMS COLD BOX

    CERN Multimedia

    Brice, Maximilien

    2015-01-01

    The CMS detector is built around a large solenoid magnet. This takes the form of a cylindrical coil of superconducting cable that generates a field of 3.8 Tesla: about 100,000 times the magnetic field of the Earth. To run, this superconducting magnet needs to be cooled down to very low temperature with liquid helium. Providing this is the job of a compressor station and the so-called “cold box”.

  20. The CMS conductor

    CERN Document Server

    Horváth, I L; Marti, H P; Neuenschwander, J; Smith, R P; Fabbricatore, P; Musenich, R; Calvo, A; Campi, D; Curé, B; Desirelli, Alberto; Favre, G; Riboni, P L; Sgobba, Stefano; Tardy, T; Sequeira-Lopes-Tavares, S

    2000-01-01

    The Compact Muon Solenoid (CMS) is one of the experiments, which are being designed in the framework of the Large Hadron Collider (LHC) project at CERN, the design field of the CMS magnet is 4 T, the magnetic length is 13 m and the aperture is 6 m. This high magnetic field is achieved by means of a 4 layer, 5 modules superconducting coil. The coil is wound from an Al-stabilized Rutherford type conductor. The nominal current of the magnet is 20 kA at 4.5 K. In the CMS coil the structural function is ensured, unlike in other existing Al-stabilized thin solenoids, both by the Al-alloy reinforced conductor and the external former. In this paper the retained manufacturing process of the 50-km long reinforced conductor is described. In general the Rutherford type cable is surrounded by high purity aluminium in a continuous co-extrusion process to produce the Insert. Thereafter the reinforcement is joined by Electron Beam Welding to the pure Al of the insert, before being machined to the final dimensions. During the...

  1. CMS Industries awarded gold, crystal

    CERN Multimedia

    2006-01-01

    The CMS collaboration honoured 10 of its top suppliers in the seventh annual awards ceremony The representatives of the firms that recieved the CMS Gold and Crystal Awards stand with their awards after the ceremony. The seventh annual CMS Awards ceremony was held on Monday 13 March to recognize the industries that have made substantial contributions to the construction of the collaboration's detector. Nine international firms received Gold Awards, and General Tecnica of Italy received the prestigious Crystal Award. Representatives from the companies attended the ceremony during the plenary session of CMS week. 'The role of CERN, its machines and experiments, beyond particle physics is to push the development of equipment technologies related to high-energy physics,'said CMS Awards Coordinator Domenico Campi. 'All of these industries must go beyond the technologies that are currently available.' Without the involvement of good companies over the years, the construction of the CMS detector wouldn't be possible...

  2. 4th February 2011 - Austrian Academy of Sciences President H. Denk visiting CMS underground area with Collaboration Spokesperson G. Tonelli, Austrian Academy of Sciences Secretary General A. Suppan, CERN Head of International Relations F. Pauss and Director, High Energy Physics Laboratory, Austrian Academy of Sciences C Fabjan.

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    4th February 2011 - Austrian Academy of Sciences President H. Denk visiting CMS underground area with Collaboration Spokesperson G. Tonelli, Austrian Academy of Sciences Secretary General A. Suppan, CERN Head of International Relations F. Pauss and Director, High Energy Physics Laboratory, Austrian Academy of Sciences C Fabjan.

  3. Status of RDMS CMS computing

    Science.gov (United States)

    Gavrilov, V.; Golutvin, I.; Kodolova, O.; Korenkov, V.; Levchuk, L.; Shmatov, S.; Tikhonenko, E.; Zhiltsov, V.

    2016-09-01

    The Compact Muon Solenoid (CMS) is a high-performance general-purpose detector at the Large Hadron Collider (LHC) at CERN. More than twenty institutes from Russia and Joint Institute for Nuclear Research (JINR) are involved in Russia and Dubna Member States (RDMS) CMS Collaboration. A proper computing grid-infrastructure has been constructed at the RDMS institutes for the participation in the running phase of the CMS experiment. Current status of RDMS CMS computing and plans of its development to the next LHC start are presented.

  4. SUSY Searches: Recent Results from ATLAS & CMS

    CERN Document Server

    Rammensee, Michael; The ATLAS collaboration

    2015-01-01

    Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. This talk summarises recent ATLAS and CMS results for searches for supersymmetric (SUSY) particles. Weak and strong production in both R-Parity conserving and R-Parity violating SUSY scenarios are considered. The searches involved final states including jets, missing transverse momentum, light leptons, taus or photons, as well as long-lived particle signatures.

  5. Study of HH production at CMS

    CERN Document Server

    Francois, Brieuc Arnaud L

    2016-01-01

    The production of a pair of Higgs bosons provides a direct handle on the structure of the Higgs field potential. While the HH production within the SM is very small and essentially out of the experimental reach within the LHC Run I or II, several beyond SM theories foresee an enhancement that can be already probed with the available data. First searches for resonant and non-resonant Higgs pair production made using CMS Run II data will be presented.

  6. Researchers Night in Portugal, featuring CMS Virtual Visit

    CERN Multimedia

    Lisbon, Portugal

    2016-01-01

    Highlights from European Researchers Night in the Planetarium Calouste Gulbenkian - Ciência Viva Centre. Organised by researchers from LIP (Laboratório de Instrumentação e Física Experimental de Partículas) and including CMS Virtual Visit. During that night, André David Tinoco Mendez and José Rasteiro da Silva, based at Cessy (France) - home of the CMS detector, discussed scientific challenges with audience in Lisbon.

  7. CMS celebrates the lowering of its final detector element

    CERN Multimedia

    2008-01-01

    In the early hours of the morning the final element of the Compact Muon Solenoid (CMS) detector began the descent into its underground experimental cavern in preparation for the start-up of CERN's Large Hadron Collider (LHC) this summer. This is a pivotal moment for the CMS collaboration, as the experiment is the first of its kind to be constructed above ground and then lowered, element by element, 100 metres below.

  8. QCD Physics (CMS)

    CERN Document Server

    Cerci, Salim

    2016-01-01

    Jets which are the signatures of quarks and gluons in the detector can be described by Quantum Chromodynamics (QCD) in terms of parton-parton scattering. Jets are abundantly produced at the LHC's high energy scales. Measurements of inclusive jets, dijets and multijets can be used to test perturbative QCD predictions and to constrain parton distribution functions (PDF), as well as to measure the strong coupling constant $\\alpha_{S}$. The measurements use the samples of proton-proton collisions collected with the CMS detector at the LHC at various center-of-mass energies of 7, 8 and 13 TeV.

  9. CMS silicon tracker developments

    Energy Technology Data Exchange (ETDEWEB)

    Civinini, C. E-mail: carlo.civinini@fi.infn.it; Albergo, S.; Angarano, M.; Azzi, P.; Babucci, E.; Bacchetta, N.; Bader, A.; Bagliesi, G.; Basti, A.; Biggeri, U.; Bilei, G.M.; Bisello, D.; Boemi, D.; Bosi, F.; Borrello, L.; Bozzi, C.; Braibant, S.; Breuker, H.; Bruzzi, M.; Buffini, A.; Busoni, S.; Candelori, A.; Caner, A.; Castaldi, R.; Castro, A.; Catacchini, E.; Checcucci, B.; Ciampolini, P.; Creanza, D.; D' Alessandro, R.; Da Rold, M.; Demaria, N.; De Palma, M.; Dell' Orso, R.; Della Marina, R.D.R.; Dutta, S.; Eklund, C.; Feld, L.; Fiore, L.; Focardi, E.; French, M.; Freudenreich, K.; Frey, A.; Fuertjes, A.; Giassi, A.; Giorgi, M.; Giraldo, A.; Glessing, B.; Gu, W.H.; Hall, G.; Hammarstrom, R.; Hebbeker, T.; Honma, A.; Hrubec, J.; Huhtinen, M.; Kaminsky, A.; Karimaki, V.; Koenig, St.; Krammer, M.; Lariccia, P.; Lenzi, M.; Loreti, M.; Luebelsmeyer, K.; Lustermann, W.; Maettig, P.; Maggi, G.; Mannelli, M.; Mantovani, G.; Marchioro, A.; Mariotti, C.; Martignon, G.; Evoy, B. Mc; Meschini, M.; Messineo, A.; Migliore, E.; My, S.; Paccagnella, A.; Palla, F.; Pandoulas, D.; Papi, A.; Parrini, G.; Passeri, D.; Pieri, M.; Piperov, S.; Potenza, R.; Radicci, V.; Raffaelli, F.; Raymond, M.; Santocchia, A.; Schmitt, B.; Selvaggi, G.; Servoli, L.; Sguazzoni, G.; Siedling, R.; Silvestris, L.; Starodumov, A.; Stavitski, I.; Stefanini, G.; Surrow, B.; Tempesta, P.; Tonelli, G.; Tricomi, A.; Tuuva, T.; Vannini, C.; Verdini, P.G.; Viertel, G.; Xie, Z.; Yahong, Li; Watts, S.; Wittmer, B

    2002-01-21

    The CMS Silicon tracker consists of 70 m{sup 2} of microstrip sensors which design will be finalized at the end of 1999 on the basis of systematic studies of device characteristics as function of the most important parameters. A fundamental constraint comes from the fact that the detector has to be operated in a very hostile radiation environment with full efficiency. We present an overview of the current results and prospects for converging on a final set of parameters for the silicon tracker sensors.

  10. CMS silicon tracker developments

    CERN Document Server

    Civinini, C; Angarano, M M; Azzi, P; Babucci, E; Bacchetta, N; Bader, A; Bagliesi, G; Basti, A; Biggeri, U; Bilei, G M; Bisello, D; Boemi, D; Bosi, F; Borrello, L; Bozzi, C; Braibant, S; Breuker, Horst; Bruzzi, Mara; Buffini, A; Busoni, S; Candelori, A; Caner, A; Castaldi, R; Castro, A; Catacchini, E; Checcucci, B; Ciampolini, P; Creanza, D; D'Alessandro, R; Da Rold, M; Demaria, N; De Palma, M; Dell'Orso, R; Della Marina, R; Dutta, S; Eklund, C; Feld, L; Fiore, L; Focardi, E; French, M; Freudenreich, Klaus; Frey, A; Fürtjes, A; Giassi, A; Giorgi, M; Giraldo, A; Glessing, B; Gu, W H; Hall, G; Hammarström, R; Hebbeker, T; Honma, A; Hrubec, Josef; Huhtinen, M; Kaminski, A; Karimäki, V; König, S; Krammer, Manfred; Lariccia, P; Lenzi, M; Loreti, M; Lübelsmeyer, K; Lustermann, W; Mättig, P; Maggi, G; Mannelli, M; Mantovani, G C; Marchioro, A; Mariotti, C; Martignon, G; McEvoy, B; Meschini, M; Messineo, A; Migliore, E; My, S; Paccagnella, A; Palla, Fabrizio; Pandoulas, D; Papi, A; Parrini, G; Passeri, D; Pieri, M; Piperov, S; Potenza, R; Radicci, V; Raffaelli, F; Raymond, M; Santocchia, A; Schmitt, B; Selvaggi, G; Servoli, L; Sguazzoni, G; Siedling, R; Silvestris, L; Starodumov, Andrei; Stavitski, I; Stefanini, G; Surrow, B; Tempesta, P; Tonelli, G; Tricomi, A; Tuuva, T; Vannini, C; Verdini, P G; Viertel, Gert M; Xie, Z; Li Ya Hong; Watts, S; Wittmer, B

    2002-01-01

    The CMS Silicon tracker consists of 70 m/sup 2/ of microstrip sensors which design will be finalized at the end of 1999 on the basis of systematic studies of device characteristics as function of the most important parameters. A fundamental constraint comes from the fact that the detector has to be operated in a very hostile radiation environment with full efficiency. We present an overview of the current results and prospects for converging on a final set of parameters for the silicon tracker sensors. (9 refs).

  11. Recent results from CMS

    CERN Document Server

    Dordevic, Milos

    2016-01-01

    The highlights of the most recent CMS results with 13 TeV data will be presented in this overview. The Standard Model precision measurements, including the top quark production, will be shown first. This will be followed by the presentation of Higgs boson studies with the early 13 TeV data. Then the focus will shift to searches for physics beyond the Standard Model, including the searches for several Supersymmetric scenarios, using different analysis techniques. The talk will conclude with searches for the exotic resonances, with an emphasis on studies of the high-mass diphoton production.

  12. Top Physics (CMS)

    CERN Document Server

    Daskalakis, Georgios

    2016-01-01

    Recent results on the inclusive and differential production cross sections of top-quark pair and single top-quark processes are presented, obtained using data from proton-proton collisions collected with the CMS detector at the LHC. The large centre-of-mass energies available at LHC allow for the copious production of top-quark pairs in association with other final state particles at high transverse momentum. Measurements of such processes as well as of the top-quark mass and other properties will be discussed. The results are compared with the most up-to-date standard model theory predictions.

  13. The CMS trigger system

    Energy Technology Data Exchange (ETDEWEB)

    Khachatryan, Vardan; et al.

    2016-09-08

    This paper describes the CMS trigger system and its performance during Run 1 of the LHC. The trigger system consists of two levels designed to select events of potential physics interest from a GHz (MHz) interaction rate of proton-proton (heavy ion) collisions. The first level of the trigger is implemented in hardware, and selects events containing detector signals consistent with an electron, photon, muon, tau lepton, jet, or missing transverse energy. A programmable menu of up to 128 object-based algorithms is used to select events for subsequent processing. The trigger thresholds are adjusted to the LHC instantaneous luminosity during data taking in order to restrict the output rate to 100 kHz, the upper limit imposed by the CMS readout electronics. The second level, implemented in software, further refines the purity of the output stream, selecting an average rate of 400 Hz for offline event storage. The objectives, strategy and performance of the trigger system during the LHC Run 1 are described.

  14. The CMS trigger system

    CERN Document Server

    Khachatryan, Vardan; Tumasyan, Armen; Adam, Wolfgang; Aşılar, Ece; Bergauer, Thomas; Brandstetter, Johannes; Brondolin, Erica; Dragicevic, Marko; Erö, Janos; Flechl, Martin; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hartl, Christian; Hörmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Knünz, Valentin; König, Axel; Krammer, Manfred; Krätschmer, Ilse; Liko, Dietrich; Matsushita, Takashi; Mikulec, Ivan; Rabady, Dinyar; Rahbaran, Babak; Rohringer, Herbert; Schieck, Jochen; Schöfbeck, Robert; Strauss, Josef; Treberer-Treberspurg, Wolfgang; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Alderweireldt, Sara; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Knutsson, Albert; Lauwers, Jasper; Luyckx, Sten; Van De Klundert, Merijn; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Abu Zeid, Shimaa; Blekman, Freya; D'Hondt, Jorgen; Daci, Nadir; De Bruyn, Isabelle; Deroover, Kevin; Heracleous, Natalie; Keaveney, James; Lowette, Steven; Moreels, Lieselotte; Olbrechts, Annik; Python, Quentin; Strom, Derek; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Van Parijs, Isis; Barria, Patrizia; Brun, Hugues; Caillol, Cécile; Clerbaux, Barbara; De Lentdecker, Gilles; Fasanella, Giuseppe; Favart, Laurent; Grebenyuk, Anastasia; Karapostoli, Georgia; Lenzi, Thomas; Léonard, Alexandre; Maerschalk, Thierry; Marinov, Andrey; Perniè, Luca; Randle-conde, Aidan; Reis, Thomas; Seva, Tomislav; Vander Velde, Catherine; Vanlaer, Pascal; Yonamine, Ryo; Zenoni, Florian; Zhang, Fengwangdong; Beernaert, Kelly; Benucci, Leonardo; Cimmino, Anna; Crucy, Shannon; Dobur, Didar; Fagot, Alexis; Garcia, Guillaume; Gul, Muhammad; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Poyraz, Deniz; Ryckbosch, Dirk; Salva Diblen, Sinem; Sigamani, Michael; Strobbe, Nadja; Tytgat, Michael; Van Driessche, Ward; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Beluffi, Camille; Bondu, Olivier; Brochet, Sébastien; Bruno, Giacomo; Caudron, Adrien; Ceard, Ludivine; Da Silveira, Gustavo Gil; Delaere, Christophe; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Jafari, Abideh; Jez, Pavel; Komm, Matthias; Lemaitre, Vincent; Mertens, Alexandre; Musich, Marco; Nuttens, Claude; Perrini, Lucia; Pin, Arnaud; Piotrzkowski, Krzysztof; Popov, Andrey; Quertenmont, Loic; Selvaggi, Michele; Vidal Marono, Miguel; Beliy, Nikita; Hammad, Gregory Habib; Aldá Júnior, Walter Luiz; Alves, Fábio Lúcio; Alves, Gilvan; Brito, Lucas; Correa Martins Junior, Marcos; Hamer, Matthias; Hensel, Carsten; Mora Herrera, Clemencia; Moraes, Arthur; Pol, Maria Elena; Rebello Teles, Patricia; Belchior Batista Das Chagas, Ewerton; Carvalho, Wagner; Chinellato, Jose; Custódio, Analu; Melo Da Costa, Eliza; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Huertas Guativa, Lina Milena; Malbouisson, Helena; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santoro, Alberto; Sznajder, Andre; Tonelli Manganote, Edmilson José; Vilela Pereira, Antonio; Ahuja, Sudha; Bernardes, Cesar Augusto; De Souza Santos, Angelo; Dogra, Sunil; Tomei, Thiago; De Moraes Gregores, Eduardo; Mercadante, Pedro G; Moon, Chang-Seong; Novaes, Sergio F; Padula, Sandra; Romero Abad, David; Ruiz Vargas, José Cupertino; Aleksandrov, Aleksandar; Hadjiiska, Roumyana; Iaydjiev, Plamen; Rodozov, Mircho; Stoykova, Stefka; Sultanov, Georgi; Vutova, Mariana; Dimitrov, Anton; Glushkov, Ivan; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Ahmad, Muhammad; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Chen, Mingshui; Cheng, Tongguang; Du, Ran; Jiang, Chun-Hua; Plestina, Roko; Romeo, Francesco; Shaheen, Sarmad Masood; Spiezia, Aniello; Tao, Junquan; Wang, Chunjie; Wang, Zheng; Zhang, Huaqiao; Asawatangtrakuldee, Chayanit; Ban, Yong; Li, Qiang; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Wang, Dayong; Xu, Zijun; Avila, Carlos; Cabrera, Andrés; Chaparro Sierra, Luisa Fernanda; Florez, Carlos; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Puljak, Ivica; Ribeiro Cipriano, Pedro M; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Kadija, Kreso; Luetic, Jelena; Micanovic, Sasa; Sudic, Lucija; Attikis, Alexandros; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Rykaczewski, Hans; Bodlak, Martin; Finger, Miroslav; Finger Jr, Michael; Assran, Yasser; El Sawy, Mai; Elgammal, Sherif; Ellithi Kamel, Ali; Mahmoud, Mohammed; Calpas, Betty; Kadastik, Mario; Murumaa, Marion; Raidal, Martti; Tiko, Andres; Veelken, Christian; Eerola, Paula; Pekkanen, Juska; Voutilainen, Mikko; Härkönen, Jaakko; Karimäki, Veikko; Kinnunen, Ritva; Lampén, Tapio; Lassila-Perini, Kati; Lehti, Sami; Lindén, Tomas; Luukka, Panja-Riina; Mäenpää, Teppo; Peltola, Timo; Tuominen, Eija; Tuominiemi, Jorma; Tuovinen, Esa; Wendland, Lauri; Talvitie, Joonas; Tuuva, Tuure; Besancon, Marc; Couderc, Fabrice; Dejardin, Marc; Denegri, Daniel; Fabbro, Bernard; Faure, Jean-Louis; Favaro, Carlotta; Ferri, Federico; Ganjour, Serguei; Givernaud, Alain; Gras, Philippe; Hamel de Monchenault, Gautier; Jarry, Patrick; Locci, Elizabeth; Machet, Martina; Malcles, Julie; Rander, John; Rosowsky, André; Titov, Maksym; Zghiche, Amina; Antropov, Iurii; Baffioni, Stephanie; Beaudette, Florian; Busson, Philippe; Cadamuro, Luca; Chapon, Emilien; Charlot, Claude; Dahms, Torsten; Davignon, Olivier; Filipovic, Nicolas; Florent, Alice; Granier de Cassagnac, Raphael; Lisniak, Stanislav; Mastrolorenzo, Luca; Miné, Philippe; Naranjo, Ivo Nicolas; Nguyen, Matthew; Ochando, Christophe; Ortona, Giacomo; Paganini, Pascal; Pigard, Philipp; Regnard, Simon; Salerno, Roberto; Sauvan, Jean-Baptiste; Sirois, Yves; Strebler, Thomas; Yilmaz, Yetkin; Zabi, Alexandre; Agram, Jean-Laurent; Andrea, Jeremy; Aubin, Alexandre; Bloch, Daniel; Brom, Jean-Marie; Buttignol, Michael; Chabert, Eric Christian; Chanon, Nicolas; Collard, Caroline; Conte, Eric; Coubez, Xavier; Fontaine, Jean-Charles; Gelé, Denis; Goerlach, Ulrich; Goetzmann, Christophe; Le Bihan, Anne-Catherine; Merlin, Jeremie Alexandre; Skovpen, Kirill; Van Hove, Pierre; Gadrat, Sébastien; Beauceron, Stephanie; Bernet, Colin; Boudoul, Gaelle; Bouvier, Elvire; Carrillo Montoya, Camilo Andres; Chierici, Roberto; Contardo, Didier; Courbon, Benoit; Depasse, Pierre; El Mamouni, Houmani; Fan, Jiawei; Fay, Jean; Gascon, Susan; Gouzevitch, Maxime; Ille, Bernard; Lagarde, Francois; Laktineh, Imad Baptiste; Lethuillier, Morgan; Mirabito, Laurent; Pequegnot, Anne-Laure; Perries, Stephane; Ruiz Alvarez, José David; Sabes, David; Sgandurra, Louis; Sordini, Viola; Vander Donckt, Muriel; Verdier, Patrice; Viret, Sébastien; Toriashvili, Tengizi; Tsamalaidze, Zviad; Autermann, Christian; Beranek, Sarah; Edelhoff, Matthias; Feld, Lutz; Heister, Arno; Kiesel, Maximilian Knut; Klein, Katja; Lipinski, Martin; Ostapchuk, Andrey; Preuten, Marius; Raupach, Frank; Schael, Stefan; Schulte, Jan-Frederik; Verlage, Tobias; Weber, Hendrik; Wittmer, Bruno; Zhukov, Valery; Ata, Metin; Brodski, Michael; Dietz-Laursonn, Erik; Duchardt, Deborah; Endres, Matthias; Erdmann, Martin; Erdweg, Sören; Esch, Thomas; Fischer, Robert; Güth, Andreas; Hebbeker, Thomas; Heidemann, Carsten; Hoepfner, Kerstin; Klingebiel, Dennis; Knutzen, Simon; Kreuzer, Peter; Merschmeyer, Markus; Meyer, Arnd; Millet, Philipp; Olschewski, Mark; Padeken, Klaas; Papacz, Paul; Pook, Tobias; Radziej, Markus; Reithler, Hans; Rieger, Marcel; Scheuch, Florian; Sonnenschein, Lars; Teyssier, Daniel; Thüer, Sebastian; Cherepanov, Vladimir; Erdogan, Yusuf; Flügge, Günter; Geenen, Heiko; Geisler, Matthias; Hoehle, Felix; Kargoll, Bastian; Kress, Thomas; Kuessel, Yvonne; Künsken, Andreas; Lingemann, Joschka; Nehrkorn, Alexander; Nowack, Andreas; Nugent, Ian Michael; Pistone, Claudia; Pooth, Oliver; Stahl, Achim; Aldaya Martin, Maria; Asin, Ivan; Bartosik, Nazar; Behnke, Olaf; Behrens, Ulf; Bell, Alan James; Borras, Kerstin; Burgmeier, Armin; Campbell, Alan; Choudhury, Somnath; Costanza, Francesco; Diez Pardos, Carmen; Dolinska, Ganna; Dooling, Samantha; Dorland, Tyler; Eckerlin, Guenter; Eckstein, Doris; Eichhorn, Thomas; Flucke, Gero; Gallo, Elisabetta; Garay Garcia, Jasone; Geiser, Achim; Gizhko, Andrii; Gunnellini, Paolo; Hauk, Johannes; Hempel, Maria; Jung, Hannes; Kalogeropoulos, Alexis; Karacheban, Olena; Kasemann, Matthias; Katsas, Panagiotis; Kieseler, Jan; Kleinwort, Claus; Korol, Ievgen; Lange, Wolfgang; Leonard, Jessica; Lipka, Katerina; Lobanov, Artur; Lohmann, Wolfgang; Mankel, Rainer; Marfin, Ihar; Melzer-Pellmann, Isabell-Alissandra; Meyer, Andreas Bernhard; Mittag, Gregor; Mnich, Joachim; Mussgiller, Andreas; Naumann-Emme, Sebastian; Nayak, Aruna; Ntomari, Eleni; Perrey, Hanno; Pitzl, Daniel; Placakyte, Ringaile; Raspereza, Alexei; Roland, Benoit; Sahin, Mehmet Özgür; Saxena, Pooja; Schoerner-Sadenius, Thomas; Schröder, Matthias; Seitz, Claudia; Spannagel, Simon; Trippkewitz, Karim Damun; Walsh, Roberval; Wissing, Christoph; Blobel, Volker; Centis Vignali, Matteo; Draeger, Arne-Rasmus; Erfle, Joachim; Garutti, Erika; Goebel, Kristin; Gonzalez, Daniel; Görner, Martin; Haller, Johannes; Hoffmann, Malte; Höing, Rebekka Sophie; Junkes, Alexandra; Klanner, Robert; Kogler, Roman; Kovalchuk, Nataliia; Lapsien, Tobias; Lenz, Teresa; Marchesini, Ivan; Marconi, Daniele; Meyer, Mareike; Nowatschin, Dominik; Ott, Jochen; Pantaleo, Felice; Peiffer, Thomas; Perieanu, Adrian; Pietsch, Niklas; Poehlsen, Jennifer; Rathjens, Denis; Sander, Christian; Scharf, Christian; Schettler, Hannes; Schleper, Peter; Schlieckau, Eike; Schmidt, Alexander; Schwandt, Joern; Sola, Valentina; Stadie, Hartmut; Steinbrück, Georg; Tholen, Heiner; Troendle, Daniel; Usai, Emanuele; Vanelderen, Lukas; Vanhoefer, Annika; Vormwald, Benedikt; Akbiyik, Melike; Barth, Christian; Baus, Colin; Berger, Joram; Böser, Christian; Butz, Erik; Chwalek, Thorsten; Colombo, Fabio; De Boer, Wim; Descroix, Alexis; Dierlamm, Alexander; Fink, Simon; Frensch, Felix; Friese, Raphael; Giffels, Manuel; Gilbert, Andrew; Haitz, Dominik; Hartmann, Frank; Heindl, Stefan Michael; Husemann, Ulrich; Katkov, Igor; Kornmayer, Andreas; Lobelle Pardo, Patricia; Maier, Benedikt; Mildner, Hannes; Mozer, Matthias Ulrich; Müller, Thomas; Müller, Thomas; Plagge, Michael; Quast, Gunter; Rabbertz, Klaus; Röcker, Steffen; Roscher, Frank; Sieber, Georg; Simonis, Hans-Jürgen; Stober, Fred-Markus Helmut; Ulrich, Ralf; Wagner-Kuhr, Jeannine; Wayand, Stefan; Weber, Marc; Weiler, Thomas; Wöhrmann, Clemens; Wolf, Roger; Anagnostou, Georgios; Daskalakis, Georgios; Geralis, Theodoros; Giakoumopoulou, Viktoria Athina; Kyriakis, Aristotelis; Loukas, Demetrios; Psallidas, Andreas; Topsis-Giotis, Iasonas; Agapitos, Antonis; Kesisoglou, Stilianos; Panagiotou, Apostolos; Saoulidou, Niki; Tziaferi, Eirini; Evangelou, Ioannis; Flouris, Giannis; Foudas, Costas; Kokkas, Panagiotis; Loukas, Nikitas; Manthos, Nikolaos; Papadopoulos, Ioannis; Paradas, Evangelos; Strologas, John; Bencze, Gyorgy; Hajdu, Csaba; Hazi, Andras; Hidas, Pàl; Horvath, Dezso; Sikler, Ferenc; Veszpremi, Viktor; Vesztergombi, Gyorgy; Zsigmond, Anna Julia; Beni, Noemi; Czellar, Sandor; Karancsi, János; Molnar, Jozsef; Szillasi, Zoltan; Bartók, Márton; Makovec, Alajos; Raics, Peter; Trocsanyi, Zoltan Laszlo; Ujvari, Balazs; Mal, Prolay; Mandal, Koushik; Sahoo, Deepak Kumar; Sahoo, Niladribihari; Swain, Sanjay Kumar; Bansal, Sunil; Beri, Suman Bala; Bhatnagar, Vipin; Chawla, Ridhi; Gupta, Ruchi; Bhawandeep, Bhawandeep; Kalsi, Amandeep Kaur; Kaur, Anterpreet; Kaur, Manjit; Kumar, Ramandeep; Mehta, Ankita; Mittal, Monika; Singh, Jasbir; Walia, Genius; Kumar, Ashok; Bhardwaj, Ashutosh; Choudhary, Brajesh C; Garg, Rocky Bala; Kumar, Ajay; Malhotra, Shivali; Naimuddin, Md; Nishu, Nishu; Ranjan, Kirti; Sharma, Ramkrishna; Sharma, Varun; Bhattacharya, Satyaki; Chatterjee, Kalyanmoy; Dey, Sourav; Dutta, Suchandra; Jain, Sandhya; Majumdar, Nayana; Modak, Atanu; Mondal, Kuntal; Mukherjee, Swagata; Mukhopadhyay, Supratik; Roy, Ashim; Roy, Debarati; Roy Chowdhury, Suvankar; Sarkar, Subir; Sharan, Manoj; Abdulsalam, Abdulla; Chudasama, Ruchi; Dutta, Dipanwita; Jha, Vishwajeet; Kumar, Vineet; Mohanty, Ajit Kumar; Pant, Lalit Mohan; Shukla, Prashant; Topkar, Anita; Aziz, Tariq; Banerjee, Sudeshna; Bhowmik, Sandeep; Chatterjee, Rajdeep Mohan; Dewanjee, Ram Krishna; Dugad, Shashikant; Ganguly, Sanmay; Ghosh, Saranya; Guchait, Monoranjan; Gurtu, Atul; Kole, Gouranga; Kumar, Sanjeev; Mahakud, Bibhuprasad; Maity, Manas; Majumder, Gobinda; Mazumdar, Kajari; Mitra, Soureek; Mohanty, Gagan Bihari; Parida, Bibhuti; Sarkar, Tanmay; Sur, Nairit; Sutar, Bajrang; Wickramage, Nadeesha; Chauhan, Shubhanshu; Dube, Sourabh; Kothekar, Kunal; Sharma, Seema; Bakhshiansohi, Hamed; Behnamian, Hadi; Etesami, Seyed Mohsen; Fahim, Ali; Goldouzian, Reza; Khakzad, Mohsen; Mohammadi Najafabadi, Mojtaba; Naseri, Mohsen; Paktinat Mehdiabadi, Saeid; Rezaei Hosseinabadi, Ferdos; Safarzadeh, Batool; Zeinali, Maryam; Felcini, Marta; Grunewald, Martin; Abbrescia, Marcello; Calabria, Cesare; Caputo, Claudio; Colaleo, Anna; Creanza, Donato; Cristella, Leonardo; De Filippis, Nicola; De Palma, Mauro; Fiore, Luigi; Iaselli, Giuseppe; Maggi, Giorgio; Maggi, Marcello; Miniello, Giorgia; My, Salvatore; Nuzzo, Salvatore; Pompili, Alexis; Pugliese, Gabriella; Radogna, Raffaella; Ranieri, Antonio; Selvaggi, Giovanna; Silvestris, Lucia; Venditti, Rosamaria; Verwilligen, Piet; Abbiendi, Giovanni; Battilana, Carlo; Benvenuti, Alberto; Bonacorsi, Daniele; Braibant-Giacomelli, Sylvie; Brigliadori, Luca; Campanini, Renato; Capiluppi, Paolo; Castro, Andrea; Cavallo, Francesca Romana; Chhibra, Simranjit Singh; Codispoti, Giuseppe; Cuffiani, Marco; Dallavalle, Gaetano-Marco; Fabbri, Fabrizio; Fanfani, Alessandra; Fasanella, Daniele; Giacomelli, Paolo; Grandi, Claudio; Guiducci, Luigi; Marcellini, Stefano; Masetti, Gianni; Montanari, Alessandro; Navarria, Francesco; Perrotta, Andrea; Rossi, Antonio; Rovelli, Tiziano; Siroli, Gian Piero; Tosi, Nicolò; Travaglini, Riccardo; Cappello, Gigi; Chiorboli, Massimiliano; Costa, Salvatore; Di Mattia, Alessandro; Giordano, Ferdinando; Potenza, Renato; Tricomi, Alessia; Tuve, Cristina; Barbagli, Giuseppe; Ciulli, Vitaliano; Civinini, Carlo; D'Alessandro, Raffaello; Focardi, Ettore; Gonzi, Sandro; Gori, Valentina; Lenzi, Piergiulio; Meschini, Marco; Paoletti, Simone; Sguazzoni, Giacomo; Tropiano, Antonio; Viliani, Lorenzo; Benussi, Luigi; Bianco, Stefano; Fabbri, Franco; Piccolo, Davide; Primavera, Federica; Calvelli, Valerio; Ferro, Fabrizio; Lo Vetere, Maurizio; Monge, Maria Roberta; Robutti, Enrico; Tosi, Silvano; Brianza, Luca; Dinardo, Mauro Emanuele; Fiorendi, Sara; Gennai, Simone; Gerosa, Raffaele; Ghezzi, Alessio; Govoni, Pietro; Malvezzi, Sandra; Manzoni, Riccardo Andrea; Marzocchi, Badder; Menasce, Dario; Moroni, Luigi; Paganoni, Marco; Pedrini, Daniele; Ragazzi, Stefano; Redaelli, Nicola; Tabarelli de Fatis, Tommaso; Buontempo, Salvatore; Cavallo, Nicola; Di Guida, Salvatore; Esposito, Marco; Fabozzi, Francesco; Iorio, Alberto Orso Maria; Lanza, Giuseppe; Lista, Luca; Meola, Sabino; Merola, Mario; Paolucci, Pierluigi; Sciacca, Crisostomo; Thyssen, Filip; Bacchetta, Nicola; Bellato, Marco; Benato, Lisa; Bisello, Dario; Boletti, Alessio; Carlin, Roberto; Checchia, Paolo; Dall'Osso, Martino; Dosselli, Umberto; Gasparini, Fabrizio; Gasparini, Ugo; Gozzelino, Andrea; Lacaprara, Stefano; Margoni, Martino; Meneguzzo, Anna Teresa; Montecassiano, Fabio; Passaseo, Marina; Pazzini, Jacopo; Pegoraro, Matteo; Pozzobon, Nicola; Simonetto, Franco; Torassa, Ezio; Tosi, Mia; Vanini, Sara; Ventura, Sandro; Zanetti, Marco; Zotto, Pierluigi; Zucchetta, Alberto; Zumerle, Gianni; Braghieri, Alessandro; Magnani, Alice; Montagna, Paolo; Ratti, Sergio P; Re, Valerio; Riccardi, Cristina; Salvini, Paola; Vai, Ilaria; Vitulo, Paolo; Alunni Solestizi, Luisa; Biasini, Maurizio; Bilei, Gian Mario; Ciangottini, Diego; Fanò, Livio; Lariccia, Paolo; Mantovani, Giancarlo; Menichelli, Mauro; Saha, Anirban; Santocchia, Attilio; Androsov, Konstantin; Azzurri, Paolo; Bagliesi, Giuseppe; Bernardini, Jacopo; Boccali, Tommaso; Castaldi, Rino; Ciocci, Maria Agnese; Dell'Orso, Roberto; Donato, Silvio; Fedi, Giacomo; Foà, Lorenzo; Giassi, Alessandro; Grippo, Maria Teresa; Ligabue, Franco; Lomtadze, Teimuraz; Martini, Luca; Messineo, Alberto; Palla, Fabrizio; Rizzi, Andrea; Savoy-Navarro, Aurore; Serban, Alin Titus; Spagnolo, Paolo; Tenchini, Roberto; Tonelli, Guido; Venturi, Andrea; Verdini, Piero Giorgio; Barone, Luciano; Cavallari, Francesca; D'imperio, Giulia; Del Re, Daniele; Diemoz, Marcella; Gelli, Simone; Jorda, Clara; Longo, Egidio; Margaroli, Fabrizio; Meridiani, Paolo; Organtini, Giovanni; Paramatti, Riccardo; Preiato, Federico; Rahatlou, Shahram; Rovelli, Chiara; Santanastasio, Francesco; Traczyk, Piotr; Amapane, Nicola; Arcidiacono, Roberta; Argiro, Stefano; Arneodo, Michele; Bellan, Riccardo; Biino, Cristina; Cartiglia, Nicolo; Costa, Marco; Covarelli, Roberto; Degano, Alessandro; Demaria, Natale; Finco, Linda; Kiani, Bilal; Mariotti, Chiara; Maselli, Silvia; Migliore, Ernesto; Monaco, Vincenzo; Monteil, Ennio; Obertino, Maria Margherita; Pacher, Luca; Pastrone, Nadia; Pelliccioni, Mario; Pinna Angioni, Gian Luca; Ravera, Fabio; Romero, Alessandra; Ruspa, Marta; Sacchi, Roberto; Solano, Ada; Staiano, Amedeo; Tamponi, Umberto; Belforte, Stefano; Candelise, Vieri; Casarsa, Massimo; Cossutti, Fabio; Della Ricca, Giuseppe; Gobbo, Benigno; La Licata, Chiara; Marone, Matteo; Schizzi, Andrea; Zanetti, Anna; Kropivnitskaya, Anna; Nam, Soon-Kwon; Kim, Dong Hee; Kim, Gui Nyun; Kim, Min Suk; Kong, Dae Jung; Lee, Sangeun; Oh, Young Do; Sakharov, Alexandre; Son, Dong-Chul; Brochero Cifuentes, Javier Andres; Kim, Hyunsoo; Kim, Tae Jeong; Song, Sanghyeon; Choi, Suyong; Go, Yeonju; Gyun, Dooyeon; Hong, Byung-Sik; Jo, Mihee; Kim, Hyunchul; Kim, Yongsun; Lee, Byounghoon; Lee, Kisoo; Lee, Kyong Sei; Lee, Songkyo; Park, Sung Keun; Roh, Youn; Yoo, Hwi Dong; Choi, Minkyoo; Kim, Hyunyong; Kim, Ji Hyun; Lee, Jason Sang Hun; Park, Inkyu; Ryu, Geonmo; Ryu, Min Sang; Choi, Young-Il; Goh, Junghwan; Kim, Donghyun; Kwon, Eunhyang; Lee, Jongseok; Yu, Intae; Dudenas, Vytautas; Juodagalvis, Andrius; Vaitkus, Juozas; Ahmed, Ijaz; Ibrahim, Zainol Abidin; Komaragiri, Jyothsna Rani; Md Ali, Mohd Adli Bin; Mohamad Idris, Faridah; Wan Abdullah, Wan Ahmad Tajuddin; Yusli, Mohd Nizam; Casimiro Linares, Edgar; Castilla-Valdez, Heriberto; De La Cruz-Burelo, Eduard; Heredia-De La Cruz, Ivan; Hernandez-Almada, Alberto; Lopez-Fernandez, Ricardo; Sánchez Hernández, Alberto; Carrillo Moreno, Salvador; Vazquez Valencia, Fabiola; Pedraza, Isabel; Salazar Ibarguen, Humberto Antonio; Morelos Pineda, Antonio; Krofcheck, David; Butler, Philip H; Ahmad, Ashfaq; Ahmad, Muhammad; Hassan, Qamar; Hoorani, Hafeez R; Khan, Wajid Ali; Khurshid, Taimoor; Shoaib, Muhammad; Bialkowska, Helena; Bluj, Michal; Boimska, Bożena; Frueboes, Tomasz; Górski, Maciej; Kazana, Malgorzata; Nawrocki, Krzysztof; Romanowska-Rybinska, Katarzyna; Szleper, Michal; Zalewski, Piotr; Brona, Grzegorz; Bunkowski, Karol; Byszuk, Adrian; Doroba, Krzysztof; Kalinowski, Artur; Konecki, Marcin; Krolikowski, Jan; Misiura, Maciej; Olszewski, Michal; Pozniak, Krzysztof; Walczak, Marek; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, Pietro; Ferreira Parracho, Pedro Guilherme; Gallinaro, Michele; Leonardo, Nuno; Lloret Iglesias, Lara; Nguyen, Federico; Rodrigues Antunes, Joao; Seixas, Joao; Toldaiev, Oleksii; Vadruccio, Daniele; Varela, Joao; Vischia, Pietro; Afanasiev, Serguei; Bunin, Pavel; Gavrilenko, Mikhail; Golutvin, Igor; Gorbunov, Ilya; Kamenev, Alexey; Karjavin, Vladimir; Konoplyanikov, Viktor; Lanev, Alexander; Malakhov, Alexander; Matveev, Viktor; Moisenz, Petr; Palichik, Vladimir; Perelygin, Victor; Shmatov, Sergey; Shulha, Siarhei; Skatchkov, Nikolai; Smirnov, Vitaly; Zarubin, Anatoli; Golovtsov, Victor; Ivanov, Yury; Kim, Victor; Kuznetsova, Ekaterina; Levchenko, Petr; Murzin, Victor; Oreshkin, Vadim; Smirnov, Igor; Sulimov, Valentin; Uvarov, Lev; Vavilov, Sergey; Vorobyev, Alexey; Andreev, Yuri; Dermenev, Alexander; Gninenko, Sergei; Golubev, Nikolai; Karneyeu, Anton; Kirsanov, Mikhail; Krasnikov, Nikolai; Pashenkov, Anatoli; Tlisov, Danila; Toropin, Alexander; Epshteyn, Vladimir; Gavrilov, Vladimir; Lychkovskaya, Natalia; Popov, Vladimir; Pozdnyakov, Ivan; Safronov, Grigory; Spiridonov, Alexander; Vlasov, Evgueni; Zhokin, Alexander; Bylinkin, Alexander; Andreev, Vladimir; Azarkin, Maksim; Dremin, Igor; Kirakosyan, Martin; Leonidov, Andrey; Mesyats, Gennady; Rusakov, Sergey V; Baskakov, Alexey; Belyaev, Andrey; Boos, Edouard; Dubinin, Mikhail; Dudko, Lev; Ershov, Alexander; Gribushin, Andrey; Kaminskiy, Alexandre; Klyukhin, Vyacheslav; Kodolova, Olga; Lokhtin, Igor; Miagkov, Igor; Obraztsov, Stepan; Petrushanko, Sergey; Savrin, Viktor; Azhgirey, Igor; Bayshev, Igor; Bitioukov, Sergei; Kachanov, Vassili; Kalinin, Alexey; Konstantinov, Dmitri; Krychkine, Victor; Petrov, Vladimir; Ryutin, Roman; Sobol, Andrei; Tourtchanovitch, Leonid; Troshin, Sergey; Tyurin, Nikolay; Uzunian, Andrey; Volkov, Alexey; Adzic, Petar; Milosevic, Jovan; Rekovic, Vladimir; Alcaraz Maestre, Juan; Calvo, Enrique; Cerrada, Marcos; Chamizo Llatas, Maria; Colino, Nicanor; De La Cruz, Begona; Delgado Peris, Antonio; Domínguez Vázquez, Daniel; Escalante Del Valle, Alberto; Fernandez Bedoya, Cristina; Fernández Ramos, Juan Pablo; Flix, Jose; Fouz, Maria Cruz; Garcia-Abia, Pablo; Gonzalez Lopez, Oscar; Goy Lopez, Silvia; Hernandez, Jose M; Josa, Maria Isabel; Navarro De Martino, Eduardo; Pérez-Calero Yzquierdo, Antonio María; Puerta Pelayo, Jesus; Quintario Olmeda, Adrián; Redondo, Ignacio; Romero, Luciano; Santaolalla, Javier; Senghi Soares, Mara; Albajar, Carmen; de Trocóniz, Jorge F; Missiroli, Marino; Moran, Dermot; Cuevas, Javier; Fernandez Menendez, Javier; Folgueras, Santiago; Gonzalez Caballero, Isidro; Palencia Cortezon, Enrique; Vizan Garcia, Jesus Manuel; Cabrillo, Iban Jose; Calderon, Alicia; Castiñeiras De Saa, Juan Ramon; De Castro Manzano, Pablo; Duarte Campderros, Jordi; Fernandez, Marcos; Garcia-Ferrero, Juan; Gomez, Gervasio; Lopez Virto, Amparo; Marco, Jesus; Marco, Rafael; Martinez Rivero, Celso; Matorras, Francisco; Munoz Sanchez, Francisca Javiela; Piedra Gomez, Jonatan; Rodrigo, Teresa; Rodríguez-Marrero, Ana Yaiza; Ruiz-Jimeno, Alberto; Scodellaro, Luca; Trevisani, Nicolò; Vila, Ivan; Vilar Cortabitarte, Rocio; Abbaneo, Duccio; Auffray, Etiennette; Auzinger, Georg; Bachtis, Michail; Baillon, Paul; Ball, Austin; Barney, David; Benaglia, Andrea; Bendavid, Joshua; Benhabib, Lamia; Benitez, Jose F; Berruti, Gaia Maria; Bloch, Philippe; Bocci, Andrea; Bonato, Alessio; Botta, Cristina; Breuker, Horst; Camporesi, Tiziano; Castello, Roberto; Cerminara, Gianluca; D'Alfonso, Mariarosaria; D'Enterria, David; Dabrowski, Anne; Daponte, Vincenzo; David Tinoco Mendes, Andre; De Gruttola, Michele; De Guio, Federico; De Roeck, Albert; De Visscher, Simon; Di Marco, Emanuele; Dobson, Marc; Dordevic, Milos; Dorney, Brian; Du Pree, Tristan; 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Simon, Michal; Sphicas, Paraskevas; Steggemann, Jan; Stieger, Benjamin; Stoye, Markus; Takahashi, Yuta; Treille, Daniel; Triossi, Andrea; Tsirou, Andromachi; Veres, Gabor Istvan; Wardle, Nicholas; Wöhri, Hermine Katharina; Zagoździńska, Agnieszka; Zeuner, Wolfram Dietrich; Bertl, Willi; Deiters, Konrad; Erdmann, Wolfram; Horisberger, Roland; Ingram, Quentin; Kaestli, Hans-Christian; Kotlinski, Danek; Langenegger, Urs; Renker, Dieter; Rohe, Tilman; Bachmair, Felix; Bäni, Lukas; Bianchini, Lorenzo; Casal, Bruno; Dissertori, Günther; Dittmar, Michael; Donegà, Mauro; Eller, Philipp; Grab, Christoph; Heidegger, Constantin; Hits, Dmitry; Hoss, Jan; Kasieczka, Gregor; Lustermann, Werner; Mangano, Boris; Marionneau, Matthieu; Martinez Ruiz del Arbol, Pablo; Masciovecchio, Mario; Meister, Daniel; Micheli, Francesco; Musella, Pasquale; Nessi-Tedaldi, Francesca; Pandolfi, Francesco; Pata, Joosep; Pauss, Felicitas; Perrozzi, Luca; Quittnat, Milena; Rossini, Marco; Starodumov, Andrei; Takahashi, Maiko; Tavolaro, Vittorio Raoul; Theofilatos, Konstantinos; Wallny, Rainer; Aarrestad, Thea Klaeboe; Amsler, Claude; Caminada, Lea; Canelli, Maria Florencia; Chiochia, Vincenzo; De Cosa, Annapaola; Galloni, Camilla; Hinzmann, Andreas; Hreus, Tomas; Kilminster, Benjamin; Lange, Clemens; Ngadiuba, Jennifer; Pinna, Deborah; Robmann, Peter; Ronga, Frederic Jean; Salerno, Daniel; Yang, Yong; Cardaci, Marco; Chen, Kuan-Hsin; Doan, Thi Hien; Jain, Shilpi; Khurana, Raman; Konyushikhin, Maxim; Kuo, Chia-Ming; Lin, Willis; Lu, Yun-Ju; Yu, Shin-Shan; Kumar, Arun; Bartek, Rachel; Chang, Paoti; Chang, You-Hao; Chang, Yu-Wei; Chao, Yuan; Chen, Kai-Feng; Chen, Po-Hsun; Dietz, Charles; Fiori, Francesco; Grundler, Ulysses; Hou, George Wei-Shu; Hsiung, Yee; Liu, Yueh-Feng; Lu, Rong-Shyang; Miñano Moya, Mercedes; Petrakou, Eleni; Tsai, Jui-fa; Tzeng, Yeng-Ming; Asavapibhop, Burin; Kovitanggoon, Kittikul; Singh, Gurpreet; Srimanobhas, Norraphat; Suwonjandee, Narumon; Adiguzel, Aytul; Bakirci, Mustafa Numan; Demiroglu, Zuhal Seyma; Dozen, Candan; Eskut, Eda; Girgis, Semiray; Gokbulut, Gul; Guler, Yalcin; Gurpinar, Emine; Hos, Ilknur; Kangal, Evrim Ersin; Onengut, Gulsen; Ozdemir, Kadri; Polatoz, Ayse; Sunar Cerci, Deniz; Tali, Bayram; Topakli, Huseyin; Vergili, Mehmet; Zorbilmez, Caglar; Akin, Ilina Vasileva; Bilin, Bugra; Bilmis, Selcuk; Isildak, Bora; Karapinar, Guler; Yalvac, Metin; Zeyrek, Mehmet; Gülmez, Erhan; Kaya, Mithat; Kaya, Ozlem; Yetkin, Elif Asli; Yetkin, Taylan; Cakir, Altan; Cankocak, Kerem; Sen, Sercan; Vardarlı, Fuat Ilkehan; Grynyov, Boris; Levchuk, Leonid; Sorokin, Pavel; Aggleton, Robin; Ball, Fionn; Beck, Lana; Brooke, James John; Clement, Emyr; Cussans, David; Flacher, Henning; Goldstein, Joel; Grimes, Mark; Heath, Greg P; Heath, Helen F; Jacob, Jeson; Kreczko, Lukasz; Lucas, Chris; Meng, Zhaoxia; Newbold, Dave M; Paramesvaran, Sudarshan; Poll, Anthony; Sakuma, Tai; Seif El Nasr-storey, Sarah; Senkin, Sergey; Smith, Dominic; Smith, Vincent J; Bell, Ken W; Belyaev, Alexander; Brew, Christopher; Brown, Robert M; Calligaris, Luigi; Cieri, Davide; Cockerill, David JA; Coughlan, John A; Harder, Kristian; Harper, Sam; Olaiya, Emmanuel; Petyt, David; Shepherd-Themistocleous, Claire; Thea, Alessandro; Tomalin, Ian R; Williams, Thomas; Womersley, William John; Worm, Steven; Baber, Mark; Bainbridge, Robert; Buchmuller, Oliver; Bundock, Aaron; Burton, Darren; Casasso, Stefano; Citron, Matthew; Colling, David; Corpe, Louie; Cripps, Nicholas; Dauncey, Paul; Davies, Gavin; De Wit, Adinda; Della Negra, Michel; Dunne, Patrick; Elwood, Adam; Ferguson, William; Fulcher, Jonathan; Futyan, David; Hall, Geoffrey; Iles, Gregory; Kenzie, Matthew; Lane, Rebecca; Lucas, Robyn; Lyons, Louis; Magnan, Anne-Marie; Malik, Sarah; Nash, Jordan; Nikitenko, Alexander; Pela, Joao; Pesaresi, Mark; Petridis, Konstantinos; Raymond, David Mark; Richards, Alexander; Rose, Andrew; Seez, Christopher; Tapper, Alexander; Uchida, Kirika; Vazquez Acosta, Monica; Virdee, Tejinder; Zenz, Seth Conrad; Cole, Joanne; Hobson, Peter R; Khan, Akram; Kyberd, Paul; Leggat, Duncan; Leslie, Dawn; Reid, Ivan; Symonds, Philip; Teodorescu, Liliana; Turner, Mark; Borzou, Ahmad; Call, Kenneth; Dittmann, Jay; Hatakeyama, Kenichi; Liu, Hongxuan; Pastika, Nathaniel; Charaf, Otman; Cooper, Seth; Henderson, Conor; Rumerio, Paolo; Arcaro, Daniel; Avetisyan, Aram; Bose, Tulika; Fantasia, Cory; Gastler, Daniel; Lawson, Philip; Rankin, Dylan; Richardson, Clint; Rohlf, James; St John, Jason; Sulak, Lawrence; Zou, David; Alimena, Juliette; Berry, Edmund; Bhattacharya, Saptaparna; Cutts, David; Dhingra, Nitish; Ferapontov, Alexey; Garabedian, Alex; Hakala, John; Heintz, Ulrich; Laird, Edward; Landsberg, Greg; Mao, Zaixing; Narain, Meenakshi; Piperov, Stefan; Sagir, Sinan; Syarif, Rizki; Breedon, Richard; Breto, Guillermo; Calderon De La Barca Sanchez, Manuel; Chauhan, Sushil; Chertok, Maxwell; Conway, John; Conway, Rylan; Cox, Peter Timothy; Erbacher, Robin; Gardner, Michael; Ko, Winston; Lander, Richard; Mulhearn, Michael; Pellett, Dave; Pilot, Justin; Ricci-Tam, Francesca; Shalhout, Shalhout; Smith, John; Squires, Michael; Stolp, Dustin; Tripathi, Mani; Wilbur, Scott; Yohay, Rachel; Cousins, Robert; Everaerts, Pieter; Farrell, Chris; Hauser, Jay; Ignatenko, Mikhail; Saltzberg, David; Takasugi, Eric; Valuev, Vyacheslav; Weber, Matthias; Burt, Kira; Clare, Robert; Ellison, John Anthony; Gary, J William; Hanson, Gail; Heilman, Jesse; Paneva, Mirena Ivova; Jandir, Pawandeep; Kennedy, Elizabeth; Lacroix, Florent; Long, Owen Rosser; Luthra, Arun; Malberti, Martina; Olmedo Negrete, Manuel; Shrinivas, Amithabh; Wei, Hua; Wimpenny, Stephen; Yates, Brent; Branson, James G; Cerati, Giuseppe Benedetto; Cittolin, Sergio; D'Agnolo, Raffaele Tito; Derdzinski, Mark; Holzner, André; Kelley, Ryan; Klein, Daniel; Letts, James; Macneill, Ian; Olivito, Dominick; Padhi, Sanjay; Pieri, Marco; Sani, Matteo; Sharma, Vivek; Simon, Sean; Tadel, Matevz; Vartak, Adish; Wasserbaech, Steven; Welke, Charles; Würthwein, Frank; Yagil, Avraham; Zevi Della Porta, Giovanni; Bradmiller-Feld, John; Campagnari, Claudio; Dishaw, Adam; Dutta, Valentina; Flowers, Kristen; Franco Sevilla, Manuel; Geffert, Paul; George, Christopher; Golf, Frank; Gouskos, Loukas; Gran, Jason; Incandela, Joe; Mccoll, Nickolas; Mullin, Sam Daniel; Richman, Jeffrey; Stuart, David; Suarez, Indara; West, Christopher; Yoo, Jaehyeok; Anderson, Dustin; Apresyan, Artur; Bornheim, Adolf; Bunn, Julian; Chen, Yi; Duarte, Javier; Mott, Alexander; Newman, Harvey B; Pena, Cristian; Pierini, Maurizio; Spiropulu, Maria; Vlimant, Jean-Roch; Xie, Si; Zhu, Ren-Yuan; Andrews, Michael Benjamin; Azzolini, Virginia; Calamba, Aristotle; Carlson, Benjamin; Ferguson, Thomas; Paulini, Manfred; Russ, James; Sun, Menglei; Vogel, Helmut; Vorobiev, Igor; Cumalat, John Perry; Ford, William T; Gaz, Alessandro; Jensen, Frank; Johnson, Andrew; Krohn, Michael; Mulholland, Troy; Nauenberg, Uriel; Stenson, Kevin; Wagner, Stephen Robert; Alexander, James; Chatterjee, Avishek; Chaves, Jorge; Chu, Jennifer; Dittmer, Susan; Eggert, Nicholas; Mirman, Nathan; Nicolas Kaufman, Gala; Patterson, Juliet Ritchie; Rinkevicius, Aurelijus; Ryd, Anders; Skinnari, Louise; Soffi, Livia; Sun, Werner; Tan, Shao Min; Teo, Wee Don; Thom, Julia; Thompson, Joshua; Tucker, Jordan; Weng, Yao; Wittich, Peter; Abdullin, Salavat; Albrow, Michael; Anderson, Jacob; Apollinari, Giorgio; Banerjee, Sunanda; Bauerdick, Lothar AT; Beretvas, Andrew; Berryhill, Jeffrey; Bhat, Pushpalatha C; Bolla, Gino; Burkett, Kevin; Butler, Joel Nathan; Cheung, Harry; Chlebana, Frank; Cihangir, Selcuk; Elvira, Victor Daniel; Fisk, Ian; Freeman, Jim; Gottschalk, Erik; Gray, Lindsey; Green, Dan; Grünendahl, Stefan; Gutsche, Oliver; Hanlon, Jim; Hare, Daryl; Harris, Robert M; Hasegawa, Satoshi; Hirschauer, James; Hu, Zhen; Jayatilaka, Bodhitha; Jindariani, Sergo; Johnson, Marvin; Joshi, Umesh; Jung, Andreas Werner; Klima, Boaz; Kreis, Benjamin; Kwan, Simon; Lammel, Stephan; Linacre, Jacob; Lincoln, Don; Lipton, Ron; Liu, Tiehui; Lopes De Sá, Rafael; Lykken, Joseph; Maeshima, Kaori; Marraffino, John Michael; Martinez Outschoorn, Verena Ingrid; Maruyama, Sho; Mason, David; McBride, Patricia; Merkel, Petra; Mishra, Kalanand; Mrenna, Stephen; Nahn, Steve; Newman-Holmes, Catherine; O'Dell, Vivian; Pedro, Kevin; Prokofyev, Oleg; Rakness, Gregory; Sexton-Kennedy, Elizabeth; Soha, Aron; Spalding, William J; Spiegel, Leonard; Taylor, Lucas; Tkaczyk, Slawek; Tran, Nhan Viet; Uplegger, Lorenzo; Vaandering, Eric Wayne; Vernieri, Caterina; Verzocchi, Marco; Vidal, Richard; Weber, Hannsjoerg Artur; Whitbeck, Andrew; Yang, Fan; Acosta, Darin; Avery, Paul; Bortignon, Pierluigi; Bourilkov, Dimitri; Carnes, Andrew; Carver, Matthew; Curry, David; Das, Souvik; Di Giovanni, Gian Piero; Field, Richard D; Furic, Ivan-Kresimir; Gleyzer, Sergei V; Hugon, Justin; Konigsberg, Jacobo; Korytov, Andrey; Low, Jia Fu; Ma, Peisen; Matchev, Konstantin; Mei, Hualin; Milenovic, Predrag; Mitselmakher, Guenakh; Rank, Douglas; Rossin, Roberto; Shchutska, Lesya; Snowball, Matthew; Sperka, David; Terentyev, Nikolay; Thomas, Laurent; Wang, Jian; Wang, Sean-Jiun; Yelton, John; Hewamanage, Samantha; Linn, Stephan; Markowitz, Pete; Martinez, German; Rodriguez, Jorge Luis; Ackert, Andrew; Adams, Jordon Rowe; Adams, Todd; Askew, Andrew; Bochenek, Joseph; Diamond, Brendan; Haas, Jeff; Hagopian, Sharon; Hagopian, Vasken; Johnson, Kurtis F; Khatiwada, Ajeeta; Prosper, Harrison; Weinberg, Marc; Baarmand, Marc M; Bhopatkar, Vallary; Colafranceschi, Stefano; Hohlmann, Marcus; Kalakhety, Himali; Noonan, Daniel; Roy, Titas; Yumiceva, Francisco; Adams, Mark Raymond; Apanasevich, Leonard; Berry, Douglas; Betts, Russell Richard; Bucinskaite, Inga; Cavanaugh, Richard; Evdokimov, Olga; Gauthier, Lucie; Gerber, Cecilia Elena; Hofman, David Jonathan; Kurt, Pelin; O'Brien, Christine; Sandoval Gonzalez, Irving Daniel; Silkworth, Christopher; Turner, Paul; Varelas, Nikos; Wu, Zhenbin; Zakaria, Mohammed; Bilki, Burak; Clarida, Warren; Dilsiz, Kamuran; Durgut, Süleyman; Gandrajula, Reddy Pratap; Haytmyradov, Maksat; Khristenko, Viktor; Merlo, Jean-Pierre; Mermerkaya, Hamit; Mestvirishvili, Alexi; Moeller, Anthony; Nachtman, Jane; Ogul, Hasan; Onel, Yasar; Ozok, Ferhat; Penzo, Aldo; Snyder, Christina; Tiras, Emrah; Wetzel, James; Yi, Kai; Anderson, Ian; Barnett, Bruce Arnold; Blumenfeld, Barry; Eminizer, Nicholas; Fehling, David; Feng, Lei; Gritsan, Andrei; Maksimovic, Petar; Martin, Christopher; Osherson, Marc; Roskes, Jeffrey; Cocoros, Alice; Sarica, Ulascan; Swartz, Morris; Xiao, Meng; Xin, Yongjie; You, Can; Baringer, Philip; Bean, Alice; Benelli, Gabriele; Bruner, Christopher; Kenny III, Raymond Patrick; Majumder, Devdatta; Malek, Magdalena; Murray, Michael; Sanders, Stephen; Stringer, Robert; Wang, Quan; Ivanov, Andrew; Kaadze, Ketino; Khalil, Sadia; Makouski, Mikhail; Maravin, Yurii; Mohammadi, Abdollah; Saini, Lovedeep Kaur; Skhirtladze, Nikoloz; Toda, Sachiko; Lange, David; Rebassoo, Finn; Wright, Douglas; Anelli, Christopher; Baden, Drew; Baron, Owen; Belloni, Alberto; Calvert, Brian; Eno, Sarah Catherine; Ferraioli, Charles; Gomez, Jaime; Hadley, Nicholas John; Jabeen, Shabnam; Kellogg, Richard G; Kolberg, Ted; Kunkle, Joshua; Lu, Ying; Mignerey, Alice; Shin, Young Ho; Skuja, Andris; Tonjes, Marguerite; Tonwar, Suresh C; Apyan, Aram; Barbieri, Richard; Baty, Austin; Bierwagen, Katharina; Brandt, Stephanie; Busza, Wit; Cali, Ivan Amos; Demiragli, Zeynep; Di Matteo, Leonardo; Gomez Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga; Iiyama, Yutaro; Innocenti, Gian Michele; Klute, Markus; Kovalskyi, Dmytro; Lai, Yue Shi; Lee, Yen-Jie; Levin, Andrew; Luckey, Paul David; Marini, Andrea Carlo; Mcginn, Christopher; Mironov, Camelia; Narayanan, Siddharth; Niu, Xinmei; Paus, Christoph; Ralph, Duncan; Roland, Christof; Roland, Gunther; Salfeld-Nebgen, Jakob; Stephans, George; Sumorok, Konstanty; Varma, Mukund; Velicanu, Dragos; Veverka, Jan; Wang, Jing; Wang, Ta-Wei; Wyslouch, Bolek; Yang, Mingming; Zhukova, Victoria; Dahmes, Bryan; Evans, Andrew; Finkel, Alexey; Gude, Alexander; Hansen, Peter; Kalafut, Sean; Kao, Shih-Chuan; Klapoetke, Kevin; Kubota, Yuichi; Lesko, Zachary; Mans, Jeremy; Nourbakhsh, Shervin; Ruckstuhl, Nicole; Rusack, Roger; Tambe, Norbert; Turkewitz, Jared; Acosta, John Gabriel; Oliveros, Sandra; Avdeeva, Ekaterina; Bloom, Kenneth; Bose, Suvadeep; Claes, Daniel R; Dominguez, Aaron; Fangmeier, Caleb; Gonzalez Suarez, Rebeca; Kamalieddin, Rami; Keller, Jason; Knowlton, Dan; Kravchenko, Ilya; Meier, Frank; Monroy, Jose; Ratnikov, Fedor; Siado, Joaquin Emilo; Snow, Gregory R; Alyari, Maral; Dolen, James; George, Jimin; Godshalk, Andrew; Harrington, Charles; Iashvili, Ia; Kaisen, Josh; Kharchilava, Avto; Kumar, Ashish; Rappoccio, Salvatore; Roozbahani, Bahareh; Alverson, George; Barberis, Emanuela; Baumgartel, Darin; Chasco, Matthew; Hortiangtham, Apichart; Massironi, Andrea; Morse, David Michael; Nash, David; Orimoto, Toyoko; Teixeira De Lima, Rafael; Trocino, Daniele; Wang, Ren-Jie; Wood, Darien; Zhang, Jinzhong; Hahn, Kristan Allan; Kubik, Andrew; Mucia, Nicholas; Odell, Nathaniel; Pollack, Brian; Pozdnyakov, Andrey; Schmitt, Michael Henry; Stoynev, Stoyan; Sung, Kevin; Trovato, Marco; Velasco, Mayda; Brinkerhoff, Andrew; Dev, Nabarun; Hildreth, Michael; Jessop, Colin; Karmgard, Daniel John; Kellams, Nathan; Lannon, Kevin; Lynch, Sean; Marinelli, Nancy; Meng, Fanbo; Mueller, Charles; Musienko, Yuri; Pearson, Tessa; Planer, Michael; Reinsvold, Allison; Ruchti, Randy; Smith, Geoffrey; Taroni, Silvia; Valls, Nil; Wayne, Mitchell; Wolf, Matthias; Woodard, Anna; Antonelli, Louis; Brinson, Jessica; Bylsma, Ben; Durkin, Lloyd Stanley; Flowers, Sean; Hart, Andrew; Hill, Christopher; Hughes, Richard; Ji, Weifeng; Kotov, Khristian; Ling, Ta-Yung; Liu, Bingxuan; Luo, Wuming; Puigh, Darren; Rodenburg, Marissa; Winer, Brian L; Wulsin, Howard Wells; Driga, Olga; Elmer, Peter; Hardenbrook, Joshua; Hebda, Philip; Koay, Sue Ann; Lujan, Paul; Marlow, Daniel; Medvedeva, Tatiana; Mooney, Michael; Olsen, James; Palmer, Christopher; Piroué, Pierre; Saka, Halil; Stickland, David; Tully, Christopher; Zuranski, Andrzej; Malik, Sudhir; Barnes, Virgil E; Benedetti, Daniele; Bortoletto, Daniela; Gutay, Laszlo; Jha, Manoj; Jones, Matthew; Jung, Kurt; Miller, David Harry; Neumeister, Norbert; Radburn-Smith, Benjamin Charles; Shi, Xin; Shipsey, Ian; Silvers, David; Sun, Jian; Svyatkovskiy, Alexey; Wang, Fuqiang; Xie, Wei; Xu, Lingshan; Parashar, Neeti; Stupak, John; Adair, Antony; Akgun, Bora; Chen, Zhenyu; Ecklund, Karl Matthew; Geurts, Frank JM; Guilbaud, Maxime; Li, Wei; Michlin, Benjamin; Northup, Michael; Padley, Brian Paul; Redjimi, Radia; Roberts, Jay; Rorie, Jamal; Tu, Zhoudunming; Zabel, James; Betchart, Burton; Bodek, Arie; de Barbaro, Pawel; Demina, Regina; Eshaq, Yossof; Ferbel, Thomas; Galanti, Mario; Garcia-Bellido, Aran; Han, Jiyeon; Harel, Amnon; Hindrichs, Otto; Khukhunaishvili, Aleko; Petrillo, Gianluca; Tan, Ping; Verzetti, Mauro; Arora, Sanjay; Barker, Anthony; Chou, John Paul; Contreras-Campana, Christian; Contreras-Campana, Emmanuel; Duggan, Daniel; Ferencek, Dinko; Gershtein, Yuri; Gray, Richard; Halkiadakis, Eva; Hidas, Dean; Hughes, Elliot; Kaplan, Steven; Kunnawalkam Elayavalli, Raghav; Lath, Amitabh; Nash, Kevin; Panwalkar, Shruti; Park, Michael; Salur, Sevil; Schnetzer, Steve; Sheffield, David; Somalwar, Sunil; Stone, Robert; Thomas, Scott; Thomassen, Peter; Walker, Matthew; Foerster, Mark; Riley, Grant; Rose, Keith; Spanier, Stefan; York, Andrew; Bouhali, Othmane; Castaneda Hernandez, Alfredo; Dalchenko, Mykhailo; De Mattia, Marco; Delgado, Andrea; Dildick, Sven; Eusebi, Ricardo; Gilmore, Jason; Kamon, Teruki; Krutelyov, Vyacheslav; Mueller, Ryan; Osipenkov, Ilya; Pakhotin, Yuriy; Patel, Rishi; Perloff, Alexx; Rose, Anthony; Safonov, Alexei; Tatarinov, Aysen; Ulmer, Keith; Akchurin, Nural; Cowden, Christopher; Damgov, Jordan; Dragoiu, Cosmin; Dudero, Phillip Russell; Faulkner, James; Kunori, Shuichi; Lamichhane, Kamal; Lee, Sung Won; Libeiro, Terence; Undleeb, Sonaina; Volobouev, Igor; Appelt, Eric; Delannoy, Andrés G; Greene, Senta; Gurrola, Alfredo; Janjam, Ravi; Johns, Willard; Maguire, Charles; Mao, Yaxian; Melo, Andrew; Ni, Hong; Sheldon, Paul; Snook, Benjamin; Tuo, Shengquan; Velkovska, Julia; Xu, Qiao; Arenton, Michael Wayne; Cox, Bradley; Francis, Brian; Goodell, Joseph; Hirosky, Robert; Ledovskoy, Alexander; Li, Hengne; Lin, Chuanzhe; Neu, Christopher; Sinthuprasith, Tutanon; Sun, Xin; Wang, Yanchu; Wolfe, Evan; Wood, John; Xia, Fan; Clarke, Christopher; Harr, Robert; Karchin, Paul Edmund; Kottachchi Kankanamge Don, Chamath; Lamichhane, Pramod; Sturdy, Jared; Belknap, Donald; Carlsmith, Duncan; Cepeda, Maria; Dasu, Sridhara; Dodd, Laura; Duric, Senka; Gomber, Bhawna; Grothe, Monika; Hall-Wilton, Richard; Herndon, Matthew; Hervé, Alain; Klabbers, Pamela; Lanaro, Armando; Levine, Aaron; Long, Kenneth; Loveless, Richard; Mohapatra, Ajit; Ojalvo, Isabel; Perry, Thomas; Pierro, Giuseppe Antonio; Polese, Giovanni; Ruggles, Tyler; Sarangi, Tapas; Savin, Alexander; Sharma, Archana; Smith, Nicholas; Smith, Wesley H; Taylor, Devin; Woods, Nathaniel

