WorldWideScience

Sample records for barrel calorimeter performance

  1. CMD-2 barrel calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Aulchenko, V.M. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Baibusinov, B.O. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Bondar, A.E. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Kuzmin, A.S. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Leontiev, L.A. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Okhapkin, V.S. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Pestsov, L.V. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Smakhtin, V.P. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Sukhanov, A.I. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation)); Shwartz, B.A. (Budker Inst. of Nuclear Physics, Novosibirsk (Russian Federation))

    1993-11-15

    The barrel calorimeter of the CMD-2 detector for the VEPP-2M collider is described. The calorimeter contains 892 CsI crystals read by PM tubes. Operation with it during the last year demonstrated good performance as well as energy and spatial resolution which are close to the corresponding project values. (orig.)

  2. Performance of the ATLAS electromagnetic calorimeter barrel module 0

    CERN Document Server

    Aubert, Bernard; Alexa, C; Astesan, F; Augé, E; Aulchenko, V M; Ballansat, J; Barreiro, F; Barrillon, P; Battistoni, G; Bazan, A; Beaugiraud, B; Beck-Hansen, J; Belhorma, B; Belorgey, J; Belymam, A; Ben-Mansour, A; Benchekroun, D; Benchouk, C; Bernard, R; Bertoli, W; Boniface, J; Bonivento, W; Bourdarios, C; Bremer, J; Breton, D; Bán, J; Camard, A; Canton, B; Carminati, L; Cartiglia, N; Cavalli, D; Chalifour, M; Chekhtman, A; Chen, H; Cherkaoui, R; Chevalley, J L; Chollet, F; Citterio, M; Clark, A; Cleland, W; Clément, C; Colas, Jacques; Collot, J; Costa, G; Cros, P; Cunitz, H; de Saintignon, P; Del Peso, J; Delebecque, P; Delmastro, M; Di Ciaccio, Lucia; Dinkespiler, B; Djama, F; Dodd, J; Driouichi, C; Dumont-Dayot, N; Duval, P Y; Dzahini, D; Efthymiopoulos, I; Egdemir, J; El-Kacimi, M; El-Mouahhidi, Y; Engelmann, R; Ernwein, J; Falleau, I; Fanti, M; Farrell, J; Fassnacht, P; Ferrari, A; Fichet, S; Fournier, D; Gallin-Martel, M L; Gara, A; García, G; Gaumer, O; Ghazlane, H; Ghez, P; Gianotti, F; Girard, C; Gordon, H; Gouanère, M; Guilhem, G; Hackenburg, B; Hakimi, M; Hassani, S; Henry-Coüannier, F; Hervás, L; Hinz, L; Hoffman, A; Hoffman, J; Hostachy, J Y; Hoummada, A; Hubaut, F; Idrissi, A; Imbault, D; Jacquier, Y; Jérémie, A; Jevaud, M; Jézéquel, S; Kambara, H; Karst, P; Kazanin, V; Kierstead, J A; Kolachev, G M; Kordas, K; de La Taille, C; Labarga, L; Lacour, D; Lafaye, R; Laforge, B; Lanni, F; Le Coroller, A; Le Dortz, O; Le Maner, C; Le Van-Suu, A; Le Flour, T; Leite, M; Leltchouk, M; Lesueur, J; Lissauer, D; Lund-Jensen, B; Lundqvist, J M; Ma, H; Macé, G; Makowiecki, D S; Malychev, V; Mandelli, L; Mansoulié, B; Marin, C P; Martin, D; Martin, L; Martin, O; Martin, P; Maslennikov, A L; Massol, N; Mazzanti, M; McCarthy, R; McDonald, J; Megner, L; Merkel, B; Mirea, A; Moneta, L; Monnier, E; Moynot, M; Muraz, J F; Nagy, E; Negroni, S; Neukermans, L; Nicod, D; Nikolic-Audit, I; Noppe, J M; Ohlsson-Malek, F; Olivier, C; Orsini, F; Pailler, P; Parrour, G; Parsons, J A; Pearce, M; Perini, L; Perrodo, P; Perrot, G; Pétroff, P; Poggioli, Luc; Pospelov, G E; Pralavorio, Pascal; Prast, J; Przysiezniak, H; Puzo, P; Radeka, V; Rahm, David Charles; Rajagopalan, S; Raymond, M; Renardy, J F; Repetti, B; Rescia, S; Resconi, S; Riccadona, X; Richer, J P; Rijssenbeek, M; Rodier, S; Rossel, F; Rousseau, D; Rydström, S; Saboumazrag, S; Sauvage, D; Sauvage, G; Schilly, P; Schwemling, P; Schwindling, J; Seguin-Moreau, N; Seidl, W; Seman, M; Serin, L; Shousharo, A; Simion, S; Sippach, W; Snopkov, R; Steffens, J; Stroynowski, R; Stumer, I; Taguet, J P; Takai, H; Talyshev, A A; Tartarelli, F; Teiger, J; Thion, J; Tikhonov, Yu A; Tisserant, S; Tocut, V; Tóth, J; Veillet, J J; Vossebeld, Joost Herman; Vuillemin, V; Wielers, M; Willis, W J; Wingerter-Seez, I; Ye, J; Yip, K; Zerwas, D; Zitoun, R; Zolnierowski, Y

    2003-01-01

    The construction and performance of the barrel pre-series module 0 of the future ATLAS electromagnetic calorimeter at the LHC is described. The signal reconstruction and performance of ATLAS-like electronics has been studied. The signal to noise ratio for muons has been found to be 7.11+-0.07. An energy resolution of better than 9.5% GeV^1/2/sqrt{E} (sampling term) has been obtained with electron beams of up to 245GeV. The uniformity of the response to electrons in an area of Delta_eta x Delta_phi = 1.2 x 0.075 has been measured to be better than 0.8%.

  3. Performance of the ATLAS electromagnetic calorimeter barrel module 0

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.; Ballansat, J.; Bazan, A.; Beaugiraud, B.; Boniface, J.; Chollet, F.; Colas, J.; Delebecque, P.; Di Ciaccio, L.; Dumont-Dayot, N.; El Kacimi, M.; Gaumer, O.; Ghez, P.; Girard, C.; Gouanere, M.; Kambara, H.; Jeremie, A.; Jezequel, S.; Lafaye, R.; Leflour, T.; Le Maner, C.; Lesueur, J.; Massol, N.; Moynot, M.; Neukermans, L.; Perrodo, P.; Perrot, G.; Poggioli, L.; Prast, J.; Przysiezniak, H.; Riccadona, X.; Sauvage, G.; Thion, J.; Wingerter-Seez, I.; Zitoun, R.; Zolnierowski, Y.; Chen, H.; Citterio, M.; Farrell, J.; Gordon, H.; Hackenburg, B.; Hoffman, A.; Kierstead, J.; Lanni, F.; Leite, M.; Lissauer, D.; Ma, H.; Makowiecki, D.; Radeka, V.; Rahm, D.; Rajagopalan, S.; Rescia, S.; Stumer, I.; Takai, H.; Yip, K.; Benchekroun, D.; Driouichi, C.; Hoummada, A.; Hakimi, M.; Stroynowski, R.; Ye, J.; Beck Hansen, J.; Belymam, A.; Bremer, J.; Chevalley, J.L.; Fassnacht, P.; Gianotti, F.; Hervas, L.; Marin, C.P.; Pailler, P.; Schilly, P.; Seidl, W.; Vossebeld, J.; Vuillemin, V.; Clark, A.; Efthymiopoulos, I.; Moneta, L.; Belhorma, B.; Collot, J.; Saintignon, P. de; Dzahini, D.; Ferrari, A.; Gallin-Martel, M.L.; Hostachy, J.Y.; Martin, P.; Muraz, J.F.; Ohlsson-Malek, F.; Saboumazrag, S.; Ban, J.; Cartiglia, N.; Cunitz, H.; Dodd, J.; Gara, A.; Leltchouk, M.; Negroni, S.; Parsons, J.A.; Seman, M.; Simion, S.; Sippach, W.; Willis, W.; Barreiro, F.; Garcia, G.; Labarga, L.; Rodier, S.; Peso, J. del; Alexa, C.; Barrillon, P.; Benchouk, C.; Chekhtman, A.; Dinkespiler, B.; Djama, F.; Duval, P.Y.; Henry-Couannier, F.; Hinz, L.; Jevaud, M.; Karst, P.; Le Van Suu, A.; Martin, L.; Martin, O.; Mirea, A.; Monnier, E.; Nagy, E.; Nicod, D.; Olivier, C.; Pralavorio, P.; Repetti, B.; Raymond, M.; Sauvage, D.; Tisserant, S.; Toth, J.; Wielers, M.; Battistoni, G.; Bonivento, W.; Carminati, L.; Cavalli, D.; Costa, G.; Delmastro, M.; Fanti, M.; Mandelli, L.; Mazzanti, M.; Perini, L.; Resconi, S.; Tartarelli, G.F.; Aulchenko, V.; Kazanin, V.; Kolachev, G.; Malyshev, V.J. [and others

    2003-03-11

    The construction and performance of the barrel pre-series module 0 of the future ATLAS electromagnetic calorimeter at the LHC is described. The signal reconstruction and performance of ATLAS-like electronics has been studied. The signal to noise ratio for muons has been found to be 7.11{+-}0.07. An energy resolution of better than 9.5% GeV{sup 1/2}/{radical}E (sampling term) has been obtained with electron beams of up to 245 GeV. The uniformity of the response to electrons in an area of {delta}{eta}x{delta}phi=1.2x0.075 has been measured to be better than 0.8%.

  4. Performance of the ATLAS electromagnetic calorimeter barrel module 0

    Science.gov (United States)

    Aubert, B.; Ballansat, J.; Bazan, A.; Beaugiraud, B.; Boniface, J.; Chollet, F.; Colas, J.; Delebecque, P.; di Ciaccio, L.; Dumont-Dayot, N.; El Kacimi, M.; Gaumer, O.; Ghez, P.; Girard, C.; Gouanère, M.; Kambara, H.; Jérémie, A.; Jézéquel, S.; Lafaye, R.; Leflour, T.; Le Maner, C.; Lesueur, J.; Massol, N.; Moynot, M.; Neukermans, L.; Perrodo, P.; Perrot, G.; Poggioli, L.; Prast, J.; Przysiezniak, H.; Riccadona, X.; Sauvage, G.; Thion, J.; Wingerter-Seez, I.; Zitoun, R.; Zolnierowski, Y.; Chen, H.; Citterio, M.; Farrell, J.; Gordon, H.; Hackenburg, B.; Hoffman, A.; Kierstead, J.; Lanni, F.; Leite, M.; Lissauer, D.; Ma, H.; Makowiecki, D.; Radeka, V.; Rahm, D.; Rajagopalan, S.; Rescia, S.; Stumer, I.; Takai, H.; Yip, K.; Benchekroun, D.; Driouichi, C.; Hoummada, A.; Hakimi, M.; Stroynowski, R.; Ye, J.; Beck Hansen, J.; Belymam, A.; Bremer, J.; Chevalley, J. L.; Fassnacht, P.; Gianotti, F.; Hervas, L.; Marin, C. P.; Pailler, P.; Schilly, P.; Seidl, W.; Vossebeld, J.; Vuillemin, V.; Clark, A.; Efthymiopoulos, I.; Moneta, L.; Belhorma, B.; Collot, J.; de Saintignon, P.; Dzahini, D.; Ferrari, A.; Gallin-Martel, M. L.; Hostachy, J. Y.; Martin, P.; Muraz, J. F.; Ohlsson-Malek, F.; Saboumazrag, S.; Ban, J.; Cartiglia, N.; Cunitz, H.; Dodd, J.; Gara, A.; Leltchouk, M.; Negroni, S.; Parsons, J. A.; Seman, M.; Simion, S.; Sippach, W.; Willis, W.; Barreiro, F.; Garcia, G.; Labarga, L.; Rodier, S.; Del Peso, J.; Alexa, C.; Barrillon, P.; Benchouk, C.; Chekhtman, A.; Dinkespiler, B.; Djama, F.; Duval, P. Y.; Henry-Couannier, F.; Hinz, L.; Jevaud, M.; Karst, P.; Le van Suu, A.; Martin, L.; Martin, O.; Mirea, A.; Monnier, E.; Nagy, E.; Nicod, D.; Olivier, C.; Pralavorio, P.; Repetti, B.; Raymond, M.; Sauvage, D.; Tisserant, S.; Toth, J.; Wielers, M.; Battistoni, G.; Bonivento, W.; Carminati, L.; Cavalli, D.; Costa, G.; Delmastro, M.; Fanti, M.; Mandelli, L.; Mazzanti, M.; Perini, L.; Resconi, S.; Tartarelli, G. F.; Aulchenko, V.; Kazanin, V.; Kolachev, G.; Malyshev, V.; Maslennikov, A.; Pospelov, G.; Snopkov, R.; Shousharo, A.; Talyshev, A.; Tikhonov, Yu.; Augé, E.; Bourdarios, C.; Breton, D.; Cros, P.; de La Taille, C.; Falleau, I.; Fournier, D.; Guilhem, G.; Hassani, S.; Jacquier, Y.; Kordas, K.; Macé, G.; Merkel, B.; Noppe, J. M.; Parrour, G.; Pétroff, P.; Puzo, P.; Richer, J. P.; Rousseau, D.; Seguin-Moreau, N.; Serin, L.; Tocut, V.; Veillet, J. J.; Zerwas, D.; Astesan, F.; Bertoli, W.; Camard, A.; Canton, B.; Fichet, S.; Hubaut, F.; Imbault, D.; Lacour, D.; Laforge, B.; Le Dortz, O.; Martin, D.; Nikolic-Audit, I.; Orsini, F.; Rossel, F.; Schwemling, P.; Cleland, W.; McDonald, J.; Abouelouafa, E. M.; Ben Mansour, A.; Cherkaoui, R.; El Mouahhidi, Y.; Ghazlane, H.; Idrissi, A.; Belorgey, J.; Bernard, R.; Chalifour, M.; Le Coroller, A.; Ernwein, J.; Mansoulié, B.; Renardy, J. F.; Schwindling, J.; Taguet, J.-P.; Teiger, J.; Clément, C.; Lund-Jensen, B.; Lundqvist, J.; Megner, L.; Pearce, M.; Rydstrom, S.; Egdemir, J.; Engelmann, R.; Hoffman, J.; McCarthy, R.; Rijssenbeek, M.; Steffens, J.; Atlas Electromagnetic Liquid Argon Calorimeter Group

    2003-03-01

    The construction and performance of the barrel pre-series module 0 of the future ATLAS electromagnetic calorimeter at the LHC is described. The signal reconstruction and performance of ATLAS-like electronics has been studied. The signal to noise ratio for muons has been found to be 7.11±0.07. An energy resolution of better than 9.5% GeV1/2/ E (sampling term) has been obtained with electron beams of up to 245 GeV. The uniformity of the response to electrons in an area of Δ η×Δ φ=1.2×0.075 has been measured to be better than 0.8%.

  5. Performance analysis for the CALIFA Barrel calorimeter of the R{sup 3}B experiment

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez-Pol, H., E-mail: hector.alvarez@usc.es [Dpt. de Física de Partículas, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela (Spain); Ashwood, N. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Aumann, T. [Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt (Germany); GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt (Germany); Bertini, D. [GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt (Germany); Cabanelas, P. [Dpt. de Física de Partículas, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela (Spain); Casarejos, E. [Universidade de Vigo, E-36310 Vigo (Spain); Cederkall, J. [Department of Physics, Lund University, SE 221 00 Lund (Sweden); Cortina-Gil, D.; Díaz Fernández, P.; Duran, I. [Dpt. de Física de Partículas, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela (Spain); Fiori, E. [ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt (Germany); Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main (Germany); Galaviz, D. [Centro de Fsica Nuclear da Universidade de Lisboa, 1649-003 Lisbon (Portugal); Labiche, M. [STFC Daresbury Laboratory, Warrington WA4 4AD (United Kingdom); Nacher, E. [Instituto de Estructura de la Materia CSIC, Madrid (Spain); Pietras, B. [Dpt. de Física de Partículas, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela (Spain); and others

    2014-12-11

    The CALIFA calorimeter is an advanced detector for gamma rays and light charged particles, accordingly optimized for the demanding requirements of the physics programme proposed for the R{sup 3}B facility at FAIR. The multipurpose character of CALIFA is required to fulfil challenging demands in energy resolution (5–6% at 1 MeV for gamma rays) and efficiency. Charged particles, e.g. protons of energies up to 320 MeV in the Barrel section, should also be identified with an energy resolution better to 1%. CALIFA is divided into two well-separated sections: a “Forward EndCap” and a cylindrical “Barrel” covering an angular range from 43.2° to 140.3°. The Barrel section, based on long CsI(Tl) pyramidal frustum crystals coupled to large area avalanche photodiodes (LAAPDs), attains the requested high efficiency for calorimetric purposes. The construction of the CALIFA Demonstrator, comprising 20% of the total detector, has already been initiated, and commissioning experiments are expected for 2014. The assessment of the capabilities and expected performance of the detector elements is a crucial step in their design, along with the prototypes evaluation. For this purpose, the Barrel geometry has been carefully implemented in the simulation package R3BRoot, including easily variable thicknesses of crystal wrapping and carbon fibre supports. A complete characterization of the calorimeter response (including efficiency, resolution, evaluation of energy and reconstruction losses) under different working conditions, with several physics cases selected to probe the detector performance over a wide range of applications, has been undertaken. Prototypes of different sections of the CALIFA Barrel have been modeled and their responses have been evaluated and compared with the experimental results. The present paper summarizes the outcome of the simulation campaign for the entire Barrel section and for the corresponding prototypes tested at different European installations.

  6. Design, performance, and calibration of CMS hadron-barrel calorimeter wedges

    Energy Technology Data Exchange (ETDEWEB)

    Abdullin, S. [Fermi National Accelerator Lab., Batavia, IL (United States)]|[Univ. of Maryland, College Park, MD (United States); Abramov, V.; Goncharov, P.; Khmelnikov, A.; Korablev, A.; Korneev, Y.; Krinitsyn, A.; Kryshkin, V.; Lukanin, V.; Pikalov, V.; Ryazanov, A.; Talov, V.; Turchanovich, L.; Volkov, A. [IHEP, Protvino (Russian Federation); Acharya, B.; Banerjee, S.; Banerjee, S.; Chendvankar, S.; Dugad, S.; Kalmani, S.; Katta, S.; Mazumdar, K.; Mondal, N.; Nagaraj, P.; Patil, M.; Reddy, L.; Satyanarayana, B.; Sudhakar, K.; Verma, P. [Tata Inst. of Fundamental Research, Mumbai (India); Adams, M.; Burchesky, K.; Qian, W. [Univ. of Illinois at Chicago, Chicago, IL (United States); Akchurin, N.; Carrell, K.; Guemues, K.; Thomas, R. [Texas Tech Univ., Dept. of Physics, Lubbock, TX (United States); Akgun, U.; Ayan, S.; Duru, F.; Merlo, J.P.; Mestvirishvili, A.; Miller, M.; Norbeck, E.; Olson, J.; Onel, Y.; Schmidt, I. [Univ. of Iowa, Iowa City, IA (United States); Anderson, E.W.; Hauptman, J. [Iowa State Univ., Ames, IA (United States); Antchev, G.; Hazen, E.; Lawlor, C.; Machado, E.; Posch, C.; Rohlf, J.; Wu, S.X. [Boston Univ., Boston, MA (United States); Aydin, S.; Dumanoglu, I.; Eskut, E.; Kayis-Topaksu, A.; Polatoz, A.; Onengut, G.; Ozdes-Koca, N. [Cukurova Univ., Adana (Turkey); Baarmand, M.; Ralich, R.; Vodopiyanov, I. [Florida Inst. of Technology, Melbourne, FL (United States); Baden, D.; Bard, R.; Eno, S.; Grassi, T.; Jarvis, C.; Kellogg, R.; Kunori, S.; Skuja, A. [Univ. of Maryland, College Park, MD (United States); Barnes, V.; Laasanen, A.; Pompos, A. [Purdue Univ., West Lafayette, IN (United States); Bawa, H.; Beri, S.; Bhatnagar, V.; Kaur, M.; Kohli, J.; Kumar, A.; Singh, J. [Panjab Univ., Chandigarh (India); Baiatian, G.; Sirunyan, A. [Yerevan Physics Inst., Yerevan (Armenia); Bencze, G.; Vesztergombi, G.; Zalan, P. [KFKI-RMKI, Research Inst. for Particle and Nuclear Physics, Budapest (Hungary)] [and others

    2008-05-15

    Extensive measurements have been made with pions, electrons and muons on four production wedges of the compact muon solenoid (CMS) hadron barrel (HB) calorimeter in the H2 beam line at CERN with particle momenta varying from 20 to 300 GeV/c. The time structure of the events was measured with the full chain of preproduction front-end electronics running at 34 MHz. Moving-wire radioactive source data were also collected for all scintillator layers in the HB. The energy dependent time slewing effect was measured and tuned for optimal performance. (orig.)

  7. Performance of Prototypes for the Barrel Part of the ANDA Electromagnetic Calorimeter

    Science.gov (United States)

    Rosenbaum, Christoph; Diehl, S.; Dormenev, V.; Drexler, P.; Kavatsyuk, M.; Kuske, T.; Nazarenko, S.; Novotny, R.; Rosier, P.; Ryazantsev, A.; Wieczorek, P.; Wilms, A.; Zaunick, H.-G.; P¯ANDA Collaboration

    2016-08-01

    The performance of the most recent prototypes of the ANDA barrel electromagnetic calorimeter (EMC) will be compared. The first large scale prototype PROTO60 was designed to test the performance of the improved tapered lead tungstate crystals (PWO-II). The PROTO60 which consists of 6 × 10 crystals was tested at various accelerator facilities over the complete envisaged energy range fulfilling the requirements of the TDR of the ANDA EMC in terms of energy, position and time resolution. To realize the final barrel geometry and to test the final front end electronics, a second prototype PROTO120 has been constructed. It represents a larger section of a barrel slice, containing the most tapered crystals and the close to final components for the ANDA EMC. The performance of both prototypes will be compared with a focus on the analysis procedure including the signal extraction, noise rejection, calibration and the energy resolution. In addition, the influence of the non-uniformity of the crystal on the energy resolution will be discussed.

  8. Design, Performance, and Calibration of CMS Hadron-Barrel Calorimeter Wedges

    CERN Document Server

    Baiatian, G; Emeliantchik, Igor; Massolov, V; Shumeiko, Nikolai; Stefanovich, R; Damgov, Jordan; Dimitrov, Lubomir; Genchev, Vladimir; Piperov, Stefan; Vankov, Ivan; Litov, Leander; Bencze, Gyorgy; Vesztergombi, Gyorgy; Zálán, Peter; Bawa, Harinder Singh; Beri, Suman Bala; Bhatnagar, Vipin; Kaur, Manjit; Kohli, Jatinder Mohan; Kumar, Arun; Singh, Jas Bir; Acharya, Bannaje Sripathi; Banerjee, Sunanda; Banerjee, Sudeshna; Chendvankar, Sanjay; Dugad, Shashikant; Kalmani, Suresh Devendrappa; Katta, S; Mazumdar, Kajari; Mondal, Naba Kumar; Nagaraj, P; Patil, Mandakini Ravindra; Reddy, L; Satyanarayana, B; Sudhakar, Katta; Verma, Piyush; Paktinat, S; Golutvin, Igor; Kalagin, Vladimir; Kosarev, Ivan; Mescheryakov, G; Sergeyev, S; Smirnov, Vitaly; Volodko, Anton; Zarubin, Anatoli; Gavrilov, Vladimir; Gershtein, Yuri; Kaftanov, Vitali; Kisselevich, I; Kolossov, V; Krokhotin, Andrey; Kuleshov, Sergey; Litvintsev, Dmitri; Stolin, Viatcheslav; Ulyanov, A; Demianov, A; Gribushin, Andrey; Kodolova, Olga; Petrushanko, Sergey; Sarycheva, Ludmila; Vardanyan, Irina; Yershov, A; Abramov, Victor; Goncharov, Petr; Khmelnikov, Alexander; Korablev, Andrey; Korneev, Yury; Krinitsyn, Alexander; Kryshkin, V; Lukanin, Vladimir; Pikalov, Vladimir; Ryazanov, Anton; Talov, Vladimir; Turchanovich, L; Volkov, Alexey; Camporesi, Tiziano; De Visser, Theo; Vlassov, E; Aydin, Sezgin; Dumanoglu, Isa; Eskut, Eda; Kayis-Topaksu, A; Kuzucu-Polatoz, A; Onengüt, G; Ozdes-Koca, N; Cankocak, Kerem; Ozok, Ferhat; Serin-Zeyrek, M; Sever, Ramazan; Zeyrek, Mehmet; Gülmez, Erhan; Isiksal, Engin; Kaya, Mithat; Ozkorucuklu, Suat; Levchuk, Leonid; Sorokin, Pavel; Grinev, B; Lubinsky, V; Senchishin, V; Anderson, E Walter; Hauptman, John M; Elias, John E; Elvira, D; Freeman, Jim; Green, Dan; Lazic, Dragoslav; Los, Serguei; O'Dell, Vivian; Ronzhin, Anatoly; Suzuki, Ichiro; Vidal, Richard; Whitmore, Juliana; Antchev, Georgy; Hazen, Eric; Lawlor, C; Machado, Emanuel; Posch, C; Rohlf, James; Wu, Shouxiang; Adams, Mark Raymond; Burchesky, Kyle; Qiang, W; Abdullin, Salavat; Baden, Drew; Bard, Robert; Eno, Sarah Catherine; Grassi, Tullio; Jarvis, Chad; Kellogg, Richard G; Kunori, Shuichi; Skuja, Andris; Podrasky, V; Sanzeni, Christopher; Winn, Dave; Akgun, Ugur; Ayan, S; Duru, Firdevs; Merlo, Jean-Pierre; Mestvirishvili, Alexi; Miller, Michael; Norbeck, Edwin; Olson, Jonathan; Onel, Yasar; Schmidt, Ianos; Akchurin, Nural; Carrell, Kenneth Wayne; Gumu, K; Thomas, Ray; Baarmand, Marc M; Ralich, Robert; Vodopiyanov, Igor; Cushman, Priscilla; Heering, Arjan Hendrix; Sherwood, Brian; Cremaldi, Lucien Marcus; Reidy, Jim; Sanders, David A; Karmgard, Daniel John; Ruchti, Randy; Fisher, Wade Cameron; Mans, Jeremy; Tully, Christopher; De Barbaro, Pawel; Bodek, Arie; Budd, Howard; Chung, Yeon Sei; Haelen, T; Imboden, Matthias; Hagopian, Sharon; Hagopian, Vasken; Johnson, Kurtis F; Barnes, Virgil E; Laasanen, Alvin T; Pompos, Arnold