    2017-01-01

    This paper describes the CMS trigger system and its performance during Run 1 of the LHC. The trigger system consists of two levels designed to select events of potential physics interest from a GHz (MHz) interaction rate of proton-proton (heavy ion) collisions. The first level of the trigger is implemented in hardware, and selects events containing detector signals consistent with an electron, photon, muon, $\\tau$ lepton, jet, or missing transverse energy. A programmable menu of up to 128 object-based algorithms is used to select events for subsequent processing. The trigger thresholds are adjusted to the LHC instantaneous luminosity during data taking in order to restrict the output rate to 100 kHz, the upper limit imposed by the CMS readout electronics. The second level, implemented in software, further refines the purity of the output stream, selecting an average rate of 400 Hz for offline event storage. The objectives, strategy and performance of the trigger system during the LHC Run 1 are described.

  15. CMS tracker observes muons

    CERN Multimedia

    2006-01-01

    A computer image of a cosmic ray traversing the many layers of the TEC+ silicon sensors. The first cosmic muon tracks have been observed in one of the CMS tracker endcaps. On 14 March, a sector on one of the two large tracker endcaps underwent a cosmic muon run. Since then, thousands of tracks have been recorded. These data will be used not only to study the tracking, but also to exercise various track alignment algorithms The endcap tested, called the TEC+, is under construction at RWTH Aachen in Germany. The endcaps have a modular design, with silicon strip modules mounted onto wedge-shaped carbon fibre support plates, so-called petals. Up to 28 modules are arranged in radial rings on both sides of these plates. One eighth of an endcap is populated with 18 petals and called a sector. The next major step is a test of the first sector at CMS operating conditions, with the silicon modules at a temperature below -10°C. Afterwards, the remaining seven sectors have to be integrated. In autumn 2006, TEC+ wil...

  16. CMS Resistive plate Champers

    CERN Document Server

    Zainab, Karam

    2013-01-01

    There are many types of gas detectors which are used in CERN in LHC project, There is a main parts for the gas detectors which must be in all gas detectors types like Multiwire proportional chambers, such as the micromesh gaseous structure chamber (the MicroMegas), Gas-electron multiplier (GEM) detector, Resistive Plate Champers... Compact Muon Solenoid (CMS) experiment detecting muons which are powerful tool for recognizing signatures of interesting physics processes. The CMS detector uses: drift tube (DT), cathode strip chamber (CSC) and resistive plate chamber (RPC). Building RPC’s was my project in summer student program (hardware). RPC’s have advantages which are triggering detector and Excellent time resolution which reinforce the measurement of the correct beam crossing time. RPC’s Organized in stations :  RPC barrel (RB) there are 4 stations, namely RB1, RB2, RB3, and RB4  While in the RPC endcap (RE) the 3 stations are RE1, RE2, and RE3. In the endcaps a new starion will be added and this...

  17. The CMS Event Builder

    CERN Document Server

    Brigljevic, V; Cano, E; Cittolin, Sergio; Csilling, Akos; Gigi, D; Glege, F; Gómez-Reino, Robert; Gulmini, M; Gutleber, J; Jacobs, C; Kozlovszky, Miklos; Larsen, H; Magrans de Abril, Ildefons; Meijers, F; Meschi, E; Murray, S; Oh, A; Orsini, L; Pollet, L; Rácz, A; Samyn, D; Scharff-Hansen, P; Schwick, C; Sphicas, Paris; ODell, V; Suzuki, I; Berti, L; Maron, G; Toniolo, N; Zangrando, L; Ninane, A; Erhan, S; Bhattacharya, S; Branson, J G

    2003-01-01

    The data acquisition system of the CMS experiment at the Large Hadron Collider will employ an event builder which will combine data from about 500 data sources into full events at an aggregate throughput of 100 GByte/s. Several architectures and switch technologies have been evaluated for the DAQ Technical Design Report by measurements with test benches and by simulation. This paper describes studies of an EVB test-bench based on 64 PCs acting as data sources and data consumers and employing both Gigabit Ethernet and Myrinet technologies as the interconnect. In the case of Ethernet, protocols based on Layer-2 frames and on TCP/IP are evaluated. Results from ongoing studies, including measurements on throughput and scaling are presented. The architecture of the baseline CMS event builder will be outlined. The event builder is organised into two stages with intelligent buffers in between. The first stage contains 64 switches performing a first level of data concentration by building super-fragments from fragmen...

  18. Opportunistic Resource Usage in CMS

    Energy Technology Data Exchange (ETDEWEB)

    Kreuzer, Peter [RWTH Aachen U.; Hufnagel, Dirk [Fermilab; Dykstra, D. [Fermilab; Gutsche, O. [Fermilab; Tadel, M. [UC, San Diego; Sfiligoi, I. [UC, San Diego; Letts, J. [UC, San Diego; Wuerthwein, F. [UC, San Diego; McCrea, A. [UC, San Diego; Bockelman, B. [Nebraska U.; Fajardo, E. [Andes U., Merida; Linares, L. [Andes U., Merida; Wagner, R. [TI, San Diego; Konstantinov, P. [Sofiya, Inst. Nucl. Res.; Blumenfeld, B. [Johns Hopkins U.; Bradley, D. [Wisconsin U., Madison

    2014-01-01

    CMS is using a tiered setup of dedicated computing resources provided by sites distributed over the world and organized in WLCG. These sites pledge resources to CMS and are preparing them especially for CMS to run the experiment's applications. But there are more resources available opportunistically both on the GRID and in local university and research clusters which can be used for CMS applications. We will present CMS' strategy to use opportunistic resources and prepare them dynamically to run CMS applications. CMS is able to run its applications on resources that can be reached through the GRID, through EC2 compliant cloud interfaces. Even resources that can be used through ssh login nodes can be harnessed. All of these usage modes are integrated transparently into the GlideIn WMS submission infrastructure, which is the basis of CMS' opportunistic resource usage strategy. Technologies like Parrot to mount the software distribution via CVMFS and xrootd for access to data and simulation samples via the WAN are used and will be described. We will summarize the experience with opportunistic resource usage and give an outlook for the restart of LHC data taking in 2015.

  19. CMS Data Analysis School Model

    CERN Document Server

    Malik, Sudhir; Cavanaugh, R; Bloom, K; Chan, Kai-Feng; D'Hondt, J; Klima, B; Narain, M; Palla, F; Rolandi, G; Schörner-Sadenius, T

    2014-01-01

    To impart hands-on training in physics analysis, CMS experiment initiated the  concept of CMS Data Analysis School (CMSDAS). It was born three years ago at the LPC (LHC Physics Center), Fermilab and is based on earlier workshops held at the LPC and CLEO Experiment. As CMS transitioned from construction to the data taking mode, the nature of earlier training also evolved to include more of analysis tools, software tutorials and physics analysis. This effort epitomized as CMSDAS has proven to be a key for the new and young physicists to jump start and contribute to the physics goals of CMS by looking for new physics with the collision data. With over 400 physicists trained in six CMSDAS around the globe , CMS is trying to  engage the collaboration discovery potential and maximize the physics output. As a bigger goal, CMS is striving to nurture and increase engagement of the myriad talents of CMS, in the development of physics, service, upgrade, education of those new to CMS and the caree...

  20. CMS ready for winding up

    CERN Multimedia

    2003-01-01

    End of October, the last lengths of conductor for the CMS superconducting solenoid have been produced. This is another large sub-project of the CMS Magnet being successfully finished, after completion of the Yoke last year (see Bulletin 43/2002).

  1. New Forward and Diffractive Physics at CMS

    Science.gov (United States)

    Santoro, Alberto

    2011-04-01

    Forward and Diffractive Physics (FWP) in LHC is a new open window to understand this type of strong interactions. We will present a didactic description of the topics being developed at CMS. As we know there still is no new results to present for FWP. We are accumulating data to have soon new results. We will show a number of topics and the detectors properties to do the observation of several topologies. We expect to give an optimistic view of the area.

  2. Status of the CMS magnet (MT17)

    CERN Document Server

    Hervé, A; Campi, D; Cannarsa, P; Fabbricatore, P; Feyzi, F; Gerwig, H; Grillet, J P; Horváth, I L; Kaftanov, V S; Kircher, F; Loveless, R; Maugain, J M; Perinic, G; Rykaczewski, H; Sbrissa, E; Smith, R P; Veillet, L

    2002-01-01

    The CMS experiment (Compact Muon Solenoid) is a general-purpose detector designed to run at the highest luminosity at the CERN Large Hadron Collider (LHC). Its distinctive features include a 4 T superconducting solenoid with a free bore of 6 m diameter and 12.5-m length, enclosed inside a 10 000-ton return yoke. The magnet will be assembled and tested in a surface hall at Point 5 of the LHC at the beginning of 2004 before being transferred by heavy lifting means to an experimental hall 90 m below ground level. The design and construction of the magnet is a common project of the CMS Collaboration. The task is organized by a CERN based group with strong technical and contractual participation from CEA Saclay, ETH Zurich, Fermilab, INFN Genova, ITEP Moscow, University of Wisconsin and CERN. The magnet project will be described, with emphasis on the present status of the fabrication. (15 refs).

  3. Implementación y validación del ajuste de recorte y de un selector de trazas confiables para la reconstrucción de vértices primarios del experimente CMS

    CERN Document Server

    Bonnett Del Alamo, Miguel Reinaldo

    2008-01-01

    The objective of the CMS experiment is to find new particles based on proton-proton collisions. In order to find these new particles it is necessary to determine their interaction point. This is realized using vertex reconstruction. This work shows a robust method for reconstructing primary vertices which serves as an alternative to the one used by default in the CMS experiment. The other work done was an optimization of track quality in primary vertex reconstruction.

  4. The CMS silicon tracker

    Energy Technology Data Exchange (ETDEWEB)

    Focardi, E. E-mail: focardi@pi.infn.it; Albergo, S.; Angarano, M.; Azzi, P.; Babucci, E.; Bacchetta, N.; Bader, A.; Bagliesi, G.; Basti, A.; Biggeri, U.; Bilei, G.M.; Bisello, D.; Boemi, D.; Bosi, F.; Borrello, L.; Bozzi, C.; Braibant, S.; Breuker, H.; Bruzzi, M.; Buffini, A.; Busoni, S.; Candelori, A.; Caner, A.; Castaldi, R.; Castro, A.; Catacchini, E.; Checcucci, B; Ciampolini, P.; Civinini, C.; Creanza, D.; D' Alessandro, R.; Da Rold, M.; Demaria, N.; De Palma, M.; Dell' Orso, R.; Della Marina, R.; Dutta, S.; Eklund, C.; Feld, L.; Fiore, L.; French, M.; Freudenreich, K.; Frey, A.; Fuertjes, A.; Giassi, A.; Giorgi, M.; Giraldo, A.; Glessing, B.; Gu, W.H.; Hall, G.; Hammarstrom, R.; Hebbeker, T.; Honma, A.; Hrubec, J.; Huhtinen, M.; Kaminsky, A.; Karimaki, V.; Koenig, St.; Krammer, M.; Lariccia, P.; Lenzi, M.; Loreti, M.; Leubelsmeyer, K.; Lustermann, W.; Maettig, P.; Maggi, G.; Mannelli, M.; Mantovani, G.; Marchioro, A.; Mariotti, C.; Martignon, G.; Evoy, B.Mc; Meschini, M.; Messineo, A.; Migliore, E.; My, S.; Paccagnella, A.; Palla, F.; Pandoulas, D.; Papi, A.; Parrini, G.; Passeri, D.; Pieri, M.; Piperov, S.; Potenza, R.; Radicci, V.; Raffaelli, F.; Raymond, M.; Rizzo, F.; Santocchia, A.; Schmitt, B.; Selvaggi, G.; Servoli, L.; Sguazzoni, G.; Siedling, R.; Silvestris, L.; Starodumov, A.; Stavitski, I.; Stefanini, G.; Surrow, B.; Tempesta, P.; Tonelli, G.; Tricomi, A.; Tuuva, T.; Vannini, C.; Verdini, P.G.; Viertel, G.; Xie, Z.; Yahong, Li; Watts, S.; Wittmer, B

    2000-10-11

    This paper describes the Silicon microstrip Tracker of the CMS experiment at LHC. It consists of a barrel part with 5 layers and two endcaps with 10 disks each. About 10 000 single-sided equivalent modules have to be built, each one carrying two daisy-chained silicon detectors and their front-end electronics. Back-to-back modules are used to read-out the radial coordinate. The tracker will be operated in an environment kept at a temperature of T=-10 deg. C to minimize the Si sensors radiation damage. Heavily irradiated detectors will be safely operated due to the high-voltage capability of the sensors. Full-size mechanical prototypes have been built to check the system aspects before starting the construction.

  5. Electroweak Results from CMS

    CERN Document Server

    CERN. Geneva

    2016-01-01

    We present recent CMS measurements on electroweak boson production including single, double, and triple boson final states. Electroweak processes span many orders of magnitude in production cross section. Measurements of high-rate processes provide stringent tests of the standard model. In addition, rare triboson proceses and final states produced through vector boson scattering are newly accessible with the large integrated luminosity provided by the LHC. If new physics lies just beyond the reach of the LHC, its effects may manifest as enhancements to the high energy kinematics in mulitboson production. We present limits on new physics signatures using an effective field theory which models these modifications as modifications of electroweak gauge couplings. Since electroweak measurements will continue to benefit from the increasing integrated luminosity provided by the LHC, the future prospects of electroweak physics are discussed.

  6. CERN Open Days 2013, Point 5 - CMS: CMS Experiment

    CERN Multimedia

    CERN Photolab

    2013-01-01

    Stand description: Come to LHC's Point 5 and visit the Compact Muon Solenoid (CMS) experiment that discovered the Higgs boson ! Descend 100 metres underground and take a walk in the cathedral-sized cavern housing the 14,000-tonne CMS detector. Ask Higgs hunters and other scientists just about anything, be it questions about their work, particle physics or the engineering challenges of building CMS.  On surface no restricted access  Point 5 will be abuzz all day long with activities for all ages, including literally "cool" cryogenics shows featuring the world's fastest ice-cream maker, dance performances, and much more.

  7. Simulation of the CMS Resistive Plate Chambers

    CERN Document Server

    Hadjiiska, R; Pavlov, B; Petkov, P; Dimitrov, A; Beernaert, K; Cimmino, A; Costantini, S; Garcia, G; Lellouch, J; Marinov, A; Ocampo, A; Strobbe, N; Thyssen, F; Tytgat, M; Verwilligen, P; Yazgan, E; Zaganidis, N; Aleksandrov, A; Genchev, V; Iaydjiev, P; Rodozov, M; Shopova, M; Sultanov, G; Ban, Y; Cai, J; Xue, Z; Ge, Y; Li, Q; Qian, S; Avila, C; Chaparro, L F; Gomez, J P; Moreno, B Gomez; Oliveros, A F Osorio; Sanabria, J C; Assran, Y; Sharma, A; Abbrescia, M; Colaleo, A; Pugliese, G; Loddo, F; Calabria, C; Maggi, M; Benussi, L; Bianco, S; Colafranceschi, S; Piccolo, D; Carrillo, C; Iorio, O; Buontempo, S; Paolucci, P; Vitulo, P; Berzano, U; Gabusi, M; Kang, M; Lee, K S; Park, S K; Shin, S; Kim, M S; Seo, H; Goh, J; Choi, Y; Shoaib, M

    2013-01-01

    The Resistive Plate Chamber (RPC) muon subsystem contributes significantly to the formation of the trigger decision and reconstruction of the muon trajectory parameters. Simulation of the RPC response is a crucial part of the entire CMS Monte Carlo software and directly influences the final physical results. An algorithm based on the parametrization of RPC efficiency, noise, cluster size and timing for every strip has been developed. Experimental data obtained from cosmic and proton-proton collisions at $\\sqrt{s}=7$ TeV have been used for determination of the parameters. A dedicated validation procedure has been developed. A good agreement between the simulated and experimental data has been achieved.

  8. Tau Identification at CMS in Run II

    CERN Document Server

    Ojalvo, Isabel

    2016-01-01

    During LHC Long Shutdown 1 necessary upgrades to the CMS detector were made. CMS also took the opportunity to improve further particle reconstruction. A number of improvements were made to the Hadronic Tau reconstruction and Identification algorithms. In particular, electromag- netic strip reconstruction of the Hadron plus Strips (HPS) algorithm was improved to better model signal of pi0 from tau decays. This modification improves energy response and removes the tau footprint from isolation area. In addition to this, improvement to discriminators combining iso- lation and tau life time variables, and anti-electron in MultiVariate Analysis technique was also developed. The results of these improvements are presented and validation of Tau Identification using a variety of techniques is shown.