    2007-01-01

    Extensive measurements have been made with pions, electrons and muons on four production wedges of the Compact Muon Solenoid (CMS) hadron barrel (HB) calorimeter in the H2 beam line at CERN with particle momenta varying from 20 to 300 GeV/c. Data were taken both with and without a prototype electromagnetic lead tungstate crystal calorimeter (EB) in front of the hadron calorimeter. The time structure of the events was measured with the full chain of preproduction front-end electronics running at 34 MHz. Moving-wire radioactive source data were also collected for all scintillator layers in the HB. These measurements set the absolute calibration of the HB prior to first pp collisions to approximately 4%.

  9. Work on a ATLAS tile calorimeter Barrel

    CERN Multimedia

    Laurent Guiraud

    2000-01-01

    The Tile Calorimeter is designed as one barrel and two extended barrel hadron parts. The calorimeter consists of a cylindrical structure with inner and outer radius of 2280 and 4230 mm respectively. The barrel part is 5640 mm in length along the beam axis, while each of the extended barrel cylinders is 2910 mm long. Each detector cylinder is built of 64 independent wedges along the azimuthal direction. Between the barrel and the extended barrels there is a gap of about 600 mm, which is needed for the Inner Detector and the Liquid Argon cables, electronics and services. The barrel covers the region -1.0barrels cover the region 0.8<|h|<1.7.

  10. Last Few Metres for the Barrel Calorimeter

    CERN Multimedia

    Nyman, T.

    On Friday 4th November, the ATLAS Barrel Calorimeter was moved from its assembly point at the side of the ATLAS cavern to the centre of the toroidal magnet system. The detector was finally aligned, to the precision of within a millimetre, on Wednesday 9th November. The ATLAS installation team, led by Tommi Nyman, after having positioned the Barrel Calorimeter in its final location in the ATLAS experimental cavern UX15. The Barrel Calorimeter which will absorb and measure the energy of photons, electrons and hadrons at the core of the ATLAS detector is 8.6 meters in diameter, 6.8 meters long, and weighs over 1600 Tonnes. It consists of two concentric cylindrical detector elements. The innermost comprises aluminium pressure vessels containing the liquid argon electromagnetic calorimeter and the solenoid magnet. The outermost is an assembly of 64 hadron tile calorimeter sectors. Assembled 18 meters away from its final position, the Barrel Calorimeter was relocated with the help of a railway, which allows ...

  11. The barrel electromagnetic calorimeter on OPAL

    CERN Multimedia

    Patrice Loiez

    1993-01-01

    The two particle beams collide at the centre of this barrel and eject a large number of different particles. The energy of some of these particles will be measured by this electromagnetic calorimeter by absorbing all of the particle's energy. The OPAL detector was used on the LEP accelerator, which ran from 1989 to 2000.

  12. Construction, assembly and tests of the ATLAS electromagnetic barrel calorimeter

    CERN Document Server

    Aubert, B; Colas, Jacques; Delebecque, P; Di Ciaccio, L; El-Kacimi, M; Ghez, P; Girard, C; Gouanère, M; Goujdami, D; Jérémie, A; Jézéquel, S; Lafaye, R; Massol, N; Perrodo, P; Przysiezniak, H; Sauvage, G; Thion, J; Wingerter-Seez, I; Zitoun, R; Zolnierowski, Y; Alforque, R; Chen, H; Farrell, J; Gordon, H; Grandinetti, R; Hackenburg, R W; Hoffmann, A; Kierstead, J A; Köhler, J; Lanni, F; Lissauer, D; Ma, H; Makowiecki, D S; Müller, T; Norton, S; Radeka, V; Rahm, David Charles; Rehak, M; Rajagopalan, S; Rescia, S; Sexton, K; Sondericker, J; Stumer, I; Takai, H; Belymam, A; Benchekroun, D; Driouichi, C; Hoummada, A; Hakimi, M; Knee, Michael; Stroynowski, R; Wakeland, B; Datskov, V I; Drobin, V; Aleksa, Martin; Bremer, J; Carli, T; Chalifour, M; Chevalley, J L; Djama, F; Ema, L; Fabre, C; Fassnacht, P; Gianotti, F; Gonidec, A; Hansen, J B; Hervás, L; Hott, T; Lacaste, C; Marin, C P; Pailler, P; Pleskatch, A; Sauvagey, D; Vandoni, Giovanna; Vuillemin, V; Wilkens, H; Albrand, S; Belhorma, B; Collot, J; de Saintignon, P; Dzahini, D; Ferrari, A; Fulachier, J; Gallin-Martel, M L; Hostachy, J Y; Laborie, G; Ledroit-Guillon, F; Martin, P; Muraz, J F; Ohlsson-Malek, F; Saboumazrag, S; Viret, S; Othegraven, R; Zeitnitz, C; Banfi, D; Carminati, L; Cavalli, D; Citterio, M; Costa, G; Delmastro, M; Fanti, M; Mandelli, L; Mazzanti, M; Tartarelli, F; Augé, E; Baffioni, S; Bonis, J; Bonivento, W; Bourdarios, C; de La Taille, C; Fayard, L; Fournier, D; Guilhem, G; Imbert, P; Iconomidou-Fayard, L; Le Meur, G; Mencik, M; Noppe, J M; Parrour, G; Puzo, P; Rousseau, D; Schaffer, A C; Seguin-Moreau, N; Serin, L; Unal, G; Veillet, J J; Wicek, F; Zerwas, D; Astesan, F; Bertoli, W; Canton, B; Fleuret, F; Imbault, D; Lacour, D; Laforge, B; Schwemling, P; Abouelouafa, M; Ben-Mansour, A; Cherkaoui, R; El-Mouahhidi, Y; Ghazlane, H; Idrissi, A; Bazizi, K; England, D; Glebov, V; Haelen, T; Lobkowicz, F; Slattery, P F; Belorgey, J; Besson, N; Boonekamp, M; Durand, D; Ernwein, J; Mansoulié, B; Molinie, F; Meyer, J P; Perrin, P; Schwindling, J; Taguet, J P; Zaccone, Henri; Lund-Jensen, B; Rydström, S; Tayalati, Y; Botchev, B; Finocchiaro, G; Hoffman, J; McCarthy, R L; Rijssenbeek, M; Steffens, J; Zdrazil, M; Braun, H M

    2006-01-01

    The construction and assembly of the two half barrels of the ATLAS central electromagnetic calorimeter and their insertion into the barrel cryostat are described. The results of the qualification tests of the calorimeter before installation in the LHC ATLAS pit are given.

  13. First physics pulses in the Barrel Electromagnetic Calorimeter with cosmics

    CERN Multimedia

    Laurent Serin

    2006-01-01

    The electromagnetic barrel calorimeter has been installed in its final position in October 2005. Since then, the calorimeter is being equipped with front-end electronics. Starting in April 2006, electronics calibration runs are taken a few times per week to debug the electronics and to study the performance in the pit (stability, noise). Today, 10 out of the 32 Front End crates are being read out, amounting to about 35000 channels. cool down, few little typos --> After a 6-week cool down, the barrel cryostat was filled with Liquid Argon in May. The presence of a few shorts (~1MΩ) at the edges of the modules was indicating the possibility of conducting dust having entered into the calorimeter with the flowing liquid. In order to try to improve this situation, the calorimeter was emptied and filled again, but this time by condensating the argon instead of flowing it in liquid phase. The new High Voltage tests are not showing any significant improvement but the situation is statisfactory for ATLAS runn...

  14. The GlueX Barrel Electromagnetic Calorimeter

    Science.gov (United States)

    Papandreou, Zisis; Lolos, George; Semenov, Andrei; GlueX Collaboration

    2011-04-01

    The goal of the GLUEX experiment at Jefferson Lab is to search for exotic hybrid mesons as evidence of gluonic excitations, in an effort to understand confinement in QCD. A key subsystem of the GLUEX detector is the electromagnetic barrel calorimeter (BCAL) located inside a 2-Tesla superconducting solenoid. BCAL is a ``spaghetti calorimeter,'' consisting of layers of corrugated lead sheets, interleaved with planes of 1-mm-diameter, double-clad, Kuraray SCSF-78MJ scintillating fibres, bonded in the lead grooves using optical epoxy. The detector will consist of 48 modules and will be readout using nearly 4,000 large-area (1.26 cm2 each) silicon photomultiplier arrays. BCAL construction is well under way at the University of Regina and test results will be shown. Supported by NSERC grant SAPJ-326516, DOE grant DE-FG02-0SER41374 and Jefferson Science Associates, LLC. under U.S. DOE Contract No. DE-AC05-06OR23177.

  15. Tile Calorimete Pre-Assembly Summary and Barrel Assembly Plan

    CERN Document Server

    Proudfoot, J; Liablin, M V; Topilin, N D

    2004-01-01

    The barrel survey results from the pre-assembly in Building 185 are reviewed. From these and the models developed to calculate the cylinder geometry we propose a minimal modification to the shimming plan for the barrel calorimeter assembly in the Atlas cavern. At the precision of this calculation, we expect the tile calorimeter to be almost entirely within it design envelope. The focus of this note is the radial envelope. Based on the pre-assembly experience the tile calorimeter will fit comfortably within its envelope along the beam line.

  16. Charged Pion Energy Reconstruction in the ATLAS Barrel Calorimeter

    CERN Document Server

    Bosman, M; Nessi, Marzio

    2000-01-01

    The intrinsic performance of the ATLAS barrel and extended barrelcalorimeters for the measurement of charged pions is presented. Pion energyscans (E = 20, 50, 200, 400 and 1000 GeV) at two pseudo-rapidity points ($\\eta$= 0.3 and 1.3) and pseudorapidity scans ($-0.2 < \\eta < 1.8$) with pions ofconstant transverse energy ($E_T = 20$ and 50 GeV) are analysed. A simpleapproach, that accounts in first order for non-compensation and dead materialeffects, is used for the pion energy reconstruction. The intrinsic performancesof the calorimeter are studied: resolution, linearity, effect of dead material,tails in the energy distribution. The effect of electronic noise, cell energycuts and restricted cone size are investigated.

  17. Construction and test results of the ATLAS EM barrel calorimeter and presampler

    CERN Document Server

    Hostachy, J Y

    2003-01-01

    The construction of the ATLAS liquid argon electromagnetic (EM) barrel calorimeter and presampler is well under way: modules and sectors for more than half a barrel have now been produced. Particular emphasis will be put on the qualification tests allowing this construction. The system: calorimeter module +2 presampler sectors has been exposed several times to muon, electron and photon beams at CERN. Results concerning muons and photons are shown. Energy resolution and the uniformity studies performed with electrons are presented in the same proceedings by Dr. M. Fanti.

  18. High precision, low disturbance calibration of the High Voltage system of the CMS Barrel Electromagnetic Calorimeter

    CERN Document Server

    Fasanella, Giuseppe

    2016-01-01

    The CMS Electromagnetic Calorimeter utilizes scintillating lead tungstate crystals, with avalanche photodiodes (APD) as photo-detectors in the barrel part. 1224 HV channels bias groups of 50 APD pairs, each at a voltage of about 380 V. The APD gain dependence on the voltage is 3pct/V. A stability of better than 60 mV is needed to have negligible impact on the calorimeter energy resolution. Until 2015 manual calibrations were performed yearly. A new calibration system was deployed recently, which satisfies the requirement of low disturbance and high precision. The system is discussed in detail and first operational experience is presented.

  19. High precision, low disturbance calibration system for the CMS Barrel Electromagnetic Calorimeter High Voltage apparatus

    Science.gov (United States)

    Fasanella, G.

    2017-01-01

    The CMS Electromagnetic Calorimeter utilizes scintillation lead tungstate crystals, with avalanche photodiodes (APD) as photo-detectors in the barrel part. 1224 HV channels bias groups of 50 APD pairs, each at a voltage of about 380 V. The APD gain dependence on the voltage is 3%/V. A stability of better than 60 mV is needed to have negligible impact on the calorimeter energy resolution. Until 2015 manual calibrations were performed yearly. A new calibration system was deployed recently, which satisfies the requirement of low disturbance and high precision. The system is discussed in detail and first operational experience is presented.

  20. High precision, low disturbance calibration of the High Voltage system of the CMS Barrel Electromagnetic Calorimeter

    CERN Document Server

    Marzocchi, Badder

    2017-01-01

    The CMS Electromagnetic Calorimeter is made of scintillating lead tungstate crystals, using avalanche photodiodes (APD) as photo-detectors in the barrel part. The high voltage system, consisting of 1224 channels, biases groups of 50 APD pairs, each at a voltage of about 380 V. The APD gain dependence on the voltage is 3pct/V. A stability of better than 60 mV is needed to have negligible impact on the calorimeter energy resolution. Until 2015 manual calibrations were performed yearly. A new calibration system was deployed recently, which satisfies the requirement of low disturbance and high precision. The system is discussed in detail and first operational experience is presented.

  1. Performance of the ATLAS Calorimeters using Cosmic Ray Muons

    OpenAIRE

    Santoni, C.

    2010-01-01

    International audience; The ATLAS calorimeters provide precision measurements of electrons, photons, jets and missing transverse energy produced in the LHC proton-proton collisions. High granularity liquid-argon electromagnetic and hadronic sampling calorimeters are used. An iron-scintillator hadronic calorimeter surrounds the liquid-argon detectors. Results assessing the calorimeter performance obtained using cosmic ray muons are presented. The non-uniformity of the barrel electromagnetic ca...

  2. Design, Construction and Installation of the ATLAS Hadronic Barrel Scintillator-Tile Calorimeter

    CERN Document Server

    Abdallah, J; Alexa, C; Alves, R; Amaral, P; Ananiev, A; Anderson, K; Andresen, X; Antonaki, A; Batusov, V; Bednar, P; Bergeaas, E; Biscarat, C; Blanch, O; Blanchot, G; Bohm, C; Boldea, V; Bosi, F; Bosman, M; Bromberg, C; Budagov, Yu A; Calvet, D; Cardeira, C; Carli, T; Carvalho, J; Cascella, M; Castillo, M V; Costello, J; Cavalli-Sforza, M; Cavasinni, V; Cerqueira, A S; Clément, C; Cobal, M; Cogswell, F; Constantinescu, S; Costanzo, D; Da Silva, P; Davidek, M; David, T; Dawson, J; De, K; Del Prete, T; Di Girolamo, B; Dita, S; Dolejsi, J; Dolezal, Z; Dotti, A; Downing, R; Drake, G; Efthymiopoulos, I; Errede, D; Errede, S; Farbin, A; Fassouliotis, D; Feng, E; Fenyuk, A; Ferdi, C; Ferreira, B C; Ferrer, A; Flaminio, V; Flix, J; Francavilla, P; Fullana, E; Garde, V; Gellerstedt, K; Giakoumopoulou, V; Giangiobbe, V; Gildemeister, O; Gilewsky, V; Giokaris, N; Gollub, N; Gomes, A; González, V; Gouveia, J; Grenier, P; Gris, P; Guarino, V; Guicheney, C; Sen-Gupta, A; Hakobyan, H; Haney, M; Hellman, S; Henriques, A; Higón, E; Hill, N; Holmgren, S; Hruska, I; Hurwitz, M; Huston, J; Jen-La Plante, I; Jon-And, K; Junk, T; Karyukhin, A; Khubua, J; Klereborn, J; Kopikov, S; Korolkov, I; Krivkova, P; Kulchitsky, Y; Kurochkin, Yu; Kuzhir, P; Lapin, V; Le Compte, T; Lefèvre, R; Leitner, R; Li, J; Liablin, M; Lokajícek, M; Lomakin, Y; Lourtie, P; Lovas, L; Lupi, A; Maidantchik, C; Maio, A; Maliukov, S; Manousakis, A; Marques, C; Marroquim, F; Martin, F; Mazzoni, E; Merritt, F S; Myagkov, A; Miller, R; Minashvili, I; Miralles, L; Montarou, G; Némécek, S; Nessi, M; Nikitine, I; Nodulman, L; Norniella, O; Onofre, A; Oreglia, M; Palan, B; Pallin, D; Pantea, D; Pereira, A; Pilcher, J E; Pina, J; Pinhão, J; Pod, E; Podlyski, F; Portell, X; Poveda, J; Pribyl, L; Price, L E; Proudfoot, J; Ramalho, M; Ramstedt, M; Raposeiro, L; Reis, J; Richards, R; Roda, C; Romanov, V; Rosnet, P; Roy, P; Ruiz, A; Rumiantsau, V; Russakovich, N; Sada Costa, J; Salto, O; Salvachúa, B; Sanchis, E; Sanders, H; Santoni, C; Santos, J; Saraiva, J G; Sarri, F; Says, L P; Schlager, G; Schlereth, J L; Seixas, J M; Selldén, B; Shalanda, N; Shevtsov, P; Shochet, M; Simaitis, V; Simonyan, M; Sisakian, A; Sjölin, J; Solans, C; Solodkov, A; Solovianov, J; Silva, O; Sosebee, M; Spanó, F; Speckmeyer, P; Stanek, R; Starchenko, E; Starovoitov, P; Suk, M; Sykora, I; Tang, F; Tas, P; Teuscher, R; Tokar, S; Topilin, N; Torres, J; Underwood, D; Usai, G; Valero, A; Valkár, S; Valls, J A; Vartapetian, A; Vazeille, F; Vellidis, C; Ventura, F; Vichou, I; Vivarelli, I; Volpi, M; White, A; Zaitsev, A; Zenin, A; Zenis, T; Zenonos, Z; Zenz, S; Zilka, B

    2007-01-01

    The scintillator tile hadronic calorimeter is a sampling calorimeter using steel as the absorber structure and scintillator as the active medium. The scintillator is located in "pockets" in the steel structure and the wavelength-shifting fibers are contained in channels running radially within the absorber to photomultiplier tubes which are located in the outer support girders of the calorimeter structure. In addition, to its role as a detector for high energy particles, the tile calorimeter provides the direct support of the liquid argon electromagnetic calorimeter in the barrel region, and the liquid argon electromagnetic and hadronic calorimeters in the endcap region. Through these, it indirectly supports the inner tracking system and beam pipe. The steel absorber, and in particular the support girders, provide the flux return for the solenoidal field from the central solenoid. Finally, the end surfaces of the barrel calorimeter are used to mount services, power supplies and readout crates for the inner tr...

  3. Energy Resolution of the Barrel of the CMS Electromagnetic Calorimeter

    CERN Document Server

    Adzic, Petar; Almeida, Carlos; Almeida, Nuno; Anagnostou, Georgios; Anfreville, Marc; Anicin, Ivan; Antunovic, Zeljko; Auffray, Etiennette; Baccaro, Stefania; Baffioni, Stephanie; Baillon, Paul; Barney, David; Barone, Luciano; Barrillon, Pierre; Bartoloni, Alessandro; Beauceron, Stephanie; Beaudette, Florian; Bell, Ken W; Benetta, Robert; Bercher, Michel; Berthon, Ursula; Betev, Botjo; Beuselinck, Raymond; Bhardwaj, Ashutosh; Bialas, Wojciech; Biino, Cristina; Bimbot, Stephane; Blaha, Jan; Bloch, Philippe; Blyth, Simon; Bordalo, Paula; Bornheim, Adolf; Bourotte, Jean; Britton, David; Brown, Robert M; Brunelière, Renaud; Busson, Philippe; Camporesi, Tiziano; Cartiglia, Nicolo; Cavallari, Francesca; Cerutti, Muriel; Chamont, David; Chang, Paoti; Chang, You-Hao; Charlot, Claude; Chatterji, Sudeep; Chen, E Augustine; Chipaux, Rémi; Choudhary, Brajesh C; Cockerill, David J A; Collard, Caroline; Combaret, Christophe; Cossutti, Fabio; Da Silva, J C; Dafinei, Ioan; Daskalakis, Georgios; Davatz, Giovanna; Decotigny, David; De Min, Alberto; Deiters, Konrad; Dejardin, Marc; Del Re, Daniele; Della Negra, Rodolphe; Della Ricca, Giuseppe; Depasse, Pierre; Descamp, J; Dewhirst, Guy; Dhawan, Satish; Diemoz, Marcella; Dissertori, Günther; Dittmar, Michael; Djambazov, Lubomir; Dobrzynski, Ludwik; Drndarevic, Snezana; Dupanloup, Michel; Dzelalija, Mile; Ehlers, Jan; El-Mamouni, H; Peisert, Anna; Evangelou, Ioannis; Fabbro, Bernard; Faure, Jean-Louis; Fay, Jean; Ferri, Federico; Flower, Paul S; Franzoni, Giovanni; Funk, Wolfgang; Gaillac, Anne-Marie; Gargiulo, Corrado; Gascon-Shotkin, S; Geerebaert, Yannick; Gentit, François-Xavier; Ghezzi, Alessio; Gilly, Jean; Giolo-Nicollerat, Anne-Sylvie; Givernaud, Alain; Gninenko, Sergei; Go, Apollo; Godinovic, Nikola; Golubev, Nikolai; Golutvin, Igor; Gómez-Reino, Robert; Govoni, Pietro; Grahl, James; Gras, Philippe; Greenhalgh, Justin; Guillaud, Jean-Paul; Haguenauer, Maurice; Hamel De Montechenault, G; Hansen, Magnus; Heath, Helen F; Hill, Jack; Hobson, Peter R; Holmes, Daniel; Holzner, André; Hou, George Wei-Shu; Ille, Bernard; Ingram, Quentin; Jain, Adarsh; Jarry, Patrick; Jauffret, C; Jha, Manoj; Karar, M A; Kataria, Sushil Kumar; Katchanov, V A; Kennedy, Bruce W; Kloukinas, Kostas; Kokkas, Panagiotis; Korjik, M; Krasnikov, Nikolai; Krpic, Dragomir; Kyriakis, Aristotelis; Lebeau, Michel; Lecomte, Pierre; Lecoq, Paul; Lemaire, Marie-Claude; Lethuillier, Morgan; Lin, Willis; Lintern, A L; Lister, Alison; Litvin, V; Locci, Elizabeth; Lodge, Anthony B; Longo, Egidio; Loukas, Demetrios; Luckey, D; Lustermann, Werner; Lynch, Clare; MacKay, Catherine Kirsty; Malberti, Martina; Maletic, Dimitrije; Mandjavidze, Irakli; Manthos, Nikolaos; Markou, Athanasios; Mathez, Hervé; Mathieu, Antoine; Matveev, Viktor; Maurelli, Georges; Menichetti, Ezio; Meridiani, Paolo; Milenovic, Predrag; Milleret, Gérard; Miné, Philippe; Mur, Michel; Musienko, Yuri; Nardulli, Alessandro; Nash, Jordan; Neal, Homer; Nédélec, Patrick; Negri, Pietro; Nessi-Tedaldi, Francesca; Newman, Harvey B; Nikitenko, Alexander; Obertino, Maria Margherita; Ofierzynski, Radoslaw Adrian; Organtini, Giovanni; Paganini, Pascal; Paganoni, Marco; Papadopoulos, Ioannis; Paramatti, Riccardo; Pastrone, Nadia; Pauss, Felicitas; Puljak, Ivica; Pullia, Antonino; Puzovic, Jovan; Ragazzi, Stefano; Ramos, Sergio; Rahatlou, Shahram; Rander, John; Ranjan, Kirti; Ravat, Olivier; Raymond, M; Razis, Panos A; Redaelli, Nicola; Renker, Dieter; Reucroft, Steve; Reymond, Jean-Marc; Reynaud, Michel; Reynaud, Serge; Romanteau, Thierry; Rondeaux, Françoise; Rosowsky, André; Rovelli, Chiara; Rumerio, Paolo; Rusack, Roger; Rusakov, Sergey V; Ryan, Matthew John; Rykaczewski, Hans; Sakhelashvili, Tariel; Salerno, Roberto; Santos, Marcelino; Seez, Christopher; Semeniouk, Igor; Sharif, Omar; Sharp, Peter; Shepherd-Themistocleous, Claire; Shevchenko, Sergey; Shivpuri, Ram Krishen; Sidiropoulos, Georgios; Sillou, Daniel; Singovsky, Alexander; Sirois, Y; Sirunyan, Albert M; Smith, Brian; Smith, Vincent J; Sproston, Martin; Suter, Henry; Swain, John; Tabarelli de Fatis, Tommaso; Takahashi, Maiko; Tapper, Robert J; Tcheremoukhine, Alexandre; Teixeira, Isabel; Teixeira, Joao Paulo; Teller, Olivier; Timlin, Claire; Triantis, F A; Troshin, Sergey; Tyurin, Nikolay; Ueno, Koji; Uzunian, Andrey; Varela, Joao; Vaz-Cardoso, N; Verrecchia, Patrice; Vichoudis, Paschalis; Vigano, S; Viertel, Gert; Virdee, Tejinder; Vlassov, E; Wang, Minzu; Weinstein, Alan; Williams, Jennifer C; Yaselli, Ignacio; Zabi, Alexandre; Zamiatin, Nikolai; Zelepoukine, Serguei; Zeller, Michael E; Zhang, Lin; Zhang, Jia-Wen; Zhang, Yawei; Zhu, Kejun; Zhu, Ren-Yuan