  9. CMS plotter graphics training manual

    Energy Technology Data Exchange (ETDEWEB)

    Cawby, R.D.

    1981-03-01

    This manual includes explanations of several graphics programs that use a Conversation Monitor System (CMS) terminal and a table-top plotter to produce a copy on bond paper or transparency film. 13 figures.

  10. Inauguration of the CMS solenoid

    CERN Multimedia

    Maximilien Brice

    2005-01-01

    In early 2005 the final piece of the CMS solenoid magnet arrived, marked by this ceremony held in the CMS assembly hall at Cessy, France. The solenoid is made up of five pieces totaling 12.5 m in length and 6 m in diameter. Weighing 220 tonnes, it will produce a 4 T magnetic field, 100 000 times the strength of the Earth's magnetic field and store enough energy to melt 18 tonnes of gold.

  11. Dark Matter searches at CMS

    CERN Document Server

    Kumar, Ashok

    2016-01-01

    This talk describes searches for directly produced Dark Matter particles in CMS. The searches are performed using the datasets recorded with the CMS detector in proton-proton collisions at center-of-mass energies of 8 and 13 TeV. Final states with a monojet, monophoton, and monolepton signature are among the final states considered, as well as dark-matter particles produced in association with bottom and top quarks.

  12. Forward energy measurement with CMS

    CERN Document Server

    Kheyn, Lev

    2016-01-01

    Energy flow is measured in the forward region of CMS at pseudorapidities up to 6.6 in pp interactions at 13 TeV with forward (HF) and very forward (CASTOR) calorimeters. The results are compared to model predictions. The CMS results at different center-of-mass energies are intercompared using pseudorapidity variable shifted by beam rapidity, thus studying applicability of hypothesis of limiting fragmentation.

  13. The CMS detector before closure

    CERN Multimedia

    Patrice Loiez

    2006-01-01

    The CMS detector before testing using muon cosmic rays that are produced as high-energy particles from space crash into the Earth's atmosphere generating a cascade of energetic particles. After closing CMS, the magnets, calorimeters, trackers and muon chambers were tested on a small section of the detector as part of the magnet test and cosmic challenge. This test checked the alignment and functionality of the detector systems, as well as the magnets.

  14. QCD Physics Potential of CMS

    CERN Document Server

    Rabbertz, Klaus

    2009-01-01

    In view of the approaching LHC operation the feasibility and accuracy of QCD measurements with the CMS experiment at the Large Hadron Collider (LHC) involving hadrons and jets are discussed. This summary is based on analyses performed at CMS for center-of-mass energies of 10 as well as 14 TeV assuming event numbers ranging from some days of data taking up to 100/pb of integrated luminosity with proton-proton collisions.

  15. CMS multicore scheduling strategy

    Energy Technology Data Exchange (ETDEWEB)

    Perez-Calero Yzquierdo, Antonio [Madrid, CIEMAT; Hernandez, Jose [Madrid, CIEMAT; Holzman, Burt [Fermilab; Majewski, Krista [Fermilab; McCrea, Alison [UC, San Diego

    2014-01-01

    In the next years, processor architectures based on much larger numbers of cores will be most likely the model to continue 'Moore's Law' style throughput gains. This not only results in many more jobs in parallel running the LHC Run 1 era monolithic applications, but also the memory requirements of these processes push the workernode architectures to the limit. One solution is parallelizing the application itself, through forking and memory sharing or through threaded frameworks. CMS is following all of these approaches and has a comprehensive strategy to schedule multicore jobs on the GRID based on the glideinWMS submission infrastructure. The main component of the scheduling strategy, a pilot-based model with dynamic partitioning of resources that allows the transition to multicore or whole-node scheduling without disallowing the use of single-core jobs, is described. This contribution also presents the experiences made with the proposed multicore scheduling schema and gives an outlook of further developments working towards the restart of the LHC in 2015.

  16. CMS Multicore Scheduling Strategy

    CERN Document Server

    Perez-Calero Yzquierdo, Antonio

    2014-01-01

    In the next years, processor architectures based on much larger numbers of cores will be most likely the model to continue Moores Law style throughput gains. This not only results in many more jobs in parallel running the LHC Run 1 era monolithic applications. Also the memory requirements of these processes push the workernode architectures to the limit. One solution is parallelizing the application itself, through forking and memory sharing or through threaded frameworks. CMS is following all of these approaches and has a comprehensive strategy to schedule multi-core jobs on the GRID based on the glideIn WMS submission infrastructure. We will present the individual components of the strategy, from special site specific queues used during provisioning of resources and implications to scheduling; to dynamic partitioning within a single pilot to allow to transition to multi-core or whole-node scheduling on site level without disallowing single-core jobs. In this presentation, we will present the experiences mad...

  17. The CMS crystal calorimeter

    CERN Document Server

    Lustermann, W

    2004-01-01

    The measurement of the energy of electrons and photons with very high accuracy is of primary importance far the study of many physics processes at the Large Hadron Collider (LHC), in particular for the search of the Higgs Boson. The CMS experiment will use a crystal calorimeter with pointing geometry, almost covering 4p, as it offers a very good energy resolution. It is divided into a barrel composed of 61200 lead tungstate crystals, two end-caps with 14648 crystals and a pre-shower detector in front of the end-cap. The challenges of the calorimeter design arise from the high radiation environment, the 4 Tesla magnetic eld, the high bunch crossing rate of 40 MHz and the large dynamic range, requiring the development of fast, radiation hard crystals, photo-detectors and readout electronics. An overview of the construction and design of the calorimeter will be presented, with emphasis on some of the details required to meet the demanding performance goals. 19 Refs.

  18. Recent CMS Results

    Directory of Open Access Journals (Sweden)

    Dorigo Tommaso

    2014-04-01

    Full Text Available The CMS experiment obtained a large number of groundbreaking results from the analysis of 7- and 8-TeV proton-proton collisions produced so far by the Large Hadron Collider at CERN. In this brief summary only a few of those results will be discussed. The new scalar discovered in 2012 has been studied in detail and all its characteristics have been found in agreement with standard model predictions for a Brout-Englert-Higgs boson. The large sample of top quark events collected in 2011 and 2012 have allowed world-class measurements of its mass; the combination of those results is Mt = 173.49 ± 0.36 ± 0.91 GeV. The rare decay Bs0 → μμ has been observed and found in agreement with standard model predictions; the search for the rare decay B0 → μμ has allowed to set a 95% CL limit on the branching fraction at 1.1 × 10−9. These two results strongly constrain new physics models.

  19. A new dawn for CMS

    CERN Multimedia

    2007-01-01

    Supported by a gigantic crane and a factory-size room full of enthusiasm, the central barrel of CMS made its final journey underground on 28 February. The central section of the CMS detector starts its dramatic 10-hour descent underground.Several hours (and 100 metres) later, the massive barrel rests on the cavern floor. CMS scientists, journalists, photographers and members of the transport crew basked in the final rays of the 'solenoid-set' on 28 February as the central barrel of the CMS detector sinks below the horizon and began its ten-hour descent into the cavern 100 metres below. Thirteen metres long and weighing as much as five jumbo jets (1920 tonnes), the barrel is the largest of the 15 chunks of CMS detector that are being lowered one by one into the cavern. 'This is a challenging feat of engineering, as there are just 20 cm of leeway between the detector and the walls of the shaft,' said Austin Ball, Technical Coordinator of CMS. The section of the detector, which contains the solenoid of the magne...

  20. CMS DT Upgrade The Sector Collector Relocation

    CERN Document Server

    Navarro Tobar, Alvaro

    2015-01-01

    The Sector Collector relocation is the first stage of the upgrade program for the Drift Tubes subdetector of the CMS experiment. It was accomplished during Long Shutdown 2013-2014, and consisted in the relocation of the second-level trigger and readout electronics from the experimental to the service cavern, relieving the environmental constraints and improving accessibility for maintenance and upgrade. Extending the electrical links would degrade reliability, so the information is converted to optical with a custom system capable of dealing with the DC-unbalanced data. Initially, present electronics are used, so optical-to-copper conversion has also been installed.

  1. Top quark measurements in the CMS experiment

    CERN Document Server

    Lista, Luca

    2017-01-01

    Experimental results on top-quark physics obtained at the CMS experiment are reported based on the data recorded at centre-of-mass energy up to 13 TeV. Inclusive and differential cross sections for both top-quark pair and single top-quark production are presented, as well as measurements of top-quark properties in production and decay, and searches for anomalous couplings. The presented measurements test theoretical predictions, including recent perturbative QCD calculations, provide constraints of fundamental standard model parameters, and set limits on physics beyond the standard model.

  2. Jets in Heavy Ion Collisions with CMS

    CERN Document Server

    Salur, Sevil

    2016-01-01

    Jet physics in heavy ion collisions is a rich field which has been rapidly evolving since the first observations of medium interactions at RHIC through back-to-back hadron correlations and at LHC via reconstructed jets. In order to completely characterize the final state via jet-medium interactions and distinguish between competing energy loss mechanisms complementary and robust jet observables are investigated. Latest developments of jet finding techniques and their applications to heavy ion environments are discussed with an emphasis given on experimental results from CMS experiment.

  3. Study of HH production at CMS

    CERN Document Server

    Oliveira, Alexandra

    2015-01-01

    The production of the pairs of higgs bosons provides a direct handle on the structure of the Higgs field potential.While the di-higgs bosons production within the SM is very small and essentially out of the experimental reach within the Run I or II, several beyond SM theories foresee an enhancement that can be already probed with the available data. First searches for an inclusively produced heavy resonance that decays in pairs of higgs bosons within BSM theories, made using data collected during Run I by the CMS collaboration, are presented.

  4. QCD in Higgs and BSM Results from the ATLAS and CMS Experiments

    CERN Document Server

    Tompkins, Lauren; The ATLAS collaboration

    2015-01-01

    Advances in theoretical calculations of QCD processes and modeling of colored objects have underpinned the success of the ATLAS and CMS Run I LHC measurements of the Higgs boson and searches for physics beyond the Standard Model. In this talk, I will cover selected recent results from the two experiments which illustrate the ways in which QCD calculations and models are used. I will additionally highlight areas in which uncertainties from these calculations and models are comparable to the experimental uncertainties, motivating further theoretical work.

  5. Debugging Data Transfers in CMS

    CERN Document Server

    Bagliesi, G; Bloom, K; Bockelman, B; Bonacorsi, D; Fisk, I; Flix, J; Hernandez, J; D'Hondt, J; Kadastik, M; Klem, J; Kodolova, O; Kuo, C M; Letts, J; Maes, J; Magini, N; Metson, S; Piedra, J; Pukhaeva, N; Tuura, L; Sonajalg, S; Wu, Y; Van Mulders, P; Villella, I; Wurthwein, F

    2010-01-01

    The CMS experiment at CERN is preparing for LHC data taking in several computing preparation activities. In early 2007 a traffic load generator infrastructure for distributed data transfer tests called the LoadTest was designed and deployed to equip the WLCG sites that support CMS with a means for debugging, load-testing and commissioning data transfer routes among CMS computing centres. The LoadTest is based upon PhEDEx as a reliable, scalable data set replication system. The Debugging Data Transfers (DDT) task force was created to coordinate the debugging of the data transfer links. The task force aimed to commission most crucial transfer routes among CMS sites by designing and enforcing a clear procedure to debug problematic links. Such procedure aimed to move a link from a debugging phase in a separate and independent environment to a production environment when a set of agreed conditions are achieved for that link. The goal was to deliver one by one working transfer routes to the CMS data operations team...

  6. The CMS Outer Hadron Calorimeter

    CERN Document Server

    Acharya, Bannaje Sripathi; Banerjee, Sunanda; Banerjee, Sudeshna; Bawa, Harinder Singh; Beri, Suman Bala; Bhandari, Virender; Bhatnagar, Vipin; Chendvankar, Sanjay; Deshpande, Pandurang Vishnu; Dugad, Shashikant; Ganguli, Som N; Guchait, Monoranjan; Gurtu, Atul; Kalmani, Suresh Devendrappa; Kaur, Manjit; Kohli, Jatinder Mohan; Krishnaswamy, Marthi Ramaswamy; Kumar, Arun; Maity, Manas; Majumder, Gobinda; Mazumdar, Kajari; Mondal, Naba Kumar; Nagaraj, P; Narasimham, Vemuri Syamala; Patil, Mandakini Ravindra; Reddy, L V; Satyanarayana, B; Sharma, Seema; Singh, B; Singh, Jas Bir; Sudhakar, Katta; Tonwar, Suresh C; Verma, Piyush

    2006-01-01

    The CMS hadron calorimeter is a sampling calorimeter with brass absorber and plastic scintillator tiles with wavelength shifting fibres for carrying the light to the readout device. The barrel hadron calorimeter is complemented with a outer calorimeter to ensure high energy shower containment in CMS and thus working as a tail catcher. Fabrication, testing and calibrations of the outer hadron calorimeter are carried out keeping in mind its importance in the energy measurement of jets in view of linearity and resolution. It will provide a net improvement in missing $\\et$ measurements at LHC energies. The outer hadron calorimeter has a very good signal to background ratio even for a minimum ionising particle and can hence be used in coincidence with the Resistive Plate Chambers of the CMS detector for the muon trigger.

  7. The CMS Detector Control System

    CERN Document Server

    Gomez-Reino Garrido, Robert

    2009-01-01

    The Compact Muon Solenoid (CMS) experiment at CERN is one of the Large Hadron Collider multi-purpose experiments. Its large subsystems size sum up to around 6 million Detector Control System (DCS) channels to be supervised. A cluster of ~100 servers is needed to provide the required processing resources. To cope with such a size a scalable approach has been chosen factorizing the DCS system as much as possible. CMS DCS has made a clear division between its computing resources and functionality by creating a computing framework allowing for plugging in functional components. DCS components are developed by the subsystems expert groups while the computing infrastructure is developed centrally. To ease the component development task, a framework based on PVSSII [1] has been developed by the CERN Joint Controls Project [2] (JCOP). This paper describes the current status of CMS Detector Control System, giving an overview of the DCS computing infrastructure, the integration of DCS subsystem functional components an...

  8. CMS upgrade and future plans

    Directory of Open Access Journals (Sweden)

    Hoepfner Kerstin

    2015-01-01

    Full Text Available CMS plans for operation at the LHC phase-II unprecedented in terms of luminosity thus resulting in serious consequences for detector performance. To achieve the goal to maintain the present excellent performance of the CMS detector, several upgrades are necessary. To handle the high phase-II data rates, the readout and trigger systems are redesigned using recent technology developments. The high particle rates will accelerate detector aging and require replacement of the tracker and forward calorimeters. In addition, the muon system will be extended.

  9. First two barrel ECAL supermodules inserted in CMS HCAL

    CERN Multimedia

    K.Bell

    2006-01-01

    The first two barrel "supermodules" for the CMS Electromagnetic Calorimeter (ECAL) have been inserted into the barrel hadron calorimeter (HCAL) in the experimental hall (called SX5) in Cessy in preparation for the forthcoming magnet test and cosmic challenge (MTCC). Each of the two supermodules contains 1700 lead tungstate crystals in glass-fibre alveolar support structures, with associated avalanche photodiodes (APDs, for scintillation light detection), electronics and cooling system. The barrel ECAL will consist of 36 supermodules, many of which have already been produced (see CERN Bulletin 17-18, 2006). Team from CMS ECAL, CMS Integration and CEA-DAPNIA were involved in the insertion, with the production/integration of the supermodules themselves involving many technicians, engineers and physicists from many institutes. From left to right: Olivier Teller, Maf Alidra and Lucien Veillet.

  10. Content Management System (CMS)

    OpenAIRE

    Καλτουρουμίδης, Κυριάκος Ο.

    2012-01-01

    Ένα σύστημα διαχείρισης περιεχομένων (content management system - CMS) είναι η συλλογή των διαδικασιών με τις οποίες μπορεί να γίνει διαχείριση της ροής εργασιών σε ένα συνεργατικό περιβάλλον. Αυτές οι διαδικασίες θα πρέπει να επιτρέπουν σε πολλά άτομα να συμμετέχουν και να μοιράζονται αποθηκευμένα δεδομένα, να ελέγχεται η πρόσβαση στα δεδομένα με βάση τους ρόλους των χρηστών, να βοηθείται η εύκολη αποθήκευση και ανάκτηση των δεδομένων, να διευκολύνεται η σύνταξη εκθέσεων και η επικοινωνία με...

  11. A novel totivirus and piscine reovirus (PRV in Atlantic salmon (Salmo salar with cardiomyopathy syndrome (CMS

    Directory of Open Access Journals (Sweden)

    Nederbragt Alexander J

    2010-11-01

    Full Text Available Abstract Background Cardiomyopathy syndrome (CMS is a severe disease affecting large farmed Atlantic salmon. Mortality often appears without prior clinical signs, typically shortly prior to slaughter. We recently reported the finding and the complete genomic sequence of a novel piscine reovirus (PRV, which is associated with another cardiac disease in Atlantic salmon; heart and skeletal muscle inflammation (HSMI. In the present work we have studied whether PRV or other infectious agents may be involved in the etiology of CMS. Results Using high throughput sequencing on heart samples from natural outbreaks of CMS and from fish experimentally challenged with material from fish diagnosed with CMS a high number of sequence reads identical to the PRV genome were identified. In addition, a sequence contig from a novel totivirus could also be constructed. Using RT-qPCR, levels of PRV in tissue samples were quantified and the totivirus was detected in all samples tested from CMS fish but not in controls. In situ hybridization supported this pattern indicating a possible association between CMS and the novel piscine totivirus. Conclusions Although causality for CMS in Atlantic salmon could not be proven for either of the two viruses, our results are compatible with a hypothesis where, in the experimental challenge studied, PRV behaves as an opportunist whereas the totivirus might be more directly linked with the development of CMS.

  12. JINR participation in the CMS project

    CERN Document Server

    Golutvin, I A

    2002-01-01

    The physics potential and the prospects of future experiments at the CMS detector of the Large Hadron Collider (LHC) at CERN are discussed. A status report is given on the research, development, and construction of the CMS endcap detectors for which JINR bears the full responsibility in the framework of the CMS collaboration. (7 refs).

  13. CMS 2012 data already exceed 2011 sample

    CERN Multimedia

    2012-01-01

    In just over two months of operations in 2012, CMS has recorded more data than in the 2011 run. As of the short technical stop starting 18 June, the LHC had delivered 6.65 fb−1 of collisions to CMS, of which CMS has recorded 6.15 fb−1, at an average efficiency of over 92%.

  14. 42 CFR 401.108 - CMS rulings.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false CMS rulings. 401.108 Section 401.108 Public Health... GENERAL ADMINISTRATIVE REQUIREMENTS Confidentiality and Disclosure § 401.108 CMS rulings. (a) After... regulations, but which has been adopted by CMS as having precedent, may be published in the Federal...

  15. Groot Brak (CMS3)

    CSIR Research Space (South Africa)

    Morant, PD

    1983-12-01

    Full Text Available The Great Brak estuary has been endowed with great scenic beauty and recreational potential. The estuary and environs thus offer a great challenge for progressive development with the needs of existing industries and residential areas having...

  16. CERN Open Days CMS Posters

    CERN Multimedia

    Davis, Siona Ruth

    2016-01-01

    Themes: 1) You are here (location P5, Cessy) 2) CERN 3) LHC 4) CMS Detector 5) Magnet 6) Subdetectors (Tracker, ECAL, HCAL, Muons) 7) Trigger and Data Acquisition 8) Collaboration 9) Site Geography 10) Construction 11) Lowering and Installation 12) Physics

  17. Machine Learning applications in CMS

    CERN Document Server

    CERN. Geneva

    2017-01-01

    Machine Learning is used in many aspects of CMS data taking, monitoring, processing and analysis. We review a few of these use cases and the most recent developments, with an outlook to future applications in the LHC Run III and for the High-Luminosity phase.

  18. A productive year for CMS

    CERN Multimedia

    2010-01-01

      Some of the many results obtained by CMS since the start of data-taking in 2010. If you have any comments / suggestions please contact the editors: Marzena Lapka (marzena.lapka@cern.ch) and Achintya Rao (achintya.rao@cern.ch)

  19. CMS launches new educational tools

    CERN Multimedia

    Corinne Pralavorio

    2014-01-01

    On 5 and 11 November, almost 90 pupils from the Fermi scientific high school in Livorno, Italy, took part in two Masterclass sessions organised by CMS.   CMS Masterclass participants.  The pupils took over a hall at CERN for an afternoon to test a new software tool called CIMA (CMS Instrument for Masterclass Analysis) for the first time. The software simplifies the process of recording results and reduces the number of steps required to enter data. During the exercise, each group of pupils had to analyse about a hundred events from the LHC. For each event, the budding physicists determined whether what they saw was a candidate W boson, Z boson or Higgs boson, identified the decay mode and entered key data. At the end of the analysis, they used the results to reconstruct a mass diagram. CIMA was developed by a team of scientists from the University of Aachen, Germany, the University of Notre-Dame, United States, and CERN. CMS has also added yet another educational tool to its already l...

  20. SUSY searches at the CMS

    CERN Document Server

    Kazana, Malgorzata

    2016-01-01

    Results of the 2015 early searches for supersymmetric particles obtained by the CMS experiment with 13\\,TeV data are reviewed.With an integrated luminosity of 2.2\\,fb$^{-1}$, limits on the gluino mass have been lifted up to higher values with respect to previous limits from 19.5\\,fb$^{-1}$ of 8\\,TeV data.

  1. Heavy flavor results from CMS

    CERN Document Server

    Ronchese, Paolo

    2017-01-01

    Heavy flavor particles produced in LHC $pp$ collisions at $7, 8,$ and $13~\\mathrm{TeV}$ constitute an excellent opportunity to test the standard model and probe for new physics effects. Recent results by the CMS Collaboration on heavy flavor production and decays are presented.

  2. Searches for supersymmetry at CMS

    Energy Technology Data Exchange (ETDEWEB)

    Collaboration: F. Giordano on behalf of the CMS Collaboration

    2017-11-15

    Among the most promising prospects for a theory of physics beyond the standard model is supersymmetry. In this talk, the latest results from the CMS experiment at the LHC on searches for supersymmetry produced through strong production and electroweak production channels are presented using 20/fb of data from the 8 TeV LHC run, with particular focus on gluino and stop searches.

  3. CMS the art of science

    CERN Document Server

    Hoch, Michael; Denegri, Daniel; Preece, Stephen; Storr, Mick

    2016-01-01

    The physicist as artist: Michael Hoch photographed the extraordinary science cabinet of wonders CMS (the Compact Muon Solenoid Experiment) at CERN. With a foreword by François Englert, 2013 Nobel Laureate in Physics and co-discoverer of the Higgs boson.

  4. CMS - The Compact Muon Solenoid

    CERN Multimedia

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Sharma, R K; Santoro, A; Lassila-perini, K M; Tuominiemi, J; Voutilainen, M A; Jarvinen, T T; Gross, L O; Le bihan, A; Fuks, B; Kieffer, E; Pansanel, J; Jansova, M; D'hondt, J; Van parijs, I M; Abuzeid hassan, S A; Bilin, B; Beghin, D; Soultanov, G; Vankov, I D; Konstantinov, P B; Marra da silva, J; De souza santos, A; Arruda ramalho, L; Ingram, Q; Renker, D; Erdmann, W; Molinero vela, A; Fernandez bedoya, C; Bachiller perea, I; Chipaux, R; Faure, J D; Hamel de monchenault, G; Mandjavidze, I; Rander, J; Ferri, F; Leroy, C L; Ghosh, S S; Machet, M; Nagy, M I; Felcini, M; Kaur, S; Saizu, M A; Civinini, C; Latino, G; Laudati, A; Fienga, F; De nardo, G; Checchia, P; Ronchese, P; Vanini, S; Fantinel, S; Salvini, P; Gaioni, L; Fabris, L; Cecchi, C; Leonardi, R; Arneodo, M; Ruspa, M; Traczyk, P W; Pacher, L; Rabadan trejo, R I; Mondragon herrera, C A; Golutvin, I; Zhiltsov, V; Melnichenko, I; Mjavia, D; Cheremukhin, A; Zubarev, E; Tikhonenko, E; Kalagin, V; Alexakhin, V; Mitsyn, V; Shulha, S; 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Verweij, M; Da silva gomes, D; Ben mimoun bel hadj, F; Bonnaud, J Y R; Canelli, F M; Bai, J; Qiu, J; Bian, J; Cheng, Y; Kukulies, C; Teroerde, M; Erdmann, M; Hebbeker, T; Zantis, F; Scheuch, F; Erdogan, Y; Campbell, A J; Kasemann, M; Lange, W; Raspiareza, A; Melzer-pellmann, I; Aldaya martin, M; Lewendel, B; Schmidt, R S; Lipka, E; Missiroli, M; Grados luyando, J M; Shevchenko, R; Babounikau, I; Steinbrueck, G; Peiffer, T; Vanhoefer, A; Ebrahimi, A; Stover, M; Niedziela, M A; Simonis, H J; Katkov, I; Colombo, F; Marco de lucas, R J; Lopez virto, A M; Jaramillo echeverria, R W; Hennion, P; Zghiche, A; Chiron, A; Romanteau, T; Beaudette, F; Valiyavalappil kizhakkepura, A A; Lobanov, A; Grasseau, G J; Pigard, P; Cadamuro, L; Pierre-emile, T B; El mamouni, H; Gouzevitch, M; Goldstein, J; Cussans, D G; Seif el nasr, S A; Smith, D; Titterton, A S; Ford, P J W; Olaiya, E O; Salisbury, J G; Paspalaki, G; Hidas, P; Kiss, T N; Zalan, P; Bartok, M; Shukla, P; Abbrescia, M; De filippis, N; Donvito, G; Radogna, R; Miniello, G; Gelmi, A; Capiluppi, P; Marcellini, S; Odorici, F; Bonacorsi, D; Genta, C; Ferri, G; Saviano, G; Ferrini, M; Minutoli, S; Fabbricatore, P; Tosi, S; Diemoz, M; Baccaro, S; Bartoloni, A; Margaroli, F; Talamo, I G; Kim, J Y; Oh, G; Lim, J H; Lee, J; Mohamad idris, F B; Md ali, M A B; Gani, A B; Cwiok, M; Doroba, K; Pyskir, A D; Martins galinhas, B E; Kim, V; Krivshich, A; Vorobyev, A; Ivanov, Y; Tarakanov, V; Lobodenko, A; Obikhod, T; Isayev, O; Kurov, O; Leonidov, A; Lvova, N; Kirsanov, M; Suvorova, O; Karneyeu, A; Demidov, S; Konoplyannikov, A; Popov, V; Pakhlov, P; Vinogradov, S; Klemin, S; Blinov, V; Skovpen, I; Chatrchyan, S; Grigorian, N; Kayis topaksu, A; Sunar cerci, D; Hos, I; Girgis chyla, S; Guler, Y; Kiminsu, U; Serin, M; Deniz, M; Turan, I; Eryol, F; Pozdnyakov, A; Liu, Z; Doan, T H; Hanlon, J E; Mcbride, P L; Pal, I; Verzocchi, M; Garren, L; Oleynik, G; Harris, R M; Bolla, G; Kowalkowski, J B; Evans, D E; Vaandering, E W; Patrick, J F; Rechenmacher, R; Prosser, A G; Messer, T A; Tiradani, A R; Rivera, R A; Jayatilaka, B A; Duarte, J M; Todri, A; Harr, R F; Richman, J D; Bhandari, R; Dordevic, M; Cirkovic, P; Mora herrera, C; Rosa lopes zachi, A; De paula carvalho, W; Kinnunen, R L A; Lehti, S T; Maeenpaeae, T H; Bloch, D; Chabert, E C; Rudolf, N G; Devroede, O; Skovpen, K; Deroover, K; Moreels, L; Lontkovskyi, D; Lenzi, T; De wolf, E A; Van mechelen, P; Van spilbeeck, A B E; Georgiev, L S; Novaes, S F; Vaz da silva filho, M; Costa, M A; Costa leal, B; Horisberger, R P; De la cruz, B; Willmott, C; Perez-calero yzquierdo, A M; Dejardin, M M; Mehta, A; Barbagli, G; Focardi, E; Lista, L; Passeggio, G; Thyssen, F D M; Breglio, G; Bacchetta, N; Gasparini, U; Pantano, D; Sgaravatto, M; Ventura, S; Zotto, P; Candelori, A; Pozzobon, N; Boletti, A; Benato, L; Magnani, A; Servoli, L; Postolache, V; Rossi, A; Ciangottini, D; Alunni solestizi, L; Maselli, S; Migliore, E; Amapane, N C; Shchelina, K; Lopez fernandez, R; Sanchez hernandez, A; Heredia de la cruz, I; Matveev, V; Kracikova, T; Shmatov, S; Vasilev, S; Kurenkov, A; Oleynik, D; Verkheev, A; Voytishin, N; Proskuryakov, A; Bogdanova, G; Petrova, E; Bagaturia, I; Tsamalaidze, Z; Fiori, F; Zhao, Z; Arcaro, D J; Barberis, E; Wamorkar, T; Wang, B; Ralph, D K; Velasco, M M; Anastassov, A I; Odell, N J; Sevova, S; Li, W; Merlo, J; Onel, Y; Mermerkaya, H; Moeller, A R; Haytmyradov, M; Dong, R; Bugg, W M; Ragghianti, G C; Delannoy sotomayor, A G; Thapa, K; Yagil, A; Gerosa, R A; Schmitz, E J; Kapustinsky, J S; Greene, S V; Zhang, L; Vlimant, J V; Mughal, A; Cury siqueira, S; Gershtein, Y; Arora, S R R; Lin, W X; Stickland, D P; Mc donald, K T; Pivarski, J M C; Higginbotham, S L; Rosenfield, M; Long, O R; Johnson, K F; Adams, T; Susa, T; Rykaczewski, H; Ge, Y; Liu, S; Li, J; Li, L; Bloom, K A; Monroy montanez, J A; Kunori, S; Wang, Z; Favart, D; Maltoni, F; Vidal marono, M; Francois, B A L; Delcourt, M; Markov, S I; Seez, C; Richards, A J; Ferguson, W; De wit, A M; Saoulidou, N; Chatziangelou, M; Karathanasis, G; Kontaxakis, P; Jones, J A; Strologas, J; Katsoulis, P; Dutt, S; Roy chowdhury, S; Bhardwaj, R; Purohit, A; Singh, B; Behera, P K; Spagnolo, P; Tonelli, G E; Fedi, G; Giannini, L; Poulios, S; Groote, J F; Untuc, B; Oztirpan, F O; Koseoglu, I; Luiggi lopez, E E; Krohn, M D; Hadley, N J; Shin, Y H; Safonov, A; Eusebi, R; Rose, A K; Erbacher, R D; Funk, G N; Pilot, J R; Klimenko, S; Matchev, K; Gleyzer, S; Wang, J; Bortignon, P; Curry, D A; Sun, W M; Soffi, L; Lantz, S R; Wright, D; Cline, D; Cousins jr, R D; Yang, X; Schnaible, C J; Dasgupta, A; Bradley, D C; Duric, S; Monzat, D; Dodd, L M; Tikalsky, J L; Kapusta, J; Gilbert, W J; Lesko, Z J; Marinelli, N; Wayne, M R; Heering, A H; Galanti, M; Han, J Y; Duh, Y; Roy, A; Arabgol, M; Hacker, T J; Salva, S; Petrov, V; Barychevski, V; Drobychev, G; Lobko, A; Conte, E R E; Kasprowicz, G H; Kyberd, P; Cole, J E; Reid, I D; Lopez, J M; Salazar gonzalez, C A; Benzon, A M; Pelagio, L; Walsh, M F; Carpinteyro bernardino, S; Postnov, A; Lelas, D; Vaitkus, J V; Jurciukonis, D; Bacevieius, G; Sulmanas, B; Ahmad, A; Ahmed, W; Jalil, S H; Kahl, W E; Taylor, D R; Choi, Y I; Roy, T; Guerrero ibarra, D F; Schoenenberger, M A; Khateri, P; Safarzadeh samani, B; Etesami, S M; Fiorini, E; Pullia, A; Magni, S; Fiorendi, S; Sanabria arenas, J C; Florez bustos, C A; Holguin coral, A; Mendez, H; Srimanobhas, N; Jaikar, A H; Arteche gonzalez, F J; Call, K R; Calderon monroy, M A; Bakhet, N; Aly mohamed mahmoud mohamed, R; Elkafrawy, T; Hammad, A H A; Abdelmaguid, A; Mal, P K; Yuan, L; Al kindi, A; Lomidze, I; Prangishvili, I; Adamov, G; Dube, S S; Dugad, S; Mohanty, G B; Bhat, M A; Bheesette, S; Abou kors, D J; Nakad, Z S

    CMS is a general purpose proton-proton detector designed to run at the highest luminosity at the LHC. It is also well adapted for studies at the initially lower luminosities. The CMS Collaboration consists of over 1800 scientists and engineers from 151 institutes in 31 countries. The main design goals of CMS are: \\begin{enumerate} \\item a highly performant muon system, \\item the best possible electromagnetic calorimeter \\item high quality central tracking \\item hermetic calorimetry \\item a detector costing less than 475 MCHF. \\end{enumerate} All detector sub-systems have started construction. Engineering Design Reviews of parts of these sub-systems have been successfully carried-out. These are held prior to granting authorization for purchase. The schedule for the LHC machine and the experiments has been revised and CMS will be ready for first collisions now expected in April 2006. \\\\\\\\ ~~~~$\\bullet$ Magnet \\\\ The detector (see Figure) will be built around a long (13~m) and large bore ($\\phi$=5.9~m) high...

  5. Strong Production SUSY Searches at ATLAS and CMS

    CERN Document Server

    Marshall, Z L

    2015-01-01

    The results of searches for strongly-produced supersymmetry at the Large Hadron Collider by the ATLAS and CMS collaborations are presented. Several of the historically strongest zero-and one-lepton final state searches have been updated to include multi-bin fits and combinations. In addition, new two-lepton final state search results are shown from CMS and ATLAS, which show 2.6 and 3.0 standard deviation excesses, respectively, above the standard model expectation, albeit in different regions of phase space. Both collaborations have also shown new searches that cover areas uncovered by previous searches, in both searches for light stops and searches for stealth supersymmetry.

  6. 45 CFR 150.203 - Circumstances requiring CMS enforcement.

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Circumstances requiring CMS enforcement. 150.203... CARE ACCESS CMS ENFORCEMENT IN GROUP AND INDIVIDUAL INSURANCE MARKETS CMS Enforcement Processes for... requiring CMS enforcement. CMS enforces HIPAA requirements to the extent warranted (as determined by CMS)...

  7. The Phase-1 Upgrade of the CMS Pixel Detector

    CERN Document Server

    Klein, Katja

    2016-01-01

    The CMS experiment features a pixel detector with three barrel layers and two disks per side, corresponding to an active silicon area of 1\\,m$^2$. The detector delivered high-quality data during LHC Run~1. However, the CMS pixel detector was designed for the nominal instantaneous LHC luminosity of $1\\cdot 10^{34}\\,$cm$^{-2}$s$^{-1}$. It is expected that the instantaneous luminosity will increase and reach twice the design value before Long Shutdown 3, scheduled for 2023. Under such conditions, the present readout chip would suffer from data loss due to buffer overflow, leading to significant inefficiencies of up to~16\\,\\%. The CMS collaboration is presently constructing a new pixel detector to replace the present device during the winter shutdown 2016/2017. The design of this new detector will be outlined, the construction status summarized and the performance described.

  8. The Phase-1 upgrade of the CMS pixel detector

    Science.gov (United States)

    Klein, Katja

    2017-02-01

    The CMS experiment features a pixel detector with three barrel layers and two discs per side, corresponding to an active silicon area of 1 m2. The detector delivered high-quality data during LHC Run 1. However, the CMS pixel detector was designed for the nominal instantaneous LHC luminosity of 1 ·1034cm-2s-1 . It is expected that the instantaneous luminosity will increase and reach twice the design value before Long Shutdown 3, scheduled for 2023. Under such conditions, the present readout chip would suffer from data loss due to buffer overflow, leading to significant inefficiencies of up to 16%. The CMS collaboration is presently constructing a new pixel detector to replace the present device during the winter shutdown 2016/2017. The design of this new detector will be outlined, the construction status summarized and the performance described.

  9. Design of CMS Beam Halo Monitor system

    CERN Document Server

    AUTHOR|(CDS)2078842

    2015-01-01

    A fast and directional monitoring system for the CMS experiment is designed to provide an online, bunch-by-bunch measurement of beam background induced by beam halo interactions, separately for each beam. The background detection is based on Cherenkov radiation produced in synthetic fused silica read out by a fast, UV sensitive photomultiplier tube. Twenty detector units per end will be azimuthally distributed around the rotating shielding of CMS, covering ~408 cm2 at 20.6m from the interaction point, at a radius of ~180 cm. The directional and fast response of the system allows the discrimination of the background particles from the dominant flux in the cavern induced by pp collision debris, produced within the 25 ns bunch spacing. A robust multi-layered shielding will enclose each detector unit to protect the photomultiplier tube from the magnetic field and to eliminate the occupancy from low energy particles. The design of the front-end units is validated by experimental results. An overview of the new sy...

  10. CMS bottomonia results from Run I

    Science.gov (United States)

    Jo, Mihee

    2016-12-01

    Bottomonia are important probes of the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. The production cross section of the three ϒ states (1S, 2S, 3S) is measured separately using the Compact Muon Solenoid (CMS) experimental apparatus, in pp and PbPb collisions at 2.76 TeV. A strong suppression is observed in PbPb collisions, by up to a factor of 2 and 10 for the ϒ(1S) and ϒ(2S) respectively. The ϒ(3S) was not observed in PbPb collisions, being suppressed by more than 7 at the 95% confidence level. This suppression was seen to also depend on centrality, but not significantly on transverse momentum or rapidity. A similar suppression pattern of the excited states (2S and 3S) as compared to the ground state (1S), though less pronounced than in PbPb data, was observed also when analyzing the pPb data at 5.02 TeV center of mass collision energy. A surprising dependence of the excited over the ground state ratio, as a function of the global event activity, was also found in pPb data. The three states are also observed to be individually more produced in events with more activity, for the three collision systems. In this proceeding, the final CMS results on bottomonia production in the three collisions systems will be presented.

  11. Characterization of the CMS Pixel Detectors

    CERN Document Server

    Gu, Weihua

    2002-01-01

    In 2005 the Large Hadron Collider (LHC) will start the pp collisions at a high luminosity and at a center of mass energy of 14 TeV. The primary goal of the experimental programme is the search of the Higgs boson(s) and the supersymmetric particles. The programme is also proposed to detect a range of diverse signatures in order to provide guidance for future physics. The pixel detector system makes up the innermost part of the CMS experiment, which is one of the two general purpose detectors at the LHC. The main tasks of the system are vertex detection and flavor tagging. The high luminosity and the high particle multiplicity as well as the small bunch spacing at the LHC impose great challenges on the pixel detectors: radiation hardness of sensors and electronics, fast signal processing and a high granularity are the essential requirements. This thesis concentrates on the study of the suitability of two test stands, which are implemented to characterize the CMS pixel detectors: one is con-cerned with test puls...

  12. Study of the impact of environmental parameters on the operation of CMS RPCs

    CERN Document Server

    Assran, Yasser

    2011-01-01

    CMS (Compact Muon Solenoid) is a general purpose detector designed to run at the highest luminosity at Large Hadron Collider (LHC), CERN, Geneva, Switzerland. The muon system of the CMS experiment relies on Drift Tubes (DT), Cathode Strip Chambers (CSC) and Resistive Plate Chambers (RPC). RPCs are dedicated for the first level muon trigger and they are characterized by bakelite electrodes delimited in a specialized gas volume filled with operational gas mixture. This analysis has been done for the RPC chambers installed in CMS experiment at CERN. The Currents of CMS RPCs chambers are analyzed as a function of environmental parameters such as Temperature, Humidity and pressure, which are important for the operation of the muon detector system. A novel Neural Network approach has been used to analyze the data and to build a model using experimental measurements and combining the results of the simulations. Data from RPC Chambers in CMS experiment are taken and compared to the results from neural Network.

  13. Gamtoos (CMS48)

    CSIR Research Space (South Africa)

    Estuarine and Coastal Research Unit, ECRU

    1981-04-01

    Full Text Available The Gamtoos has the fourth largest catchment of all the Cape rivers, with an area of 34 438 km2 which extends right up into the Great Karoo. Two large tributaries drain the eastern extremity of the Nuweveld Mountain range and the western slopes...

  14. Experimental Investigation of Macro-Bending Loss in Large Mode Area Photonic Crystal Fibers

    Institute of Scientific and Technical Information of China (English)

    Yinian Zhu; Joo Hin Chong; Ping Shum; Chao Lu

    2003-01-01

    We measured macro-bending losses for two large mode area photonic crystal fibers. Experimental results show that macro-bending loss and loss window are dependent on the parameter d/Λ and number of air-holes ring in the cladding.

  15. Experimental Investigation of Macro-Bending Loss in Large Mode Area Photonic Crystal Fibers

    Institute of Scientific and Technical Information of China (English)

    Joo; Hin; Chong; Ping; Shum

    2003-01-01

    We measured macro-bending losses for two large mode area photonic crystal fibers. Experimental results show that macro-bending loss and loss window are dependent on the parameter d/∧ and number of air-holes ring in the cladding.

  16. Experimental study and simulation of a micro-discharge with limited cathode area

    CERN Document Server

    Dufour, Thierry; Dussart, Remi; Pitchford, L C; Sadeghi, N; Lefaucheux, P; Kulsreshath, M; Ranson, P

    2016-01-01

    We report in this paper simulation results and experimental measurements to characterize a micro-discharge generated in a single micro cavity device operating in helium. By spatially limiting the cathode surface area using a dielectric layer, we demonstrate the ability of the micro-discharge to work in a steady-state abnormal glow regime. The physical properties of this regime are discussed.

  17. CMS software deployment on OSG

    Energy Technology Data Exchange (ETDEWEB)

    Kim, B; Avery, P [University of Florida, Gainesville, FL 32611 (United States); Thomas, M [California Institute of Technology, Pasadena, CA 91125 (United States); Wuerthwein, F [University of California at San Diego, La Jolla, CA 92093 (United States)], E-mail: bockjoo@phys.ufl.edu, E-mail: thomas@hep.caltech.edu, E-mail: avery@phys.ufl.edu, E-mail: fkw@fnal.gov

    2008-07-15

    A set of software deployment tools has been developed for the installation, verification, and removal of a CMS software release. The tools that are mainly targeted for the deployment on the OSG have the features of instant release deployment, corrective resubmission of the initial installation job, and an independent web-based deployment portal with Grid security infrastructure login mechanism. We have been deploying over 500 installations and found the tools are reliable and adaptable to cope with problems with changes in the Grid computing environment and the software releases. We present the design of the tools, statistics that we gathered during the operation of the tools, and our experience with the CMS software deployment on the OSG Grid computing environment.

  18. HGCal Simulation Analyses for CMS

    CERN Document Server

    Bruno, Sarah Marie

    2015-01-01

    This summer, I approached the topic of fast-timing detection of photons from Higgs decays via simulation analyses, working under the supervision of Dr. Adolf Bornheim of the California Institute of Technology. My specific project focused on simulating the high granularity calorimeter for the Compact Muon Solenoid (CMS) experiment. CMS detects particles using calorimeters. The Electromagnetic Calorimeter (ECal) is arranged cylindrically to form a barrel section and two “endcaps.” Previously, both the barrel and endcap have employed lead tungstate crystal detectors, known as the “shashlik” design. The crystal detectors, however, rapidly degrade from exposure to radiation. This effect is most pronounced in the endcaps. To avoid the high expense of frequently replacing degraded detectors, it was recently decided to eliminate the endcap crystals in favor of an arrangement of silicon detectors known as the “High Granularity Calorimeter” (HGCal), while leaving the barrel detector technology unchanged. T...