    2007-01-01

    The energy resolution of the barrel part of the CMS Electromagnetic Calorimeter has been studied using electrons of 20 to 250 GeV in a test beam. The incident electron's energy was reconstructed by summing the energy measured in arrays of 3x3 or 5x5 channels. There was no significant amount of correlated noise observed within these arrays. For electrons incident at the centre of the studied 3x3 arrays of crystals, the mean stochastic term was measured to be 2.8% and the mean constant term to be 0.3%. The amount of the incident electron's energy which is contained within the array depends on its position of incidence. The variation of the containment with position is corrected for using the distribution of the measured energy within the array. For uniform illumination of a crystal with 120 GeV electrons a resolution of 0.5% was achieved. The energy resolution meets the design goal for the detector.

  4. Design studies for the Phase II upgrade of the CMS Barrel Electromagnetic Calorimeter

    Science.gov (United States)

    Bornheim, A.

    2017-03-01

    The High Luminosity LHC (HL-LHC) aims to reach the unprecedented integrated luminosity of 3 ab‑1 with an instantaneous luminosity up to 5 × 1034 cm‑2 s‑1. This poses stringent requirements on the radiation resistance of detector components and on the latency of the trigger system. The barrel region of the CMS Electromagnetic Calorimeter will be able to retain the current lead tungstate crystals and avalanche photo diode detectors which will meet the performance requirements throughout the operational lifetime of the HL-LHC. The new front-end electronics and very front-end system required at high luminosities will be described.

  5. The CMS electromagnetic calorimeter barrel upgrade for High-Luminosity LHC

    CERN Document Server

    Gras, Philippe

    2015-01-01

    The High Luminosity LHC (HL-LHC) will provide unprecedented instantaneous and integrated luminosity. The lead tungstatecrystals forming the barrel part of the CMS Electromagnetic Calorimeter (ECAL) will still perform well, even after theexpected 3000$\\,$fb$^{-1}$ at the end of HL-LHC. The scintillation light is measured with avalanche photodiodes (APDs).Although the APDs will continue to be operational, there will be some increase in noise due to radiation-induceddark-currents. Triggering on electromagnetic objects with $\\sim$140 pileup events necessitates a change of the front-endelectronics. New developments in high-speed optical links will allow single-crystal readout at 40 MHz to upgradedoff-detector processors, allowing maximum flexibility and enhanced triggering possibilities. The very-front-end system willalso be upgraded, to provide improved rejection of anomalous signals in the APDs as well as to mitigate the increase in APDnoise. We are also considering lowering the ECAL barrel operating temperature...

  6. ATLAS Tile Calorimeter central barrel assembly and installation.

    CERN Multimedia

    nikolai topilin

    2009-01-01

    These photos belong to the self-published book by Nikolai Topilin "ATLAS Hadron Calorimeter Assembly". The book is a collection of souvenirs from the years of assembly and installation of the Tile Hadron Calorimeter, which extended from November 2002 until May 2006.

  7. Design studies for the Phase II upgrade of the CMS Barrel Electromagnetic Calorimeter

    CERN Document Server

    Orimoto, Toyoko Jennifer

    2016-01-01

    The High Luminosity LHC (HL-LHC) will provide unprecedented instantaneous and integrated luminosity. The lead tungstate crystals forming the barrel part of the Electromagnetic Calorimeter (ECAL) of the Compact Muon Solenoid (CMS) will still perform well, even after the expected integrated luminosity of 3000fb-1 at the end of HL-LHC. The avalanche photodiodes (APDs) used to detect the scintillation light will also continue to be operational, although there will be some increase in noise due to radiation-induced dark currents. This will be mitigated by reducing the barrel operating temperature during HL-LHC running.The front-end electronics of the ECAL barrel will be replaced, in order to remove existing constraints on trigger rate and latency and to provide additional capability to fully exploit the higher luminosity delivered by the HL-LHC. New developments in high-speed optical links will allow single-crystal readout at 40 MHz to upgraded off-detector processors, allowing maximum flexibility and enhanced tri...

  8. Design studies for the Phase II upgrade of the CMS Barrel Electromagnetic Calorimeter

    CERN Document Server

    Orimoto, Toyoko Jennifer

    2016-01-01

    The High Luminosity LHC (HL-LHC) will provide unprecedented instantaneous and integrated luminosity. The lead tungstate crystals forming the barrel part of the Electromagnetic Calorimeter (ECAL) of the Compact Muon Solenoid (CMS) will still perform well, even after the expected integrated luminosity of 3000fb-1 at the end of HL-LHC. The avalanche photodiodes (APDs) used to detect the scintillation light will also continue to be operational, although there will be some increase in noise due to radiation-induced dark currents. This will be mitigated by reducing the barrel operating temperature during HL-LHC running.The front-end electronics of the ECAL barrel will be replaced, in order to remove existing constraints on trigger rate and latency and to provide additional capability to fully exploit the higher luminosity delivered by the HL-LHC. New developments in high-speed optical links will allow single-crystal readout at 40 MHz to upgraded off-detector processors, allowing maximum flexibility and enhanced tri...

  9. Performance and Operation of the CMS Electromagnetic Calorimeter

    CERN Document Server

    Chatrchyan, S; 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; 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    2010-01-01

    The operation and general performance of the CMS electromagnetic calorimeter using cosmic-ray muons are described. These muons were recorded after the closure of the CMS detector in late 2008. The calorimeter is made of lead tungstate crystals and the overall status of the 75848 channels corresponding to the barrel and endcap detectors is reported. The stability of crucial operational parameters, such as high voltage, temperature and electronic noise, is summarised and the performance of the light monitoring system is presented.

  10. Performance and Operation of the CMS Electromagnetic Calorimeter

    CERN Document Server

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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 operation and general performance of the CMS electromagnetic calorimeter using cosmic-ray muons are described. These muons were recorded after the closure of the CMS detector in late 2008. The calorimeter is made of lead tungstate crystals and the overall status of the 75848 channels corresponding to the barrel and endcap detectors is reported. The stability of crucial operational parameters, such as high voltage, temperature and electronic noise, is summarised and the performance of the light monitoring system is presented.

  11. Insertion of the first half-barrel of the ATLAS electromagnetic calorimeter into its cryostat

    CERN Multimedia

    Maximilien Brice

    2003-01-01

    The first cylinder of the ATLAS electromagnetic calorimeter barrel and the presampler have been inserted in the cryostat.The ATLAS electromagnetic calorimeter is intended to detect electrons, positrons and photons by measuring the energy they deposit on being absorbed. The cylinder of the calorimeter is in two halves, that will be sunk in a liquid-argon bath cooled to 90 kelvin (-180°C). Each half-barrel is 3.2 metres long, 53 cm thick and formed by assembling 16 modules. Each module is made up of alternate lead absorbers and electrodes pressed into 64 layers folded accordion-fashion. The presampler, set up inside the cylinder, is an integral part of the calorimeter system: It measures the energy lost by a particle before it reaches the calorimeter. To ensure an ultra-clean environment, a tent (visible here) was erected round the calorimeter and entry point to the cryostat. The detector and presampler, fitted together, could then be slid gradually into the cryostat like a drawer. To do so, the insertion team...

  12. Insertion of the first half-barrel of the ATLAS electromagnetic calorimeter into its cryostat

    CERN Multimedia

    Maximilien Brice

    2003-01-01

    The first cylinder of the ATLAS electromagnetic calorimeter barrel and the presampler have been inserted in the cryostat. The ATLAS electromagnetic calorimeter is intended to detect electrons, positrons and photons by measuring the energy they deposit on being absorbed. The cylinder of the calorimeter is in two halves, that will be sunk in a liquid-argon bath cooled to 90 kelvin (-180°C). Each half-barrel is 3.2 metres long, 53 cm thick and formed by assembling 16 modules. Each module is made up of alternate lead absorbers and electrodes pressed into 64 layers folded accordion-fashion. The presampler, set up inside the cylinder, is an integral part of the calorimeter system: It measures the energy lost by a particle before it reaches the calorimeter. To ensure an ultra-clean environment, a tent was erected round the calorimeter and entry point to the cryostat. The detector and presampler, fitted together, could then be slid gradually into the cryostat like a drawer. To do so, the insertion team had to fine-t...

  13. Energy Resolution Performance of the CMS Electromagnetic Calorimeter

    CERN Document Server

    Adzic, Petar; Almeida, Carlos; Almeida, Nuno; Anagnostou, Georgios; Anfreville, Marc; Anicin, Ivan; Antunovic, Zeljko; Auffray, Etiennette; Baccaro, Stefania; Baffioni, Stephanie; Barney, David; Barone, Luciano; Barrillon, Pierre; Bartoloni, Alessandro; Beauceron, Stephanie; Beaudette, Florian; Bell, Ken W; Benetta, Robert; Bercher, Michel; Berthon, Ursula; Betev, Botjo; Beuselinck, Raymond; Bhardwaj, Ashutosh; Biino, Cristina; Bimbot, Stephane; Blaha, Jan; Bloch, Philippe; Blyth, Simon; Bordalo, Paula; Bornheim, Adolf; Bourotte, Jean; Britton1, D; Brown, Robert M; Brunelière, Renaud; Busson, Philippe; Camporesi, Tiziano; Cartiglia, Nicolo; Cavallari, Francesca; Cerutti, Muriel; Chamont, David; Chang, Paoti; Chang, You-Hao; Charlot, Claude; Chatterji, Sudeep; Chen, E Augustine; Chipaux, Rémi; Choudhary, Brajesh C; Cockerill, David J A; Collard, Caroline; Combaret, Christophe; Cossutti, Fabio; Costantini, Silvia; Da Silva, J C; Dafinei, Ioan; Daskalakis, Georgios; Davatz, Giovanna; Debraine, Alain; Decotigny, David; De Min, Alberto; Deiters, Konrad; Dejardin, Marc; Della Negra, Rodolphe; Della Ricca, Giuseppe; Depasse, Pierre; Descamp, J; Dewhirst, Guy; Dhawan, Satish; Diemoz, Marcella; Dissertori, Günther; Dittmar, Michael; Djambazov, Lubomir; Dobrzynski, Ludwik; Drndarevic, Snezana; Dupanloup, Michel; Dzelalija, Mile; Ehlers, Jan; El-Mamouni, H; Peisert, Anna; Evangelou, Ioannis; Fabbro, Bernard; Faure, Jean-Louis; Fay, Jean; Ferri, Federico; Flower, Paul S; Franzoni, Giovanni; Funk, Wolfgang; Gaillac, Anne-Marie; Gargiulo, Corrado; Gascon-Shotkin, S; Geerebaert, Yannick; Gentit, François-Xavier; Ghezzi, Alessio; Gilly, Jean; Giolo-Nicollerat, Anne-Sylvie; Givernaud, Alain; Gninenko, Sergei; Go, Apollo; Godinovic, Nikola; Golubev, Nikolai; Golutvin, Igor; Gómez-Reino, Robert; Govoni, Pietro; Grahl1, J; Gras1, P; Greenhalgh, Justin; Guillaud, Jean-Paul; Haguenauer, Maurice; Hamel-de-Montechenault, G; Hansen, Magnus; Heath, Helen F; AHill, J; Hobson, Peter R; Holmes, Daniel; Holzner, André; Hou, George Wei-Shu; Ille, Bernard; Ingram, Quentin; Jain, Adarsh; Jarry, Patrick; Jauffret, C; Jha, Manoj; Karar, Akli; Kataria, Sushil Kumar; Katchanov, V A; Kennedy, Bruce W; Kloukinas, Kostas; Kokkas, Panagiotis; Korjik, M; Krasnikov, Nikolai; Krpic, Dragomir; Kyriakis, Aristotelis; Lebeau, Michel; Lecomte, Pierre; Lecoq, Paul; Lemaire, Marie-Claude; Lethuillier, Morgan; Lin, Willis; Lintern, A L; Lister, Alison; Litvin, V; Locci, Elizabeth; Lodge, Anthony B; Longo, Egidio; Loukas, Demetrios; Luckey, D; Lustermann, Werner; Lynch, Clare; MacKay, Catherine Kirsty; Malberti, Martina; Maletic, Dimitrije; Mandjavidze, Irakli; Manthos, Nikolaos; Markou, Athanasios; Mathez, Hervé; Mathieu, Antoine; Matveev, Viktor; Maurelli, Georges; Menichetti, Ezio; Meridiani, Paolo; Milenovic, Predrag; Milleret, Gérard; Miné, Philippe; Mur, Michel; Musienko, Yuri; Nardulli, Alessandro; Nash, Jordan; Neal, Homer; Nédélec, Patrick; Negri, Pietro; Nessi-Tedaldi, Francesca; Newman26, H B; Nikitenko, Alexander; Obertino, Maria Margherita; Ofierzynski, Radoslaw Adrian; Organtini, Giovanni; Paganini, Pascal; Paganoni, Marco; Papadopoulos, Ioannis; Paramatti, Riccardo; Pastrone, Nadia; Pauss, Felicitas; Poilleux, Patrick; Puljak, Ivica; Pullia, Antonino; Puzovic, Jovan; Ragazzi, Stefano; Ramos, Sergio; Rahatlou, Shahram; Rander, John; Ranjan, Kirti; Ravat, Olivier; Raymond, M; Razis, Panos A; Redaelli, Nicola; Renker, Dieter; Reucroft, Steve; Reymond, Jean-Marc; Reynaud, Michel; Reynaud, Serge; Romanteau, Thierry; Rondeaux, Françoise; Rosowsky, André; Rovelli, Chiara; Rumerio, Paolo; Rusack, Roger; Rusakov, Sergey V; Ryan, Matthew John; Rykaczewski, Hans; Sakhelashvili, Tariel; Salerno, Roberto; Santos, Marcelino; Seez, Christopher; Semeniouk, Igor; Sharif, Omar; Sharp, Peter; Shepherd-Themistocleous, Claire; Shevchenko, Sergey; Shivpuri, Ram Krishen; Sidiropoulos, Georgios; Sillou, Daniel; Singovsky, Alexander; Sirois, Yves; Sirunyan, Albert M; Smith, Brian; Smith, Vincent J; Sproston, Martin; Suter, Henry; Swain, John; Tabarelli de Fatis, Tommaso; Takahashi, Maiko; Tapper, Robert J; Tcheremoukhine, Alexandre; Teixeira, Isabel; Teixeira, Joao Paulo; Teller, Olivier; Timlin, Claire; ATriantis, F; Troshin, Sergey; Tyurin, Nikolay; Ueno, Koji; Uzunian, Andrey; Varela, Joao; Vaz-Cardoso, N; Verrecchia, Patrice; Vichoudis, Paschalis; Vigano, S; Viertel, Gert; Virdee, Tejinder; Vlassov, E; Wang, Minzu; Weinstein, Alan; Williams, Jennifer C; Yaselli, Ignacio; Zabi, Alexandre; Zamiatin, Nikolai; Zelepoukine, Serguei; Zeller, Michael E; Zhang, Lin; Zhang, Yawei; Zhu, Kejun; Zhu, Ren-Yuan

    2006-01-01

    The energy resolution performance of the CMS lead tungstate crystal electromagnetic calorimeter is presented. Measurements were made with an electron beam using a fully equipped supermodule of the calorimeter barrel. Results are given both for electrons incident on the centre of crystals and for electrons distributed uniformly over the calorimeter surface. The electron energy is reconstructed in matrices of 3 times 3 or 5 times 5 crystals centred on the crystal containing the maximum energy. Corrections for variations in the shower containment are applied in the case of uniform incidence. The resolution measured is consistent with the design goals.

  14. Intercalibration of the barrel electromagnetic calorimeter of the CMS experiment at start-up

    CERN Document Server

    Adzic, Petar; Almeida, Nuno; Anagnostou, Georgios; Andelin, Daniel; Anfreville, Marc; Anicin, Ivan; Antunovic, Zeljko; Arcidiacono, Roberta; Arenton, Michael Wayne; Auffray, Etiennette; Argiro, Stefano; Askew, Andrew; Atramentov, Oleksiy; Baccaro, Stefania; Baffioni, Stephanie; Balazs, Michael; Barney, David; Barone, Luciano; Bartoloni, Alessandro; Baty, Clement; Bandurin, Dmitry; Beauceron, Stephanie; Bell, Ken W; Benetta, Robert; Bercher, Michel; Bernet, Colin; Berthon, Ursula; Besançon, Marc; Betev, Botjo; Beuselinck, Raymond; Biino, Cristina; Blaha, Jan; Bloch, Philippe; Blyth, Simon; Bornheim, Adolf; Bourotte, Jean; Brett, Angela Mary; Brown, Robert M; Britton, David; Bühler, M; Busson, Philippe; Camanzi, Barbara; Camporesi, Tiziano; Carrera, E; Cartiglia, Nicolo; Cavallari, Francesca; Cerutti, Muriel; Chang, Paoti; Chang, You-Hao; Charlot, Claude; Chen, E Augustine; Chen, Wan-Ting; Chen, Zheng-Yu; Chipaux, Rémi; Choudhary, Brajesh C; Choudhury, Rajani Kant; Cockerill, David J A; Combaret, Christophe; Conetti, Sergio; Cossutti, Fabio; Cox, Bradley; Cussans, David; Dafinei, Ioan; Da Silva Di Calafiori, Diogo Raphael; Daskalakis, Georgios; Davatz, Giovanna; David, A; Deiters, Konrad; Dejardin, Marc; Djordjevic, Milos; Della Negra, Rodolphe; Della Ricca, Giuseppe; Del Re, Daniele; De Min, Alberto; Denegri, Daniel; Depasse, Pierre; Descamps, Julien; Diemoz, Marcella; Di Marco, Emanuele; Dissertori, Günther; Dittmar, Michael; Djambazov, Lubomir; Dobrzynski, Ludwik; Drndarevic, Snezana; Duboscq, Jean Etienne; Dutta, Dipanwita; Dzelalija, Mile; Peisert, A; El-Mamouni, H; Evangelou, Ioannis; Evans, David; Fabbro, Bernard; Faure, Jean-Louis; Fay, Jean; Ferri, Federico; Flower, Paul S; Franci, Daniele; Franzoni, Giovanni; Freudenreich, Klaus; Funk, Wolfgang; Ganjour, Serguei; Gargiulo, Corrado; Gascon, Susan; Gataullin, Marat; Geerebaert, Yannick; Gentit, François-Xavier; Gershtein, Yuri; Ghezzi, Alessio; Ghodgaonkar, Manohar; Gilly, Jean; Givernaud, Alain; Gninenko, Sergei; Go, Apollo; Gobbo, Benigno; Godinovic, Nikola; Golubev, Nikolai; Gong, Datao; Govoni, Pietro; Grant, Nicholas; Gras, Philippe; Greenhalgh, R J S; Guevara Riveros, Luz; Guillaud, Jean-Paul; Haguenauer, Maurice; Hamel de Monchenault, Gautier; Hansen, Magnus; Heath, Helen F; Heltsley, Brian; Hill, Jack; Hintz, Wieland; Hirosky, Robert; Hobson, Peter R; Honma, Alan; Hou, George Wei-Shu; Hsiung, Yee; Husejko, Michal; Ille, Bernard; Imlay, Richard; Ingram, Quentin; Jarry, Patrick; Jessop, Colin; Jovanovic, Dragoslav; Kaadze, Ketino; Kachanov, Vassili; Kailas, Swaminathan; Kataria, Sushil Kumar; Kennedy, Bruce W; Kloukinas, Kostas; Kokkas, Panagiotis; Kolberg, Ted; Krasnikov, Nikolai; Krpic, Dragomir; Kubota, Yuichi; Kumar, P; Kuo, Chen-Cheng; Kyberd, Paul; Kyriakis, Aristotelis; Lebeau, Michel; Lecomte, Pierre; Lecoq, Paul; Ledovskoy, Alexander; Leshev, Georgi; Lethuillier, Morgan; Lin, Sheng-Wen; Lin, Willis; Lintern, A L; Litvine, Vladimir; Locci, Elizabeth; Lodge, Anthony B; Longo, Egidio; Loukas, Demetrios; Luckey, Paul David; Lustermann, Werner; Lynch, Clare; Ma, Yousi; Mahlke-Krüger, H; Malberti, Martina; Malcles, Julie; Maletic, Dimitrije; Mandjavidze, Irakli; Manthos, Nikolaos; Maravin, Yurii; Marchica, Carmelo; Marinelli, Nancy; Markou, Athanasios; Markou, Christos; Marone, Matteo; Mathez, Hervé; Matveev, Viktor; Mavrommatis, Charalampos; Maurelli, Georges; Meridiani, Paolo; Milenovic, Predrag; Milleret, Gérard; Miné, Philippe; Mohanty, Ajit Kumar; Moortgat, Filip; Mur, Michel; Musella, Pasquale; Musienko, Yuri; Nardulli, Alessandro; Nash, Jordan; Nédélec, Patrick; Negri, Pietro; Newman, Harvey B; Nikitenko, Alexander; Nessi-Tedaldi, Francesca; Obertino, Maria Margherita; Organtini, Giovanni; Orimoto, Toyoko; Paganoni, Marco; Paganini, Pascal; Palma, Alessandro; Panev, Bozhidar; Pant, Lalit Mohan; Papadakis, Antonakis; Papadakis, Ioannis; Papadopoulos, Ioannis; Paramatti, Riccardo; Parracho, P; Pastrone, Nadia; Patterson, Juliet Ritchie; Pauss, Felicitas; Petrakou, Eleni; Phillips, D G; Piroué, Pierre; Ptochos, Fotios; Puljak, Ivica; Pullia, Antonino; Punz, Thomas; Puzovic, Jovan; Ragazzi, Stefano; Rahatlou, Shahram; Rander, John; Razis, Panos A; Redaelli, Nicola; Renker, Dieter; Reucroft, Steve; Reymond, Jean-Marc; Ribeiro, Pedro Quinaz; Röser, Ulf; Rogan, Christopher; Romanteau, Thierry; Rondeaux, Françoise; Ronquest, Michael; Rosowsky, André; Rovelli, Chiara; Rumerio, Paolo; Rusack, Roger; Rusakov, Sergey V; Ryan, Matthew John; Sala, Leonardo; Salerno, Roberto; Santanastasio, Francesco; Schinzel, Dietrich; Seez, Christopher

    2008-01-01

    Calibration of the relative response of the individual channels of the barrel electromagnetic calorimeter of the CMS detector was accomplished before installation with cosmic ray muons and test beams. One fourth of the calorimeter was exposed to a beam of high energy electrons and the relative calibration of the channels, the intercalibration, was found to be reproducible to a precision of about 0.3\\%. Additionally, data were collected with cosmic rays for the entire ECAL barrel during the commissioning phase. By comparing the intercalibration constants obtained with the electron beam data with those from the cosmic ray data, it is demonstrated that the latter provide an intercalibration precision of 1.5\\% over most of the ECAL. The best intercalibration precision is expected to come from the analysis of events collected {\\it in situ} during the LHC operation. Using data collected with both electrons and pion beams, several aspects of the intercalibration procedures based on electrons or neutral pions were in...