  19. Moment of truth for CMS

    CERN Multimedia

    2006-01-01

    One of the first events reconstructed in the Muon Drift Tubes, the Hadron Calorimeter and elements of the Silicon Tracker (TK) at 3 Tesla. The atmosphere in the CMS control rooms was electric. Everbody was at the helm for the first full-scale testing of the experiment. This was a crunch moment for the entire collaboration. On Tuesday, 22 August the magnet attained almost its nominal power of 4 Tesla! At the same moment, in a tiny improvised control room, the physicists were keyed up to test the entire detector system for the first time. The first cosmic ray tracks appeared on their screens in the week of 15 August. The tests are set to continue for several weeks more until the first CMS components are lowered into their final positions in the cavern.

  20. DeepFlavour in CMS

    CERN Document Server

    CERN. Geneva

    2017-01-01

    Flavour-tagging of jets is an important task in collider based high energy physics and a field where machine learning tools are applied by all major experiments. A new tagger (DeepFlavour) was developed and commissioned in CMS that is based on an advanced machine learning procedure. A deep neural network is used to do multi-classification of jets that origin from a b-quark, two b-quarks, a c-quark, two c-quarks or light colored particles (u, d, s-quark or gluon). The performance was measured in both, data and simulation. The talk will also include the measured performance of all taggers in CMS. The different taggers and results will be discussed and compared with some focus on details of the newest tagger.

  1. Track Reconstruction Performance in CMS

    CERN Document Server

    Azzurri, Paolo

    2008-01-01

    The expected performance of track reconstruction with LHC events using the CMS silicon tracker is presented. Track finding and fitting is accomplished with Kalman Filter techniques that achieve efficiencies above 99\\% on single muons with $p_T >$1~GeV/c. Difficulties arise in the context of standard LHC events with a high density of charged particles, where the rate of fake combinatorial tracks is very large for low $p_T$ tracks, and nuclear interactions in the tracker material reduce the tracking efficiency for charged hadrons. Recent improvements with the CMS track reconstruction now allow to efficiently reconstruct charged tracks with $p_T$ down to few hundred MeV/c and as few as three crossed layers, with a very small fake fraction, by making use of an optimal rejection of fake tracks in conjunction with an iterative tracking procedure.

  2. H->cc at CMS

    CERN Document Server

    Ahmad, Ammara; CERN. Geneva. EP Department

    2016-01-01

    The discovery of a Higgs boson with a mass of 125 GeV was an extraordinary event for the CMS experiment and for particle physics as a whole. But to check whether this Higgs is the Standard Model (SM) Higgs boson or not depends on one of its fundamental properties i.e. it’s coupling to fermions. The sensitivity of Higgs decay to the fermionic final states (H->tau anti-tau, H->bottom anti-bottom) is still limited. Furthermore, the sensitivity to the coupling of the Higgs boson to fermions of the second generation is even smaller. Recently, significant developments have been made within the CMS Collaboration in the development of charm tagging. These improvements, together with the increased dataset available in LHC Run-2, will enhance significantly the sensitivity to the H->cc coupling. In this report I study the decay of Higgs to charm anti charm quark pair.

  3. Heavy Ion Physics in CMS

    CERN Document Server

    Baur, G; Chatrchyan, Serguei; Contardo, Didier; Damgov, Jordan; De Min, Alberto; Denegri, Daniel; Drapier, Olivier; Geist, Walter; Genchev, Vladimir; Haroutunian, Roger; Hayrapetyan, M G; Hencken, K; Jenkovszky, L L; Kartvelishvili, Vakhtang; Kharlov, Yuri; Kodolova, Olga; Kotlinski, Danek; Kruglov, Nikolai A; Kva, R

    2000-01-01

    This note summarizes the CMS potential for Heavy Ions Collisions studies. The main physics topic is the study of Y to muon pair decays in view of Y family supression studies, with a detailed discussion of muon reconstruction efficiencies and purities in conditions of central Pb-Pb collisions. We also discuss energy flow and impact parameter measurements, the observability of continuum muon pairs and of Z to mu + mu decays, and of jets and hard direct photons as a means to study jet quenching. We also discuss pA interactions as well as gamma-gamma physics. The instrumental specificities of CMS for heavy ion running are discussed, including trigger and data acquisition aspects.

  4. CMS Annual Report 2004

    Energy Technology Data Exchange (ETDEWEB)

    de la Rubia, T D; Shang, S P; Rennie, G; Fluss, M; Westbrook, C

    2005-07-29

    Glance at the articles in this report, and you will sense the transformation that is reshaping the landscape of materials science and chemistry. This transformation is bridging the gaps among chemistry, materials science, and biology--ushering in a wealth of innovative technologies with broad scientific impact. The emergence of this intersection is reinvigorating our strategic investment into areas that build on our strength of interdisciplinary science. It is at the intersection that we position our strategic vision into a future where we will provide radical materials innovations and solutions to our national-security programs and other sponsors. Our 2004 Annual Report describes how our successes and breakthroughs follow a path set forward by our strategic plan and four organizing research themes, each with key scientific accomplishments by our staff and collaborators. We have organized this report into two major sections: research themes and our dynamic teams. The research-theme sections focus on achievements arising from earlier investments while addressing future challenges. The dynamic teams section illustrates the directorate's organizational structure of divisions, centers, and institutes that support a team environment across disciplinary and institutional boundaries. The research presented in this annual report gives substantive examples of how we are proceeding in each of these four theme areas and how they are aligned with our national-security mission. By maintaining an organizational structure that offers an environment of collaborative problem-solving opportunities, we are able to nurture the discoveries and breakthroughs required for future successes.

  5. Dark matter searches with CMS

    CERN Document Server

    Jeitler, Manfred

    2016-01-01

    The existence of dark matter, indicated by astronomical observations, is one of the main proofs of physics beyond the standard model. Despite its abundance, dark matter has not been directly observed yet. This talk presents several searches for dark matter production in proton-proton collisions at 7, 8, and 13 TeV at the LHC, performed by the CMS collaboration. They are interpreted in terms of simplified models with different structures and mediators, as well as generic effective theory terms.

  6. Exotic Meson Searches at CMS

    Science.gov (United States)

    Durgut, Suleyman; CMS Collaboration

    2017-01-01

    Exotic meson spectroscopy searches at the LHC yielded interesting results. Using an integrated luminosity of 25 . 6fb-1 recorded in proton-proton collisions at √{ 7} TeV and √{ 8} TeV, CMS searched for enhancements in multi-lepton final states in the mass range below the ϒ(1 S) ϒ(1 S) mass. Results will be presented and discussed.

  7. Double parton scattering in CMS

    CERN Document Server

    Sunar Cerci, Deniz

    2017-01-01

    Recent results on the double parton scattering measurements performed using the proton-proton collision data collected with the CMS detector are presented. The observables, which are sensitive to double parton scattering, are investigated after being corrected for detector effects and selection efficiencies. Multivariate analysis techniques are used for increasing the sensitivity. The effective cross section, $\\sigma_{eff}$ is also extracted using different processes at various center-of-mass energies.

  8. Exotic quarkonium states at CMS

    CERN Document Server

    Cristella, Leonardo

    2016-01-01

    Using large data samples of di-muon events, CMS has performed detailed measurements and searches for new states in the field of exotic quarkonia. We report on measurements of the charmonium X(3872), and search for its counterpart in the bottomonium sector. The investigation of the B+ to J/psi phi K+ decay reveals two structures in the J/psi phi mass spectrum. For the one closest to the kinematical threshold, and compatible with the Y(4140) state by CDF, a few explanations have been suggested such as a tetraquark partner of the X(3872), a molecular partner of the Y(3940) or a charmonium hybrid. Charged Z charmonium-like states are particularly interesting as candidates for tetra-quark states. Results from CMS are foreseen to be provided by applying a full amplitude analysis method to the neutral B meson 3-body decays into J/psi(or psi(2S)) Kaon Pion. Searches for tetraquarks are also performed in CMS in the multi-lepton final states including J/psi and Y.

  9. Physics with the CMS detector

    CERN Document Server

    Green, D

    2009-01-01

    The CMS detector is a powerful instrument that was designed to discover physics beyond the Standard Model (SM). CMS plan to begin in 2009 by\\rediscovering" the SM. At lowest luminosity the underlying event and zero bias event will be measured. Next, jets at low Pt will be recorded and the spectra of Pt, mass, and scattering angle will be validated, both for dijets and photon + jet topologies, conrming the strong and EM sector of the SM. Since at the LHC the W cross section is 100 nb, early data on the W and Z cross section, W charge asymmetry, Z mass and width and Z decay asymmetry will serve to conrm the electroweak SM. Finally, the top cross section of 1 nb will provide a \\standard candle" for b jets, leptons and missing transverse energy (MET) all of which are crucial elements in searches beyond the SM. With this foundation, CMS will search for SUSY, extra dimensions and other signals of new Physics beyond the SM, some of which will be accessible in the data taken in 2009

  10. The CMS integration grid testbed

    Energy Technology Data Exchange (ETDEWEB)

    Graham, Gregory E.

    2004-08-26

    The CMS Integration Grid Testbed (IGT) comprises USCMS Tier-1 and Tier-2 hardware at the following sites: the California Institute of Technology, Fermi National Accelerator Laboratory, the University of California at San Diego, and the University of Florida at Gainesville. The IGT runs jobs using the Globus Toolkit with a DAGMan and Condor-G front end. The virtual organization (VO) is managed using VO management scripts from the European Data Grid (EDG). Gridwide monitoring is accomplished using local tools such as Ganglia interfaced into the Globus Metadata Directory Service (MDS) and the agent based Mona Lisa. Domain specific software is packaged and installed using the Distribution After Release (DAR) tool of CMS, while middleware under the auspices of the Virtual Data Toolkit (VDT) is distributed using Pacman. During a continuous two month span in Fall of 2002, over 1 million official CMS GEANT based Monte Carlo events were generated and returned to CERN for analysis while being demonstrated at SC2002. In this paper, we describe the process that led to one of the world's first continuously available, functioning grids.

  11. Upgrade of the CMS Tracker

    CERN Document Server

    Klein, Katja

    2013-01-01

    The performance of the Tracker of the CMS experiment, comprising of a pixel and a strip detector, has so far been excellent, as reflected in the wealth of beautiful physics results from CMS. However, the foreseen increases of both the instantaneous and the integrated luminosity by the LHC during the next ten years will necessitate a stepwise upgrade of the CMS tracking detector. \\\\ In the extended end-of-year shutdown 2016/17 the pixel detector will be exchanged. The new device is designed for an instantaneous luminosity of $2\\cdot 10^{34}$\\,cm$^{-2}$s$^{-1}$ and an integrated luminosity of 500\\,fb$^{-1}$. The number of layers will be increased from three to four in the barrel part and from two to three in the end caps, thus providing four-hit coverage over the full pseudorapidity range. A smaller beampipe allows the reduction of the radius of the innermost layer, improving the tracking performance. Further improvements include a new readout chip, reduction of material, and the installation of more effi...

  12. The CMS Integration Grid Testbed

    CERN Document Server

    Graham, G E; Aziz, Shafqat; Bauerdick, L.A.T.; Ernst, Michael; Kaiser, Joseph; Ratnikova, Natalia; Wenzel, Hans; Wu, Yu-jun; Aslakson, Erik; Bunn, Julian; Iqbal, Saima; Legrand, Iosif; Newman, Harvey; Singh, Suresh; Steenberg, Conrad; Branson, James; Fisk, Ian; Letts, James; Arbree, Adam; Avery, Paul; Bourilkov, Dimitri; Cavanaugh, Richard; Rodriguez, Jorge Luis; Kategari, Suchindra; Couvares, Peter; DeSmet, Alan; Livny, Miron; Roy, Alain; Tannenbaum, Todd; Graham, Gregory E.; Aziz, Shafqat; Ernst, Michael; Kaiser, Joseph; Ratnikova, Natalia; Wenzel, Hans; Wu, Yujun; Aslakson, Erik; Bunn, Julian; Iqbal, Saima; Legrand, Iosif; Newman, Harvey; Singh, Suresh; Steenberg, Conrad; Branson, James; Fisk, Ian; Letts, James; Arbree, Adam; Avery, Paul; Bourilkov, Dimitri; Cavanaugh, Richard; Rodriguez, Jorge; Kategari, Suchindra; Couvares, Peter; Smet, Alan De; Livny, Miron; Roy, Alain; Tannenbaum, Todd

    2003-01-01

    The CMS Integration Grid Testbed (IGT) comprises USCMS Tier-1 and Tier-2 hardware at the following sites: the California Institute of Technology, Fermi National Accelerator Laboratory, the University of California at San Diego, and the University of Florida at Gainesville. The IGT runs jobs using the Globus Toolkit with a DAGMan and Condor-G front end. The virtual organization (VO) is managed using VO management scripts from the European Data Grid (EDG). Gridwide monitoring is accomplished using local tools such as Ganglia interfaced into the Globus Metadata Directory Service (MDS) and the agent based Mona Lisa. Domain specific software is packaged and installed using the Distrib ution After Release (DAR) tool of CMS, while middleware under the auspices of the Virtual Data Toolkit (VDT) is distributed using Pacman. During a continuo us two month span in Fall of 2002, over 1 million official CMS GEANT based Monte Carlo events were generated and returned to CERN for analysis while being demonstrated at SC2002. ...

  13. Deployment of the CMS software on the WLCG Grid

    CERN Document Server

    Behrenhoff, Wolf

    2011-01-01

    The CMS Experiment is taking high energy collision data at CERN. The computing infrastructure used to analyse the data is distributed round the world in a tiered structure. In order to use the 7 Tier-1 sites, the 50 Tier-2 sites and a still growing number of about 30 Tier-3 sites, the CMS software has to be available at those sites. Except for a very few sites the deployment and the removal of CMS software is managed centrally. Since the deployment team has no local accounts at the remote sites all installation jobs have to be sent via Grid jobs. Via a VOMS role the job has a high priority in the batch system and gains write privileges to the software area. Due to the lack of interactive access the installation jobs must be very robust against possible failures, in order not to leave a broken software installation. The CMS software is packaged in RPMs that are installed in the software area independent of the host OS. The apt-get tool is used to resolve package dependencies. This paper reports about the recen...

  14. Qualification of the radiation environment in the TCC2 experimental test area.

    CERN Document Server

    Fynbo, C A

    2000-01-01

    This report qualifies the radiation environment to be found in the area behind the beam dump in the TCC2 experimental hall where tests are being performed on the radiation hardness and sensitivity to Single Event Upsets of electronics to be installed near the LHC machine. A comparison is made with the radiation environment expected for the LHC, and we conclude that the environment found in the test area matches that of LHC such that tests performed here will provide a valid simulation of electronics performance under LHC running conditions.

  15. Energy balance model applied to pasture experimental areas in São Paulo State, Brazil

    Science.gov (United States)

    Bayma-Silva, Gustavo; de Castro Teixeira, Antonio Heriberto; de Castro Victoria, Daniel; Furlan Nogueira, Sandra; Freitas Leivas, Janice; Coaguila, Daniel N.; Rodrigues Herling, Valdo

    2016-10-01

    The Simple Algorithm for Evapotranspiration Retrieving (SAFER) was used to estimate biophysical parameters and the energy balance components in two different pasture experimental areas, in the São Paulo state, Brazil. The experimental pastures consist in six rotational (RGS) and three continuous grazing systems (CGS) paddocks. Landsat-8 images from 2013 and 2015 dry and rainy seasons were used, as these presented similar hydrological cycle, with 1,600 mm and 1,613 mm of annual precipitation, resulting in 19 cloud-free images. Bands 1 to 7 and thermal bands 10 and 11 were used with weather data from a station located near the experimental area. NDVI, biomass, evapotranspiration and latent heat flux (λE) temporal values statistically differ CGS from RGS areas. Grazing systems influences the energy partition and these results indicate that RGS benefits biomass production, evapotranspiration and the microclimate, due higher LE values. SAFER is a feasible tool to estimate biophysical parameters and energy balance components in pasture and has potential to discriminate continuous and rotation grazing systems in a temporal analysis.

  16. Photos from the CMS Photo Book

    CERN Multimedia

    Boreham, S

    2008-01-01

    Photos from the CMS Photo Book. Activities at Point 5 in Cessy, France, between 1998 - 2008. Images of assembly and Installation of the CMS detector: - Civil Engineering - Assembly in the Surface Building - Lowering of the Heavy Elements - Installing and connecting the CMS detector in the underground experiment These images illustrate the assembly, installation and commissioning of the CMS detector. They cover the activities at Point 5 in Cessy, France, between 1998 and 2008. CMS is one of the most complex scientific instruments ever built. It has taken about 20 years to go from conceptual design to the completion of construction of the CMS detector for the LHC start-up in September 2008. Accomplishing this has required the talents, efforts and resources of over 2500 scientists and engineers from about 180 institutions in 38 countries. caverns Compiled by: S. Cittolin, F. Marcastel and T.S. Virdee

  17. CMS Full Simulation for Run-2

    CERN Document Server

    Hildreth, M; Lange, D J; Kortelainen, M J

    2015-01-01

    During LHC shutdown between run-1 and run-2 intensive developments were carried out to improve performance of CMS simulation. For physics improvements migration from Geant4 9.4p03 to Geant4 10.0p02 has been performed. CPU performance has been improved by introduction of the Russian roulette method inside CMS calorimeters, optimization of CMS simulation sub-libraries, and usage of statics build of the simulation executable. As a result of these efforts, CMS simulation has been speeded up by about factor two. In this work we provide description of updates for different software components of CMS simulation. Development of a multi-threaded (MT) simulation approach for CMS will be also discuss.

  18. Data Logistics and the CMS Analysis Model

    CERN Document Server

    Managan, Julie E

    2009-01-01

    The Compact Muon Solenoid Experiment (CMS) at the Large Hadron Collider (LHC) at CERN has brilliant prospects for uncovering new information about the physical structure of our universe. Soon physicists around the world will participate together in analyzing CMS data in search of new physics phenomena and the Higgs Boson. However, they face a significant problem: with 5 Petabytes of data needing distribution each year, how will physicists get the data they need? How and where will they be able to analyze it? Computing resources and scientists are scattered around the world, while CMS data exists in localized chunks. The CMS computing model only allows analysis of locally stored data, “tethering” analysis to storage. The Vanderbilt CMS team is actively working to solve this problem with the Research and Education Data Depot Network (REDDnet), a program run by Vanderbilt’s Advanced Computing Center for Research and Education (ACCRE). The Compact Muon Solenoid Experiment (CMS) at the Large Hadron Collider ...

  19. Enabling opportunistic resources for CMS Computing Operations

    Energy Technology Data Exchange (ETDEWEB)

    Hufnagel, Dick [Fermilab

    2015-11-19

    With the increased pressure on computing brought by the higher energy and luminosity from the LHC in Run 2, CMS Computing Operations expects to require the ability to utilize “opportunistic” resources — resources not owned by, or a priori configured for CMS — to meet peak demands. In addition to our dedicated resources we look to add computing resources from non CMS grids, cloud resources, and national supercomputing centers. CMS uses the HTCondor/glideinWMS job submission infrastructure for all its batch processing, so such resources will need to be transparently integrated into its glideinWMS pool. Bosco and parrot wrappers are used to enable access and bring the CMS environment into these non CMS resources. Here we describe our strategy to supplement our native capabilities with opportunistic resources and our experience so far using them.

  20. Radiation simulations of the CMS detector

    Science.gov (United States)

    Stoddard, Graham J.

    This thesis presents results of recent radiation simulations for the Compact Muon Solenoid detector at the Large Hadron Collider at CERN performed using the Monte Carlo simulation package FLUKA. High statistics simulations with a fine granularity in the detector were carried out using the Condor batch system at the Fermilab LHC Physics Center. In addition, an existing web tool for accessing and displaying simulation data was upgraded. The FLUKA data and previously generated MARS Monte Carlo data can be plotted using 1-D or 2-D plotting functionalities along R and Z, the transverse distance from the beamline and the distance along the beamline, respectively. Comparisons between the data sets have been carried out; the effect of particle transport thresholds in both packages was explored, comparisons with zero magnetic field in the CMS solenoid and full field are made, a model of non-ionizing energy losses is examined, and sensitive areas of interest within the simulation are identified.

  1. Readiness of CMS Simulation Towards LHC Startup

    Energy Technology Data Exchange (ETDEWEB)

    Banerjee, Sunanda; /Fermilab

    2007-11-01

    CMS experiment has used detector simulation software in its conceptual as well as technical design. With the detector construction near its completion, the role of simulation has changed toward understanding collision data to be collected by CMS in near future. CMS simulation software is becoming a data driven, realistic and accurate Monte Carlo program. The software architecture is described with some detail of the framework as well as detector specific components. Performance issues are discussed as well.

  2. CMS Centres Worldwide - a New Collaborative Infrastructure

    CERN Document Server

    Taylor, Lucas

    2011-01-01

    Webcasts, and generic Web tools such as CMS-TV for broadcasting live monitoring and outreach information. Being Web-based and experiment-independent, these systems could easily be extended to other organizations. We describe the experiences of using CMS Centres Worldwide in the CMS data-taking operations as well as for major media events with several hundred TV channels, radio stations, and many more press journalists simultaneously around the world.

  3. 21 May 2013 - Greek Minister of Health A. Lykouretzos signing the guest book with CERN Director-General R. Heuer; visiting the LHC tunnel at POint 5 and CMS experimental cavern with Deputy Spokesperson T. Camporesi. CERN-HERMES Network Technical Coordinator E. Dimovasili; Life Sciences Adviser M. Dosanjh; National Contact Physicist, ATLAS Collaboration, NTU, Athens E. Gazis and International Relations Adviser R. Voss accompany the delegation throughout.

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    21 May 2013 - Greek Minister of Health A. Lykouretzos signing the guest book with CERN Director-General R. Heuer; visiting the LHC tunnel at POint 5 and CMS experimental cavern with Deputy Spokesperson T. Camporesi. CERN-HERMES Network Technical Coordinator E. Dimovasili; Life Sciences Adviser M. Dosanjh; National Contact Physicist, ATLAS Collaboration, NTU, Athens E. Gazis and International Relations Adviser R. Voss accompany the delegation throughout.

  4. 42 CFR 423.509 - Termination of contract by CMS.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Termination of contract by CMS. 423.509 Section 423... Contracts with Part D plan sponsors § 423.509 Termination of contract by CMS. (a) Termination by CMS. CMS may at any time terminate a contract if CMS determines that the Part D plan sponsor meets any of...

  5. 42 CFR 422.510 - Termination of contract by CMS.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Termination of contract by CMS. 422.510 Section 422... Advantage Organizations § 422.510 Termination of contract by CMS. (a) Termination by CMS. CMS may at any time terminate a contract if CMS determines that the MA organization meets any of the following:...

  6. Status and Commissioning of the CMS Experiment

    CERN Document Server

    Buchmüller, O L

    2007-01-01

    After a brief overview of the Compact Muon Solenoid (CMS) experiment, the status of construction and installation is described in the first part of the note. The second part of the document is devoted to a discussion of the general commissioning strategy of the CMS experiment, with a particular emphasis on trigger, calibration and alignment. Aspects of b-physics, as well as examples for early physics with CMS are also presented. CMS will be ready for data taking in time for the first collisions in the Large Hadron Collider (LHC) at CERN in late 2007.

  7. CMS data and workflow management system

    CERN Document Server

    Fanfani, A; Bacchi, W; Codispoti, G; De Filippis, N; Pompili, A; My, S; Abbrescia, M; Maggi, G; Donvito, G; Silvestris, L; Calzolari, F; Sarkar, S; Spiga, D; Cinquili, M; Lacaprara, S; Biasotto, M; Farina, F; Merlo, M; Belforte, S; Kavka, C; Sala, L; Harvey, J; Hufnagel, D; Fanzago, F; Corvo, M; Magini, N; Rehn, J; Toteva, Z; Feichtinger, D; Tuura, L; Eulisse, G; Bockelman, B; Lundstedt, C; Egeland, R; Evans, D; Mason, D; Gutsche, O; Sexton-Kennedy, L; Dagenhart, D W; Afaq, A; Guo, Y; Kosyakov, S; Lueking, L; Sekhri, V; Fisk, I; McBride, P; Bauerdick, L; Bakken, J; Rossman, P; Wicklund, E; Wu, Y; Jones, C; Kuznetsov, V; Riley, D; Dolgert, A; van Lingen, F; Narsky, I; Paus, C; Klute, M; Gomez-Ceballos, G; Piedra-Gomez, J; Miller, M; Mohapatra, A; Lazaridis, C; Bradley, D; Elmer, P; Wildish, T; Wuerthwein, F; Letts, J; Bourilkov, D; Kim, B; Smith, P; Hernandez, J M; Caballero, J; Delgado, A; Flix, J; Cabrillo-Bartolome, I; Kasemann, M; Flossdorf, A; Stadie, H; Kreuzer, P; Khomitch, A; Hof, C; Zeidler, C; Kalini, S; Trunov, A; Saout, C; Felzmann, U; Metson, S; Newbold, D; Geddes, N; Brew, C; Jackson, J; Wakefield, S; De Weirdt, S; Adler, V; Maes, J; Van Mulders, P; Villella, I; Hammad, G; Pukhaeva, N; Kurca, T; Semneniouk, I; Guan, W; Lajas, J A; Teodoro, D; Gregores, E; Baquero, M; Shehzad, A; Kadastik, M; Kodolova, O; Chao, Y; Ming Kuo, C; Filippidis, C; Walzel, G; Han, D; Kalinowski, A; Giro de Almeida, N M; Panyam, N

    CMS expects to manage many tens of peta bytes of data to be distributed over several computing centers around the world. The CMS distributed computing and analysis model is designed to serve, process and archive the large number of events that will be generated when the CMS detector starts taking data. The underlying concepts and the overall architecture of the CMS data and workflow management system will be presented. In addition the experience in using the system for MC production, initial detector commissioning activities and data analysis will be summarized.

  8. Higgs and New Physics at ATLAS and CMS

    CERN Document Server

    Giagu, Stefano; The ATLAS collaboration

    2017-01-01

    Results of the search for new physics effects in proton-proton collision data at s = 13 TeV collected by the ATLAS and CMS detectors at the Large Hadron Collider are presented. Standard Model Higgs boson measurements in different production and decay channels, as well as direct Beyond-Standard-Model searches in several experimental signatures, based on data taken during the 2015 and part of 2016 runs are summarised.

  9. Jets and high p{sub T} hadrons in CMS

    Energy Technology Data Exchange (ETDEWEB)

    Mao, Yaxian

    2014-06-15

    We present the recent experimental results on jets and high p{sub T} hadrons measured by the CMS Collaboration using various observables: jet and high p{sub T} charged hadron yields, dijet imbalance, jet shapes and fragmentation functions. The measurements of dijet p{sub T} and pseudorapidity distributions in pPb collisions using the data delivered by LHC at early 2013 are also presented.

  10. Centrality determination in pPb collisions with CMS

    Energy Technology Data Exchange (ETDEWEB)

    Tuo, Shengquan

    2014-06-15

    Centrality is very important for defining the collision system size in heavy ion collisions. It provides a tool for selecting events according to cross section in a similar way in different experiments and facilitates the comparison of experimental results and theoretical calculations. The progress of centrality determination in pPb collisions at CMS is presented. The choice of variables used for event classification will be discussed. Methods for the estimation of the number of nucleon–nucleon collisions will be shown.

  11. First Run 2 Searches for Exotica at CMS

    CERN Document Server

    Başeğmez du Pree, S

    2016-01-01

    An overview of the first results of the experimental searches for exotica at the CMS experiment with 13 TeV collision data is presented. The results cover various models with different topologies such as searches for new heavy resonances, extra space dimensions, black holes and dark matter. The analysis results with 13 TeV data are emphasized, corresponding to an integrated luminosity in the range of 2.1–2.8 fb

  12. Analiz ehffektivnosti perednej radiatsionnoj zashchity detektora CMS na LHC

    CERN Document Server

    Azhgirey, L S

    2002-01-01

    On the basis of numerical simulation results one analyzed the efficiency of the front radiation protection multipurpose CMS (Compact Muon Solenoid) detector on LHC. Paper presents the results of calculations of particle flow densities and of comparison with the protection perfect model. One investigated into secondary radiation field within detector range depending on configuration of protection. One proposes measures to improve protection of detector experimental region. Further ways to optimize design and composition of materials of protection are discussed

  13. Low-x QCD with CMS at the LHC

    CERN Document Server

    d'Enterria, David G.

    2007-01-01

    The physics of gluon saturation and non-linear evolution at small values of parton momentum fraction $x$ in the proton and nucleus is briefly discussed in the context of experimental results at HERA and RHIC. The rich physics potential of low-x QCD studies at the LHC is presented and some measurements in pp, pA and AA collisions accessible with the Compact Muon Solenoid (CMS) experiment are discussed.

  14. Experimental Study of Coal and Gas Outbursts Related to Gas-Enriched Areas

    Science.gov (United States)

    Tu, Qingyi; Cheng, Yuanping; Guo, Pinkun; Jiang, Jingyu; Wang, Liang; Zhang, Rong

    2016-09-01

    A coal and gas outburst can lead to a catastrophic failure in a coal mine. These outbursts usually occur where the distribution of coal seam gas is abnormal, commonly in tectonic belts. To study the effects of the abnormal distribution of this gas on outbursts, an experimental apparatus to collect data on simulated coal seam outbursts was constructed. Experiments on specimens containing discrete gas-enriched areas were run to induce artificial gas outbursts and further study of these outbursts using data from the experiment was conducted. The results suggest that more gas and outburst energy are contained in gas-enriched areas and this permits these areas to cause an outburst easily, even though the gas pressure in them is lower. During mining, the disappearance of the sealing effect of a coal pillar establishes the occurrence conditions for an outburst. When the enriched gas and outburst energy in the gas-enriched area is released suddenly, a reverse unloading wave and a high gas pressure gradient are formed, which have tension effects on the coal. Under these effects, the fragmentation degree of the coal intensifies and the intensity of the outburst increases. Because a high gas pressure gradient is maintained near the exposed surface and the enriched energy release reduces the coal strength, the existence of a gas-enriched area in coal leads to a faster outburst and the average thickness of the spall is smaller than where is no gas-enriched area.

  15. New CMS management: catching the Higgs (or non-Higgs)

    CERN Multimedia

    Antonella del Rosso

    2012-01-01

    CMS, one of the two gigantic international collaborations running experiments at the LHC, has recently appointed its new management. The new spokesperson and his two deputies are well aware of the pressure associated with holding such high positions during such a historic time for particle physics. Although their focus is on the Higgs, they anticipate that other areas of CMS’ multi-purpose research programme might become equally as intriguing this year.   With around 4,300 active members representing every continent and the task of uncovering some of the deepest mysteries of the Universe, CMS is constantly under the spotlight. The pressure is on to ensure the high performance of the detector while providing solutions for extremely accurate but quick data analysis. “The LHC machine is setting the pace for CMS,” explains Joseph Incandela from UC Santa Barbara/CERN, the new CMS spokesperson. “The 2012 run will most probably go to a higher energy and inten...

  16. Design, Implementation and First Measurements with the Medipix Neutron Camera in CMS

    OpenAIRE

    Pfeiffer, Dorothea; Ball, Austin; Bell, Alan; Butler, Anthony; Butler, Philip; Hall-Wilton, Richard; Hegeman, Jeroen; Lansley, Stuart; Keen, Gary; Krofcheck, David; Mueller, Steffen; Macpherson, Alick; Pospisil, Stanislav; Silverwood, Hamish; Tsesmelis, Emmanuel

    2011-01-01

    The Medipix detector is the first device dedicated to measuring mixed-field radiation in the CMS cavern and able to distinguish between different particle types. Medipix2-MXR chips bump bonded to silicon sensors with various neutron conversion layers developed by the IEAP CTU in Prague were successfully installed for the 2008 LHC start-up in the CMS experimental and services caverns to measure the flux of various particle types, in particular neutrons. They have operated almost continuously d...

  17. The CMS workload management system

    Science.gov (United States)

    Cinquilli, M.; Evans, D.; Foulkes, S.; Hufnagel, D.; Mascheroni, M.; Norman, M.; Maxa, Z.; Melo, A.; Metson, S.; Riahi, H.; Ryu, S.; Spiga, D.; Vaandering, E.; Wakefield, S.; Wilkinson, R.

    2012-12-01

    CMS has started the process of rolling out a new workload management system. This system is currently used for reprocessing and Monte Carlo production with tests under way using it for user analysis. It was decided to combine, as much as possible, the production/processing, analysis and T0 codebases so as to reduce duplicated functionality and make best use of limited developer and testing resources. This system now includes central request submission and management (Request Manager); a task queue for parcelling up and distributing work (WorkQueue) and agents which process requests by interfacing with disparate batch and storage resources (WMAgent).

  18. CMS magnet Conference MT17

    CERN Multimedia

    2001-01-01

    The CMS magnet system consists of the superconducting coil, the magnet yoke (barrel and endcap), the vacuum tank and ancillaries such as cryogenics and power supply. The axial magnetic field is 4 Tesla, the yoke diameter is 14 m across flats, the axial yoke length including endcaps is 21.6 m and the total mass is about 12000 tons. It will be the largest superconducting magnet in the world in term of energy stored into it: 2.7 GJ (large enough to melt 18 tonnes of gold).

  19. CMS Object—Oriented Analysis

    Institute of Scientific and Technical Information of China (English)

    V.Innocente; E.Meschi; 等

    2001-01-01

    The CMS OO reconstruction program-ORCA-has been used since 1999 to produce large samples of reconstructed Monte-Carlo events for detector optimization,trigger and physics studies,The events are stored in several Objectivity federations at CERN,in the US,Italy and other countries.To perform their studies physicists use different event samples ranging from complete datasets of TByte size to only a few events out of these datasets.We describe the implementation of these requirements in the ORCA software and the way collctions of events are accessed for reading,writing or copying.

  20. Heavy flavour production at CMS

    CERN Document Server

    Negro, Giulia

    2016-01-01

    Three recent results in heavy flavour production at the CMS experiment are addressed in this report. Measurements of the differential production cross sections of B hadron and quarkonium states in pp collisions at $\\sqrt{s} = 13$ TeV are presented. These are important tools to investigate heavy-quark production mechanisms in QCD. The dependences on transverse momentum and rapidity are investigated and comparisons with theory expectations and among different collision energies are provided. Also the new observation of $\\Upsilon(1S)\\Upsilon(1S)$ production is reported.

  1. V+jets from CMS

    CERN Document Server

    Hortiangtham, Apichart

    2016-01-01

    The production of vector bosons (V = W, Z or $\\gamma$) in association with jets is a stringent test of perturbative QCD and is a background process in searches for new physics. Total and differential cross-section measurements of vector bosons produced in association with jets (and heavy flavour quarks) are presented. The data have been recorded with the CMS detector at the LHC and are compared to next-to leading order calculations and event simulations that devise matrix element calculations interfaced with parton showers.

  2. B hadron properties at CMS

    CERN Document Server

    Heredia De La Cruz, Ivan

    2016-01-01

    Precise measurements of B hadron properties are crucial to improve or constrain models based on non-perturbative quantum chromodynamics, which provide predictions of mass, lifetime, cross section, polarization, and branching ratios (among several other properties) of B hadrons. Measurements of CP violation in $B^0_s$ and properties of rare B decays also provide many opportunities to search for new physics. This article presents some B hadron property results obtained by CMS using Run~I (2011-2012) data, and prospects for the Run~II (2015-2017) data taking period.

  3. Dark matter search in CMS

    CERN Document Server

    Vartak, Adish

    2017-01-01

    The dark matter search program at the LHC covers a wide range of final states and targets a variety of possible interactions between dark matter and standard model particles. A summary of the dark matter searches performed at the CMS experiment, using proton-proton collision data collected at a center of energy of 13 TeV, is presented.Searches performed in various final states are described, and results interpreted in terms of several dark matter models are presented. These results are also compared to the results from direct and indirect dark matter searches.

  4. Electroweak precision measurements in CMS

    CERN Document Server

    Dordevic, Milos

    2017-01-01

    An overview of recent results on electroweak precision measurements from the CMS Collaboration is presented. Studies of the weak boson differential transverse momentum spectra, Z boson angular coefficients, forward-backward asymmetry of Drell-Yan lepton pairs and charge asymmetry of W boson production are made in comparison to the state-of-the-art Monte Carlo generators and theoretical predictions. The results show a good agreement with the Standard Model. As a proof of principle for future W mass measurements, a W-like analysis of the Z boson mass is performed.

  5. CMS Barrel Pixel Detector Overview

    CERN Document Server

    Kästli, H C; Erdmann, W; Gabathuler, K; Hörmann, C; Horisberger, Roland Paul; König, S; Kotlinski, D; Meier, B; Robmann, P; Rohe, T; Streuli, S

    2007-01-01

    The pixel detector is the innermost tracking device of the CMS experiment at the LHC. It is built from two independent sub devices, the pixel barrel and the end disks. The barrel consists of three concentric layers around the beam pipe with mean radii of 4.4, 7.3 and 10.2 cm. There are two end disks on each side of the interaction point at 34.5 cm and 46.5 cm. This article gives an overview of the pixel barrel detector, its mechanical support structure, electronics components, services and its expected performance.

  6. The CMS High Level Trigger

    CERN Document Server

    Adam, W; Deldicque, C; Ero, J; Frühwirth, R; Jeitler, Manfred; Kastner, K; Köstner, S; Neumeister, N; Porth, M; Padrta P; Rohringer, H; Sakulinb, H; Strauss, J; Taurok, A; Walzel, G; Wulz, C E; Lowette, S; Van De Vyver, B; De Lentdecker, G; Vanlaer, P; Delaere, C; Lemaître, V; Ninane, A; van der Aa, O; Damgov, J; Karimäki, V; Kinnunen, R; Lampen, T; Lassila-Perini, K M; Lehti, S; Nysten, J; Tuominiemi, J; Busson, P; Todorov, T; Schwering, G; Gras, P; Daskalakis, G; Sfyrla, A; Barone, M; Geralis, T; Markou, C; Zachariadou, K; Hidas, P; Banerjee, S; Mazumdara, K; Abbrescia, M; Colaleoa, A; D'Amato, N; De Filippis, N; Giordano, D; Loddo, F; Maggi, M; Silvestris, L; Zito, G; Arcelli, S; Bonacorsi, D; Capiluppi, P; Dallavalle, G M; Fanfani, A; Grandi, C; Marcellini, S; Montanari, A; Odorici, F; Travaglini, R; Costa, S; Tricomi, A; Ciulli, a V; Magini, N; Ranieri, R; Berti, L; Biasotto, M; Gulminia, M; Maron, G; Toniolo, N; Zangrando, L; Bellato, M; Gasparini, U; Lacaprara, S; Parenti, A; Ronchese, P; Vanini, S; Zotto, S; Ventura P L; Perugia; Benedetti, D; Biasini, M; Fano, L; Servoli, L; Bagliesi, a G; Boccali, T; Dutta, S; Gennai, S; Giassi, A; Palla, F; Segneri, G; Starodumov, A; Tenchini, R; Meridiani, P; Organtini, G; Amapane, a N; Bertolino, F; Cirio, R; Kim, J Y; Lim, I T; Pac, Y; Joo, K; Kim, S B; Suwon; Choi, Y I; Yu, I T; Cho, K; Chung, J; Ham, S W; Kim, D H; Kim, G N; Kim, W; CKim, J; Oh, S K; Park, H; Ro, S R; Son, D C; Suh, J S; Aftab, Z; Hoorani, H; Osmana, A; Bunkowski, K; Cwiok, M; Dominik, Wojciech; Doroba, K; Kazana, M; Królikowski, J; Kudla, I; Pietrusinski, M; Pozniak, Krzysztof T; Zabolotny, W M; Zalipska, J; Zych, P; Goscilo, L; Górski, M; Wrochna, G; Zalewski, P; Alemany-Fernandez, R; Almeida, C; Almeida, N; Da Silva, J C; Santos, M; Teixeira, I; Teixeira, J P; Varelaa, J; Vaz-Cardoso, N; Konoplyanikov, V F; Urkinbaev, A R; Toropin, A; Gavrilov, V; Kolosov, V; Krokhotin, A; Oulianov, A; Stepanov, N; Kodolova, O L; Vardanyan, I; Ilic, J; Skoro, G P; Albajar, C; De Troconiz, J F; Calderón, A; López-Virto, M A; Marco, R; Martínez-Rivero, C; Matorras, F; Vila, I; Cucciarelli, S; Konecki, M; Ashby, S; Barney, D; Bartalini, P; Benetta, R; Brigljevic, V; Bruno, G; Cano, E; Cittolin, S; Della Negra, M; de Roeck, A; Favre, P; Frey, A; Funk, W; Futyan, D; Gigi, D; Glege, F; Gutleber, J; Hansen, M; Innocente, V; Jacobs, C; Jank, W; Kozlovszky, Miklos; Larsen, H; Lenzi, M; Magrans, I; Mannelli, M; Meijers, F; Meschi, E; Mirabito, L; Murray, S J; Oh, A; Orsini, L; Palomares-Espiga, C; Pollet, L; Rácz, A; Reynaud, S; Samyn, D; Scharff-Hansen, P; Schwick, C; Sguazzoni, G; Sinanis, N; Sphicas, P; Spiropulu, M; Strandlie, A; Taylor, B G; Van Vulpen, I; Wellisch, J P; Winkler, M; Villigen; Kotlinski, D; Zurich; Prokofiev, K; Speer, T; Dumanoglu, I; Bristol; Bailey, S; Brooke, J J; Cussans, D; Heath, G P; Machin, D; Nash, S J; Newbold, D; Didcot; Coughlan, A; Halsall, R; Haynes, W J; Tomalin, I R; Marinelli, N; Nikitenko, A; Rutherford, S; Seeza, C; Sharif, O; Antchev, G; Hazen, E; Rohlf, J; Wu, S; Breedon, R; Cox, P T; Murray, P; Tripathi, M; Cousins, R; Erhan, S; Hauser, J; Kreuzer, P; Lindgren, M; Mumford, J; Schlein, P E; Shi, Y; Tannenbaum, B; Valuev, V; Von der Mey, M; Andreevaa, I; Clare, R; Villa, S; Bhattacharya, S; Branson, J G; Fisk, I; Letts, J; Mojaver, M; Paar, H P; Trepagnier, E; Litvine, V; Shevchenko, S; Singh, S; Wilkinson, R; Aziz, S; Bowden, M; Elias, J E; Graham, G; Green, D; Litmaath, M; Los, S; O'Dell, V; Ratnikova, N; Suzuki, I; Wenzel, H; Acosta, D; Bourilkov, D; Korytov, A; Madorsky, A; Mitselmakher, G; Rodríguez, J L; Scurlock, B; Abdullin, S; Baden, D; Eno, S; Grassi, T; Kunori, S; Pavlon, S; Sumorok, K; Tether, S; Cremaldi, L M; Sanders, D; Summers, D; Osborne, I; Taylor, L; Tuura, L; Fisher,W C; Mans6, J; Stickland, D P; Tully, C; Wildish, T; Wynhoff, S; Padley, B P; Chumney, P; Dasu, S; Smith, W H; CMS Trigger Data Acquisition Group

    2006-01-01

    At the Large Hadron Collider at CERN the proton bunches cross at a rate of 40MHz. At the Compact Muon Solenoid experiment the original collision rate is reduced by a factor of O (1000) using a Level-1 hardware trigger. A subsequent factor of O(1000) data reduction is obtained by a software-implemented High Level Trigger (HLT) selection that is executed on a multi-processor farm. In this review we present in detail prototype CMS HLT physics selection algorithms, expected trigger rates and trigger performance in terms of both physics efficiency and timing.