  15. The CMS barrel calorimeter response to particle beams from 2 to 350 GeV/c

    Energy Technology Data Exchange (ETDEWEB)

    Abdullin, S.; Gavrilov, V.; Ilyina, N.; Kaftanov, V.; Kisselevich, I.; Kolossov, V.; Krokhotin, A.; Kuleshov, S.; Litvintsev, D.; Nikitenko, A.; Pozdnyakov, A.; Safronov, G.; Semenov, S.; Stolin, V.; Ulyanov, A. [ITEP, Moscow (Russian Federation); Abramov, V.; Goncharov, P.; Kachanov, V.; Kalinin, A.; Khmelnikov, A.; Korablev, A.; Korneev, Y.; Krinitsyn, A.; Kryshkin, V.; Lukanin, V.; Pikalov, V.; Ryazanov, A.; Talov, V.; Troshin, S.; Turchanovich, L.; Tyurin, N.; Uzunian, A.; Volkov, A.; Zelepoukine, S. [IHEP, Protvino (Russian Federation); Acharya, B.; Aziz, T.; Banerjee, Sud.; Banerjee, Sun.; Bose, S.; Chendvankar, S.; Deshpande, P.V.; Dugad, S.; Gurtu, A.; Kalmani, S.; Maity, M.; Majumder, G.; Mazumdar, K.; Mondal, N.; Nagaraj, P.; Patil, M.; Reddy, L.; Satyanarayana, B.; Sharma, S.; Sudhakar, K.; Tonwar, S.; Verma, P. [Tata Institute of Fundamental Research, Mumbai (India); Adam, N.; Fisher, W.; Gerbaudo, D.; Halyo, V.; Hunt, A.; Jones, J.; Laird, E.; Mans, J.; Marlow, D.; Piroue, P.; Tully, C.; Werner, J. [Princeton University, Princeton, NJ (United States); Adams, M.; Bard, R.; Burchesky, K.; Qian, W. [University of Illinois at Chicago, Chicago, IL (United States); Adzic, P.; Djordjevic, M.; Maletic, D.; Milenovic, P. [Vinca Inst. of Nuclear Sciences, Belgrade (RS); Akchurin, N.; Berntzon, L.; Carrell, K.; Guemues, K.; Jeong, C.; Kim, H.; Lee, S.W.; Popescu, S.; Roh, Y.; Spezziga, M.; Thomas, R.; Volobouev, I.; Wigmans, R.; Yazgan, E. [Texas Tech Univ., Lubbock, TX (United States); Akgun, U.; Albayrak, E.; Ayan, S.; Clarida, W.; Debbins, P.; Duru, F.; Ingram, D.; Merlo, J.P.; Mestvirishvili, A.; Miller, M.; Moeller, A.; Norbeck, E.; Olson, J.; Onel, Y.; Ozok, F.; Schmidt, I.; Yetkin, T. [Univ. of Iowa, Iowa City, IA (United States); Alemany-Fernandez, R.; Almeida, N.; David, A.; Husejko, M.; Musella, P.; Parracho, P.; Ribeiro, P.; Silva, J.; Silva, P. [Lab. de Instrumentacao e Fisica Experimental de Particulas, Lisboa (Portugal)] [and others

    2009-04-15

    The response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum range from 2 to 350 GeV/c has been measured. To our knowledge, this is the widest range of momenta in which any calorimeter system has been studied. These tests, carried out at the H2 beam-line at CERN, provide a wealth of information, especially at low energies. The analysis of the differences in calorimeter response to charged pions, kaons, protons and antiprotons and a detailed discussion of the underlying phenomena are presented. We also show techniques that apply corrections to the signals from the considerably different electromagnetic (EB) and hadronic (HB) barrel calorimeters in reconstructing the energies of hadrons. Above 5 GeV/c, these corrections improve the energy resolution of the combined system where the stochastic term equals 84.7{+-}1.6% and the constant term is 7.4{+-}0.8%. The corrected mean response remains constant within 1.3% rms. (orig.)

  16. The CMS Barrel Calorimeter Response to Particle Beams from 2 to 350 GeV/c

    CERN Document Server

    Abdullin, Salavat; Acharya, Bannaje Sripathi; Adam, Nadia; Adams, Mark Raymond; Adzic, Petar; Akchurin, Nural; Akgun, Ugur; Albayrak, Elif Asli; Alemany-Fernandez, Reyes; Almeida, Nuno; Anagnostou, Georgios; Andelin, Daniel; Anderson, E Walter; Anfreville, Marc; Anicin, Ivan; Antchev, Georgy; Antunovic, Zeljko; Arcidiacono, Roberta; Arenton, Michael Wayne; Auffray, Etiennette; Argiro, Stefano; Askew, Andrew; Atramentov, Oleksiy; Ayan, S; Arcidy, M; Aydin, Sezgin; Aziz, Tariq; Baarmand, Marc M; Babich, Kanstantsin; Baccaro, Stefania; Baden, Drew; Baffioni, Stephanie; Bakirci, Mustafa Numan; Balazs, Michael; Banerjee, Sunanda; Banerjee, Sudeshna; Bard, Robert; Barge, Derek; Barnes, Virgil E; Barney, David; Barone, Luciano; Bartoloni, Alessandro; Baty, Clement; Bawa, Harinder Singh; Baiatian, G; Bandurin, Dmitry; Beauceron, Stephanie; Bell, Ken W; Bencze, Gyorgy; Benetta, Robert; Bercher, Michel; Beri, Suman Bala; Bernet, Colin; Berntzon, Lisa; Berthon, Ursula; Besançon, Marc; Betev, Botjo; Beuselinck, Raymond; Bhatnagar, Vipin; Bhatti, Anwar; Biino, Cristina; Blaha, Jan; Bloch, Philippe; Blyth, Simon; Bodek, Arie; Bornheim, Adolf; Bose, Suvadeep; Bose, Tulika; Bourotte, Jean; Brett, Angela Mary; Brown, Robert M; Britton, David; Budd, Howard; Bühler, M; Burchesky, Kyle; Busson, Philippe; Camanzi, Barbara; Camporesi, Tiziano; Cankocak, Kerem; Carrell, Kenneth Wayne; Carrera, E; Cartiglia, Nicolo; Cavallari, Francesca; Cerci, Salim; Cerutti, cM; Chang, Paoti; Chang, You-Hao; Charlot, Claude; Chen, E Augustine; Chen, Wan-Ting; Chen, Zheng-Yu; Chendvankar, Sanjay; Chipaux, Rémi; Choudhary, Brajesh C; Choudhury, Rajani Kant; Chung, Yeon Sei; Clarida, Warren; Cockerill, David J A; Combaret, Christophe; Conetti, Sergio; Cossutti, Fabio; Cox, Bradley; Cremaldi, Lucien Marcus; Cushman, Priscilla; Cussans, David; Dafinei, Ioan; Damgov, Jordan; Da Silva Di Calafiori, Diogo Raphael; Daskalakis, Georgios; Davatz, Giovanna; David, A; De Barbaro, Pawel; Debbins, Paul; Deiters, Konrad; Dejardin, Marc; Djordjevic, Milos; Deliomeroglu, Mehmet; Della Negra, Rodolphe; Della Ricca, Giuseppe; Del Re, Daniele; Demianov, A; De Min, Alberto; Denegri, Daniel; Depasse, Pierre; de Visser, Theo; Descamps, Julien; Deshpande, Pandurang Vishnu; Díaz, Jonathan; Diemoz, Marcella; Di Marco, Emanuele; Dimitrov, Lubomir; Dissertori, Günther; Dittmar, Michael; Djambazov, Lubomir; Dobrzynski, Ludwik; Drndarevic, Snezana; Duboscq, Jean Etienne; Dugad, Shashikant; Dumanoglu, Isa; Duru, Firdevs; Dutta, Dipanwita; Dzelalija, Mile; Efthymiopoulos, I; Elias, John E; Peisert, A; El-Mamouni, H; Elvira, D; Emeliantchik, Igor; Eno, Sarah Catherine; Ershov, Alexander; Erturk, Sefa; Esen, Selda; Eskut, Eda; Evangelou, Ioannis; Evans, David; Fabbro, Bernard; Faure, Jean-Louis; Fay, Jean; Fenyvesi, Andras; Ferri, Federico; Fisher, Wade Cameron; Flower, Paul S; Franci, Daniele; Franzoni, Giovanni; Freeman, Jim; Freudenreich, Klaus; Funk, Wolfgang; Ganjour, Serguei; Gargiulo, Corrado; Gascon, Susan; Gataullin, Marat; Gaultney, Vanessa; Gamsizkan, Halil; Gavrilov, Vladimir; Geerebaert, Yannick; Genchev, Vladimir; Gentit, François-Xavier; Gerbaudo, Davide; Gershtein, Yuri; Ghezzi, Alessio; Ghodgaonkar, Manohar; Gilly, Jean; Givernaud, Alain; Gleyzer, Sergei V; Gninenko, Sergei; Go, Apollo; Gobbo, Benigno; Godinovic, Nikola; Golubev, Nikolai; Golutvin, Igor; Goncharov, Petr; Gong, Datao; Govoni, Pietro; Grant, Nicholas; Gras, Philippe; Grassi, Tullio; Green, Dan; Greenhalgh, R J S; Gribushin, Andrey; Grinev, B; Guevara Riveros, Luz; Guillaud, Jean-Paul; Gurtu, Atul; Murat Guler, A; Gülmez, Erhan; Gümüs, K; Haelen, T; Hagopian, Sharon; Hagopian, Vasken; Haguenauer, Maurice; Halyo, Valerie; Hamel de Monchenault, Gautier; Hansen, Sten; Hashemi, Majid; Hauptman, John M; Hazen, Eric; Heath, Helen F; Heering, Arjan Hendrix; Heister, Arno; Heltsley, Brian; Hill, Jack; Hintz, Wieland; Hirosky, Robert; Hobson, Peter R; Honma, Alan; Hou, George Wei-Shu; Hsiung, Yee; Hunt, Adam; Husejko, Michal; Ille, Bernard; Ilyina, N; Imlay, Richard; Ingram, D; Ingram, Quentin; Isiksal, Engin; Jarry, Patrick; Jarvis, Chad; Jeong, Chiyoung; Jessop, Colin; Johnson, Kurtis F; Jones, John; Jovanovic, Dragoslav; Kaadze, Ketino; Kachanov, Vassili; Kaftanova, V; Kailas, Swaminathan; Kalagin, Vladimir; Kalinin, Alexey; Kalmani, Suresh Devendrappa; Karmgard, Daniel John; Kataria, Sushil Kumar; Kaur, Manjit; Kaya, Mithat; Kaya, Ozlem; Kayis-Topaksu, A; Kellogg, Richard G; Kennedy, Bruce W; Khmelnikov, Alexander; Kim, Heejong; Kisselevich, I; Kloukinas, Kostas; Kodolova, Olga; Kohli, Jatinder Mohan; Kokkas, Panagiotis; Kolberg, Ted; Kolossov, V; Korablev, Andrey; Korneev, Yury; Kosarev, Ivan; Kramer, Laird; Krasnikov, Nikolai; Krinitsyn, Alexander; Krokhotin, Andrey; Krpic, Dragomir; Kryshkin, V; Kubota, Yuichi; Kubrik, A; Kuleshov, Sergey; Kumar, Arun; Kumar, P; Kunori, Shuichi; Kuo, Chen-Cheng; Kurt, Pelin; Kyberd, Paul; Kyriakis, Aristotelis; Laasanen, Alvin T; Ladygin, Vladimir; Laird, Edward; Landsberg, Greg; Laszlo, Andras; Lawlor, C; Lazic, Dragoslav; Lebeau, Michel; Lecomte, Pierre; Lecoq, Paul; Ledovskoy, Alexander; Lee, Sang Joon; Leshev, Georgi; Lethuillier, Morgan; Levchuk, Leonid; Lin, Sheng-Wen; Lin, Willis; Linn, Stephan; Lintern, A L; Litvine, Vladimir; Litvintsev, Dmitri; Litov, Leander; Lobolo, L; Locci, Elizabeth; Lodge, Anthony B; Longo, Egidio; Loukas, Demetrios; Los, Serguei; Lubinsky, V; Luckey, Paul David; Lukanin, Vladimir; Lustermann, Werner; Lynch, Clare; Ma, Yousi; Machado, Emanuel; Mahlke-Krüger, H; Maity, Manas; Majumder, Gobinda; Malberti, Martina; Malclès, Julie; Maletic, Dimitrije; Mandjavidze, Irakli; Mans, Jeremy; Manthos, Nikolaos; Maravin, Yurii; Marchica, Carmelo; Marinelli, Nancy; Markou, Athanasios; Markou, Christos; Marlow, Daniel; Markowitz, Pete; Marone, Matteo; Martínez, German; Mathez, Hervé; Matveev, Viktor; Mavrommatis, Charalampos; Maurelli, Georges; Mazumdar, Kajari; Meridiani, Paolo; Merlo, Jean-Pierre; Mermerkaya, Hamit; Mescheryakov, G; Mestvirishvili, Alexi; Mikhailin, V; Milenovic, Predrag; Miller, Michael; Milleret, Gérard; Miné, Philippe; Möller, A; Mohammadi-Najafabadi, M; Mohanty, Ajit Kumar; Moissenz, P; Mondal, Naba Kumar; Moortgat, Filip; Mossolov, Vladimir; Mur, Michel; Musella, Pasquale; Musienko, Yuri; Nagaraj, P; Nardulli, Alessandro; Nash, Jordan; Nédélec, Patrick; Negri, Pietro; Newman, Harvey B; Nikitenko, Alexander; Norbeck, Edwin; Nessi-Tedaldi, Francesca; Obertino, Maria Margherita; Olson, Jonathan; Onel, Yasar; Onengüt, G; Organtini, Giovanni; Orimoto, Toyoko; Ozkan, Cigdem; Ozkurt, Halil; Ozkorucuklu, Suat; Ozok, Ferhat; Paganoni, Marco; Paganini, Pascal; Paktinat, S; Pal, Andras; Palma, Alessandro; Panev, Bozhidar; Pant, Lalit Mohan; Papadakis, Antonakis; Papadakis, Ioannis; Papadopoulos, Ioannis; Paramatti, Riccardo; Parracho, P; Pastrone, Nadia; Patil, Mandakini Ravindra; Patterson, Juliet Ritchie; Pauss, Felicitas; Penzo, Aldo; Petrakou, Eleni; Petrushanko, Sergey; Petrosian, A; Phillips II, David; Pikalov, Vladimir; Piperov, Stefan; Piroué, Pierre; Podrasky, V; Polatoz, A; Pompos, Arnold; Popescu, Sorina; Posch, C; Pozdnyakov, Andrey; Ptochos, Fotios; Puljak, Ivica; Pullia, Antonino; Punz, Thomas; Puzovic, Jovan; Qian, Weiming; Ragazzi, Stefano; Rahatlou, Shahram; Ralich, Robert; Rande, J; Razis, Panos A; Redaelli, Nicola; Reddy, L; Reidy, Jim; Renker, Dieter; Reucroft, Steve; Reymond, Jean-Marc; Ribeiro, Pedro Quinaz; Röser, Ulf; Rogalev, Evgueni; Rogan, Christopher; Roh, Youn; Rohlf, James; Romanteau, Thierry; Rondeaux, Françoise; Ronquest, Michael; Ronzhin, Anatoly; Rosowsky, André; Rovelli, Chiara; Ruchti, Randy; Rumerio, Paolo; Rusack, Roger; Rusakov, Sergey V; Ryan, Matthew John; Ryazanov, Anton; Safronov, Grigory; Sala, Leonardo; Salerno, Roberto; Sanders, David A; Santanastasio, Francesco; Sanzeni, Christopher; Sarycheva, Ludmila; Satyanarayana, B; Schinzel, Dietrich; Schmidt, Ianos; Seez, Christopher; Sekmen, Sezen; Semenov, Sergey; Senchishin, V; Sergeyev, S; Serin, Meltem; Sever, Ramazan; Sharp, Peter; Shepherd-Themistocleous, Claire; Siamitros, Christos; Sillou, Daniel; Singh, Jas Bir; Singovsky, Alexander; Sirois, Yves; Sirunyan, Albert M; Silva, J; Silva, Pedro; Skuja, Andris; Sharma, Seema; Sherwood, Brian; Shiu, Jing-Ge; Shivpuri, Ram Krishen; Shukla, Prashant; Shumeiko, Nikolai; Smirnov, Vitaly; Smith, Brian; Smith, Vincent J; Sogut, Kenan; Sonmez, Nasuf; Sorokin, Pavel; Spezziga, Mario; Sproston, Martin; Stefanovich, R; Stockli, F; Stolin, Viatcheslav; Sudhakar, Katta; Sulak, Lawrence; Suter, Henry; Suzuki, Ichiro; Swain, John; Tabarellide Fatis, T; Talov, Vladimir; Takahashi, Maiko; Tcheremoukhine, Alexandre; Teller, Olivier; Teplov, Konstantin; Theofilatos, Konstantinos; Thiebaux, Christophe; Thomas, Ray; Timciuc, Vladlen; Timlin, Claire; Titov, Maksym; Tobias, A; Tonwar, Suresh C; Topakli, Huseyin; Topkar, Anita; Triantis, Frixos A; Troshin, Sergey; Tully, Christopher; Turchanovich, L; Tyurin, Nikolay; Ueno, Koji; Ulyanov, A; Uzunian, Andrey; Vanini, A; Vankov, Ivan; Vardanyan, Irina; Varela, F; Varela, Joao; Vasil ev, A; Velasco, Mayda; Vergili, Mehmet; Verma, Piyush; Verrecchia, Patrice; Vesztergombi, Gyorgy; Veverka, Jan; Vichoudis, Paschalis; Vidal, Richard; Virdee, Tejinder; Vishnevskiy, Alexander; Vlassov, E; Vodopiyanov, Igor; Volobouev, Igor; Volkov, Alexey; Volodko, Anton; Von Gunten, Hans Peter; Wang, Lei; Wang, Minzu; Wardrope, David; Weber, Markus; Weng, Joanna; Werner, Jeremy Scott; Wetstein, Matthew; Winn, Dave; Wigmans, Richard; Williams, Jennifer C; Whitmore, Juliana; Won, Steven; Wu, Shouxiang; Yang, Yong; Yaselli, Ignacio; Yazgan, Efe; Yetkin, Taylan; Yohay, Rachel; Zabi, Alexandre; Zálán, Peter; Zamiatin, Nikolai; Zarubin, Anatoli; Zelepoukine, Serguei; Zeyrek, Mehmet; Zhang, Jia-Wen; Zhang, Lin; Zhu, Kejun; Zhu, Ren-Yuan