  7. An experimental and numerical investigation of velocity in an enclosed residential complex parking area

    Science.gov (United States)

    Ashrafi, Khosro; Motlagh, Majid Shafie Pour; Mousavi, Monireh Sadat; Niksokhan, Mohhamad hosein; Vosoughifar, Hamid Reza

    2017-02-01

    The aim of the present research is analysis of velocity vector and magnitude in an enclosed residential complex parking in Tehran. Velocity parameters are key factor and can be helpful in proposing solutions to improve indoor air quality. Since The flow pattern determines that how and where the pollutants propagate. In this research at first, the proportion of vehicular exhaust emissions is estimated and then experimental and numerical analyses are performed. In experimental analysis, a full-scale experiment of parking area has been used; velocity is measured by calibrated measuring devices. Samples were performed in several times. In order to perform numerical calculation, a 3-dimensional model was created by Fluent software that solves flow equations with finite volume method. In this research, the flow condition is assumed to be incompressible and turbulent. Standard k-ɛ scheme was selected as turbulence modeling. In the Computational Fluid Dynamics technique the geometry of parking area is generated in ICEM-CFD software and hexahedral mesh type is used. Velocity vectors and magnitudes in an enclosed residential complex parking in Tehran are estimated. The findings obtained from numerical simulation are in complete accord with experimental results.

  8. Evaluation of the radiation field and shielding assessment of the experimental area of HIE-ISOLDE.

    Science.gov (United States)

    Romanets, Y; Bernardes, A P; Dorsival, A; Gonçalves, I F; Kadi, Y; di Maria, S; Vaz, P; Vlachoudis, V; Vollaire, J

    2014-10-01

    The ISOLDE facility at CERN is one of the first facilities in the world dedicated to the production of the radioactive ion beams (RIB) and during all its working time underwent several upgrades. The goal of the latest proposed upgrade, 'The High Intensity and Energy ISOLDE' (HIE-ISOLDE), is to provide a higher performance facility in order to approximate it to the level of the next generation ISOL facilities, like EURISOL. The HIE-ISOLDE aims to improve significantly the quality of the produced RIB and for this reason the increasing of the primary beam power is one of the main objectives of the project. An increase in the nominal beam current (from 2 to 6 μA proton beam intensity) and energy (from 1.4 GeV to 2 GeV) of the primary proton beam will be possible due to the upgrade of CERN's accelerator infrastructure. The current upgrade means reassessment of the radiation protection and the radiation safety of the facility. However, an evaluation of the existing shielding configuration and access restrictions to the experimental and supply areas must be carried out. Monte Carlo calculations were performed in order to evaluate the radiation protection of the facility as well as radiation shielding assessment and design. The FLUKA-Monte Carlo code was used in this study to calculate the ambient dose rate distribution and particle fluxes in the most important areas, such as the experimental hall of the facility. The results indicate a significant increase in the ambient dose equivalent rate in some areas of the experimental hall when an upgrade configuration of the primary proton beam is considered. Special attention is required for the shielding of the target area once it is the main and very intensive radiation source, especially under the upgrade conditions. In this study, the access points to the beam extraction and beam maintenance areas, such as the mass separator rooms and the high voltage room, are identified as the most sensitive for the experimental hall from

  9. 7 CFR 301.75-9 - Interstate movement of regulated articles from a quarantined area for experimental or scientific...

    Science.gov (United States)

    2010-01-01

    ... Interstate movement of regulated articles from a quarantined area for experimental or scientific purposes. A... 7 Agriculture 5 2010-01-01 2010-01-01 false Interstate movement of regulated articles from a quarantined area for experimental or scientific purposes. 301.75-9 Section 301.75-9 Agriculture Regulations...

  10. Design and construction of an experimental pervious paved parking area to harvest reusable rainwater.

    Science.gov (United States)

    Gomez-Ullate, E; Novo, A V; Bayon, J R; Hernandez, Jorge R; Castro-Fresno, Daniel

    2011-01-01

    Pervious pavements are sustainable urban drainage systems already known as rainwater infiltration techniques which reduce runoff formation and diffuse pollution in cities. The present research is focused on the design and construction of an experimental parking area, composed of 45 pervious pavement parking bays. Every pervious pavement was experimentally designed to store rainwater and measure the levels of the stored water and its quality over time. Six different pervious surfaces are combined with four different geotextiles in order to test which materials respond better to the good quality of rainwater storage over time and under the specific weather conditions of the north of Spain. The aim of this research was to obtain a good performance of pervious pavements that offered simultaneously a positive urban service and helped to harvest rainwater with a good quality to be used for non potable demands.

  11. US CMS Tier-2 computing

    Energy Technology Data Exchange (ETDEWEB)

    Bloom, K [Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincon, NE 68588-0111 (United States)], E-mail: kenbloom@unl.edu

    2008-07-15

    The CMS computing model relies heavily on the use of 'Tier-2' computing centers. At LHC startup, the typical Tier-2 center in the United States will have 1 MSpecInt2K of CPU resources, 200 TB of disk for data storage, and a WAN connection of 10 Gbit/s. These centers will be the primary sites for the production of large-scale simulation samples and for the hosting of experiment data for user analysis ? an interesting mix of experiment-controlled and user-controlled tasks. As a result, there are a wide range of services that must be deployed and commissioned at these centers, which are responsible for tasks such as dataset transfer, management of datasets, hosting of jobs submitted through Grid interfaces, and several varieties of monitoring. We discuss the development of the seven CMS Tier-2 computing centers in the United States, with a focus on recent operational performance and preparations for the start of data-taking in 2008.

  12. VNR CMS Pixel detector replacement

    CERN Document Server

    2017-01-01

    Joel Butler, spokesperson of the CMS collaboration explains how a team from many different partner institutes installed a new detector in CMS. This detector is the silicon pixel detector and they’ve been working on it for about five years, to replace one of our existing detectors. This detectors measures particles closer to the beam than any of the other components of this huge detector behind me. It gives us the most precise picture of tracks as they come out of the collisions and expand and travel through the detector. This particular device has twice as many pixels, 120 million, as opposed to about 68 million in the old detector and it can take data faster and pump it out to the analysis more quickly. 00’53’’ Images of the descent, insertion and installation of first piece of the Pixel detector on Tue Feb 28. Images of the descent, insertion and installation of second piece of the Pixel and the two cylinders being joined.

  13. CMS: Beyond all possible expectations

    CERN Multimedia

    CERN Bulletin

    2010-01-01

    After having retraced the entire Standard Model up to the Top, the CMS collaboration is ready to go further and continue the success of what Guido Tonelli – its spokesperson – defines as a ‘magic year’. Things evolve fast at CMS, but scientists have taken up the challenge and are ready for the future.   ‘Enthusiasm’ is the word that best describes the feeling one gets when talking to Guido Tonelli. “In just a few months we have rediscovered the Standard Model and have gone even further by producing new results for cross-sections, placing new limits on the creation of heavy masses, making studies on the excited states of quarks, and seeking new resonances. We could not have expected so much such a short space of time. It’s fantastic”, he says. “We went through the learning phase very smoothly. Our detector was very quickly ready to do real physics and we were able to start to produce results almost ...

  14. Highlights from the CMS Experiment

    CERN Document Server

    Alcaraz Maestre, Juan

    2017-01-01

    We discuss the status and some recent results of the CMS experiment at the LHC. The performance of the detector is assessed using a luminosity of $\\approx 5~\\mathrm{fb}^{-1}$ recorded in the first part of the 2017 data-taking period. Run~2 physics studies use data collected at a center-of-mass energy of $\\sqrt{s}=13~\\mathrm{TeV}$, corresponding to an integrated luminosity of $36~\\mathrm{fb}^{-1}$. Highlights from studies in the Higgs sector are the first observation of its decay into tau leptons by a single experiment, the most precise measurement of its mass, $\\mathrm{m_H} = 125.26 \\pm 0.21~\\mathrm{GeV}$ and a first search for the $\\mathrm{H}\\to\\mathrm{b\\overline{b}}$ decay in a phase space region that is sensitive to the gluon-fusion production mechanism. In the electroweak sector, CMS provides the currently most precise measurement of the effective weak mixing angle at the LHC: $\\sin\\theta^{\\rm lept}_{\\rm eff} = 0.23101\\pm 0.00052$, using an integrated luminosity of $\\approx 20~\\mathrm{fb}^{-1}$ at $\\sqr...

  15. Cacao roasting in rural areas of Peru using concentrated solar thermal energy: experimental results

    Directory of Open Access Journals (Sweden)

    Veynandt François

    2016-01-01

    Full Text Available Solar food processing is gaining interest for income generation. Our solar cacao roaster, designed for rural areas, consists in a horizontal rotating drum, opened at one end to collect solar radiation from Scheffler concentrators of 2.7 or 8 m2. The experimental results presented bring knowledge on the system's behavior and optimal operation. The influence of the most significant parameters is studied: quantity of cacao, absorptivity of drum's coating, thermal insulation, inclination and rotational speed of the drum. Cacao temperature and direct solar irradiance are monitored to evaluate the performance in roasting time per kilogram of cacao.

  16. Optimized Annular Triode Ion Pump for Experimental Areas in the LHC

    CERN Document Server

    Knaster, J R; Chatelaine, A; Flakowski, D; Girard, C; Ivaldi, S; Laurent, Jean Michel; Monteiro, I; Rossi, A; Veness, R J M

    2003-01-01

    The LHC will be the world next generation accelerator to be operational in 2007 at CERN. The UHV requirements force the installation of ion pumps in the experimental areas of ATLAS. Due to the unacceptable particle background that standards ion pumps may generate, a reduction in the amount of material constitutive of the pump body is required. Hence, an stainless steel 0.8 mm thick body annular triode ion pump has been designed. A pumping speed of ~ 20 l/s at 10-9 mbar is provided by 15 pumping elements. Finite elements analysis and destructive tests have been performed in its design. Final vacuum tests results are shown.

  17. Cacao roasting in rural areas of Peru using concentrated solar thermal energy: experimental results

    Directory of Open Access Journals (Sweden)

    Veynandt François

    2016-01-01

    Full Text Available Solar food processing is gaining interest for income generation. Our solar cacao roaster, designed for rural areas, consists in a horizontal rotating drum, opened at one end to collect solar radiation from Scheffler concentrators of 2.7 or 8 m2. The experimental results presented bring knowledge on the system's behavior and optimal operation. The influence of the most significant parameters is studied: quantity of cacao, absorptivity of drum's coating, thermal insulation, inclination and rotational speed of the drum. Cacao temperature and direct solar irradiance are monitored to evaluate the performance in roasting time per kilogram of cacao.

  18. Results from combined CMS-TOTEM data

    CERN Document Server

    Sen, Sercan

    2016-01-01

    The combined data taking of the CMS and TOTEM experiments allows to characterize hadronic final states in an extremely wide pseudo-rapidity range and opens up a window to a rich diffractive/forward physics program. In this paper, the trigger strategy of the common data taking is described, and the physics results from combined CMS-TOTEM data is presented.

  19. Set of CMS posters in Spanish

    CERN Multimedia

    Lapka, Marzena; Rao, Achintya

    2014-01-01

    14 A0 posters in English to be printed locally or displayed online. Purpose: science fairs, exhibitions, preparatory material for the CMS virtual visits, etc. Themes: CMS detector, sub-detectors, construction, lowering and installation, collaboration and physics. Available in many languages.

  20. Set of CMS posters in Greek

    CERN Multimedia

    Lapka, Marzena; Petrilli, Achille

    2015-01-01

    14 A0 posters in English to be printed locally or displayed online. Purpose: science fairs, exhibitions, preparatory material for the CMS virtual visits, etc. Themes: CMS detector, sub-detectors, construction, lowering and installation, collaboration and physics. Available in many languages.

  1. Set of CMS posters in English

    CERN Multimedia

    Lapka, Marzena; Rao, Achintya

    2014-01-01

    14 A0 posters in English to be printed locally or displayed online. Purpose: science fairs, exhibitions, preparatory material for the CMS virtual visits, etc. Themes: CMS detector, sub-detectors, construction, lowering and installation, collaboration and physics. Available in many languages.

  2. Jim Virdee, the new spokesperson of CMS

    CERN Multimedia

    2006-01-01

    Jim Virdee and Michel Della Negra. On 21 June Tejinder 'Jim'Virdee was elected by the CMS collaboration as its new spokesperson, his 3-year term of office beginning in January 2007. He will take over from Michel Della Negra, who has been CMS spokesperson since its formalization in 1992. Three distinguished physicists stood as candidates for this election: Dan Green from Fermilab, programme manager of the US-CMS collaboration and coordinator of the CMS Hadron Calorimeter project; Jim Virdee from Imperial College London and CERN, deputy spokesperson of CMS since 1993; Gigi Rolandi from the University of Trieste and CERN, ex-Aleph spokesperson and currently involved in the preparations of the physics analyses to be done with CMS. On the early evening of 21 June, 141 of the 142 members of the CMS collaboration board, some represented by proxies, took part in a secret ballot. After two rounds of voting Jim Virdee was elected as spokesperson with a clear majority. Jim thanked the CMS collaboration 'for putting conf...

  3. General Alignment Concept of the CMS experiment

    CERN Document Server

    Lampen, T

    2006-01-01

    Efficient and accurate track reconstruction requires proper alignment of the tracking devices used. Here we describe the general alignment strategy envisaged for the CMS experiment. The hardware alignment devices of CMS are presented as well as the different track based alignment approaches.

  4. Iron Blocks of CMS Magnet Barrel Yoke.

    CERN Multimedia

    2000-01-01

    On the occasion of presenting the CMS Award 2000 to Deggendorfer Werft und Eisenbau GmbH the delivered blocks were inspected at CERN Point 5. From left to right: H. Gerwig (CERN, CMS Magnet Barrel Yoke Coordinator), G. Waurick (CERN), F. Leher (DWE, Project Engineer) and W. Schuster (DWE, Project Manager).

  5. The status of the CMS experiment

    Energy Technology Data Exchange (ETDEWEB)

    Green, Dan; /Fermilab

    2009-01-01

    The CMS experiment was completely assembled in the fall of 2008 after a decade of design, construction and installation. During the last two years, cosmic ray data were taken on a regular basis. These data have enabled CMS to align the detector components, both spatially and temporally. Initial use of muons has also established the relative alignment of the CMS tracking and muon systems. In addition, the CMS calorimetry has been crosschecked with test beam data, thus providing an initial energy calibration of CMS calorimetry to about 5%. The CMS magnet has been powered and field mapped. The trigger and data acquisition systems have been installed and run at full speed. The tiered data analysis system has been exercised at full design bandwidth for Tier0, Tier1 and Tier2 sites. Monte Carlo simulation of the CMS detector has been constructed at a detailed geometric level and has been tuned to test beam and other production data to provide a realistic model of the CMS detector prior to first collisions.

  6. The status of the CMS experiment

    CERN Document Server

    Green, D

    2009-01-01

    The CMS experiment was completely assembled in the fall of 2008 after a decade of design, construction and commissioning. During the last two years cosmic ray data were taken on a regular basis. These data have enabled CMS to align the detector components, both spatially and temporally. Initial alignment using muons has established the relative alignment of the CMS tracking and muon systems. In addition, the CMS calorimetry has been crosschecked with test beam data thus providing an initial energy calibration of CMS calorimetry to about 5 per cent. The CMS magnet has been powered and field mapped. The trigger and data acquisition systems have been installed and run at full speed. The tiered data analysis system has been exercised at full design bandwidth for Tier0, Tier1 and Tier2 sites. Monte Carlo simulation of the CMS detector has been constructed at a detailed geometric level and has been tuned to test beam and other production data to provide a realistic model of the CMS detector.

  7. Final Technical Report CMS fast optical calorimetry

    Energy Technology Data Exchange (ETDEWEB)

    Winn, David R. [Fairfield Univ., CT (United States)

    2012-07-12

    This is the final report of CMS FAST OPTICAL CALORIMETRY, a grant to Fairfield University for development, construction, installation and operation of the forward calorimeter on CMS, and for upgrades of the forward and endcap calorimeters for higher luminosity and radiation damage amelioration.

  8. CMS installations are put to the test

    CERN Multimedia

    2006-01-01

    CMS has just undergone two important tests: a spectacular test of the fire extinguishing system in the underground cavern (photo) and, on the surface, a strength test on the plug over the main shaft, which will bear the weight of the detector components when they are lowered into the CMS hall.

  9. 23 CFR 500.109 - CMS.

    Science.gov (United States)

    2010-04-01

    ... 23 Highways 1 2010-04-01 2010-04-01 false CMS. 500.109 Section 500.109 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION TRANSPORTATION INFRASTRUCTURE MANAGEMENT MANAGEMENT AND MONITORING SYSTEMS Management Systems § 500.109 CMS. (a) For purposes of this part, congestion means the level...

  10. Experimental and analytical study of interfacial area transport phenomena in a vertical two-phase flow

    Energy Technology Data Exchange (ETDEWEB)

    Huh, Byung-Gil; Euh, Dong-Jin; Yun, Byong-Jo; Youn, Young-Jung; Yoon, Han-Yeong; Song, Chul-Hwa

    2005-03-01

    The number density transport equations for various bubble groups are used to predict the void fraction and the interfacial area concentration. As the closure relations for number density transport equation, the coalescence due to random collisions and the breakup due to the impact of turbulent eddies is modified based on the previous studies and the bubble expansion term due to the pressure reduction is considered. Also, the coalescence due to a wake entrainment is modeled newly to apply to the number density transport equation. In order to predict the local experimental data, the code is developed that the two-fluid model is coupled systematically with the number density transport equation for each bubble group. As for the results of the numerical analysis, the void fraction and interfacial area concentration are predicted well by the developed code and models although some deviations exist in the values between the prediction and experiment, especially, for the high void fraction conditions.

  11. Experimental investigation of evaporation enhancement for water droplet containing solid particles in flaming combustion area

    Directory of Open Access Journals (Sweden)

    Glushkov Dmitrii O.

    2016-01-01

    Full Text Available The experimental study of integral characteristics of extinguishing liquid (water droplet evaporation in flaming combustion area has been held. Optical methods of two-phase and heterogeneous mixtures diagnostics (“Particle Image Velocimetry” and “Interferometric Particle Imaging” have been used for heat and mass transfer process investigation. It was established that small-size solid particles (for example, carbon particles in droplet structure can enhance water evaporation in flame area. It was shown that the rate of evaporation process depends on concentration and sizes of solid particles in a water droplet. The correlations have been determined between the sizes of solid particles and water droplets for maximum efficiency of fire extinguishing. The physical aspects of the problem have been discussed.

  12. Small pitch pixel sensors\\\\ for the CMS Phase II upgrade

    CERN Document Server

    Steinbrueck, Georg

    2015-01-01

    The CMS collaboration has undertaken two sensor R\\&D programs on thin n-in-p planar and 3D silicon sensor technologies. To cope with the increase in instantaneous luminosity, the pixel area has to be reduced to approximately 2500 $\\mu$m$^{2}$ to keep the occupancy at the percent level. Suggested pixel cell geometries to match this requirement are {50$\\times$50 }$\\mu$...

  13. Beam-Beam effects at the CMS BRIL van-der-Meer scans

    CERN Document Server

    CMS Collaboration

    2017-01-01

    The CMS Beam Radiation Instrumentation and Luminosity Project (BRIL) is devoted to the simulation and measurement of luminosity, beam conditions and radiation fields in the CMS Experiment at CERN. The project is engaged in operating and developing new detectors, compatible with the high luminosity experimental environments at the LHC. BRIL operates several detectors based on different physical principles and technologies. The detectors are calibrated using van-der-Meer scans to measure the luminosity that is a fundamental quantity of the LHC beam. In van-der-Meer scans the count rate in a detector is measured as a function of the distance between beams in the plane perpendicular to beam direction, to extract the underlying beam overlap area. The goal of the van-der-Meer scans is to obtain the calibration constant for each luminometer to be used at calibration then in physics data taking runs. The note presents the overview of beam-beam effects at the van-der-Meer scan and the corresponding corrections that sh...

  14. Results of Experiments on Convective Precipitation Enhancement in the Camaguey Experimental Area, Cuba.

    Science.gov (United States)

    Koloskov, Boris; Zimin, Boris; Beliaev, Vitaly; Seregin, Yury; Chernikov, Albert; Petrov, Victor; Valdés, Mario; Martínez, Daniel; Pérez, Carlos A.; Puente, Guillermo

    1996-09-01

    Experiments on randomized seeding of individual convective clouds and cloud clusters were conducted in the Camaguey experimental area, Cuba, from 1985 through 1990 in order to elucidate whether cold-cloud dynamic seeding can be used to augment convective rainfall. An information measuring system was set up, and primary tools included three instrumented aircraft (AN-26, AN-12 CYCLONE, IL-14), MRL-5 and ARS-3 radars, a system for radiosounding, two special rain gauge networks, and surface weather stations.A total of 232 randomized experiments were carried out during this experimentation period, and 117 individual clouds and 115 cloud clusters were studied during 136 `go' days. Pyrotechnic flares containing silver iodide were ejected in a selected cloud when the seeder aircraft was flying through its top. The seeding effects were monitored by the MRL-5 radar, which was equipped with an automated system for digital processing of data.A total of 46 convective clouds, 29 seeded and 17 nonseeded, were studied during an exploratory experiment in 1985. Analyses of the radar properties of seeded and nonseeded clouds have indicated that the response of convective clouds to AgI seeding is dependent on their type, and the treatment within the range of cloud tops from 6 to 8 km—that is, at top temperatures between 10° and 20°C, is found to increase their maximum height by 13% and the lifetime by 30%, and to enhance rainfall.A confirmatory phase of the experiment in the Camaguey experimental area was conducted during 1986 90. A total of 46 individual convective clouds, 24 seeded and 22 nonseeded, were identified, and their properties were determined using three-dimensional radar data. The results have shown that the AgI seeding of growing clouds with top temperatures over the range from 10° to 20°C increases their lifetime by 24%, maximum height by 9%, area by 64%, and rain volume by 120%, as compared to unseeded clouds. The lifetime, area, and rainfall results are

  15. SKIROC2_CMS an ASIC for testing CMS HGCAL

    Science.gov (United States)

    Borg, J.; Callier, S.; Coko, D.; Dulucq, F.; de La Taille, C.; Raux, L.; Sculac, T.; Thienpont, D.

    2017-02-01

    SKIROC2_CMS is a chip derived from CALICE SKIROC2 that provides 64 channels of low noise charge preamplifiers optimized for 50 pF pin diodes and 10 pC dynamic range. They are followed by high gain and low gain 25 ns shapers, a 13-deep 40 MHz analog memory used as a waveform sampler at 40 MHz. and 12-bit ADCs. A fast shaper followed by discriminator and TDC provide timing information to an accuracy of 50 ps, in order to test TOT and TOA techniques at system level and in test-beam. The chip was sent to fabrication in January 2016 in AMS SiGe 0,35 μm and was received in May. It was tested in the lab during the summer and will be mounted on sensors for beam-tests in the fall.

  16. Last crystals for the CMS chandelier

    CERN Multimedia

    2008-01-01

    In March, the last crystals for CMS’s electromagnetic calorimeter arrived from Russia and China. Like dedicated jewellers crafting an immense chandelier, the CMS ECAL collaborators are working extremely hard to install all the crystals before the start-up of the LHC. One of the last CMS end-cap crystals, complete with identification bar code. Lead tungstate crystals mounted onto one section of the CMS ECAL end caps. Nearly 10 years after the first production crystal arrived at CERN in September 1998, the very last shipment has arrived. These final crystals will be used to complete the end-caps of the electromagnetic calorimeter (ECAL) at CMS. All in all, there are more than 75,000 crystals in the ECAL. The huge quantity of CMS lead tungstate crystals used in the ECAL corresponds to the highest volume ever produced for a single experiment. The excellent quality of the crystals, both in ter...

  17. An experimental aeromagnetic survey in the Volturno valley area (South-Eastern Latium

    Directory of Open Access Journals (Sweden)

    G. Caneva

    1998-06-01

    Full Text Available A helicopter-borne experimental aeromagnetic survey, covering an area of 200 km2, was performed in the Volturno valley area north of the Roccamonfina volcano and south of Venafro in November 1994. Although severe logistical, instrumental and meteorological conditions significantly reduced the planned coverage, the processed magnetic image still shows a remarkable improvement in the description of the geological and structural features of the area in comparison with previous regional aeromagnetic data. A multi-directional shaded relief anomaly map displays two moderately positive NW magnetic bands associated with lavas, pyroclastics and dykes of the Roccamonfina volcanic district together with N-S, NNE-SSW and NE-SW lineations. A comparative magnetic-geologic map allows correlation with known Pleistocene faults and reveals the existence, especially in the area between Sesto Campano and Presenzano, of a larger presence of high susceptibility dykes than seen in the outcrop, which is dominated by non-magnetic carbonatic rocks. We interpret the curvilinear and intricate pattern of magnetic lineaments as suggestive of an extensional setting along the main NW structures with previous strike slip components and of tectonic activity along a N-S fabric; the latter has no superficial evidence and has also been used for magma upwelling. Overall, this local scale investigation shows both the utility and the need for further efforts in high resolution aeromagnetics in Italy both for geological and environmental purposes similar to those successfully carried out in many other countries throughout the world.

  18. Experimental Studies of the Inspection of Areas With Restricted Access Using A0 Lamb Wave Tomography.

    Science.gov (United States)

    Seher, Matthias; Huthwaite, Peter; Lowe, Michael J S

    2016-09-01

    Corrosion damage in inaccessible regions presents a significant challenge to the petrochemical industry, and determining the remaining wall thickness is important to establish the remaining service life. Guided wave tomography is one solution to this and involves transmitting Lamb waves through the area of interest and, subsequently, using the received signals to reconstruct a thickness map of the remaining wall thickness. This avoids the need to access all points on the surface, making the technique well suited to inspection for areas with restricted access. The influence of these areas onto the ability to detect and size surface conditions, such as corrosion damage, using guided wave tomography is assessed. For that, a guided wave tomography system is employed, which is based on low-frequency A0 Lamb waves that are excited and detected with two arrays of electromagnetic acoustic transducers. Two different defect depths are considered with different contrasts relative to the nominal wall thickness, both of which are smoothly varying and well-defined. The influence of areas with restricted surface access, support locations, pipe clamps, and STOPAQ(R) coatings is experimentally tested, and their influence assessed through comparison to a baseline reconstruction without the respective restriction in place, demonstrating only a small influence on the detected value of the remaining wall thickness.

  19. Automatic identification of bullet signatures based on consecutive matching striae (CMS) criteria.

    Science.gov (United States)

    Chu, Wei; Thompson, Robert M; Song, John; Vorburger, Theodore V

    2013-09-10

    The consecutive matching striae (CMS) numeric criteria for firearm and toolmark identifications have been widely accepted by forensic examiners, although there have been questions concerning its observer subjectivity and limited statistical support. In this paper, based on signal processing and extraction, a model for the automatic and objective counting of CMS is proposed. The position and shape information of the striae on the bullet land is represented by a feature profile, which is used for determining the CMS number automatically. Rapid counting of CMS number provides a basis for ballistics correlations with large databases and further statistical and probability analysis. Experimental results in this report using bullets fired from ten consecutively manufactured barrels support this developed model.

  20. Magnet Test Setup of the CMS Tracker ready for installation

    CERN Multimedia

    Maximilien Brice

    2006-01-01

    The pieces of the Tracker that will be operated in the forthcoming Magnet Test and Cosmic Challenge (MTCC) have been transported inside the dummy tracker support tube to the CMS experimental hall (Point 5, Cessy). The operation took place during the night of 12th May, covering the ~15km distance in about three hours. The transport was monitored for shocks, temperature and humidity with the help of the CERN TS-IC section. The Tracker setup comprises segments of the Tracker Inner Barrel (TIB), the Tracker Outer Barrel (TOB) and Tracker EndCaps (TEC) detectors. It represents roughly 1% of the final CMS Tracker. Installation into the solenoid is foreseen to take place on Wednesday 17th May.

  1. The helium cryogenic plant for the CMS superconducting magnet

    CERN Document Server

    Perinic, G; Dagut, F; Dauguet, P; Hirel, P

    2002-01-01

    A new helium refrigeration plant with a cooling capacity of 800 W at 4.45 K, 4500 W between 60 K and 80 K, and 4 g/s liquefaction simultaneously has been designed and is presently being constructed by Air Liquide for CERN. The refrigeration plant will provide the cooling power for the cool down and the operation of the CMS (Compact Muon Solenoid) superconducting coil whose cold mass weighs 225 t. The refrigeration plant will at first be installed in a surface building for the tests of the superconducting magnet. On completion of the tests the cold box will be moved to its final underground position next to the CMS experimental cavern. This paper presents the process design, describes the main components and explains their selection. (4 refs).

  2. Constraining nuclear PDFs with CMS

    CERN Document Server

    Chapon, Emilien

    2017-01-01

    Nuclear parton distribution functions are essential to the understanding of proton-lead collisions. We will review several measurements from CMS that are particularly sensitive to nPDFs. W and Z bosons are medium-blind probes of the initial state of the collisions, and we will present the measurements of their production cross sections in pPb collisions at 5.02 TeV, and as well a asymmetries with an increased sensitivity to nPDFs. We will also report measurements of charmonium production, including the nuclear modification factor of J/psi and psi(2S) in pPb collisions at 5.02 TeV, though other cold nuclear matter effects may also be at play in those processes. At last, we will present measurements of the pseudo-rapidity of dijets in pPb collisions at 5.02 TeV.

  3. OVAL: the CMS Testing Robot

    CERN Document Server

    Chamont, D

    2003-01-01

    Oval is a testing tool which help developers to detect unexpected changes in the behavior of their software. It is able to automatically compile some test programs, to prepare on the fly the needed configuration files, to run the tests within a specified Unix environment, and finally to analyze the output and check expectations. Oval does not provide utility code to help writing the tests, therefore it is quite independant of the programming/scripting language of the software to be tested. It can be seen as a kind of robot which apply the tests and warn about any unexpected change in the output. Oval was developed by the LLR laboratory for the needs of the CMS experiment, and it is now recommended by the CERN LCG project.

  4. CMS Planning and Scheduling System

    CERN Document Server

    Kotamaki, M

    1998-01-01

    The paper describes the procedures and the system to build and maintain the schedules needed to manage time, resources, and progress of the CMS project. The system is based on the decomposition of the project into work packages, which can be each considered as a complete project with its own structure. The system promotes the distribution of the decision making and responsibilities to lower levels in the organisation by providing a state-of-the-art system to formalise the external commitments of the work packages without limiting their ability to modify their internal schedules to best meet their commitments. The system lets the project management focus on the interfaces between the work packages and alerts the management immediately if a conflict arises. The proposed system simplifies the planning and management process and eliminates the need for a large, centralised project management system.

  5. V+jets from CMS

    CERN Document Server

    Zhang, Fengwangdong

    2016-01-01

    This document is dedicated to recent results on the measurements of a vector boson production associated with jets (V+jets) using CMS detector experiment, with a central proton-proton (pp) collision energy of respectively 8 TeV (RunI) and 13 TeV (RunII). The vector boson can be a W boson, Z boson, or photon. The jets are of any flavor, as well as the ones containing heavy flavor quarks, such as bottom(b) quarks. The inclusive cross sections of V+jets processes and differential cross sections as a function of various kinematic observables are presented and compared to several theoretical predictions. In general, the comparison between theoretical calculations and measurement are crucial for improving modeling and precision on QCD dynamics.

  6. CMS silicon tracker milestone 200

    CERN Document Server

    Dierlamm, A

    2002-01-01

    The tracker of CMS will fully consist of silicon micro-strip and pixel sensors. Building a detector with 210 m/sup 2/ sensor surface in about 3 years requires a tightly controlled construction schedule. All different aspects of the production are exercised within a pre- production of 200 modules (Milestone 200) to identify and eliminate possible bottlenecks and to test the complete electronic chain. The quality, process stability and radiation hardness of the silicon sensors will be permanently monitored. Automatic assembly procedure and industrial bonding machines will guarantee a fast and reliable construction. All modules will be tested for signal, noise and pedestals at room temperature and operation temperature of -10 degrees C. Quality assurance of the Milestone 200 sensors and modules including irradiation and stability tests are presented. (6 refs).

  7. Rare B decays at CMS

    CERN Document Server

    Li, Linwei

    2017-01-01

    The flavour changing neutral current decays can be interesting probes for searching for New Physics. Angular distributions of the decay $\\mathrm{B}^0 \\to \\mathrm{K}^{*0} \\mu^ +\\mu^-$ are studied using a sample of proton-proton collisions at $\\sqrt{s} = 8~\\mathrm{TeV}$ collected with the CMS detector at the LHC, corresponding to an integrated luminosity of $20.5~\\mathrm{fb}^{-1}$. An angular analysis is performed to determine $P_1$ and $P_5'$, where $P_5'$ is of particular interest due to recent measurements that indicate a potential discrepancy with the standard model. Based on a sample of 1397 signal events, $P_1$ and $P_5'$ angular parameters are determined as a function of the dimuon invariant mass squared. The measurements are in agreement with standard model predictions.

  8. The CMS Silicon Tracker Alignment

    CERN Document Server

    Castello, R

    2008-01-01

    The alignment of the Strip and Pixel Tracker of the Compact Muon Solenoid experiment, with its large number of independent silicon sensors and its excellent spatial resolution, is a complex and challenging task. Besides high precision mounting, survey measurements and the Laser Alignment System, track-based alignment is needed to reach the envisaged precision.\\\\ Three different algorithms for track-based alignment were successfully tested on a sample of cosmic-ray data collected at the Tracker Integration Facility, where 15\\% of the Tracker was tested. These results, together with those coming from the CMS global run, will provide the basis for the full-scale alignment of the Tracker, which will be carried out with the first \\emph{p-p} collisions.

  9. The CMS Data Management System

    Science.gov (United States)

    Giffels, M.; Guo, Y.; Kuznetsov, V.; Magini, N.; Wildish, T.

    2014-06-01

    The data management elements in CMS are scalable, modular, and designed to work together. The main components are PhEDEx, the data transfer and location system; the Data Booking Service (DBS), a metadata catalog; and the Data Aggregation Service (DAS), designed to aggregate views and provide them to users and services. Tens of thousands of samples have been cataloged and petabytes of data have been moved since the run began. The modular system has allowed the optimal use of appropriate underlying technologies. In this contribution we will discuss the use of both Oracle and NoSQL databases to implement the data management elements as well as the individual architectures chosen. We will discuss how the data management system functioned during the first run, and what improvements are planned in preparation for 2015.

  10. Familiarity breeds contempt: kangaroos persistently avoid areas with experimentally deployed dingo scents.

    Directory of Open Access Journals (Sweden)

    Michael H Parsons

    Full Text Available BACKGROUND: Whether or not animals habituate to repeated exposure to predator scents may depend upon whether there are predators associated with the cues. Understanding the contexts of habituation is theoretically important and has profound implication for the application of predator-based herbivore deterrents. We repeatedly exposed a mixed mob of macropod marsupials to olfactory scents (urine, feces from a sympatric predator (Canis lupus dingo, along with a control (water. If these predator cues were alarming, we expected that over time, some red kangaroos (Macropus rufous, western grey kangaroos (Macropus fuliginosus and agile wallabies (Macropus agilis would elect to not participate in cafeteria trials because the scents provided information about the riskiness of the area. METHODOLOGY/PRINCIPAL FINDINGS: We evaluated the effects of urine and feces independently and expected that urine would elicit a stronger reaction because it contains a broader class of infochemicals (pheromones, kairomones. Finally, we scored non-invasive indicators (flight and alarm stomps to determine whether fear or altered palatability was responsible for the response. Repeated exposure reduced macropodid foraging on food associated with 40 ml of dingo urine, X = 986.75+/-3.97 g food remained as compared to the tap water control, X = 209.0+/-107.0 g (P0.5. Macropodids did not habituate to repeated exposure to predator scents, rather they avoided the entire experimental area after 10 days of trials (R(2 = 83.8; P<0.001. CONCLUSIONS/SIGNIFICANCE: Responses to urine and feces were indistinguishable; both elicited fear-based responses and deterred foraging. Despite repeated exposure to predator-related cues in the absence of a predator, macropodids persistently avoided an area of highly palatable food. Area avoidance is consistent with that observed from other species following repeated anti-predator conditioning, However, this is the first time this response has been

  11. EXPERIMENTAL CALIBRATION OF UNDERGROUND HEAT TRANSFER MODELS UNDER A WINERY BUILDING IN A RURAL AREA

    Directory of Open Access Journals (Sweden)

    Francesco Tinti

    2017-01-01

    Full Text Available Ground temperature and hydrogeological conditions are key parameters for many engineering applications, such as the design of building basements and underground spaces and the assessment of shallow geothermal energy potential. Especially in urban areas, in the very shallow depths, it is diffi cult to fi nd natural undisturbed underground thermal conditions because of anthropic interventions. The assessment of underground behaviour in disturbed conditions will become more and more relevant because of increasing awareness to energy effi ciency and renewable energy topics. The purpose of this paper is to show a three-dimensional representation - based on models calibrated on experimental data - of the underground thermal behaviour aff ected by a building in a rural area in Italy. Temperature varies in space and time and it depends on ground, climate and building characteristics, and all these parameters are taken into account by the seasonal periodic modelling implemented. The results obtained in a context of low urbanization indirectly suggest the importance of these eff ects in dense urban areas; taking greater account of these aspects could lead to improvements in the design of underground spaces and geo-exchanger fi elds for geothermal energy exploitation.

  12. A new visitor centre for CMS

    CERN Multimedia

    2001-01-01

    At the inauguration of the new CMS visitor centre. The CMS experiment inaugurated a new visitor centre at its Cessy site on 14 June. This will allow the thousands of people who come to CERN each year to follow the construction of one the Laboratory's flagship experiments first-hand. CERN receives over 20,000 visitors each year. Until recently, many of them were taken on a guided tour of one of the LEP experiments. With the closure of LEP, however, trips underground are no longer possible, and the Visits' Service has put in place a number of other itineraries (Bulletin 46/2000). Since the CMS detector will be almost entirely constructed in a surface hall, it is now taking a big share of the limelight. The CMS visitor centre has been built on a platform overlooking CMS construction. It contains a set of clear descriptive posters describing the experiment, along with a video projection showing animations and movies about CMS construction. In the coming weeks, a display of CMS detector elements will be added, as...

  13. LHCC COMPREHENSIVE REVIEW OF CMS (JULY 07)

    CERN Multimedia

    Extract from the Draft Report 1. EXECUTIVE SUMMARY The CMS Collaboration has made significant progress towards producing a detector ready for LHC operation in 2008. The past year saw all sub-detector groups success fully produce high-quality components and modules, and integrate them into the final objects to be installed into the CMS magnet. Installation and commissioning of final components in the CMS UXC55 cavern are well-under-way. In particular, the heavy lowering of detector elements into the CMS experiment cavern is a major success. The new CMS master schedule V36 incorporates the revised LHC machine schedule and includes an optimized detector sequencing. In spite of various delays, it remains possible that CMS will have an initial detector ready to exploit the initial LHC run in spring 2008. Installation of the Electromagnetic Calorimeter End-Cap (EE) and Pre-shower (ES) detectors is scheduled to be completed no sooner than July 2008 and CMS now plans to install the complete Pixel Detector for ...

  14. CMS inaugurates its high-tech visitor centre

    CERN Multimedia

    Antonella Del Rosso

    2014-01-01

    The new Building SL53 on CERN’s Cessy site in France is ready to welcome the thousands of visitors (30,000 in 2013) who come to learn about CMS each year. It boasts low energy consumption and the possibility, in the future, of being heated by recycling the heat given off by the detector.   The new Building SL53 at CERN’s Cessy site in France will be inaugurated on 24 May 2014. “Constructed by the GS Department and the firm Dimensione, the building meets the operational requirements of the CMS experiment, which require the uninterrupted use of its infrastructure,” explains Martin Gastal, the member of the collaboration in charge of the project. Its 560 m2 surface area features a meeting room, eight offices, an open space for CMS users, a rest area with a kitchen, sanitary facilities including showers, and a conference room in which to receive visitors. “The new conference room on the ground floor can accommodate 50 people,&am...

  15. Removal of a section of the CMS beam pipe

    CERN Multimedia

    CERN Bulletin

    2013-01-01

    Over recent weeks, members of the TE-VSC group have been removing seven components of the beam pipe located at the heart of the CMS detector. The delicate operations involved have been performed in several stages as the detector opening work has progressed.   Of the seven components concerned, only the central vacuum pipe will be replaced. The other six will be stored in a special radiation-shielded area on the surface and subsequently reinstalled ready for the resumption of machine operation. The video below, which was filmed on 15 May, shows one of the seven components of the vacuum pipe - the HFCT2, located to the right of the interaction point – being brought up from the CMS cavern to the surface by the transport team at Point 5.

  16. Numerical model validation using experimental data: Application of the area metric on a Francis runner

    Science.gov (United States)

    Chatenet, Q.; Tahan, A.; Gagnon, M.; Chamberland-Lauzon, J.

    2016-11-01

    Nowadays, engineers are able to solve complex equations thanks to the increase of computing capacity. Thus, finite elements software is widely used, especially in the field of mechanics to predict part behavior such as strain, stress and natural frequency. However, it can be difficult to determine how a model might be right or wrong, or whether a model is better than another one. Nevertheless, during the design phase, it is very important to estimate how the hydroelectric turbine blades will behave according to the stress to which it is subjected. Indeed, the static and dynamic stress levels will influence the blade's fatigue resistance and thus its lifetime, which is a significant feature. In the industry, engineers generally use either graphic representation, hypothesis tests such as the Student test, or linear regressions in order to compare experimental to estimated data from the numerical model. Due to the variability in personal interpretation (reproducibility), graphical validation is not considered objective. For an objective assessment, it is essential to use a robust validation metric to measure the conformity of predictions against data. We propose to use the area metric in the case of a turbine blade that meets the key points of the ASME Standards and produces a quantitative measure of agreement between simulations and empirical data. This validation metric excludes any belief and criterion of accepting a model which increases robustness. The present work is aimed at applying a validation method, according to ASME V&V 10 recommendations. Firstly, the area metric is applied on the case of a real Francis runner whose geometry and boundaries conditions are complex. Secondly, the area metric will be compared to classical regression methods to evaluate the performance of the method. Finally, we will discuss the use of the area metric as a tool to correct simulations.

  17. Interview with Jim Virdee, CMS Spokesperson

    CERN Multimedia

    CERN Video Productions

    2009-01-01

    Questions : 1. How does it feel to be Spokesperson of a large worldwide collaboration as CMS at the very moment when the LHC is going to produce the first data? 2. Is your detector ready for data taking? 3. Did you take advantage of the long shut down? 4. What can you expect to find at the initial energy at 3.5 TeV? 5. What was CMS designed for and why do you have the word Muon in the acronym? 6. What is going to happen in the CMS control room on collision day?

  18. CMS AS A WEB PROGRAMMING LEARNING TOOL

    Directory of Open Access Journals (Sweden)

    Zoran T Lovreković

    2015-10-01

    Full Text Available This paper discusses how some of Knowledge Management postulates can be applied in the training of students for Web Programming. CMS is a most vital part of every web applications. Because of that, it is suggested that professor should give students lessons about some as simple as possible CMS in detail, and after that allow them to change, upgrade, and improve this CMS in a several steps, throw their own work and consultations and discussion with teacher and other students. Some of possible requirements for students work are givent in this paper, too.

  19. The CMS Masterclass and Particle Physics Outreach

    Energy Technology Data Exchange (ETDEWEB)

    Cecire, Kenneth [Notre Dame U.; Bardeen, Marjorie [Fermilab; McCauley, Thomas [Notre Dame U.

    2014-01-01

    The CMS Masterclass enables high school students to analyse authentic CMS data. Students can draw conclusions on key ratios and particle masses by combining their analyses. In particular, they can use the ratio of W^+ to W^- candidates to probe the structure of the proton, they can find the mass of the Z boson, and they can identify additional particles including, tentatively, the Higgs boson. In the United States, masterclasses are part of QuarkNet, a long-term program that enables students and teachers to use cosmic ray and particle physics data for learning with an emphasis on data from CMS.

  20. The CMS Masterclass and Particle Physics Outreach

    Science.gov (United States)

    Cecire, Kenneth; Bardeen, Marjorie; McCauley, Thomas

    2014-04-01

    The CMS Masterclass enables high school students to analyse authentic CMS data. Students can draw conclusions on key ratios and particle masses by combining their analyses. In particular, they can use the ratio of W+ to W- candidates to probe the structure of the proton, they can find the mass of the Z boson, and they can identify additional particles including, tentatively, the Higgs boson. In the United States, masterclasses are part of QuarkNet, a long-term program that enables students and teachers to use cosmic ray and particle physics data for learning with an emphasis on data from CMS.

  1. Experimental study of concentrated solutions containing sodium and chloride pollutants in SG flow restricted areas

    Energy Technology Data Exchange (ETDEWEB)

    You, D.; Lefefre, S.; Feron, D. [CEA-Saclay, Lab. d' Etude de la Corrosion Aqueuse, Gif-sur-Yvette (France); Vaillant, F. [EDF-Les Renardieres - DRD/EMA, Moret-sur-Loing (France)

    2002-07-01

    In steam generators, the hideout processes occur in flow restricted areas. Non volatile pollutants, i.e. species less soluble in the vapour phase than in the liquid water phase, accumulate such as sodium hydroxide or sodium chloride. The thermodynamic equilibrium between these two phases is described in terms of liquid-vapour equilibrium constants for soluble species and boiling constant for the solvent. The presented experimental investigation has been realised with the EVA device: the boiling pressure evolution has been measured during the hideout process of sodium hydroxide and sodium chloride aqueous solutions. The results clearly demonstrated that high sodium hydroxide aqueous solutions are thermodynamically possible while with sodium chloride, it seems that precipitation occurs before. (authors)

  2. A new spark detection system for the electrostatic septa of the SPS North (experimental) Area

    CERN Multimedia

    Barlow, R A; Borburgh, J; Carlier, E; Chanavat, C; Pinget, B

    2013-01-01

    Electrostatic septa (ZS) are used in the extraction of the particle beams from the CERN SPS to the North Area experimental zone. These septa employ high electric fields, generated from a 300 kV power supply, and are particularly prone to internal sparking around the cathode structure. This sparking degrades the electric field quality, consequently affecting the extracted beam, vacuum and equipment performance. To mitigate these effects, a Spark Detection System (SDS) has been realised, which is based on an industrial SIEMENS S7-400 programmable logic controller and deported Boolean processors modules interfaced through a PROFINET fieldbus. The SDS interlock logic uses a moving average spark rate count to determine if the ZS performance is acceptable. Below a certain spark rate it is probable that the ZS septa tank vacuum can recover, thus avoiding transition into a\

  3. Life@CMS: Combining Higgs search data with ATLAS

    CERN Multimedia

    CERN

    2011-01-01

    First combined results from the CMS and ATLAS Higgs search at the LHC. Including exclusive footage from internal CMS meetings. For more information, visit: http://cms.web.cern.ch/news/atlas-and-cms-combine-summer-11-search-limits-standard-model-higgs

  4. 42 CFR 460.20 - Notice of CMS determination.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Notice of CMS determination. 460.20 Section 460.20... ELDERLY (PACE) PACE Organization Application and Waiver Process § 460.20 Notice of CMS determination. (a... application to CMS, CMS takes one of the following actions: (1) Approves the application. (2) Denies...

  5. 42 CFR 489.53 - Termination by CMS.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 5 2010-10-01 2010-10-01 false Termination by CMS. 489.53 Section 489.53 Public... Reinstatement After Termination § 489.53 Termination by CMS. (a) Basis for termination of agreement with any provider. CMS may terminate the agreement with any provider if CMS finds that any of the following...

  6. 42 CFR 426.517 - CMS' statement regarding new evidence.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false CMS' statement regarding new evidence. 426.517... DETERMINATIONS Review of an NCD § 426.517 CMS' statement regarding new evidence. (a) CMS may review any new... experts; and (5) Presented during any hearing. (b) CMS may submit a statement regarding whether the...

  7. CMS emulsion pictures during LS1

    CERN Multimedia

    Di Ferdinando, Donato

    2013-01-01

    These images were taken at the CMS experimental cavern during Long Shutdown 1, installing pinhole cameras at different points of the cavern and exposing them for days. The development of the film was done by Donato di Ferdinando from INFN Bologna. A pinhole camera is a light-tight box where a small hole is made (diameter of the order of microns); a light-sensitive material is set in the back of the hole. As sensitive material a nuclear emulsion film from the OPERA experiment was used. It is a special photographic emulsion optimized (silver grains enriched) for the detection of charged particles. A very large amount of nuclear emulsions where used in Opera experiment, at the Gran Sasso Underground Labs; nuclear emulsions must detect the charged tau-leptons emerging from the interaction between the "oscillated" tau-neutrino coming from the pure muon-neutrino beam produced at CERN (the CNGS beam). The oscillations theory of neutrino expects that muon neutrinos oscillate to tau-neutrinos and due to this behavior ...

  8. Jet-track correlations with CMS

    CERN Document Server

    Velicanu, Dragos Alexandru

    2015-01-01

    Jet quenching is one of the established signatures of the Quark Gluon Plasma, and this phenomenon has been studied extensively in high energy heavy ion experiments over the last decade. Despite significant progress made in those studies, the specifics of the energy loss mechanisms and the details of jet-medium interactions require further quantitative understanding. Studies of two-dimensional angular correlations of charged hadrons with respect to reconstructed jets make it possible to experimentally assess the energy radiation patterns of an energetic parton traversing the medium as well as its fragmentation function. In this talk, we will present new differential measurements of charged particle densities and energy flow about the jet direction as a function of relative azimuth and relative pseudorapidity from 2.76 TeV PbPb and pp collisions recorded by the CMS Collaboration. With a sample of back-to-back dijets, previously used to reconstruct the event-wise momentum imbalance (missing pT), we explore modif...

  9. CMS bottomonia results from Run I

    CERN Document Server

    Jo, Mihee

    2015-01-01

    Bottomonia are important probes of the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. The production cross section of the three Y states (1S, 2S, 3S) was measured separately using the Compact Muon Solenoid (CMS) experimental apparatus, in pp and PbPb collisions at 2.76 TeV. A strong suppression is observed in PbPb collisions, by up to a factor of 2 and 10 for the Y(1S) and Y(2S) respectively. The Y(3S) was not observed in PbPb collisions, being suppressed by more than 7 at the 95pct confidence level. This suppression was seen to also depend on centrality, but not significantly on transverse momentum or rapidity. A similar suppression pattern of the excited states (2S and 3S) as compared to the ground state (1S), though less pronounced than in PbPb data, was observed also when analyzing the pPb data at 5.02 TeV center of mass collision energy. A surprising dependence of the excited over the ground state ratio, as a function of the global event...

  10. Rare Higgs decays with ATLAS and CMS

    CERN Document Server

    Groth-Jensen, J; The ATLAS collaboration

    2013-01-01

    In the summer of 2012 the ATLAS and CMS collaborations discovered a new particle with a mass of approximately 125 GeV via decays to photon, $W$ and $Z$ boson pairs with rates consistent with those of the SM Higgs boson. There are three experimentally accessible channels at the LHC for detecting Higgs boson decays to fermions: $H o bar{b}$ , $H o au^{+} au^{-}$ and $H o mu^{+} mu^{-}$ . The branching ratios for these decays are proportional to the fermion masses with the $bar{b}$ and $ au^{+} au^{-}$ decay modes dominant for $m_H$ = 125 GeV. The $H o mu^{+} mu^{-}$ decay has a clean final-state signature and it is the only channel where a Higgs coupling to the second generation fermions can be measured at the LHC. This is a very challenging measurement due to a small $H o mu^{+} mu^{-}$ branching ratio and high SM backgrounds. The SM branching ratio for the H → μ+μ− decays is of the order of $(28 − 6) imes 10^{−5}$ in the Higgs boson mass range 110–150 GeV. The dominant irreducible SM background is...

  11. Experimental and Theoretical Analysis of Storage Friendly TCP Performance in Distributed Storage Area Network

    Directory of Open Access Journals (Sweden)

    Suresh Muknahallipatna

    2007-08-01

    Full Text Available Fibre channel storage area networks (SAN are widely implemented in production data center environments. Recently the storage industry has moved towards deployment of distributed SANs (DSAN, geographically dispersed across large physical distances. In a DSAN, specialized gateway devices interconnect the individual Fibre Channel (FC fabrics over IP networks using TCP/IP based protocols (iFCP or FCIP or over metro to long distance optical networks such as Dense Wavelength Division Multiplexing (DWDM based networks that utilize native FC ports supporting large numbers of link credits. When using TCP/IP based storage networking protocols to interconnect local FC fabrics in a DSAN, the sustained throughput achievable depends upon the link characteristics and TCP/IP stack implementation. Sustaining maximum possible storage traffic throughput across the wide area network enables practical DSAN deployments by maintaining the required site to site service level agreements.This study explores the effects of several TCP/IP modifications on sustained traffic throughput for a DSAN interconnected via iFCP gateways across an impaired network. The TCP/IP stack modifications, known as storage friendly, include changes to the window scaling, congestion avoidance, and fast recovery algorithms. The theoretical background and experimental results are presented to explain and illustrate these modifications.

  12. CMS rewards eight of its suppliers

    CERN Multimedia

    2002-01-01

    At the third awards ceremony to honour its top suppliers, the CMS collaboration presented awards to eight firms. Seven of them are involved in the manufacture of the magnet. The winners of the third CMS suppliers' awards visit the assembly site for the detector. Unsurprisingly, the CMS magnet was once again in the limelight at the third awards ceremony in honour of the collaboration's top suppliers. 'Unsurprisingly', because this magnet, which must produce an intense field of 4 Tesla inside an enormous volume (12 metres in diameter and 13 metres in length) is the detector's key component. As a result, many firms are involved in its construction. The CMS suppliers' awards are an annual event aimed at rewarding the exceptional efforts of certain companies. Firms are only eligible once they have delivered at least 50% of their supplies. This year, the collaboration honoured eight firms at a ceremony held on Monday 4 March in the main auditorium. Seven of th...

  13. CMS in historic accord with China

    CERN Multimedia

    Patrice Loiez

    1999-01-01

    Following signature of the CMS Memorandum of Understanding, Research Director of Collider Programmes Roger Cashmore (left) shakes hands with Professor WANG Naiyan, Vice-President of the National Natural Science Foundation of China.

  14. HB+ inserted into the CMS Solenoid

    CERN Multimedia

    Tejinder S. Virdee, CERN

    2006-01-01

    The first half of the barrel hadron calorimeter (HB+) has been inserted into the superconducting solenoid of CMS, in preparation for the magnet test and cosmic challenge. The operation went smoothly, lasting a couple of days.

  15. Predicting dataset popularity for the CMS experiment

    Science.gov (United States)

    Kuznetsov, V.; Li, T.; Giommi, L.; Bonacorsi, D.; Wildish, T.

    2016-10-01

    The CMS experiment at the LHC accelerator at CERN relies on its computing infrastructure to stay at the frontier of High Energy Physics, searching for new phenomena and making discoveries. Even though computing plays a significant role in physics analysis we rarely use its data to predict the system behavior itself. A basic information about computing resources, user activities and site utilization can be really useful for improving the throughput of the system and its management. In this paper, we discuss a first CMS analysis of dataset popularity based on CMS meta-data which can be used as a model for dynamic data placement and provide the foundation of data-driven approach for the CMS computing infrastructure.

  16. The CMS "Higgs Boson Goose Game" Poster

    CERN Multimedia

    Davis, Siona Ruth

    Building and operating the CMS Detector is a complicated endeavour! Now, more than 20 years after the detector was conceived, the CMS Bologna group proposes to follow the steps of this challenging project by playing "The Higgs Boson Goose Game", illustrating CMS activities and goals. The concept of the game is inspired by the traditional "Game of the Goose". The underlying idea is that the progress of building and operating a detector at the LHC is similar to the progress of the pawns on the game board: it is fast at times, bringing rewards and satisfaction, while sometimes unexpected problems cause delays or even a step back requiring CMS scientists to use all of their skill and creativity to devise new solutions.

  17. Results from CMS on Higgs boson physics

    CERN Document Server

    Azzurri, Paolo

    2017-01-01

    A selection of measurements and results of Higgs physics obtained by the CMS experiment are presented, obtained with proton collision data collected in 2015 and 2016 at the center-of-mass energy of 13 TeV.

  18. Predicting dataset popularity for the CMS experiment

    CERN Document Server

    INSPIRE-00005122; Li, Ting; Giommi, Luca; Bonacorsi, Daniele; Wildish, Tony

    2016-01-01

    The CMS experiment at the LHC accelerator at CERN relies on its computing infrastructure to stay at the frontier of High Energy Physics, searching for new phenomena and making discoveries. Even though computing plays a significant role in physics analysis we rarely use its data to predict the system behavior itself. A basic information about computing resources, user activities and site utilization can be really useful for improving the throughput of the system and its management. In this paper, we discuss a first CMS analysis of dataset popularity based on CMS meta-data which can be used as a model for dynamic data placement and provide the foundation of data-driven approach for the CMS computing infrastructure.

  19. The CMS Higgs Boson Goose Game

    CERN Document Server

    Cavallo, Francesca Romana

    2015-01-01

    Building and operating the CMS Detector is a complicated endeavour! Now, more than 20 years after the detector was conceived, the CMS Bologna group proposes to follow the steps of this challenging project by playing The Higgs Boson Goose Game, illustrating CMS activities and goals.The concept of the game is inspired by the traditional Game of the Goose. The underlying idea is that the progress of building and operating a detector at the LHC is similar to the progress of the pawns on the game board it is fast at times, bringing rewards and satisfaction, while sometimes unexpected problems cause delays or even a step back requiring CMS scientists to use all of their skill and creativity to devise new solutions.

  20. Particle Flow at CMS and the ILC

    CERN Document Server

    Ballin, J A C

    2010-01-01

    This thesis describes hadron reconstruction at the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) at CERN, Geneva. The focus is on the particle flow reconstruction of these objects. This thesis revisits the subject of the CMS calorimeters' non-linear response to hadrons. Data from testbeam experiments conducted in 2006 & 2007 is compared with simulations and substantial differences are found. A particle flow calibration to correct the energy response of the testbeam data is evaluated. The reconstructed jet response is found to change by ~ 5% when a data-driven calibration is used in place of the calibration derived from simulation. Collision data taken at the early stage of CMS' commissioning is also presented. The hadron response in data is determined to be compatible with testbeam results presented in this thesis. This thesis also details the use of neural networks to improve the energy measurement of hadrons at CMS. The networks are implemented in a functional and concurrent ...

  1. CMS Innovation Center - Data and Reports

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CMS Innovation Center maintains an expanding portfolio supporting the development and testing of innovative health care payment and service delivery models. As...

  2. File level provenance tracking in CMS

    Energy Technology Data Exchange (ETDEWEB)

    Jones, C.D.; Kowalkowski, J.; Paterno, M.; Sexton-Kennedy, L.; Tanenbaum, W.; /Fermilab; Riley, D.S.; /Cornell U., LEPP

    2009-05-01

    The CMS off-line framework stores provenance information within CMS's standard ROOT event data files. The provenance information is used to track how each data product was constructed, including what other data products were read to do the construction. We will present how the framework gathers the provenance information, the efforts necessary to minimize the space used to store the provenance in the file and the tools that will be available to use the provenance.

  3. File Level Provenance Tracking in CMS

    CERN Document Server

    Jones, C D; Paterno, M; Sexton-Kennedy, L; Tanenbaum, W; Riley, D S

    2009-01-01

    The CMS off-line framework stores provenance information within CMS's standard ROOT event data files. The provenance information is used to track how each data product was constructed, including what other data products were read to do the construction. We will present how the framework gathers the provenance information, the efforts necessary to minimise the space used to store the provenance in the file and the tools that will be available to use the provenance.

  4. File level provenance tracking in CMS

    Energy Technology Data Exchange (ETDEWEB)

    Jones, C D; Kowalkowski, J; Paterno, M; Sexton-Kennedy, E; Tanenbaum, W [Fermi National Accelerator Laboratory, PO Box 500, Batavia IL 60510-5011 (United States); Riley, D S, E-mail: cdj@fnal.go [Wilson Laboratory, Cornell University, Ithaca NY 14853-8001 (United States)

    2010-04-01

    The CMS off-line framework stores provenance information within CMS's standard ROOT event data files. The provenance information is used to track how each data product was constructed, including what other data products were read to do the construction. We will present how the framework gathers the provenance information, the efforts necessary to minimise the space used to store the provenance in the file and the tools that will be available to use the provenance.

  5. Diffractive and Exclusive Processes at CMS

    CERN Document Server

    Kuznetsova, Ekaterina

    2014-01-01

    We present an overview of the CMS results on diffractive and exclusive production.Measurements of inclusive single and double diffractive production are discussedas well as measurements of the diffractive production at a hard scale. Measurementsof charged particle multiplicities for single diffractive enhanced data sample and studies of central diffractive jet production were perfrmed in a collaboration with the TOTEM experiment. CMS results on cross section measurements for exclusive dilepton and WW production are also presented.

  6. Track and Vertex Reconstruction in CMS

    CERN Document Server

    Adam, W

    2006-01-01

    The CMS experiment relies on a Silicon pixel and micro-strip tracker for the reconstruction of tracks and vertices of charged particles in the harsh environment of proton and heavy-ion collisions at the LHC at CERN. An outline of the basic track and vertex reconstruction algorithms used in CMS is given and their performance is described. Results of more advanced algorithms like the Gaussian Sum Filter for electron reconstruction and robust vertex fitters are shown.

  7. The CMS Journey to LHC Physics

    CERN Document Server

    CERN. Geneva

    2007-01-01

    A history of construction, encompassing the R&D and challenges faced over the last decade and a half, will be recalled using selected examples. CMS is currently in the final stages of installation and commissioning is gathering pace. After a short status report of where CMS stands today some of the expected (great) physics to come will be outlined. * Tea & coffee will be served at 16:00.

  8. CMS Grid Activities in Europe

    Institute of Scientific and Technical Information of China (English)

    C.Grandi; L.Berti; 等

    2001-01-01

    The CMS experiment at the CERN LHC collider is producing large amounts of simulated data in order to provide an adequate statistic for the Trigger System design.These productions are performed in a distributed environment,prototyping the hierarchical model of LHC computing centers developed by MONARC.A GRID approach is being used for interconnecting the Regional Centers.The main issues which are currently addressed are:automatic submission of data production requests to available productioin sites,data transfer among production sites,“best-replica” location and submission of enduser analysis job to the appropriate Regional Center,In each production site different hardware configurations are being tested and exploited.Furthermore robust job submission systems.which are also able to provide the needed bookkeeping of the produced data are being developed.BOSS(Batch Object Submission System)is an interface to the local computing center scheduling system that has been developed in order to allow recording in a relational database of information produced by the jobe running on the batch facilities A summary of the current activites and a plan for the use of DataGrid PM9 tools are presented.

  9. The CMS Condition Database system

    CERN Document Server

    Govi, Giacomo Maria; Ojeda-Sandonis, Miguel; Pfeiffer, Andreas; Sipos, Roland

    2015-01-01

    The Condition Database plays a key role in the CMS computing infrastructure. The complexity of the detector and the variety of the sub-systems involved are setting tight requirements for handling the Conditions. In the last two years the collaboration has put an effort in the re-design of the Condition Database system, with the aim to improve the scalability and the operability for the data taking starting in 2015. The re-design has focused in simplifying the architecture, using the lessons learned during the operation of the previous data-taking period. In the new system the relational features of the database schema are mainly exploited to handle the metadata ( Tag and Interval of Validity ), allowing for a limited and controlled set of queries. The bulk condition data ( Payloads ) are stored as unstructured binary data, allowing the storage in a single table with a common layout for all of the condition data types. In this presentation, we describe the full architecture of the system, including the serv...

  10. CMS prepares for new challenges

    CERN Multimedia

    Antonella Del Rosso

    2014-01-01

    One of the world’s largest physics experiments has just had a change in leadership. This is a chance for the collaboration to take stock of the tremendous work done for LS1 and to prepare for the challenges that lie ahead.   From left to right: Kerstin Borras, Tiziano Camporesi and Paris Sphicas. “The keyword is teamwork. That’s the only way you can effectively manage a large number of extremely talented and motivated people,” says Tiziano Camporesi who took the reins of the CMS collaboration at the beginning of the year. The recipe might seem easier on paper than in practice. However, given his 28 years at CERN, two of which he spent as the head of the DELPHI collaboration, Camporesi has extensive experience in managing large scientific collaborations and success in this respect is well within his reach: “I have learned many lessons from the past and I believe that building consensus is instrumental to successful leadership.” The C...

  11. Virtual Data in CMS Analysis

    CERN Document Server

    Arbree, A; Bourilkov, D; Cavanaugh, R J; Graham, G; Rodríguez, J; Wilde, M; Zhao, Y

    2003-01-01

    The use of virtual data for enhancing the collaboration between large groups of scientists is explored in several ways: - by defining ``virtual'' parameter spaces which can be searched and shared in an organized way by a collaboration of scientists in the course of their analysis - by providing a mechanism to log the provenance of results and the ability to trace them back to the various stages in the analysis of real or simulated data - by creating ``check points'' in the course of an analysis to permit collaborators to explore their own analysis branches by refining selections, improving the signal to background ratio, varying the estimation of parameters, etc. - by facilitating the audit of an analysis and the reproduction of its results by a different group, or in a peer review context. We describe a prototype for the analysis of data from the CMS experiment based on the virtual data system Chimera and the object-oriented data analysis framework ROOT. The Chimera system is used to chain together several s...

  12. Heavy ion results from CMS

    CERN Document Server

    Milosevic, Jovan

    2016-01-01

    Two- and multi-particle angular correlations in pp, pPb and PbPb collisions at the LHC energies are presented as a function of centrality, charged-particle multiplicity and transverse momentum ($p_{T}$). The data were collected using the CMS detector. The Fourier coefficents in PbPb collisions are measured over an extended $p_{T}$ range up to 100 GeV/c. These $v_{n}$ measurements at high-$p_{T}$ are complementary to the $R_{AA}$ measurements. The elliptic flow of charged and strange particles and the triangular flow of charged particles in pp collisions is measured using the two-particle correlations. A clear mass ordering effect is observed for low-$p_{T}$ $v_{2}$ values. For the first time, in 13 TeV pp collisions, the $v_{2}$ is extracted from four- and six-particle correlations, and is comparable to the $v_{2}$ from two-particle correlations. This supports the collective nature of the long-range correlations in high-multiplicity pp collisions. A Principle Component Analysis (PCA) of two-particle correlati...

  13. Virtual data in CMS analysis

    Energy Technology Data Exchange (ETDEWEB)

    A. Arbree et al.

    2003-10-01

    The use of virtual data for enhancing the collaboration between large groups of scientists is explored in several ways: by defining ''virtual'' parameter spaces which can be searched and shared in an organized way by a collaboration of scientists in the course of their analysis; by providing a mechanism to log the provenance of results and the ability to trace them back to the various stages in the analysis of real or simulated data; by creating ''check points'' in the course of an analysis to permit collaborators to explore their own analysis branches by refining selections, improving the signal to background ratio, varying the estimation of parameters, etc.; by facilitating the audit of an analysis and the reproduction of its results by a different group, or in a peer review context. We describe a prototype for the analysis of data from the CMS experiment based on the virtual data system Chimera and the object-oriented data analysis framework ROOT. The Chimera system is used to chain together several steps in the analysis process including the Monte Carlo generation of data, the simulation of detector response, the reconstruction of physics objects and their subsequent analysis, histogramming and visualization using the ROOT framework.

  14. The CMS pixel readout chip for the Phase 1 Upgrade

    CERN Document Server

    Hits, Dmitry

    2015-01-01

    The present CMS pixel Read Out Chip (ROC) was designed for operation at a bunch spacing of 25\\,ns and to be efficient up to the nominal instantaneous luminosity of 10$^{34} \\rm cm^{-2} \\rm s^{-1}$. Based on the excellent LHC performance to date and the upgrade plans for the accelerators, it is anticipated that the instantaneous luminosity could reach $2\\times10^{34} \\rm cm^{-2} \\rm s^{-1}$ before the Long Shutdown 2 (LS2) in 2018, and well above this by the LS3 in 2022. That is why a new ROC has been designed and why a completely new pixel detector will be built with a planned installation in CMS during an extended winter shutdown in 2016/17. The ROC for the upgraded pixel detector is an evolution of the present architecture. It will be manufactured in the same 250\\,nm CMOS process. The core of the architecture is maintained, with enhancement in performance in three main areas: readout protocol, reduced data loss and enhanced analog performance. The main features of the new CMS pixel ROC are presented togeth...

  15. The CMS Pixel Readout Chip for the Phase 1 Upgrade

    Science.gov (United States)

    Hits, D.; Starodumov, A.

    2015-05-01

    The present CMS pixel Read Out Chip (ROC) was designed for operation at a bunch spacing of 25 ns and to be efficient up to the nominal instantaneous luminosity of 1034 cm-2 s-1. Based on the excellent LHC performance to date and the upgrade plans for the accelerators, it is anticipated that the instantaneous luminosity could reach 2×1034 cm-2 s-1 before the Long Shutdown 2 (LS2) in 2018, and well above this by the LS3 in 2022. That is why a new ROC has been designed and why a completely new pixel detector will be built with a planned installation in CMS during an extended winter shutdown in 2016/17. The ROC for the upgraded pixel detector is an evolution of the present architecture. It will be manufactured in the same 250 nm CMOS process. The core of the architecture is maintained, with enhancement in performance in three main areas: readout protocol, reduced data loss and enhanced analog performance. The main features of the new CMS pixel ROC are presented together with measured performance of the chip.

  16. The CMS Magnetic Field Map Performance

    CERN Document Server

    Klyukhin, VI; Sarycheva, L I; Klyukhin, V I; Ball, A; Gaddi, A; Amapane, N; Gerwig, H; Andreev, V; Cure, B; Mulders, M; Loveless, R; Karimaki, V; Popescu, S; Herve, A

    2010-01-01

    The Compact Muon Solenoid (CMS) is a general-purpose detector designed to run at the highest luminosity at the CERN Large Hadron Collider (LHC). Its distinctive featuresinclude a 4 T superconducting solenoid with 6 m diameter by 12.5 m long free bore, enclosed inside a 10000-ton return yoke made of construction steel. Accurate characterization of the magnetic field everywhere in the CMS detector is required. During two major tests of the CMS magnet the magnetic flux density was measured inside the coil in a cylinder of 3.448 m diameter and 7 m length with a specially designed field-mapping pneumatic machine as well as in 140 discrete regions of the CMS yoke with NMR probes, 3-D Hall sensors and flux-loops. A TOSCA 3-D model of the CMS magnet has been developed to describe the magnetic field everywhere outside the tracking volume measured with the field-mapping machine. A volume based representation of the magnetic field is used to provide the CMS simulation and reconstruction software with the magnetic field ...

  17. Distributed computing grid experiences in CMS

    CERN Document Server

    Andreeva, Julia; Barrass, T; Bonacorsi, D; Bunn, Julian; Capiluppi, P; Corvo, M; Darmenov, N; De Filippis, N; Donno, F; Donvito, G; Eulisse, G; Fanfani, A; Fanzago, F; Filine, A; Grandi, C; Hernández, J M; Innocente, V; Jan, A; Lacaprara, S; Legrand, I; Metson, S; Newbold, D; Newman, H; Pierro, A; Silvestris, L; Steenberg, C; Stockinger, H; Taylor, Lucas; Thomas, M; Tuura, L; Van Lingen, F; Wildish, Tony

    2005-01-01

    The CMS experiment is currently developing a computing system capable of serving, processing and archiving the large number of events that will be generated when the CMS detector starts taking data. During 2004 CMS undertook a large scale data challenge to demonstrate the ability of the CMS computing system to cope with a sustained data- taking rate equivalent to 25% of startup rate. Its goals were: to run CMS event reconstruction at CERN for a sustained period at 25 Hz input rate; to distribute the data to several regional centers; and enable data access at those centers for analysis. Grid middleware was utilized to help complete all aspects of the challenge. To continue to provide scalable access from anywhere in the world to the data, CMS is developing a layer of software that uses Grid tools to gain access to data and resources, and that aims to provide physicists with a user friendly interface for submitting their analysis jobs. This paper describes the data challenge experience with Grid infrastructure ...

  18. Guido Tonelli elected next CMS spokesperson

    CERN Multimedia

    2009-01-01

    Guido Tonelli has been elected as the next CMS spokesperson. He will take over from Jim Virdee on January 1, 2010, and will head the collaboration through the first crucial year of data-taking. Guido Tonelli, CMS spokesperson-elect, into the CMS cavern. "It will be very tough and there will be enormous pressure," explains Guido Tonelli, CMS spokesperson-elect. "It will be the first time that CMS will run for a whole year so it is important to go through the checklist to be able to take good quality data." Tonelli, who is currently CMS Deputy spokesperson, will take over from Jim Virdee on January 1, 2010 – only a few months into CMS’s first full year of data-taking. "The collisions will probably be different to our expectations. So it’s going to take the effort of the entire collaboration worldwide to be ready for this new phase." Born in Italy, Tonelli originally studied at the University of Pisa, where he is now a Professo...

  19. Russian institute receives CMS Gold Award

    CERN Multimedia

    Patrice Loïez

    2003-01-01

    The Snezhinsk All-Russian Institute of Scientific Research for Technical Physics (VNIITF) of the Russian Federal Nuclear Centre (RFNC) is one of twelve CMS suppliers to receive awards for outstanding performance this year. The CMS Collaboration took the opportunity of the visit to CERN of the Director of VNIITF and his deputy to present the CMS Gold Award, which the institute has received for its exceptional performance in the assembly of steel plates for the CMS forward hadronic calorimeter. This calorimeter consists of two sets of 18 wedge-shaped modules arranged concentrically around the beam-pipe at each end of the CMS detector. Each module consists of steel absorber plates with quartz fibres inserted into them. The institute developed a special welding technique to assemble the absorber plates, enabling a high-quality detector to be produced at relatively low cost.RFNC-VNIITF Director Professor Georgy Rykovanov (right), is seen here receiving the Gold Award from Felicitas Pauss, Vice-Chairman of the CMS ...

  20. The CMS Tracker Detector Control System

    Energy Technology Data Exchange (ETDEWEB)

    Yousaf Shah, S. [University of California, Santa Barbara, CA (United States)], E-mail: yousaf.shah@cern.ch; Tsirou, Andromachi; Verdini, Piero Giorgio [CERN, Geneva (Switzerland); Hartmann, Frank [University of Karlsruhe, Karlsruhe (Germany); Masetti, Lorenzo [CERN, Geneva (Switzerland); Dirkes, Guido H. [University of Karlsruhe, Karlsruhe (Germany); Stringer, Robert [University of California, Riverside, CA (United States); Fahrer, Manuel [CERN, Geneva (Switzerland)

    2009-06-01

    The Compact Muon Solenoid DCS (CMS) Silicon Strip Tracker is by far the largest detector ever built in micro-strip technology. It has an active surface area of 198 m{sup 2} consisting of 15,148 silicon modules with 9,316,352 readout channels read via 75,376 Analog Pipeline Voltage (APV) front-end chips and a total of 24,244 sensors. The Detector Control System (DCS) for the Tracker is a distributed control system that operates {approx}2000 power supplies for the silicon modules and also monitors its environmental sensors. The DCS receives information from about 10{sup 3} environmental probes (temperature and humidity sensors) located inside the detector's volume and values from these probes are driven through the Programmable Logic Controllers (PLC) of the Detector Safety System (DSS). A total of 10{sup 5} parameters are read out from the dedicated chips in the front-end electronics of the detector via the data acquisition system, and a total of 10{sup 5} parameters are read from the power supply modules. All these parameters are monitored, evaluated and correlated with the detector layout; actions are taken under specific conditions. The hardware for DCS consists of 10 PCs and 10 PLC systems that are continuously running the necessary control and safety routines. The DCS is a fundamental tool for the Tracker operation and its safety.

  1. The CMS Tracker Detector Control System

    Science.gov (United States)

    Yousaf Shah, S.; Tsirou, Andromachi; Verdini, Piero Giorgio; Hartmann, Frank; Masetti, Lorenzo; Dirkes, Guido H.; Stringer, Robert; Fahrer, Manuel

    2009-06-01

    The Compact Muon Solenoid DCS (CMS) Silicon Strip Tracker is by far the largest detector ever built in micro-strip technology. It has an active surface area of 198 m 2 consisting of 15,148 silicon modules with 9,316,352 readout channels read via 75,376 Analog Pipeline Voltage (APV) front-end chips and a total of 24,244 sensors. The Detector Control System (DCS) for the Tracker is a distributed control system that operates ˜2000 power supplies for the silicon modules and also monitors its environmental sensors. The DCS receives information from about 10 3 environmental probes (temperature and humidity sensors) located inside the detector's volume and values from these probes are driven through the Programmable Logic Controllers (PLC) of the Detector Safety System (DSS). A total of 10 5 parameters are read out from the dedicated chips in the front-end electronics of the detector via the data acquisition system, and a total of 10 5 parameters are read from the power supply modules. All these parameters are monitored, evaluated and correlated with the detector layout; actions are taken under specific conditions. The hardware for DCS consists of 10 PCs and 10 PLC systems that are continuously running the necessary control and safety routines. The DCS is a fundamental tool for the Tracker operation and its safety.

  2. 33 CFR 334.150 - Severn River at Annapolis, Md.; experimental test area, U.S. Navy Marine Engineering Laboratory.

    Science.gov (United States)

    2010-07-01

    ... Marine Engineering Laboratory. (a) The restricted area. The waters of Severn River shoreward of a line... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Severn River at Annapolis, Md.; experimental test area, U.S. Navy Marine Engineering Laboratory. 334.150 Section 334.150 Navigation...

  3. CMS oversight, OPOs and transplant centers and the law of unintended consequences.

    Science.gov (United States)

    Howard, Richard J; Cornell, Danielle L; Schold, Jesse D

    2009-01-01

    The Health Resources and Services Administration launched collaboratives with the goals of increasing donation rates, increasing the number of organs transplanted, eliminating deaths on the waiting list and improving outcomes. The Center for Medicare and Medicaid Services (CMS) recently published requirements for organ procurement organizations (OPOs) and transplant centers. Failure to meet CMS performance measures could result in OPOs losing their service area or transplant centers losing their CMS certification. CMS uses analyses by the Scientific Registry of Transplant Recipients (SRTR) to evaluate a transplant center's performance based on risk-adjusted outcomes. However, CMS also uses a more liberal (one-sided) statistical test rendering more centers likely to qualify as low performing. Furthermore, the SRTR model does not incorporate some important patient variables in its statistical model which may result in biased determinations of quality of care. Cumulatively, there is much unexplained variation for transplant outcomes as suggested by the low predictive ability of survival models compared to other disease contexts. OPOs and transplant centers are unlikely to quietly accept their elimination. They may take certain steps that can result in exclusion of candidates who might otherwise benefit from transplantation and/or result in fewer transplants through restricted use of organs thought to carry higher risk of failure. CMS should join with transplant organizations to ensure that the goals of the collaborative are not inhibited by their performance measures.

  4. A methodology for evacuation design for urban areas: theoretical aspects and experimentation

    Science.gov (United States)

    Russo, F.; Vitetta, A.

    2009-04-01

    of models for evacuation simulation; (c) to calibrate and validate system of model for evacuation simulation from a real experimentation. In relation to the proposed objectives in this paper: (a) a general framework about risk analysis is reported in the first part, with specific methods and models to analyze urban transportation system performances in emergency conditions when exogenous phenomena occur and for the specification of the risk function; (b) a formulation of the general evacuation problem in the standard simulation context of "what if" approach is specified in the second part with reference to the model considered for the simulation of transportation system in ordinary condition; (c) a set of models specified in the second part are calibrated and validated from a real experimentation in the third part. The experimentation was developed in the central business district of an Italian village and about 1000 inhabitants were evacuated, in order to construct a complete data-base. Our experiment required that socioeconomic information (population, number employed, public buildings, schools, etc.) and ‎transport supply characteristics (infrastructures, etc.) be measured before and during experimentation. The real data of evacuation were recorded with 30 video cameras for laboratory analysis. The results are divided into six strictly connected tasks: Demand models; Supply and supply-demand interaction models for users; Simulation of refuge areas for users; Design of path choice models for emergency vehicles; Pedestrian outflow models in a building; Planning process and guidelines.

  5. The San Niccolo' experimental area for studying the hydrology of coastal Mediterranean peatlands

    Science.gov (United States)

    Rossetto, Rudy; Barbagli, Alessio; Sabbatini, Tiziana; Silvestri, Nicola; Bonari, Enrico

    2015-04-01

    Starting from 1930, a large part of the Massaciuccoli Lake coastal area (Tuscany, Italy) has been drained for agricultural purposes by a complex network of artificial drains and pumping stations. In the drained areas, peat soils, with values of organic matter up to 50% in some cases, are largely present (Pistocchi et al., 2012). As a consequence of the human impact, environmental problems arose in the last 50 years: i. the eutrophication status of the Massaciuccoli lake caused by nutrient enrichment (N, P) in surface- and ground-water (Rossetto et al., 2010a); ii. the subsidence (2-3 m in 70 years) of the lake bordering areas due to soil compaction and mineralization (Rossetto et al., 2010b). As a potential solution to improve water quality and to decrease soil organic matter mineralization, a rewetted pilot experimental area of 15 ha with phyto-treatment functionalities has been set up. This pilot, adequately instrumented, now constitutes an open field lab to conduct research on the hydrology of coastal Mediterranean peatlands. Site investigation was performed and data on stratigraphy (from top on average: 1/2 m thick peat layer, 1/3 m organic matter-rich silt, 1/3 m stiff blue-gray clay, up to 30 m thick sand layer) and water (ground- and surface-water) quantity and quality were gathered and related to both local and regional groundwater flows. The inferred hydrological conceptual model revealed the pilot is set in a regional discharge area and the ground-water dependent nature of the agro-ecosystem, with mixing of waters with different origins. The site has been divided in three different phyto-treatment systems: a constructed wetland system, internally and externally banked in order to force water flow to a convoluted pattern where Phragmites australis L. and Thypha angustifolia L. constitute the sparse natural vegetation; a vegetation filter system based on the plantation of seven different no-food crops managed according to a periodic cutting and biomass

  6. Searching for supersymmetry in compressed scenarios with the CMS experiment

    CERN Document Server

    Bainbridge, Robert

    2015-01-01

    Searches for supersymmetric models with a compressed mass spectrum are presented using data samples collected at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.4$-$19.7~$fb^{-1}$. This class of model is challenging to detect experimentally, primarily due to low-momentum SM particles arising from decay chains involving SUSY particles of comparable mass. Various searches that are optimised for models involving the production of coloured sparticles or electroweakinos and a compressed mass spectrum are presented.

  7. Experimental Study on the Microstructure Evolution of Mixed Disposal Paste in Surface Subsidence Areas

    Directory of Open Access Journals (Sweden)

    Wei Sun

    2016-05-01

    Full Text Available The integrated disposal of surface subsidence pits and surface solid waste can be realized by backfilling a surface subsidence area with a paste made from the solid wastes of mines, such as tailings and waste rock. The microstructures of these wastes determine the macroscopic properties of a paste backfill. This paper presents an experimental study on the internal structure evolution of pasty fluid mixed with different waste rock concentrations (10%, 30%, and 50% and cement dosages (1% and 2% under damage. To this end, a real-time computed tomography (CT scan is conducted using medical CT and a small loading device. Results show that UCS (uniaxial compressive strength increases when the amount of cement increases. Given a constant amount of cement, UCS increases first and then decreases as waste rock content increases. UCS is maximized at 551 kPa when the waste rock content is 30%. The paste body is a typical medium used to investigate initial damage, which mainly consists of microholes, pores, and microcracks. The initial damages also exhibit a high degree of random inhomogeneity. After loading, cracks are initiated and expand gradually from the original damage location until the overall damages are generated. The mesostructure evolution model of the paste body is divided into six categories, and this mesostructure is reasonable when the waste rock content is 30%.

  8. Water quality and quantity assessment of pervious pavements performance in experimental car park areas.

    Science.gov (United States)

    Sañudo-Fontaneda, Luis A; Charlesworth, Susanne M; Castro-Fresno, Daniel; Andres-Valeri, Valerio C A; Rodriguez-Hernandez, Jorge

    2014-01-01

    Pervious pavements have become one of the most used sustainable urban drainage system (SUDS) techniques in car parks. This research paper presents the results of monitoring water quality from several experimental car park areas designed and constructed in Spain with bays made of interlocking concrete block pavement, porous asphalt, polymer-modified porous concrete and reinforced grass with plastic and concrete cells. Moreover, two different sub-base materials were used (limestone aggregates and basic oxygen furnace slag). This study therefore encompasses the majority of the materials used as permeable surfaces and sub-base layers all over the world. Effluent from the test bays was monitored for dissolved oxygen, pH, electric conductivity, total suspended solids, turbidity and total petroleum hydrocarbons in order to analyze the behaviour shown by each combination of surface and sub-base materials. In addition, permeability tests were undertaken in all car parks using the 'Laboratorio Caminos Santander' permeameter and the Cantabrian Portable Infiltrometer. All results are presented together with the influence of surface and sub-base materials on water quality indicators using bivariate correlation statistical analysis at a confidence level of 95%. The polymer-modified porous concrete surface course in combination with limestone aggregate sub-base presented the best performance.

  9. Development and testing of a double length pets for the CLIC experimental area

    CERN Document Server

    Sánchez, L; Gavela, D; Lara, A; Rodríguez, E; Gutiérrez, J L; Calero, J; Toral, F; Samoshkin, A; Gudkov, D; Riddone, G

    2014-01-01

    CLIC (compact linear collider) is a future e þ e collider based on normal-conducting technology, currently under study at CERN. Its design is based on a novel two-beam acceleration scheme. The main beam gets RF power extracted from a drive beam through power extraction and transfer structures (PETS). The technical feasibility of CLIC is currently being proved by its Third Test Facility (CTF3) which includes the CLIC experimental area (CLEX). Two Double Length CLIC PETS will be installed in CLEX to validate their performance with beam. This paper is focused on the engineering design, fabrication and validation of this PETS fi rst prototype. The design consists of eight identical bars, separated by radial slots in which damping material is located to absorb transverse wake fi elds, and two compact couplers placed at both ends of the bars to extract the generated power. The PETS bars are housed inside a vacuum tank designed to make the PETS as compact as possible. Several joint techniques such as vacuum brazing...

  10. Septum magnet MNP-23 for the CERN PS experimental area and its fast interlock system

    CERN Document Server

    Borburgh, J; Prost, A; Zickler, T

    2004-01-01

    Two MNP-23 septum-like magnets are installed at CERN in the transfer line from the Proton Synchrotron (PS) to the East Hall Experimental Area. They are exposed to extremely high doses of ionizing radiation. In the past, the magnets experienced two catastrophic failures due to overheating of its coils and cannot be repaired. The magnets of improved design which is subject of this article are built as replacements for the magnets presently installed. The MNP-23 is a resistive C shaped iron-dominated magnet made of solid low carbon steel blocks. The excitation windings consist of two water-cooled coils wound from hollow copper conductor. The septum design of these magnets implies a high current density which requires an efficient water cooling system. The newly designed cooling circuit provides better cooling performance and more reliability. To avoid failures due to coil overheating, an elaborate interlock system was developed and installed. It consists of two parts: firstly a slow, more classic sensor, to dete...

  11. Development and testing of a double length pets for the CLIC experimental area

    Energy Technology Data Exchange (ETDEWEB)

    Sánchez, L., E-mail: laura.sanchez@ciemat.es [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Avda. Complutense 40, 28040 Madrid (Spain); Carrillo, D.; Gavela, D.; Lara, A.; Rodríguez, E.; Gutiérrez, J.L; Calero, J.; Toral, F. [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Avda. Complutense 40, 28040 Madrid (Spain); Samoshkin, A.; Gudkov, D.; Riddone, G. [European Organization for Nuclear Research (CERN), CH-1211, Geneva 23 (Switzerland)

    2014-05-11

    CLIC (compact linear collider) is a future e+e{sup −} collider based on normal-conducting technology, currently under study at CERN. Its design is based on a novel two-beam acceleration scheme. The main beam gets RF power extracted from a drive beam through power extraction and transfer structures (PETS). The technical feasibility of CLIC is currently being proved by its Third Test Facility (CTF3) which includes the CLIC experimental area (CLEX). Two Double Length CLIC PETS will be installed in CLEX to validate their performance with beam. This paper is focused on the engineering design, fabrication and validation of this PETS first prototype. The design consists of eight identical bars, separated by radial slots in which damping material is located to absorb transverse wakefields, and two compact couplers placed at both ends of the bars to extract the generated power. The PETS bars are housed inside a vacuum tank designed to make the PETS as compact as possible. Several joint techniques such as vacuum brazing, electron beam and arc welding were used to complete the assembly. Finally, several tests such as dimensional control and leak testing were carried out to validate design and fabrication methods. In addition, RF measurements at low power were made to study frequency tuning.

  12. Experimental Study on Interfacial Area Transport of Two-Phase Flow under Vibration Conditions

    Directory of Open Access Journals (Sweden)

    Xiu Xiao

    2017-01-01

    Full Text Available An experimental study on air-water two-phase flow under vibration condition has been conducted using double-sensor conductivity probe. The test section is an annular geometry with hydraulic diameter of 19.1 mm. The vibration frequency ranges from 0.47 Hz to 2.47 Hz. Local measurements of void fraction, interfacial area concentration (IAC, and Sauter mean diameter have been performed along one radius in the vibration direction. The result shows that local parameters fluctuate continuously around the base values in the vibration cycle. Additional bubble force due to inertia is used to explain lateral bubble motions. The fluctuation amplitudes of local void fraction and IAC increase significantly with vibration frequency. The radial distribution of local parameters at the maximum vibration displacement is specifically analyzed. In the void fraction and IAC profiles, the peak near the inner wall is weakened or even disappearing and a strong peak skewed to outer wall is gradually observed with the increase of vibration frequency. The nondimensional peak void fraction can reach a maximum of 49% and the mean relative variation of local void fraction can increase to more than 29% as the vibration frequency increases to 2.47 Hz. But the increase of vibration frequency does not bring significant change to bubble diameter.

  13. A new spark detection system for the electrostatic septa of the SPS North (experimental) Area

    CERN Document Server

    Barlow, R A; Borburgh, J; Carlier, E; Chanavat, C; Fowler, T; Pinget, B

    2014-01-01

    Electrostatic septa (ZS) are used in the extraction of the particle beams from the CERN SPS to the North Area experimental zone. These septa employ high electric fields, generated from a 300 kV power supply, and are particularly prone to internal sparking around the cathode structure. This sparking degrades the electric field quality, consequently affecting the extracted beam, vacuum and equipment performance. To mitigate these effects, a Spark Detection System (SDS) has been realised, which is based on an industrial SIEMENS S7-400 programmable logic controller and deported Boolean processor modules interfaced through a PROFINET fieldbus. The SDS interlock logic uses a moving average spark rate count to determine if the ZS performance is acceptable. Below a certain spark rate it is probable that the ZS septa tank vacuum can recover, thus avoiding transition into a state where rapid degradation would occur. Above this level an interlock is raised and the high voltage is switched off. Additionally, all spark si...

  14. Experimental and Numerical Investigation of Wide Area Blunt Impact Damage to Composite Aircraft Structures

    Science.gov (United States)

    Chen, Zhi Ming

    Due to their high performance and weight efficiency, carbon fiber composites are increasingly being used in aircraft primary structure applications. Exposed composite structures (e.g., fuselage lower body) are susceptible accidental impacts by ground service equipment (GSE). The very high mass (over 10,000 kg) of GSE impact can involve high energy (over 1000 J) and thus can induce significant internal damage. Furthermore, the large contact area potentially involved with GSE impact can create significant internal delamination and fiber failure without leaving exterior-visible signs that any damage has occurred. The objectives of the research described herein are to: (1) conduct experimental investigation into the composite aircraft damage caused by GSE impact, (2) examine the small-scale failure modes in focused, element-level studies, (3) establish a finite element modeling methodology involving detailed simulation capability that is validated via small-scale tests, and (4) apply these modeling capabilities to accurately predict full-scale structural behavior without adjustment (e.g., tuning) of modeling input parameters.

  15. Vast Area Detection for Experimental Radiochemistry (VADER) at the National Ignition Facility

    Science.gov (United States)

    Galbraith, Justin; Bettencourt, Ron; Shaughnessy, Dawn; Gharibyan, Narek; Talison, Bahram; Morris, Kevin; Smith, Cal

    2015-08-01

    At the National Ignition Facility (NIF), the flux of neutrons and charged particles at peak burn in an inertial confinement fusion capsule induces measureable concentrations of nuclear reaction products in the target material. Radiochemical analysis of post-shot debris can be used to determine diagnostic parameters associated with implosion of the capsule, including fuel areal density and ablator-fuel mixing. Additionally, analysis of debris from specially doped targets can support nuclear forensic research. We have developed and are deploying the Vast Area Detection for Experimental Radiochemistry (VADER) diagnostic to collect shot debris and interact with post-shot reaction products at the NIF. VADER uses quick release collectors that are easily reconfigured for different materials and geometries. Collectors are located ~50 cm from the NIF target; each of up to 9 collectors views ~0.005-0.0125 steradians solid angle, dependent upon configuration. Dynamic loading of the NIF target vaporized mass was modelled using LS-DYNA. 3-dimensional printing was utilized to expedite the design process. Model-based manufacturing was used throughout. We will describe the design and operation of this diagnostic as well as some initial results.

  16. LHC collision event at CMS showing two high energy photons (CMS Higgs search)

    CERN Multimedia

    CMS Collaboration

    2011-01-01

    11sec animation of a Higgs->GammaGamma candidate in CMS. Real CMS proton-proton collision events in which two high energy photons (dashed orange lines and towers) are observed. The event shows characteristics expected from the decay of a Higgs boson but is also consistent with background Standard Model physics processes.

  17. LHC collision event at CMS showing four high energy electrons (CMS Higgs search)

    CERN Multimedia

    CMS Collaboration

    2011-01-01

    11sec animation of a Higgs->ZZ->4e candidate in CMS. Real CMS proton-proton collision events in which 4 high energy electrons (orange lines and towers) are observed. The event shows characteristics expected from the decay of a Higgs boson but is also consistent with background Standard Model physics processes.

  18. CMS Young Researchers Award 2013 and Fundamental Physics Scholars Award from the CMS Experiment

    CERN Multimedia

    Lapka, Marzena

    2014-01-01

    Photo 2: CMS Fundamental Physics Scholars (FPSs) 1st prize: Joosep Pata, from Estonian National Institue of Chemical Physics and Biophysics / Photo 1 and 3: CMS Young Researchers Award. From left to right: Guido Tonelli, Colin Bernet, Andre David, Oliver Gutsche, Dmytro Kovalskyi, Andrea Petrucci, Joe Incandela and Jim Virdee

  19. LHC collision event at CMS showing four high energy muons (CMS Higgs search)

    CERN Multimedia

    CMS Collaboration

    2011-01-01

    11sec animation of a Higgs->ZZ->4mu candidate being created CMS . Real CMS proton-proton collision events in which 4 high energy muons (light blue lines) are observed. The event shows characteristics expected from the decay of a Higgs boson but is also consistent with background Standard Model physics processes.

  20. Study of the inclusive beauty production at CMS and construction and commissioning of the CMS pixel barrel detector

    Energy Technology Data Exchange (ETDEWEB)

    Caminada, Lea

    2012-07-01

    This thesis describes one of the first measurements made at CERN's Large Hadron Collider, the world's largest and highest-energy particle collider. The method of analysis described in the first part is applied to the first CMS collision data collected after the LHC startup in 2010 and leads to the first experimental result for the inclusive b cross section using semileptonic decays at a center of mass energy of 7 TeV. The second part of the thesis describes the building and testing of the barrel pixel detector; the author herself played an important role in its construction, commissioning and first exploitation.

  1. Parametric experimental studies on mixing characteristics within a low area ratio rectangular supersonic gaseous ejector

    Science.gov (United States)

    Karthick, S. K.; Rao, Srisha M. V.; Jagadeesh, G.; Reddy, K. P. J.

    2016-07-01

    We use the rectangular gaseous supersonic ejector as a platform to study the mixing characteristics of a confined supersonic jet. The entrainment ratio (ER) of the ejector, the non-mixed length (LNM), and potential core length (LPC) of the primary supersonic jet are measures to characterize mixing within the supersonic ejector. Experiments are carried out on a low area ratio rectangular supersonic ejector with air as the working fluid in both primary and secondary flows. The design Mach number of the nozzle (MPD = 1.5-3.0) and primary flow stagnation pressure (Pop = 4.89-9.89 bars) are the parameters that are varied during experimentation. Wall static pressure measurements are carried out to understand the performance of the ejector as well as to estimate the LNM (the spatial resolution is limited by the placement of pressure transducers). Well-resolved flow images (with a spatial resolution of 50 μm/pixel and temporal resolution of 1.25 ms) obtained through Planar Laser Mie Scattering (PLMS) show the flow dynamics within the ejector with clarity. The primary flow and secondary flow are seeded separately with acetone that makes the LNM and LPC clearly visible in the flow images. These parameters are extracted from the flow images using in-house image processing routines. A significant development in this work is the definition of new scaling parameters within the ejector. LNM, non-dimensionalized with respect to the fully expanded jet height hJ, is found to be a linear function of the Mach number ratio (Mach number ratio is defined as the ratio of design Mach number (MPD) and fully expanded Mach number (MPJ) of the primary jet). This definition also provides a clear demarcation of under-expanded and over-expanded regimes of operation according to [MPD/MPJ] > 1 and [MPD/MPJ] < 1, respectively. It is observed that the ER increased in over-expanded mode (to 120%) and decreased in under-expanded mode (to 68%). Similarly, LNM decreased (to 21.8%) in over-expanded mode

  2. Installation of CMS EB (ECAL Barrel) Supermodules 5 and 13 inside HB+ (HCAL Barrel) on 26/27 April 2006

    CERN Multimedia

    2006-01-01

    The first two barrel "supermodules" of the CMS Electromagnetic Calorimeter (ECAL) have been inserted into the barrel hadron calorimeter (HCAL) in the CMS experimental hall (called SX5) in Cessy in preparation for the forthcoming magnet test and cosmic challenge (MTCC). Each of the two supermodules contains 1700 lead tungstate crystals in glass-fibre alveolar support structures, with associated avalanche photodiodes (APDs, for scintillation light detection), electronics and cooling system.

  3. The CMS Beam Halo Monitor Electronics

    CERN Document Server

    AUTHOR|(CDS)2080684; Fabbri, F.; Grassi, T.; Hughes, E.; Mans, J.; Montanari, A.; Orfanelli, S.; Rusack, R.; Torromeo, G.; Stickland, D.P.; Stifter, K.

    2016-01-01

    The CMS Beam Halo Monitor has been successfully installed in the CMS cavern in LHC Long Shutdown 1 for measuring the machine induced background for LHC Run II. The system is based on 40 detector units composed of synthetic quartz Cherenkov radiators coupled to fast photomultiplier tubes. The readout electronics chain uses many components developed for the Phase 1 upgrade to the CMS Hadronic Calorimeter electronics, with dedicated firmware and readout adapted to the beam monitoring requirements. The PMT signal is digitized by a charge integrating ASIC (QIE10), providing both the signal rise time, with few ns resolution, and the charge integrated over one bunch crossing. The backend electronics uses microTCA technology and receives data via a high-speed 5 Gbps asynchronous link. It records histograms with sub-bunch crossing timing resolution and is readout by IPbus using the newly designed CMS data acquisition for non-event based data. The data is processed in real time and published to CMS and the LHC, providi...

  4. CMS outreach event to close LS1

    CERN Multimedia

    Achintya Rao

    2015-01-01

    CMS opened its doors to about 700 students from schools near CERN, who visited the detector on 16 and 17 February during the last major CMS outreach event of LS1.   Pellentesque sapien mi, pharetra vitae, auctor eu, congue sed, turpis. Enthusiastic CMS guides spent a day and a half showing the equally enthusiastic visitors, aged 10 to 18, the beauty of CMS and particle physics. The recently installed wheelchair lift was called into action and enabled a visitor who arrived on crutches to access the detector cavern unimpeded.  The CMS collaboration had previously devoted a day to school visits after the successful “Neighbourhood Days” in May 2014 and, encouraged by the turnout, decided to extend an invitation to local schools once again. The complement of nearly 40 guides and crowd marshals was aided by a support team that coordinated the transportation of the young guests and received them at Point 5, where a dedicated safety team including first-aiders, security...

  5. OPTIMASI WEBSITE BERBASIS CMS PADA GOOGLE PEGESPEED

    Directory of Open Access Journals (Sweden)

    Rizki Muliono

    2016-08-01

    Full Text Available Abstrak—Saat ini banyak web berkembang di dunia maya dengan berbagai nama domain dan platform script yang membangunnya, baik itu dibangun  secara manual koding dan menggunakan CMS (content management system dengan berbagai bahasa pemrograman web seperti php, asp, phyton, jsp, java script dan bahasa pemrograman web lainnya. Melihat kebutuhan dan waktu yang di perlukaan saat sekarang ini pengguna web lebih dijadikan patokan sebagai dasar survei dalam menilai baik dan buruknya website ketika diakses desain dan tampilan yang disajikan serta yang lebih utama adalah kecepatan dan  responsibility website tersebut ketika diakses oleh user, sehingga  pengembang web sendiri harus di dalam memilih platform pembentuk situs nya baik desain scripting dan management data. Salah satunya adalah wordpress sebagai frame CMS yang memudahkan bagi pengguna untuk membangun website atau situs dengan cepat dan mudah, namun semakin berkembangnya data dan semakin update wordpress yang di gunakan maka ada beberapa hal yang perlu di perhatikan salah satunya kecepatan akses dan render html pada situs yang menggunakan platform CMS Wordpress maka di butuhkan optimasi dalam memecahkan permasalahan umum yang sering terjadi pada CMS Wordpress tersebut. Pada jurnal ini wordpress di optimasi dengan menggunakan plugin yang membantu kecepatan akses dan render pada website berbasis CMS Wordpress diatanranya Leverage Browser Caching, JS & CSS Script Optimizer, Above The Fold, Plugin Chace hasil yang didapatkan adalah ujicoba testpage pada google page-speed mendapatkan peningkatan point yang jauh lebih baik dan kecepatan akses bertambah. Keywords— Wordpress Optimasi, Page-Speed, Website

  6. Experimentally Measured Interfacial Area during Gas Injection into Saturated Porous Media: An Air Sparging Analogy

    Energy Technology Data Exchange (ETDEWEB)

    Crandall, Dustin; Ahmadi, Goodarz; Smith, Duane H., Bromhal, Grant

    2010-01-01

    The amount of interfacial area (awn) between air and subsurface liquids during air-sparging can limit the rate of site remediation. Lateral movement within porous media could be encountered during air-sparging operations when air moves along the bottom of a low-permeability lens. This study was conducted to directly measure the amount of awn between air and water flowing within a bench-scale porous flow cell during the lateral movement of air along the upper edge of the cell during air injections into an initially water-saturated flow cell. Four different cell orientations were used to evaluate the effect of air injection rates and porous media geometries on the amount of awn between fluids. Air was injected at flow rates that varied by three orders of magnitude, and for each flow cellover this range of injection rates little change in awn was noted. A wider variation in awn was observed when air moved through different regions for the different flow cell orientations. These results are in good agreement with the experimental findings of Waduge et al. (2007), who performed experiments in a larger sand-pack flow cell, and determined that air-sparging efficiency is nearly independent of flow rate but highly dependent on the porous structure. By directly measuring the awn, and showing that awn does not vary greatly with changes in injection rate, we show that the lack of improvement to remediation rates is because there is a weak dependence of the awn on the air injection rate.

  7. Experimental reintroduction of the crayfish species Orconectes virilis into formerly acidified Lake 302S, Experimental Lakes Area, Canada

    Energy Technology Data Exchange (ETDEWEB)

    Phillips, I.D. [Saskatchewan Watershed Authority, Saskatoon, SK (Canada); Alberta Univ., Edmonton, AB (Canada). Dept. of Biological Sciences; Vinebrooke, R.D. [Alberta Univ., Edmonton, AB (Canada). Dept. of Biological Sciences; Turner, M.A. [Fisheries and Oceans Canada, Winnipeg, MB (Canada). Freshwater Inst.

    2009-11-15

    The sudden reappearance of extirpated species in damaged ecosystems may have adverse ecological impacts. This study reintroduced crayfish (Orconectes virilis) into a formerly acidified Boreal shield lake located in Ontario in order to evaluate the effect of the species on the littoral food web after a 17 year absence. A single factor experimental design consisting of 2 treatment levels was replicated 5 times in order to form a total of 10 littoral cages each measuring 4 m{sup 2}. The study showed that the crayfish significantly suppressed the total biomass of other benthic invertebrates by 70 per cent as a result of declines in larval damselflies and midges. Periphytic biomass was reduced by 90 per cent. Isotopic analyses of the mesocosm food webs demonstrated that the crayfish functioned as an omnivore. The study demonstrated that the re-introduction of crayfish must be balanced with adequate fish predation in order to prevent the species from negatively impacting the productive capacity of Boreal lakes. 67 refs., 2 tabs., 8 figs.

  8. The Detector Control Systems for the CMS Resistive Plate Chamber

    CERN Document Server

    Paolucci, P; Gómez-Reino, R; Viviani, C; Shahzad, R; Khurshid, T

    2010-01-01

    The Resistive Plate Chamber system is composed by 912 double-gap chambers equipped with about $10^4$ front-end boards. The correct and safe operation of the RPC system requires a sophisticated and complex online Detector Control System, able to monitor and control 2$\\cdot10^4$ hardware devices distributed on an area of about 5000 m$^2$. The RPC DCS acquires, monitors and stores about $10^5$ parameters coming from the detector, the electronics, the power system, the gas, and cooling systems. The DCS system and the first results, obtained during the 2007 and 2008 CMS cosmic runs, will be described in this paper.

  9. V3 CMS tracker layout Detector Break-up

    CERN Document Server

    Caner, Alessandra

    1996-01-01

    This note reports on the detector and channel break-up of the CMS V3 tracker layout. A compilation of alternative layouts is also tabulated to allow for cost estimates as a function of layout configurations. The information is organized in a modular fashion: for each configuration, the break-up of 25 cm ( 'one wheel') of barrel is reported. The forward detectors ( 'disks') are described individually as a function of equipped annuli. The total number of channels, the area and the bare cost of the provisional V3 layout are estimated. This note will be updated as the V3 layout evolves.

  10. Study of gas purifiers for the CMS RPC detector

    CERN Document Server

    Benussi, L; Colafranceschi, S; Fabbri, F L; Felli, F; Ferrini, M; Giardoni, M; Greci, T; Paolozzi, A; Passamonti, L; Piccolo, D; Pierluigi, D; Russo, A; Saviano, G; Buontempo, S; Cimmino, A; de Gruttola, M; Fabozzi, F; Iorio, A O M; Lista, L; Paolucci, P; Baesso, P; Belli, G; Pagano, D; Ratti, S P; Vicini, A; Vitulo, P; Viviani, C; Guida, R; Sharma, A

    2012-01-01

    The CMS RPC muon detector utilizes a gas recirculation system called closed loop (CL) to cope with large gas mixture volumes and costs. A systematic study of CL gas purifiers has been carried out over 400 days between July 2008 and August 2009 at CERN in a low-radiation test area, with the use of RPC chambers with currents monitoring, and gas analysis sampling points. The study aimed to fully clarify the presence of pollutants, the chemistry of purifiers used in the CL, and the regeneration procedure. Preliminary results on contaminants release and purifier characterization are reported.

  11. Groot (WES) (CMS 23) and Sout (CMS 22)

    CSIR Research Space (South Africa)

    Morant, PD

    1983-06-01

    Full Text Available Little is known of the early history of the area surrounding the Groot and Sout estuaries. The densely forested terrain dissected by deep gorges caused the area to be avoided by early travellers who used the inland route via the Langkloof to Algoa...

  12. B-Hadron Lifetime Measurements from CMS, D0 and LHCb

    CERN Document Server

    Eklund, L

    2012-01-01

    Lifetime measurements of b-flavoured hadrons can be used to test QCD predictions and to probe for CP violation in mixing and decay. This paper outlines a few of the experimental methods used to correct for the decay time bias introduced by the event selection and summarises recent measurements from the CMS, D0 and LHCb Experiments

  13. CMS Grid Activities in the United States

    Institute of Scientific and Technical Information of China (English)

    I.Fisk; J.Amundson; 等

    2001-01-01

    The CMS groups in the USA are actively involved in several grid-elated projects,including the DoE-funded Particle Physics Data Grid(PPDG)and the NSFfunded Grid Physics Network(GriPhyN).We present developments of :the Grid data Management Pilot (GDMP) software;a Java Analysis Studio-based prototype remote analysis service for CMS data;tools for automating job submission schemes for large scale distributed simulation and reconstruction runs for CMS;modeling and development of job scheduling schemes using the MONARC toolkit;a robust execution service for distributed processors.The deployment and use of these tools at prototype Tier1 and Tier2 computing centers in the USA is described.

  14. CMS standard model Higgs boson results

    Directory of Open Access Journals (Sweden)

    Garcia-Abia Pablo

    2013-11-01

    Full Text Available In July 2012 CMS announced the discovery of a new boson with properties resembling those of the long-sought Higgs boson. The analysis of the proton-proton collision data recorded by the CMS detector at the LHC, corresponding to integrated luminosities of 5.1 fb−1 at √s = 7 TeV and 19.6 fb−1 at √s = 8 TeV, confirm the Higgs-like nature of the new boson, with a signal strength associated with vector bosons and fermions consistent with the expectations for a standard model (SM Higgs boson, and spin-parity clearly favouring the scalar nature of the new boson. In this note I review the updated results of the CMS experiment.

  15. CMS live #WhatsUpLHC

    CERN Multimedia

    CERN video productions; Paolo Catapano

    2017-01-01

    CMS live from Facebook. The Pixel Tracker (or Pixel Detector) is the innermost instrument in the very heart of the CMS apparatus, installed around the LHC beampipe. This is the very point where new particles, such as the Higgs boson, are produced by the energy of the proton proton collisions, and so the Pixel detector receives the largest particle-flux of any sub-component of CMS. The new component is made up of two “parts”: a central barrel region (called BPIX), made of two cylindrical halves, and forward discs on either side of the collision point (FPIX). The new BPIX was manufactured by a consortium of European institutes from Switzerland, Italy and Germany, supported by CERN. The new FPIX was manufactured by 14 institutes in the USA.

  16. Success in the pipeline for CMS

    CERN Multimedia

    2008-01-01

    The very heart of any LHC experiment is not a pixel detector, nor a vertex locator but a beam pipe. It is the site of each collision and the boundary where the accelerator and experiment meet. As an element of complex design and manufacture the CMS beam pipe was fifteen years in the making and finally fully installed on Tuesday 10 June. Watch the video! End cap beam pipe installation in the CMS detector. Central beam pipe installation.The compensation modules were the final pieces to take their places in the cavern at Point 5: "These are like bellows," says Wolfram Zeuner, Deputy Technical Co-ordinator for CMS. "They allow us to compensate for the change in length when we heat or cool the beam pipe. And they are the very last elements; beam pipe installation, which began last year, is now complete." The beam pipe is neither too fragile nor too bulky, but just right to satisfy the conflicting n...

  17. Implication of CMS data on photon PDFs

    CERN Document Server

    Ababekri, Mamut; Isaacson, Joshua; Schmidt, Carl; Yuan, C -P

    2016-01-01

    Through the use of the CMS measurement of $W$-pair production via photon fusion, constraints on the photon parton distribution function are able to be placed on those from the CTEQ, MRST, and NNPDF collaborations. Furthermore, this data is able to rule out one of the MRST parton distribution sets, and the central prediction from NNPDF. After the announcement of the diphoton excess seen by both ATLAS and CMS, there was a proposal that this excess could be explained by a scalar produced via photon fusion. With the new constraints from the CMS data, the relationship between the total width and the branching ratio for such an object is updated to reflect the newly allowed region.

  18. CMS Forward-Backward MSGC milestone

    CERN Document Server

    Bouhali, O; Barthe, S; Beaumont, W; Beckers, T; Beissel, F; Benhammou, Ya; Bergdolt, A M; Bernier, K; Boulogne, I; Bozzo, M; Brom, J M; Camps, C; Chorowicz, V; Coffin, J; Commichau, V; Contardo, D; Croix, J; De Troy, J G; Drouhin, F; Eberle, H; Flügge, G; Fontaine, J C; Geist, Walter M; Goerlach, U; Gundlfinger, K; Hangarter, K; Haroutunian, R; Helleboid, J M; Hoffer, M; Hoffmann, C; Huss, D; Ischebeck, R; Jeanneau, F; Juillot, P; Kapp, M R; Krauth, M; Kremp, J; Lounis, A; Lübelsmeyer, K; Maazouzi, C; Macke, D; Mirabito, L; Nowack, A; Pandoulas, D; Petertill, M; Pooth, O; Racca, C; Ripp, I; Schmitz, P; Schulte, R; Schultz von Dratzig, A; Schunck, J P; Schuster, G; Schwaller, B; Sigward, M H; Smadja, G; Stefanescu, J; Tissot, S; Todorov, T; Udo, Fred; Van Doninck, W K; Van Dyck, C; Van Lancker, L; Van der Velde, C; Vanlaer, P; Verdini, P G; Wortmann, R; Zghiche, A; Zhukov, V

    1998-01-01

    The CMS MF1 milestone was set in order to evaluate system aspects of the CMS forward-backward MSGC tracker, to check the design and feasibility of mass production and to set up assembly and test procedures. We describe the construction and the experience gained with the operation of a system of 38 MSGC detectors assembled in six multi-substrate detector modules corresponding to the geometry of the forward-backward MSGC tracker in CMS. These modules were equipped with MSGCs mounted side by side, forming a continuous detector surface of about 0.2 m2. Different designs were tried for these modules. The problems encountered are presented with the proposed solutions. Operation conditions for the 38 MSGCs are reported from an exposure to a muon beam at the CERN SPS. Gain uniformity along the wedge-shaped strip pattern and across the detector modules are shown together with the detection efficiency, the spatial resolution, alignment and edge studies.

  19. Interactive Slice of the CMS detector

    CERN Multimedia

    Davis, Siona Ruth

    2016-01-01

    This slice shows a colorful cross-section of the CMS detector with all parts of the detector labelled. Viewers are invited to click on buttons associated with five types of particles to see what happens when each type interacts with the sections of the detector. The five types of particles users can select to send through the slice are muons, electrons, neutral hadrons, charged hadrons and photons. Supplementary information on each type of particles is given. Useful for inclusion into general talks on CMS etc. *Animated CMS "slice" for Powerpoint (Mac & PC) Original version - 2004 Updated version - July 2010 *Six slides required - first is a set of buttons; others are for each particle type (muon, electron, charged/neutral hadron, photon) Recommend putting slide 1 anywhere in your presentation and the rest at the end

  20. CMS Forward-Backward MSGC milestone

    CERN Document Server

    Bouhali, O; Barthe, S; Beaumont, W; Beckers, T; Beissel, F; Benhammou, Ya; Bergdolt, A M; Bernier, K; Boulogne, I; Bozzo, M; Brom, J M; Camps, C; Chorowicz, V; Coffin, J; Commichau, V; Contardo, D; Croix, J; De Troy, J G; Drouhin, F; Eberle, H; Flügge, G; Fontaine, J C; Geist, Walter M; Goerlach, U; Gundlfinger, K; Hangarter, K; Haroutunian, R; Helleboid, J M; Hoffer, M; Hoffmann, C; Huss, D; Ischebeck, R; Jeanneau, F; Juillot, P; Kapp, M R; Krauth, M; Kremp, J; Lounis, A; Lübelsmeyer, K; Maazouzi, C; Macke, D; Mirabito, L; Nowack, A; Pandoulas, D; Petertill, M; Pooth, O; Racca, C; Ripp, I; Schmitz, P; Schulte, R; Schultz von Dratzig, A; Schunck, J P; Schuster, G; Schwaller, B; Sigward, M H; Smadja, G; Stefanescu, J; Tissot, S; Todorov, T; Udo, Fred; Van Doninck, W K; Van Dyck, C; Van Lancker, L; Van der Velde, C; Vanlaer, P; Verdini, P G; Wortmann, R; Zghiche, A; Zhukov, V

    1998-01-01

    The CMS MF1 milestone was set in order to evaluate system aspects of the CMS forward-backward MSGC tracker, to check the design and feasibility of mass production and to set up assembly and test procedures. We describe the construction and the experience gained with the operation of a system of 38 MSGC detectors assembled in six multi-substrate detector modules corresponding to the geometry of the forward-backward MSGC tracker in CMS. These modules were equipped with MSGCs mounted side by side, forming a continuous detector surface of about 0.2 m2. Different designs were tried for these modules. The problems encountered are presented with the proposed solutions. Operation conditions for the 38 MSGCs are reported from an exposure to a muon beam at the CERN SPS. Gain uniformity along the wedge-shaped strip pattern and across the detector modules are shown together with the detection efficiency, the spatial resolution, alignment and edge studies.

  1. Remote Operations for LHC and CMS

    Energy Technology Data Exchange (ETDEWEB)

    Gottschalk, E.E.; /Fermilab

    2007-04-01

    Commissioning the Large Hadron Collider (LHC) and its experiments will be a vital part of the worldwide high energy physics program beginning in 2007. A remote operations center has been built at Fermilab to contribute to commissioning and operations of the LHC and the Compact Muon Solenoid (CMS) experiment, and to develop new capabilities for real-time data analysis and monitoring for LHC, CMS, and grid computing. Remote operations will also be essential to a future International Linear Collider with its multiple, internationally distributed control rooms. In this paper we present an overview of Fermilab's LHC@FNAL remote operations center for LHC and CMS, describe what led up to the development of the center, and describe noteworthy features of the center.

  2. The CMS all silicon Tracker simulation

    CERN Document Server

    Biasini, Maurizio

    2009-01-01

    The Compact Muon Solenoid (CMS) tracker detector is the world's largest silicon detector with about 201 m$^2$ of silicon strips detectors and 1 m$^2$ of silicon pixel detectors. It contains 66 millions pixels and 10 million individual sensing strips. The quality of the physics analysis is highly correlated with the precision of the Tracker detector simulation which is written on top of the GEANT4 and the CMS object-oriented framework. The hit position resolution in the Tracker detector depends on the ability to correctly model the CMS tracker geometry, the signal digitization and Lorentz drift, the calibration and inefficiency. In order to ensure high performance in track and vertex reconstruction, an accurate knowledge of the material budget is therefore necessary since the passive materials, involved in the readout, cooling or power systems, will create unwanted effects during the particle detection, such as multiple scattering, electron bremsstrahlung and photon conversion. In this paper, we present the CM...

  3. Track reconstruction in CMS high luminosity environment

    CERN Document Server

    Sguazzoni, Giacomo

    2014-01-01

    The CMS tracker is the largest silicon detector ever built, covering 200 square meters and providing an average of 14 high-precision measurements per track. Tracking is essential for the reconstruction of objects like jets, muons, electrons and tau leptons starting from the raw data from the silicon pixel and strip detectors. Track reconstruction is widely used also at trigger level as it improves objects tagging and resolution.The CMS tracking code is organized in several levels, known as iterative steps, each optimized to reconstruct a class of particle trajectories, as the ones of particles originating from the primary vertex or displaced tracks from particles resulting from secondary vertices. Each iterative step consists of seeding, pattern recognition and fitting by a kalman filter, and a final filtering and cleaning. Each subsequent step works on hits not yet associated to a reconstructed particle trajectory.The CMS tracking code is continuously evolving to make the reconstruction computing load compat...

  4. The CMS Timing Control and Distribution System

    CERN Document Server

    AUTHOR|(CDS)2075794; Andre, Jean-marc Olivier; Behrens, Ulf; Branson, James; Chaze, Olivier; Cittolin, Sergio; Darlea, Georgiana Lavinia; Deldicque, Christian; Demiragli, Zeynep; Dobson, Marc; Erhan, Samim; Fulcher, Jonathan Richard; Gigi, Dominique; Glege, Frank; Gomez Ceballos, Guillelmo; Hansen, Magnus; Holzner, Andre Georg; Jimenez Estupinan, Raul; Masetti, Lorenzo; Meijers, Franciscus; Meschi, Emilio; Mommsen, Remigius; Morovic, Srecko; O'Dell, Vivian; Orsini, Luciano; Paus, Christoph Maria Ernst; Pieri, Marco; Racz, Attila; Sakulin, Hannes; Schwick, Christoph; Simelevicius, Dainius; Troska, Jan; Vichoudis, Paschalis; Zejdl, Petr

    2016-01-01

    The Compact Muon Solenoid (CMS) experiment operating at the CERN (European Laboratory for Nuclear Physics) Large Hadron Collider (LHC) is in the process of upgrading several of its detector systems. Adding more individual detector components brings the need to test and commission those components separately from existing ones so as not to compromise physics data-taking. The CMS Trigger, Timing and Control (TTC) system had reached its limits in terms of the number of separate elements (partitions) that could be supported. A new Timing and Control Distribution System (TCDS) has been designed, built and commissioned in order to overcome this limit. It also brings additional functionality to facilitate parallel commissioning of new detector elements. We describe the new TCDS system and its components and show results from the first operational experience with the TCDS system in CMS.

  5. Commissioning of the CMS Experiment and the Cosmic Run at Four Tesla

    CERN Document Server

    INSPIRE-00165402; Khachatryan, V; Sirunyan, A M; Adam, W; Arnold, B; Bergauer, H; Bergauer, T; Dragicevic, M; Eichberger, M; Erö, J; Friedl, M; Frühwirth, R; Ghete, V M; Hammer, J; Hänsel, S; Hoch, M; Hörmann, N; Hrubec, J; Jeitler, M; Kasieczka, G; Kastner, K; Krammer, M; Liko, D; Magrans de Abril, I; Mikulec, I; Mittermayr, F; Neuherz, B; Oberegger, M; Padrta, M; Pernicka, M; Rohringer, H; Schmid, S; Schöfbeck, R; Schreiner, T; Stark, R; Steininger, H; Strauss, J; Taurok, A; Teischinger, F; Themel, T; Uhl, D; Wagner, P; Waltenberger, W; Walzel, G; Widl, E; Wulz, C E; Chekhovsky, V; Dvornikov, O; Emeliantchik, I; Litomin, A; Makarenko, V; Marfin, I; Mossolov, V; Shumeiko, N; Solin, A; Stefanovitch, R; Suarez Gonzalez, J; Tikhonov, A; Fedorov, A; Karneyeu, A; Korzhik, M; Panov, V; Zuyeuski, R; Kuchinsky, P; Beaumont, W; Benucci, L; Cardaci, M; De Wolf, E A; Delmeire, E; Druzhkin, D; Hashemi, M; Janssen, X; Maes, T; Mucibello, L; Ochesanu, S; Rougny, R; Selvaggi, M; Van Haevermaet, H; Van Mechelen, P; Van Remortel, N; Adler, V; Beauceron, S; Blyweert, S; D'Hondt, J; De Weirdt, S; Devroede, O; Heyninck, J; Kalogeropoulos, A; Maes, J; Maes, M; Mozer, M U; Tavernier, S; Van Doninck, W; Van Mulders, P; Villella, I; Bouhali, O; Chabert, E C; Charaf, O; Clerbaux, B; De Lentdecker, G; Dero, V; Elgammal, S; Gay, A P R; Hammad, G H; Marage, P E; Rugovac, S; Vander Velde, C; Vanlaer, P; Wickens, J; Grunewald, M; Klein, B; Marinov, A; Ryckbosch, D; Thyssen, F; Tytgat, M; Vanelderen, L; Verwilligen, P; Basegmez, S; Bruno, G; Caudron, J; Delaere, C; Demin, P; Favart, D; Giammanco, A; Grégoire, G; Lemaitre, V; Militaru, O; Ovyn, S; Piotrzkowski, K; Quertenmont, L; Schul, N; Beliy, N; Daubie, E; Alves, G A; Pol, M E; Souza, M H G; Carvalho, W; De Jesus Damiao, D; De Oliveira Martins, C; Fonseca De Souza, S; Mundim, L; Oguri, V; Santoro, A; Silva Do Amaral, S M; Sznajder, A; Fernandez Perez Tomei, T R; Ferreira Dias, M A; Gregores, E M; Novaes, S F; Abadjiev, K; Anguelov, T; Damgov, J; Darmenov, N; Dimitrov, L; Genchev, V; Iaydjiev, P; Piperov, S; Stoykova, S; Sultanov, G; Trayanov, R; Vankov, I; Dimitrov, A; Dyulendarova, M; Kozhuharov, V; Litov, L; Marinova, E; Mateev, M; Pavlov, B; Petkov, P; Toteva, Z; Chen, G M; Chen, H S; Guan, W; Jiang, C H; Liang, D; Liu, B; Meng, X; Tao, J; Wang, J; Wang, Z; Xue, Z; Zhang, Z; Ban, Y; Cai, J; Ge, Y; Guo, S; Hu, Z; Mao, Y; Qian, S J; Teng, H; Zhu, B; Avila, C; Baquero Ruiz, M; Carrillo Montoya, C A; Gomez, A; Gomez Moreno, B; Ocampo Rios, A A; Osorio Oliveros, A F; Reyes Romero, D; Sanabria, J C; Godinovic, N; Lelas, K; Plestina, R; Polic, D; Puljak, I; Antunovic, Z; Dzelalija, M; Brigljevic, V; Duric, S; Kadija, K; Morovic, S; Fereos, R; Galanti, M; Mousa, J; Papadakis, A; Ptochos, F; Razis, P A; Tsiakkouri, D; Zinonos, Z; Hektor, A; Kadastik, M; Kannike, K; Müntel, M; Raidal, M; Rebane, L; Anttila, E; Czellar, S; Härkönen, J; Heikkinen, A; Karimäki, V; Kinnunen, R; Klem, J; Kortelainen, M J; Lampén, T; Lassila-Perini, K; Lehti, S; Lindén, T; Luukka, P; Mäenpää, T; Nysten, J; Tuominen, E; Tuominiemi, J; Ungaro, D; Wendland, L; Banzuzi, K; Korpela, A; Tuuva, T; Nedelec, P; Sillou, D; Besancon, M; Chipaux, R; Dejardin, M; Denegri, D; Descamps, J; Fabbro, B; Faure, J L; Ferri, F; Ganjour, S; Gentit, F X; Givernaud, A; Gras, P; Hamel de Monchenault, G; Jarry, P; Lemaire, M C; Locci, E; Malcles, J; Marionneau, M; Millischer, L; Rander, J; Rosowsky, A; Rousseau, D; Titov, M; Verrecchia, P; Baffioni, S; Bianchini, L; Bluj, M; Busson, P; Charlot, C; Dobrzynski, L; Granier de Cassagnac, R; Haguenauer, M; Miné, P; Paganini, P; Sirois, Y; Thiebaux, C; Zabi, A; Agram, J L; Besson, A; Bloch, D; Bodin, D; Brom, J M; Conte, E; Drouhin, F; Fontaine, J C; Gelé, D; Goerlach, U; Gross, L; Juillot, P; Le Bihan, A C; Patois, Y; Speck, J; Van Hove, P; Baty, C; Bedjidian, M; Blaha, J; Boudoul, G; Brun, H; Chanon, N; Chierici, R; Contardo, D; Depasse, P; Dupasquier, T; El Mamouni, H; Fassi, F; Fay, J; Gascon, S; Ille, B; Kurca, T; Le Grand, T; Lethuillier, M; Lumb, N; Mirabito, L; Perries, S; Vander Donckt, M; Verdier, P; Djaoshvili, N; Roinishvili, N; Roinishvili, V; Amaglobeli, N; Adolphi, R; Anagnostou, G; Brauer, R; Braunschweig, W; Edelhoff, M; Esser, H; Feld, L; Karpinski, W; Khomich, A; Klein, K; Mohr, N; Ostaptchouk, A; Pandoulas, D; Pierschel, G; Raupach, F; Schael, S; Schultz von Dratzig, A; Schwering, G; Sprenger, D; Thomas, M; Weber, M; Wittmer, B; Wlochal, M; Actis, O; Altenhöfer, G; Bender, W; Biallass, P; Erdmann, M; Fetchenhauer, G; Frangenheim, J; Hebbeker, T; Hilgers, G; Hinzmann, A; Hoepfner, K; Hof, C; Kirsch, M; Klimkovich, T; Kreuzer, P; Lanske, D; Merschmeyer, M; Meyer, A; Philipps, B; Pieta, H; Reithler, H; Schmitz, S A; Sonnenschein, L; Sowa, M; Steggemann, J; Szczesny, H; Teyssier, D; Zeidler, C; Bontenackels, M; Davids, M; Duda, M; Flügge, G; Geenen, H; Giffels, M; Haj Ahmad, W; Hermanns, T; Heydhausen, D; Kalinin, S; Kress, T; Linn, A; Nowack, A; Perchalla, L; Poettgens, M; Pooth, O; Sauerland, P; Stahl, A; Tornier, D; Zoeller, M H; Aldaya Martin, M; Behrens, U; Borras, K; Campbell, A; Castro, E; Dammann, D; Eckerlin, G; Flossdorf, A; Flucke, G; Geiser, A; Hatton, D; Hauk, J; Jung, H; Kasemann, M; Katkov, I; Kleinwort, C; Kluge, H; Knutsson, A; Kuznetsova, E; Lange, W; Lohmann, W; Mankel, R; Marienfeld, M; Meyer, A B; Miglioranzi, S; Mnich, J; Ohlerich, M; Olzem, J; Parenti, A; Rosemann, C; Schmidt, R; Schoerner-Sadenius, T; Volyanskyy, D; Wissing, C; Zeuner, W D; Autermann, C; Bechtel, F; Draeger, J; Eckstein, D; Gebbert, U; Kaschube, K; Kaussen, G; Klanner, R; Mura, B; Naumann-Emme, S; Nowak, F; Pein, U; Sander, C; Schleper, P; Schum, T; Stadie, H; Steinbrück, G; Thomsen, J; Wolf, R; Bauer, J; Blüm, P; Buege, V; Cakir, A; Chwalek, T; De Boer, W; Dierlamm, A; Dirkes, G; Feindt, M; Felzmann, U; Frey, M; Furgeri, A; Gruschke, J; Hackstein, C; Hartmann, F; Heier, S; Heinrich, M; Held, H; Hirschbuehl, D; Hoffmann, K H; Honc, S; Jung, C; Kuhr, T; Liamsuwan, T; Martschei, D; Mueller, S; Müller, Th; Neuland, M B; Niegel, M; Oberst, O; Oehler, A; Ott, J; Peiffer, T; Piparo, D; Quast, G; Rabbertz, K; Ratnikov, F; Ratnikova, N; Renz, M; Saout, C; Sartisohn, G; Scheurer, A; Schieferdecker, P; Schilling, F P; Schott, G; Simonis, H J; Stober, F M; Sturm, P; Troendle, D; Trunov, A; Wagner, W; Wagner-Kuhr, J; Zeise, M; Zhukov, V; Ziebarth, E B; Daskalakis, G; Geralis, T; Karafasoulis, K; Kyriakis, A; Loukas, D; Markou, A; Markou, C; Mavrommatis, C; Petrakou, E; Zachariadou, A; Gouskos, L; Katsas, P; Panagiotou, A; Evangelou, I; Kokkas, P; Manthos, N; Papadopoulos, I; Patras, V; Triantis, F A; Bencze, G; Boldizsar, L; Debreczeni, G; Hajdu, C; Hernath, S; Hidas, P; Horvath, D; Krajczar, K; Laszlo, A; Patay, G; Sikler, F; Toth, N; Vesztergombi, G; Beni, N; Christian, G; Imrek, J; Molnar, J; Novak, D; Palinkas, J; Szekely, G; Szillasi, Z; Tokesi, K; Veszpremi, V; Kapusi, A; Marian, G; Raics, P; Szabo, Z; Trocsanyi, Z L; Ujvari, B; Zilizi, G; Bansal, S; Bawa, H S; Beri, S B; Bhatnagar, V; Jindal, M; Kaur, M; Kaur, R; Kohli, J M; Mehta, M Z; Nishu, N; Saini, L K; Sharma, A; Singh, A; Singh, J B; Singh, S P; Ahuja, S; Arora, S; Bhattacharya, S; Chauhan, S; Choudhary, B C; Gupta, P; Jain, S; Jha, M; Kumar, A; Ranjan, K; Shivpuri, R K; Srivastava, A K; Choudhury, R K; Dutta, D; Kailas, S; Kataria, S K; Mohanty, A K; Pant, L M; Shukla, P; Topkar, A; Aziz, T; Guchait, M; Gurtu, A; Maity, M; Majumder, D; Majumder, G; Mazumdar, K; Nayak, A; Saha, A; Sudhakar, K; Banerjee, S; Dugad, S; Mondal, N K; Arfaei, H; Bakhshiansohi, H; Fahim, A; Jafari, A; Mohammadi Najafabadi, M; Moshaii, A; Paktinat Mehdiabadi, S; Rouhani, S; Safarzadeh, B; Zeinali, M; Felcini, M; Abbrescia, M; Barbone, L; Chiumarulo, F; Clemente, A; Colaleo, A; Creanza, D; Cuscela, G; De Filippis, N; De Palma, M; De Robertis, G; Donvito, G; Fedele, F; Fiore, L; Franco, M; Iaselli, G; Lacalamita, N; Loddo, F; Lusito, L; Maggi, G; Maggi, M; Manna, N; Marangelli, B; My, S; Natali, S; Nuzzo, S; Papagni, G; Piccolomo, S; Pierro, G A; 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    2010-01-01

    The CMS Collaboration conducted a month-long data-taking exercise known as the Cosmic Run At Four Tesla in late 2008 in order to complete the commissioning of the experiment for extended operation. The operational lessons resulting from this exercise were addressed in the subsequent shutdown to better prepare CMS for LHC beams in 2009. The cosmic data collected have been invaluable to study the performance of the detectors, to commission the alignment and calibration techniques, and to make several cosmic ray measurements. The experimental setup, conditions, and principal achievements from this data-taking exercise are described along with a review of the preceding integration activities.

  6. Commissioning of the CMS Experiment and the Cosmic Run at Four Tesla

    CERN Document Server

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Dagenhart, W; Demarteau, M; Derylo, G; Dykstra, D; Eartly, D P; Elias, J E; Elvira, V D; Evans, D; Feng, L; Fischler, M; Fisk, I; Foulkes, S; Freeman, J; Gartung, P; Gottschalk, E; Grassi, T; Green, D; Guo, Y; Gutsche, O; Hahn, A; Hanlon, J; Harris, R M; Holzman, B; Howell, J; Hufnagel, D; James, E; Jensen, H; Johnson, M; Jones, C D; Joshi, U; Juska, E; Kaiser, J; Klima, B; Kossiakov, S; Kousouris, K; Kwan, S; Lei, C M; Limon, P; Lopez Perez, J A; Los, S; Lueking, L; Lukhanin, G; Lusin, S; Lykken, J; Maeshima, K; Marraffino, J M; Mason, D; McBride, P; Miao, T; Mishra, K; Moccia, S; Mommsen, R; Mrenna, S; Muhammad, A S; Newman-Holmes, C; Noeding, C; O'Dell, V; Prokofyev, O; Rivera, R; Rivetta, C H; Ronzhin, A; Rossman, P; Ryu, S; Sekhri, V; Sexton-Kennedy, E; Sfiligoi, I; Sharma, S; Shaw, T M; Shpakov, D; Skup, E; Smith, R P; Soha, A; Spalding, W J; Spiegel, L; Suzuki, I; Tan, P; Tanenbaum, W; Tkaczyk, S; Trentadue, R; Uplegger, L; Vaandering, E W; Vidal, R; Whitmore, J; Wicklund, E; Wu, W; Yarba, J; Yumiceva, F; Yun, J C; Acosta, D; Avery, P; Barashko, V; Bourilkov, D; Chen, M; Di Giovanni, G P; Dobur, D; Drozdetskiy, A; Field, R D; Fu, Y; Furic, I K; Gartner, J; Holmes, D; Kim, B; Klimenko, S; Konigsberg, J; Korytov, A; Kotov, K; Kropivnitskaya, A; Kypreos, T; Madorsky, A; Matchev, K; Mitselmakher, G; Pakhotin, Y; Piedra Gomez, J; Prescott, C; Rapsevicius, V; Remington, R; Schmitt, M; Scurlock, B; Wang, D; Yelton, J; Ceron, C; Gaultney, V; Kramer, L; Lebolo, L M; Linn, S; Markowitz, P; Martinez, G; Rodriguez, J L; Adams, T; Askew, A; Baer, H; Bertoldi, M; Chen, J; Dharmaratna, W G D; Gleyzer, S V; Haas, J; Hagopian, S; Hagopian, V; Jenkins, M; Johnson, K F; Prettner, E; Prosper, H; Sekmen, S; Baarmand, M M; Guragain, S; Hohlmann, M; Kalakhety, H; Mermerkaya, H; Ralich, R; Vodopiyanov, I; Abelev, B; Adams, M R; Anghel, I M; Apanasevich, L; Bazterra, V E; Betts, R R; Callner, J; Castro, M A; Cavanaugh, R; Dragoiu, C; Garcia-Solis, E J; Gerber, C E; Hofman, D J; Khalatian, S; Mironov, C; Shabalina, E; Smoron, A; Varelas, N; Akgun, U; Albayrak, E A; Ayan, A S; Bilki, B; Briggs, R; Cankocak, K; Chung, K; Clarida, W; Debbins, P; Duru, F; Ingram, F D; Lae, C K; McCliment, E; Merlo, J P; Mestvirishvili, A; Miller, M J; Moeller, A; Nachtman, J; Newsom, C R; Norbeck, E; Olson, J; Onel, Y; Ozok, F; Parsons, J; Schmidt, I; Sen, S; Wetzel, J; Yetkin, T; Yi, K; Barnett, B A; Blumenfeld, B; Bonato, A; Chien, C Y; Fehling, D; Giurgiu, G; Gritsan, A V; Guo, Z J; Maksimovic, P; Rappoccio, S; Swartz, M; Tran, N V; Zhang, Y; Baringer, P; Bean, A; Grachov, O; Murray, M; Radicci, V; Sanders, S; Wood, J S; Zhukova, V; Bandurin, D; Bolton, T; Kaadze, K; Liu, A; Maravin, Y; Onoprienko, D; Svintradze, I; Wan, Z; Gronberg, J; Hollar, J; Lange, D; Wright, D; Baden, D; Bard, R; Boutemeur, M; Eno, S C; Ferencek, D; Hadley, N J; Kellogg, R G; Kirn, M; Kunori, S; Rossato, K; Rumerio, P; Santanastasio, F; Skuja, A; Temple, J; Tonjes, M B; Tonwar, S C; Toole, T; Twedt, E; Alver, B; Bauer, G; Bendavid, J; Busza, W; Butz, E; Cali, I A; Chan, M; D'Enterria, D; Everaerts, P; Gomez Ceballos, G; Hahn, K A; Harris, P; Jaditz, S; Kim, Y; Klute, M; Lee, Y J; Li, W; Loizides, C; Ma, T; Miller, M; Nahn, S; Paus, C; Roland, C; Roland, G; Rudolph, M; Stephans, G; Sumorok, K; Sung, K; Vaurynovich, S; Wenger, E A; Wyslouch, B; Xie, S; Yilmaz, Y; Yoon, A S; Bailleux, D; Cooper, S I; Cushman, P; Dahmes, B; De Benedetti, A; Dolgopolov, A; Dudero, P R; Egeland, R; Franzoni, G; Haupt, J; Inyakin, A; Klapoetke, K; Kubota, Y; Mans, J; Mirman, N; Petyt, D; Rekovic, V; Rusack, R; Schroeder, M; Singovsky, A; Zhang, J; Cremaldi, L M; Godang, R; Kroeger, R; Perera, L; Rahmat, R; Sanders, D A; Sonnek, P; Summers, D; Bloom, K; Bockelman, B; Bose, S; Butt, J; Claes, D R; Dominguez, A; Eads, M; Keller, J; Kelly, T; Kravchenko, I; Lazo-Flores, J; Lundstedt, C; Malbouisson, H; Malik, S; Snow, G R; Baur, U; Iashvili, I; Kharchilava, A; Kumar, A; Smith, K; Strang, M; Alverson, G; Barberis, E; Boeriu, O; Eulisse, G; Govi, G; McCauley, T; Musienko, Y; Muzaffar, S; Osborne, I; Paul, T; Reucroft, S; Swain, J; Taylor, L; Tuura, L; Anastassov, A; Gobbi, B; Kubik, A; Ofierzynski, R A; Pozdnyakov, A; Schmitt, M; Stoynev, S; Velasco, M; Won, S; Antonelli, L; Berry, D; Hildreth, M; Jessop, C; Karmgard, D J; Kolberg, T; Lannon, K; Lynch, S; Marinelli, N; Morse, D M; Ruchti, R; Slaunwhite, J; Warchol, J; Wayne, M; Bylsma, B; Durkin, L S; Gilmore, J; Gu, J; Killewald, P; Ling, T Y; Williams, G; Adam, N; Berry, E; Elmer, P; Garmash, A; Gerbaudo, D; Halyo, V; Hunt, A; Jones, J; Laird, E; Marlow, D; Medvedeva, T; Mooney, M; Olsen, J; Piroué, P; Stickland, D; Tully, C; Werner, J S; Wildish, T; Xie, Z; Zuranski, A; Acosta, J G; Bonnett Del Alamo, M; Huang, X T; Lopez, A; Mendez, H; Oliveros, S; Ramirez Vargas, J E; Santacruz, N; Zatzerklyany, A; Alagoz, E; Antillon, E; Barnes, V E; Bolla, G; Bortoletto, D; Everett, A; Garfinkel, A F; Gecse, Z; Gutay, L; Ippolito, N; Jones, M; Koybasi, O; Laasanen, A T; Leonardo, N; Liu, C; Maroussov, V; Merkel, P; Miller, D H; Neumeister, N; Sedov, A; Shipsey, I; Yoo, H D; Zheng, Y; Jindal, P; Parashar, N; Cuplov, V; Ecklund, K M; Geurts, F J M; Liu, J H; Maronde, D; Matveev, M; Padley, B P; Redjimi, R; Roberts, J; Sabbatini, L; Tumanov, A; Betchart, B; Bodek, A; Budd, H; Chung, Y S; de Barbaro, P; Demina, R; Flacher, H; Gotra, Y; Harel, A; Korjenevski, S; Miner, D C; Orbaker, D; Petrillo, G; Vishnevskiy, D; Zielinski, M; Bhatti, A; Demortier, L; Goulianos, K; Hatakeyama, K; Lungu, G; Mesropian, C; Yan, M; Atramentov, O; Bartz, E; Gershtein, Y; Halkiadakis, E; Hits, D; Lath, A; Rose, K; Schnetzer, S; Somalwar, S; Stone, R; Thomas, S; Watts, T L; Cerizza, G; Hollingsworth, M; Spanier, S; Yang, Z C; York, A; Asaadi, J; Aurisano, A; Eusebi, R; Golyash, A; Gurrola, A; Kamon, T; Nguyen, C N; Pivarski, J; Safonov, A; Sengupta, S; Toback, D; Weinberger, M; Akchurin, N; Berntzon, L; Gumus, K; Jeong, C; Kim, H; Lee, S W; Popescu, S; Roh, Y; Sill, A; Volobouev, I; Washington, E; Wigmans, R; Yazgan, E; Engh, D; Florez, C; Johns, W; Pathak, S; Sheldon, P; Andelin, D; Arenton, M W; Balazs, M; Boutle, S; Buehler, M; Conetti, S; Cox, B; Hirosky, R; Ledovskoy, A; Neu, C; Phillips II, D; Ronquest, M; Yohay, R; Gollapinni, S; Gunthoti, K; Harr, R; Karchin, P E; Mattson, M; Sakharov, A; Anderson, M; Bachtis, M; Bellinger, J N; Carlsmith, D; Crotty, I; Dasu, S; Dutta, S; Efron, J; Feyzi, F; Flood, K; Gray, L; Grogg, K S; Grothe, M; Hall-Wilton, R; Jaworski, M; Klabbers, P; Klukas, J; Lanaro, A; Lazaridis, C; Leonard, J; Loveless, R; Magrans de Abril, M; Mohapatra, A; Ott, G; Polese, G; Reeder, D; Savin, A; Smith, W H; Sourkov, A; Swanson, J; Weinberg, M; Wenman, D; Wensveen, M; White, A

    2010-01-01

    The CMS Collaboration conducted a month-long data-taking exercise known as the Cosmic Run At Four Tesla in late 2008 in order to complete the commissioning of the experiment for extended operation. The operational lessons resulting from this exercise were addressed in the subsequent shutdown to better prepare CMS for LHC beams in 2009. The cosmic data collected have been invaluable to study the performance of the detectors, to commission the alignment and calibration techniques, and to make several cosmic ray measurements. The experimental setup, conditions, and principal achievements from this data-taking exercise are described along with a review of the preceding integration activities.

  7. The CMS experiment at the CERN LHC

    OpenAIRE

    Adolphi et al., R.

    2008-01-01

    This article is available open access. Copyright @ 2008 IOP Publishing Ltd and SISSA. The Compact Muon Solenoid (CMS) detector is described. The detector operates at the Large Hadron Collider (LHC) at CERN. It was conceived to study proton-proton (and lead-lead) collisions at a centre-of-mass energy of 14 TeV (5.5 TeV nucleon-nucleon) and at luminosities up to 1034 cm−2 s−1 (1027 cm−2 s−1). At the core of the CMS detector sits a high-magnetic-field and large-bore superconducting solenoid s...

  8. Analysis of the CMS visitors feedback Poster

    CERN Multimedia

    Davis, Siona Ruth

    CMS welcomed over 5500 visitors underground during the 2013 CERN Open Days and more than 4500 during the Neighbourhood Days of 2014 on the occasion of CERN’s 60th anniversary. During the latter event, visitors gave their feedback on the visit experience by answering three questions: • In one sentence, what will you tell your friends about what you saw today? • What fact or story that you heard today impressed you the most? • Describe the CMS detector in three words. This poster will show the analysis of the answers given by visitors.

  9. Analysis of the CMS visitors feedback Poster

    CERN Multimedia

    Davis, Siona Ruth

    2016-01-01

    CMS welcomed over 5500 visitors underground during the 2013 CERN Open Days and more than 4500 during the Neighbourhood Days of 2014 on the occasion of CERN’s 60th anniversary. During the latter event, visitors gave their feedback on the visit experience by answering three questions: • In one sentence, what will you tell your friends about what you saw today? • What fact or story that you heard today impressed you the most? • Describe the CMS detector in three words. This poster will show the analysis of the answers given by visitors.

  10. Tests of CMS MSGC Modules at PSI

    CERN Document Server

    Beaumont, Willem; Bernier, Kim; Blum, Peter; Bouhali, Othmane; Boulogne, Isabelle; Bozzo, Marco; Brez, Alessandro; Buzulutskov, A; Coffin, Jean-Pierre Coffin; Daubie, Evelyne; De Lentdecker, Gilles; Devroede, O; Erbacher, Th; Fahrer, Manuel; Fontaine, Jean-Charles; Flügge, Gunter; Gariano, G; Geist, Walter M; Gottschalk, M; Helleboid, Jean-Marie; Huss, Daniel; Iacopi, F; Kärcher, Kurt; Latronico, Luca; Lounis, Abdenour; Lumb, Nicholas; Maazouzi, Chaker; Macke, D; Massai, Marco Maria; Mörmann, Dirk; Müller, Th; Neuberger, D; Nowack, Andreas; Papanestis, Antonios; Raffo, R; Roederer, Frank; Schulte, R; Shekhtman, L I; Sigward, M H; Simonis, H J; Spandre, Gloria; Spezziga, Mario; Struczinski, W; Tatarinov, A A; Toropin, Alexander N.; Van Doninck, Walter; Van Dyck, C; Van Lancker, Luc; Van der Velde, C; Vanlaer, Pascal; Bellazzini, Ronaldo; Zander, A; Barvich, Tobias; Zghiche, Amina; Zhukov, Valery; Brom, Jean-Marie; Ageron, M; Chowotz, Piotr; Albert, A; Mirabito, Laurent; Bluem, P.; Kaercher, K; Moermann, Dirk; Mueller, Th; Roederer, Frank; Weiler, Thomas

    1999-01-01

    The CMS experiment, to be installed at the future p-p collider LHC at CERN, foresees the use of Micro-Strip Gas Counters ( MSGC's) for the outer layers of its central tracker. Present developments focus on the reliability of MSGC's in the harsh radiation environment imposed by the LHC. This paper reports on tests of two baseline CMS MSGC's identical to those foreseen for the barrel part of the tracker, in a high intensity pion beam at the Paul Scherrer Institute ( PSI), in april 1999.

  11. Experience with the CMS Event Data Model

    Energy Technology Data Exchange (ETDEWEB)

    Elmer, P.; /Princeton U.; Hegner, B.; /CERN; Sexton-Kennedy, L.; /Fermilab

    2009-06-01

    The re-engineered CMS EDM was presented at CHEP in 2006. Since that time we have gained a lot of operational experience with the chosen model. We will present some of our findings, and attempt to evaluate how well it is meeting its goals. We will discuss some of the new features that have been added since 2006 as well as some of the problems that have been addressed. Also discussed is the level of adoption throughout CMS, which spans the trigger farm up to the final physics analysis. Future plans, in particular dealing with schema evolution and scaling, will be discussed briefly.

  12. CMS Tracker Alignment Performance Results Summer 2016

    CERN Document Server

    CMS Collaboration

    2016-01-01

    The tracking system of the CMS detector provides excellent resolution for charged particle tracks and an efficient way of tagging jets. In order to reconstruct good quality tracks, the position and orientation of each silicon pixel and strip modules need to be determined with a precision of several micrometers. The performance of the CMS tracker alignment in 2016 using cosmic-ray data recorded at 0 T magnetic field and proton-proton collision data recorded at 3.8 T magnetic field has been studied. The data-driven validation of the results are presented. The time-dependent movement of the pixel detector's large-scale structure is demonstrated.

  13. Heavy Flavour Production at ATLAS and CMS

    CERN Document Server

    Barton, Adam Edward; The ATLAS collaboration

    2015-01-01

    Measurements of heavy-flavor properties are an important part of the physics program of the ATLAS and CMS experiments at LHC. They can potentionally expose physics beyond the standard model, constrain supersymmetry and advance hadron spectroscopy and test QCD. In the past years, the two experiments have published results in several different fields, such as rare decays, searches for new states, CP and P violation and quarkonia polarization. In this note, some of the most recent results from ATLAS and CMS are summarized.

  14. Highlights and perspectives from the CMS experiment

    CERN Document Server

    Butler, Joel Nathan

    2017-01-01

    In 2016, the Large Hadron Collider provided proton-proton collisions at 13 TeV center-of-mass energy and achieved very high luminosity and reliablity. The performance of the CMS Experiment in this running period and a selection of recent physics results are presented. These include precision measurements and searches for new particles. The status and prospects for data-taking in 2017 and a brief summary of the highlights of the High Luminosity (HL-LHC) upgrade of the CMS detector are also presented.

  15. Beyond the discovery Higgs results from CMS

    CERN Document Server

    AUTHOR|(CDS)2051212

    2015-01-01

    The observation of a Higgs boson at a mass near 125 GeV in the year 2012 has been a milestone for elementary particle physics. Since this fundamental discovery, the CMS collaboration has scrutinized the complete Run I dataset in depth, and studied the properties of the observed state in full detail. This includes investigations of more elusive production and decay modes, as well as searches for first indications of an extended Higgs sector, which would represent very likely a promising gateway to new physics. This presentation summarizes recent Higgs results from the CMS experiment.

  16. Website development with PyroCMS

    CERN Document Server

    Vineyard, Zachary

    2013-01-01

    A practical and a fast-paced guide that gives you all the information you need to start developing websites with PyroCMS. The book is an excellent resource for developers and makes website development easy and financially viable for everyone.This book is ideal if you are a PHP developer who is looking for a great content management system or a web developer looking to speed up your development times. If you are a web developer, you will need to have some familiarity with OOP and the MVC programming pattern, especially if you want to extend PyroCMS by building add-ons.

  17. Highlights and Perspectives from the CMS Experiment

    Energy Technology Data Exchange (ETDEWEB)

    Butler, Joel Nathan [Fermilab

    2017-09-09

    In 2016, the Large Hadron Collider provided proton-proton collisions at 13 TeV center-of-mass energy and achieved very high luminosity and reliability. The performance of the CMS Experiment in this running period and a selection of recent physics results are presented. These include precision measurements and searches for new particles. The status and prospects for data-taking in 2017 and a brief summary of the highlights of the High Luminosity (HL-LHC) upgrade of the CMS detector are also presented.

  18. CMS-Wave Model: Part 3: Grid Nesting and Application Example for Rhode Island South Shore Regional Sediment Management Study

    Science.gov (United States)

    2010-07-01

    grid nesting capability of the Coastal Modeling System ( CMS ) wave model CMS -Wave availa- ble in the U.S. Army Corps of Engineers (USACE) Surface-water...Martin, 2004). The motivation behind RISRSM is to identify the sediment pathways in a system at a regional scale for management of sediment based on...a system approach. The RISRSM is developing a management plan for sediments along the project study area that consists of a 38 km stretch of

  19. Thirty-sixth jewel in the CMS crown

    CERN Multimedia

    CERN Audiovisual Unit

    2007-01-01

    With the utmost care and attention, the thirty-sixth and final crystal supermodule has been installed in the CMS electromagnetic calorimeter barrels. Comments from Olivier Teller, CMS ECAL project engineer

  20. Le détecteur CMS, une histoire belge

    CERN Multimedia

    2008-01-01

    Among the four detectors laid out on the ring of the LHC (the experiments Atlas, CMS, Alice and LHCb), one is interesting the Belgian physicists more particularly. They collaborate indeed since 1993 in the development of the CMS

  1. CMS in 2014-2015: New Roles, New Challenges

    CERN Multimedia

    2014-01-01

    CMS has a new team leading the collaboration. Tiziano Camporesi, the new CMS Spokesperson, and his deputies, Kerstin Borras and Paris Sphicas, discuss the challenges and excitement of the next two years.

  2. Particle Tracking Model (PTM) with Coastal Modeling System (CMS)

    Science.gov (United States)

    2014-10-31

    System ( CMS ) 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER...www.erdc.usace.army.mil/Missions/WaterResources/CIRP.aspx Coastal Inlets Research Program Particle Tracking Model (PTM) with Coastal Modeling System ( CMS ) The...System ( CMS ), which provides coupled wave and current forcing for PTM simulations. CMS -PTM is implemented in the Surface-water Modeling System, a

  3. VIP visit to CERN P5 CMS of Pakistan Science Members

    CERN Multimedia

    Hoch, Michael

    2012-01-01

    VIP visit to CERN P5 CMS of PAEC & JCPC Science Members List of PAEC Visitors: Dr. Badar Suleman - Member Science PAEC & Member of JCPC Dr. Waqar M. Butt - Member Engineering (Head of HMC3) Dr. Maqsood Ahmad - Chief Scientist (Head of Accelerator Project) List of CMS participants: Prof. Joseph Incandela, CMS Spokesperson Dr. Austin Ball, CMS Technical Coordinator Mr Andrzej Charkiewicz, CMS Resources Manager Dr. Michael Hoch, CMS Outreach activities, CMS photographer and guide Dr. Achille Petrilli, CMS Team Leader

  4. Temporal summation in muscles and referred pain areas: an experimental human study.

    Science.gov (United States)

    Arendt-Nielsen, L; Graven-Nielsen, T; Svensson, P; Jensen, T S

    1997-10-01

    The aim of the present study was to assess temporal summation within saline-induced, localized and referred muscle pain areas. The sensibility to single and repeated electrical stimuli were assessed in the muscle by means of needle electrodes and in the referred pain area by surface stimulation. The study demonstrates that temporal summation of nociceptive input from muscles exists and that the responses to single and repeated nociceptive stimuli of the referred pain area are facilitated.

  5. CMS Virtual Visits @ European Researchers Night, 30 September 2016

    CERN Multimedia

    Lapka, Marzena

    2016-01-01

    CMS hosted four virtual visits during European Researchers Night. Audience from Greece (NCRS Demokritos, Athens), Poland (University of Science and Technology in Krakow), Italy (Psiquadro in Perugia & INFN in Pisa) and Portugal (Planetarium Calouste Gulbenkian, organised by LIP) had an occasion to converse with CMS researchers and "virtually" visit CMS Control Room and underground facilities.

  6. 42 CFR 411.379 - When CMS accepts a request.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false When CMS accepts a request. 411.379 Section 411.379... Physicians and Entities Furnishing Designated Health Services § 411.379 When CMS accepts a request. (a) Upon receiving a request for an advisory opinion, CMS promptly makes an initial determination of whether...

  7. 42 CFR 411.386 - CMS's advisory opinions as exclusive.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false CMS's advisory opinions as exclusive. 411.386... Relationships Between Physicians and Entities Furnishing Designated Health Services § 411.386 CMS's advisory... described in § 411.370. CMS has not and does not issue a binding advisory opinion on the subject matter...

  8. 42 CFR 422.210 - Assurances to CMS.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Assurances to CMS. 422.210 Section 422.210 Public...) MEDICARE PROGRAM MEDICARE ADVANTAGE PROGRAM Relationships With Providers § 422.210 Assurances to CMS. (a) Assurances to CMS. Each organization will provide assurance satisfactory to the Secretary that...

  9. 42 CFR 405.1834 - CMS reviewing official procedure.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false CMS reviewing official procedure. 405.1834 Section... Determinations and Appeals § 405.1834 CMS reviewing official procedure. (a) Scope. A provider that is a party to... Administrator by a designated CMS reviewing official who considers whether the decision of the...

  10. Implementation of Structures in the CMS:Part 3, Culvert

    Science.gov (United States)

    2013-08-01

    describes the mathematical formulation and numerical implementation of a culvert in the Coastal Modeling System ( CMS ) operated through the Surface...wetland application in Chesapeake Bay, Maryland. Figure 1. (a) Circular culvert, and (b) rectangular culvert. COASTAL MODELING SYSTEM : The CMS ...this application the same CMS model was adopted, culvert structures configured in the system , and a 50-day simulation was conducted. The

  11. 42 CFR 460.18 - CMS evaluation of applications.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false CMS evaluation of applications. 460.18 Section 460... ELDERLY (PACE) PACE Organization Application and Waiver Process § 460.18 CMS evaluation of applications. CMS evaluates an application for approval as a PACE organization on the basis of the...

  12. 42 CFR 423.2264 - Guidelines for CMS review.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Guidelines for CMS review. 423.2264 Section 423....2264 Guidelines for CMS review. In reviewing marketing material or enrollment forms under § 423.2262, CMS determines (unless otherwise specified in additional guidance) that the marketing materials—...

  13. 42 CFR 403.248 - Administrative review of CMS determinations.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false Administrative review of CMS determinations. 403... Certification Program: General Provisions § 403.248 Administrative review of CMS determinations. (a) This section provides for administrative review if CMS determines— (1) Not to certify a policy; or (2) That...

  14. 42 CFR 422.2264 - Guidelines for CMS review.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 3 2010-10-01 2010-10-01 false Guidelines for CMS review. 422.2264 Section 422... Guidelines for CMS review. In reviewing marketing material or election forms under § 422.2262 of this part, CMS determines that the marketing materials— (a) Provide, in a format (and, where appropriate,...

  15. 42 CFR 438.724 - Notice to CMS.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Notice to CMS. 438.724 Section 438.724 Public...) MEDICAL ASSISTANCE PROGRAMS MANAGED CARE Sanctions § 438.724 Notice to CMS. (a) The State must give the CMS Regional Office written notice whenever it imposes or lifts a sanction for one of the...

  16. 42 CFR 433.320 - Procedures for refunds to CMS.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Procedures for refunds to CMS. 433.320 Section 433... Overpayments to Providers § 433.320 Procedures for refunds to CMS. (a) Basic requirements. (1) The agency must refund the Federal share of overpayments that are subject to recovery to CMS through a credit on...

  17. 42 CFR 457.1003 - CMS review of waiver requests.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false CMS review of waiver requests. 457.1003 Section 457.1003 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES... Waivers: General Provisions § 457.1003 CMS review of waiver requests. CMS will review the waiver...

  18. The CMS Collaboration Board (CB) chairperson, deputy and secretary, with the CMS Spokesperson and deputies

    CERN Multimedia

    Lapka, M

    2012-01-01

    From left to right: Jorgen D'Hondt (CB Secretary), Claudia Wulz (CB Deputy Chair), Tiziano Camporesi (Deputy Spokesperson), Ian Shipsey (new CB Chair 2013-2014), Joe Incandela (CMS Spokesperson), Joao Varela (Deputy Spokesperson)

  19. Section of CMS Beam Pipe Removed

    CERN Multimedia

    2013-01-01

    Seven components of the beam pipe located at the heart of the CMS detector were removed in recent weeks. The delicate operations were performed in several stages as the detector was opened. Video of the extraction of one section: http://youtu.be/arGuFgWM7u0

  20. Future prospects of Higgs Physics at CMS

    OpenAIRE

    2014-01-01

    The Higgs boson physics reach of the CMS detector with 300(0) fb-1 of proton-proton collisions at sqrt{s} = 14 TeV is presented. Precision measurements of the Higgs boson properties, Higgs boson pair production and self-coupling, rare Higgs boson decays, and the potential for additional Higgs bosons are discussed.

  1. Jet substructure measurements at ATLAS and CMS

    CERN Document Server

    Dattagupta, Aparajita; The ATLAS collaboration

    2017-01-01

    A review is given of recent Run II measurements of jet substructure at CMS and ATLAS, as well of the most relevant measurements from Run I. Quark and gluon discrimination, jet mass and other substructure observable are discussed together with prospects for future measurements with new insight from theory.

  2. CMS: the first barrel ring completed!

    CERN Multimedia

    2000-01-01

    Seven years after design studies began, CERN and the German company DWE have erected the first of the five CMS yoke rings, a giant component weighing 1200 tonnes. The first ring of the CMS magnet yoke, a twelve-sided 15-metre-high colossus, has been erected in the new hall at Point 5 near Cessy. For the last few days it has stood unaided, no longer relying on the central structure required for its assembly. Its construction marks an important milestone in the CMS programme, the culmination of seven years of work at CERN and over two years of manufacturing at DWE. Awarded the contract by the Swiss Federal Institute of Technology (ETH), Zürich, the German manufacturer has produced and assembled the ring components in collaboration with a team from CERN. This feat of mechanical engineering was celebrated two weeks ago at a drink attended by the main protagonists, headed by Franz Kufner, divisional manager at DWE, Franz Leher, production engineer at DWE, Alain Hervé, CMS technical coordinator,...

  3. SUSY Searches at ATLAS and CMS

    CERN Document Server

    Duarte-Campderros, Jorge; The ATLAS collaboration

    2017-01-01

    This talk summarises ATLAS and CMS recent results for searches for supersymmetric (SUSY) particles. The searches used proton-proton collisions at sqrt{s} = 13 TeV, and involved final states including jets, missing transverse momentum, light leptons as well as long-lived particle signatures.

  4. The electromagnetic calorimeter of the CMS experiment

    CERN Document Server

    Diemoz, M

    2003-01-01

    The electromagnetic calorimeter of the CMS experiment is made of about 80000 lead tungstate scintillating crystals. This project aims to achieve an extreme precision in photons and electrons energy measurement. General motivations, main technical challenges and key points in energy resolution will be discussed in the following.

  5. The Electromagnetic Calorimeter of the CMS Experiment

    CERN Document Server

    Longo, Egidio

    2006-01-01

    The Electromagnetic Calorimeter of the CMS experiment has been designed to achieve an extreme precision in photon and electron energy measurements at LHC. The status of the project will be discussed, together with recent results on performances of final components in beam tests.

  6. Commissioning of the CMS High Level Trigger

    CERN Document Server

    Agostino, Lorenzo; Beccati, Barbara; Behrens, Ulf; Berryhil, Jeffrey; Biery, Kurt; Bose, Tulika; Brett, Angela; Branson, James; Cano, Eric; Cheung, Harry; Ciganek, Marek; Cittolin, Sergio; Coarasa, Jose Antonio; Dahmes, Bryan; Deldicque, Christian; Dusinberre, Elizabeth; Erhan, Samim; Gigi, Dominique; Glege, Frank; Gomez-Reino, Robert; Gutleber, Johannes; Hatton, Derek; Laurens, Jean-Francois; Loizides, Constantin; Ma, Frank; Meijers, Frans; Meschi, Emilio; Meyer, Andreas; Mommsen, Remigius K; Moser, Roland; O'Dell, Vivian; Oh, Alexander; Orsini, Luciano; Patras, Vaios; Paus, Christoph; Petrucci, Andrea; Pieri, Marco; Racz, Attila; Sakulin, Hannes; Sani, Matteo; Schieferdeckerd, Philipp; Schwick, Christoph; Serrano Margaleff, Josep Francesc; Shpakov, Dennis; Simon, Sean; Sumorok, Konstanty; Sungho Yoon, Andre; Wittich, Peter; Zanetti, Marco

    2009-01-01

    The CMS experiment will collect data from the proton-proton collisions delivered by the Large Hadron Collider (LHC) at a centre-of-mass energy up to 14 TeV. The CMS trigger system is designed to cope with unprecedented luminosities and LHC bunch-crossing rates up to 40 MHz. The unique CMS trigger architecture only employs two trigger levels. The Level-1 trigger is implemented using custom electronics, while the High Level Trigger (HLT) is based on software algorithms running on a large cluster of commercial processors, the Event Filter Farm. We present the major functionalities of the CMS High Level Trigger system as of the starting of LHC beams operations in September 2008. The validation of the HLT system in the online environment with Monte Carlo simulated data and its commissioning during cosmic rays data taking campaigns are discussed in detail. We conclude with the description of the HLT operations with the first circulating LHC beams before the incident occurred the 19th September 2008.

  7. The CMS Beam Halo Monitor Detector System

    CERN Document Server

    Stifter, Kelly

    2015-01-01

    A new Beam Halo Monitor (BHM) detector system has been installed in the CMS cavern to measure the machine-induced background (MIB) from the LHC. This background originates from interactions of the LHC beam halo with the final set of collimators before the CMS experiment and from beam gas interactions. The BHM detector uses the directional nature of Cherenkov radiation and event timing to select particles coming from the direction of the beam and to suppress those originating from the interaction point. It consists of 40 quartz rods, placed on each side of the CMS detector, coupled to UV sensitive PMTs. For each bunch crossing the PMT signal is digitized by a charge integrating ASIC and the arrival time of the signal is recorded. The data are processed in real time to yield a precise measurement of per-bunch-crossing background rate. This measurement is made available to CMS and the LHC, to provide real-time feedback on the beam quality and to improve the efficiency of data taking. Here, I present the detector...

  8. The CMS Beam Halo Monitor Detector System

    CERN Document Server

    Stifter, Kelly Marie

    2015-01-01

    A new Beam Halo Monitor (BHM) detector system has been installed in the CMS cavern to measure the machine-induced background (MIB) from the LHC. This background originates from interactions of the LHC beam halo with the final set of collimators before the CMS experiment and from beam gas interactions. The BHM detector uses the directional nature of Cherenkov radiation and event timing to select particles coming from the direction of the beam and to supress those originating from the interaction point. It consists of 40 quartz rods, placed on each side of the CMS detector, coupled to UV sensitive PMTs. For each bunch crossing the PMT signal is digitized by a charge integrating ASIC and the arrival time of the signal is recorded. The data are processed in real time to yield a precise measurement of per-bunch-crossing background rate. This measurement is made available to CMS and the LHC, to provide real-time feedback on the beam quality and to improve the efficiency of data taking. In this talk we will descri...

  9. The CMS Beam Halo Monitor Detector System

    CERN Document Server

    CMS Collaboration

    2015-01-01

    A new Beam Halo Monitor (BHM) detector system has been installed in the CMS cavern to measure the machine-induced background (MIB) from the LHC. This background originates from interactions of the LHC beam halo with the final set of collimators before the CMS experiment and from beam gas interactions. The BHM detector uses the directional nature of Cherenkov radiation and event timing to select particles coming from the direction of the beam and to suppress those originating from the interaction point. It consists of 40 quartz rods, placed on each side of the CMS detector, coupled to UV sensitive PMTs. For each bunch crossing the PMT signal is digitized by a charge integrating ASIC and the arrival time of the signal is recorded. The data are processed in real time to yield a precise measurement of per-bunch-crossing background rate. This measurement is made available to CMS and the LHC, to provide real-time feedback on the beam quality and to improve the efficiency of data taking. In this talk we will describ...

  10. CMS Observes Single Top-Quark

    CERN Multimedia

    2011-01-01

      One of the many excellent results harvested by CMS from 2010 data. (Figure shows events vs cosine of the angle between lepton and light jets in t rest-frame.)   If you have any comments / suggestions please contact the editors: Marzena Lapka (marzena.lapka@cern.ch) and Achintya Rao (achintya.rao@cern.ch)  

  11. CMS and ATLAS honour their suppliers

    CERN Multimedia

    2001-01-01

    In order to motivate the hundreds of companies building their detectors, the CMS and ATLAS collaborations have recently been handing out awards of excellence to their top suppliers. At its second ceremony of this kind, CMS honoured four of its suppliers, while ATLAS for the first time paid tribute to two of its contractors. The atmosphere in the Council Chamber was festive rather than formal at the start of CMS week on Monday 5 March. Before embarking upon a long series of seminars and presentations, the Collaboration held its second awards ceremony to honour its top suppliers. By paying tribute to the exceptional efforts of certain suppliers, the Collaboration's aim is to motivate all the firms, some 500 in total, taking part in the experiment's construction. The CMS Awards panel thus singles out contractors who have not only provided full satisfaction in terms of compliance with specifications, quality and deadlines, but have in addition provided original solutions to delicate problems. Four firms came away...

  12. CMS has a heart of pixels

    CERN Multimedia

    2003-01-01

    In the immediate vicinity of the collision point, CMS will be equipped with pixel detectors consisting of no fewer than 50 million pixels measuring 150 microns along each side. Each of the pixels, which receive the signal, is connected to its own electronic circuit by a tiny sphere (seen here in the electron microscope image) measuring 15 to 20 microns in diameter.

  13. R & D for the CMS silicon tracker

    CERN Document Server

    Feld, L; Angarano, M M; Azzi, P; Babucci, E; Bacchetta, N; Bader, A J; Bagliesi, G; Barr, A J; Bartalini, P; Basti, A; Biggeri, U; Bilei, G M; Bisello, D; Boemi, D; Bosi, F; Borrello, L; Bozzi, C; Braibant, S; Breuker, Horst; Bruzzi, Mara; Candelori, A; Caner, A; Castaldi, R; Castro, A; Catacchini, E; Checcucci, B; Ciampolini, P; Civinini, C; Creanza, D; D'Alessandro, R; Da Rold, M; Demaria, N; De Palma, M; Dell'Orso, R; Della Marina, R; Dutta, S; Eklund, C; Peisert, Anna; Fiore, L; Focardi, E; French, M; Freudenreich, Klaus; Fürtjes, A; Giassi, A; Giraldo, A; Glessing, W D; Gu, W H; Hall, G; Hammarström, R; Hebbeker, T; Honkanen, J A; Hrubec, Josef; Huhtinen, M; Kaminski, A; Karimäki, V; Kellogg, R G; König, S J; Krammer, Manfred; Lariccia, P; Lenzi, M; Loreti, M; Lübelsmeyer, K; Lustermann, W; Mättig, P; Maggi, G; Mannelli, M; Mantovani, G C; Marchioro, A; Mariotti, C; Martignon, G; McEvoy, B; Meschini, M; Messineo, A; My, S; Paccagnella, A; Palla, Fabrizio; Pandoulas, D; Parrini, G; Passeri, D; Pieri, M; Piperov, S; Potenza, R; Raffaelli, F; Raso, G; Raymond, M; Schmitt, B; Selvaggi, G; Servoli, L; Sguazzoni, G; Siedling, R; Silvestris, L; Skog, K; Starodumov, Andrei; Stavitski, I; Stefanini, G; Tempesta, P; Tonelli, G; Tricomi, A; Tuuva, T; Vannini, C; Verdini, P G; Viertel, Gert M; Xie, Z; Wang, Y; Watts, S; Wittmer, B

    1999-01-01

    The CMS silicon tracker, consisting of about 70 m/sup 2/ of silicon microstrip devices, has to be operated for at least 10 years in a harsh radiation environment. The main implications of this environment on the detector design are summarized and an overview of the expected performance is given. (2 refs).

  14. CMS has a heart of pixels

    CERN Multimedia

    2003-01-01

    At the core of CMS, particles will come into contact with tiny detector components, known as pixels, which are almost invisible to the naked eye. With these elementary cells measuring a mere 150 microns (or about 1/10 of a millimetre) along each side, a real technological leap has been made.

  15. Assembly of the CMS hadronic calorimeter

    CERN Document Server

    Maximilien Brice

    2004-01-01

    The hadronic calorimeter is assembled on the end-cap of the CMS detector in the assembly hall. Hadronic calorimeters measure the energy of particles that interact via the strong force, called hadrons. The detectors are made in a sandwich-like structure where these scintillator tiles are placed between metal sheets.

  16. Status and recent highlights from CMS

    CERN Document Server

    Van Mulders, Petra Karel Ann

    2016-01-01

    The LHC Run-2 at a center of mass energy of 13 TeV started in 2015. This proceeding highlights some of the physics results based on the collision data collected by the CMS experiment in 2015. In addition, the status and readiness of the experiment for the collisions in 2016 are discussed with concrete examples on the object reconstruction performance.

  17. Members of the CMS crystal assembly team

    CERN Multimedia

    Maximilien Brice

    2006-01-01

    From left to right: Hervé Cornet, Dominique Deyrail, Olivier Teller, Etiennette Auffray, Igor Tarasov, Michel Lebeau, Guy Chevenier, Norbert Frank and Rachid Kerkach. Below: one of the systems used to assembly the crystals in modules for the CMS electromagnetic calorimeter.

  18. Visualizing CMS muon drift tubes’ currents

    CERN Document Server

    Hamarik, Lauri

    2015-01-01

    This report documents my work as a summer student in the CMS DT group at CERN in July and August of 2015. During that time, I have participated in relocating DT monitoring experiment to GIF++ site and creating software to analyze drift tubes’ wires current dependence on luminosity and radioactivity.

  19. An overview of CMS central hadron calorimeter

    CERN Document Server

    Katta, S

    2002-01-01

    The central hadron calorimeter for CMS detector is a sampling calorimeter with active medium as scintillator plates interleaved with brass absorber plates. It covers the central pseudorapidity region (¿ eta ¿<3.0). The design and construction aspects are reported. The status of construction and assembly of various subdetectors of HCAL are presented. (5 refs).

  20. Minimum Bias and Underlying Event at CMS

    CERN Document Server

    Fano, Livio

    2006-01-01

    The prospects of measuring minimum bias collisions (MB) and studying the underlying event (UE) at CMS are discussed. Two methods are described. The first is based on the measurement of charged tracks in the transverse region with respect to a charge-particle jet. The second technique relies on the selection of muon-pair events from Drell-Yan process.