    2008-01-01

    The response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum range from 2 to 350 GeV/c has been measured. To our knowledge, this is the widest range of momenta in which any calorimeter system has been studied. These tests, carried out at the H2 beam-line at CERN, provide a wealth of information, especially at low energies. The analysis of the differences in calorimeter response to charged pions, kaons, protons and antiprotons and a detailed discussion of the underlying phenomena are presented. We also show techniques that apply corrections to the signals from the considerably different electromagnetic (EB) and hadronic (HB) barrel calorimeters in reconstructing the energies of hadrons. Above 5 GeV/c, these corrections improve the energy resolution of the combined system where the stochastic term equals 84.7$\\pm$1.6$\\%$ and the constant term is 7.4$\\pm$0.8$\\%$. The corrected mean response remains constant within 1.3$\\%$ rms.

  17. The CMS electromagnetic calorimeter barrel upgrade for High-Luminosity LHC

    CERN Document Server

    Obertino, Margherita Maria

    2014-01-01

    The High Luminosity LHC (HL-LHC) will provide unprecedented instantaneous and integrated luminosity. The lead tungstate crystals forming the barrel part of the CMS Electromagnetic Calorimeter (ECAL) will still perform well, even after the expected 3000fb-1 at the end of HL-LHC. The avalanche photodiodes (APDs) used to detect the scintillation light have recently been exposed to the levels of radiation expected at the end of HL-LHC. Although they will continue to be operational, there will be some increase in noise due to radiation-induced dark-currents. Triggering CMS with ~140 pileup events necessitates a change of the front-end electronics. New developments in high-speed optical links will allow single-crystal readout at 40 MHz. This will provide maximum flexibility and enhanced triggering possibilities when used in conjunction with upgraded off-detector processors. The very-front-end system will also be upgraded, to provide improved rejection of anomalous signals in the APDs as well as to mitigate the incr...

  18. The CMS electromagnetic calorimeter barrel upgrade for High-Luminosity LHC

    CERN Document Server

    Planer, Michael David

    2014-01-01

    The High Luminosity LHC (HL-LHC) will provide unprecedented instantaneous and integrated luminosity. The lead tungstate crystals forming the barrel part of the CMS Electromagnetic Calorimeter (ECAL) will still perform well, even after the expected 3000 fb-1 at the end of HL-LHC. The avalanche photodiodes (APDs) used to detect the scintillation light have recently been exposed to the levels of radiation expected at the end of HL-LHC. Although they will continue to be operational, there will be some increase in noise due to radiation-induced dark-currents. Triggering on electromagnetic objects with ~140 pileup events necessitates a change of the front-end electronics. New developments in high-speed optical links will allow single-crystal readout at 40 MHz to upgraded off-detector processors, allowing maximum flexibility and enhanced triggering capabilities. The very-front-end system will also be upgraded, to provide improved rejection of anomalous signals in the APDs as well as to mitigate the increase in APD n...

  19. Computer Simulation of the Cool Down of the ATLAS Liquid Argon Barrel Calorimeter

    CERN Document Server

    Korperud, N; Fabre, C; Owren, G; Passardi, Giorgio

    2002-01-01

    The ATLAS electromagnetic barrel calorimeter consists of a liquid argon detector with a total mass of 120 tonnes. This highly complicated structure, fabricated from copper, lead, stainless steel and glass-fiber reinforced epoxy will be placed in an aluminum cryostat. The cool down process of the detector will be limited by the maximum temperature differences accepted by the composite structure so as to avoid critical mechanical stresses. A computer program simulating the cool down of the detector by calculating the local heat transfer throughout a simplified model has been developed. The program evaluates the cool down time as a function of different contact gasses filling the spaces within the detector.

  20. ATLAS calorimeters: Run-2 performances and Phase-II upgrades

    CERN Document Server

    Boumediene, Djamel Eddine; The ATLAS collaboration

    2017-01-01

    The ATLAS detector was designed and built to study proton-proton collisions produced at the LHC at centre-of-mass energies up to 14 TeV and instantaneous luminosities up to $10^{34} cm^{-2} s^{-1}$. A Liquid Argon-lead sampling (LAr) calorimeter is employed as electromagnetic and hadronic calorimeters, except in the barrel region, where a scintillator-steel sampling calorimeter (TileCal) is used as hadronic calorimeter. This presentation gives first an overview of the detector operation and data quality, as well as of the achieved performances of the ATLAS calorimetry system. Additionally the upgrade projects of the ATLAS calorimeter system for the high luminosity phase of the LHC (HL-LHC) are presented. For the HL-LHC, the instantaneous luminosity is expected to increase up to $L \\simeq 7.5 × 10^{34} cm^{-2} s^{-1}$ and the average pile-up up to 200 interactions per bunch crossing. The major R&D item is the upgrade of the electronics for both LAr and Tile calorimeters in order to cope with longer latenc...

  1. Electron-based longitudinal weights for the ATLAS EM Barrel Calorimeter and shower isolation studies with an application to the $H \\ra ZZ^{(*)} \\ra 4e$ analysis

    CERN Document Server

    Mellado, B; Quayle, W; Wu, S

    2004-01-01

    In this note a full electron-based calibration of the Electromagnetic Barrel Calorimeter is performed. The improvement in resolution and linearity for electrons of energies ranging from 10 GeV up to the TeV scale is demostrated. A new general method is proposed which can be applied in multi-lepton final states where detector level information is exploited to discriminate between signal and background. The method is applied to the H->ZZ(*)->4e channel.

  2. Development of the timing branch electronics for the crystal barrel calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Klassen, Peter [Helmholtz-Institut fuer Strahlen- und Kernphysik, Nussallee 14-16, 53115 Bonn (Germany); Collaboration: CBELSA/TAPS-Collaboration

    2015-07-01

    The excitation spectrum of baryons consists of many resonances which contribute selectively to distinct decay channels. To be able to measure purely neutral reactions on a polarized neutron target with high efficiency, the Crystal Barrel Detector which consists of 1320 CsI(Tl) crystals has to be integrated into the first level trigger. This requires an exchange of the existing PIN photo diode by a new avalanche photo diode (APD) crystal readout. The APD readout electronics will provide a fast trigger signal down to 10 MeV energy deposit per crystal. The processing of these trigger signals requires an introduction of a previously not existent timing branch to the readout chain of the main calorimeter. The final concept and current development status of the timing back-end are presented. It utilizes FPGA based boards for rise time compensation, time to digital conversion and the cluster finding.

  3. Performance of the ATLAS Tile Calorimeter

    CERN Document Server

    Solodkov, Alexander; The ATLAS collaboration

    2015-01-01

    The Tile Calorimeter (TileCal), the central section of the hadronic calorimeter of the ATLAS experiment, is a key detector component to detect hadrons, jets and taus and to measure the missing transverse energy. Due to the very good muon signal to noise ratio it assists the spectrometer in the identification and reconstruction of muons. The calorimeter consists of thin steel plates and 460,000 scintillating tiles configured into 5182 cells, each viewed by two photomultipliers. The calorimeter response and its readout electronics is monitored to better than 1\\% using radioactive source, laser and charge injection systems. The performance of the calorimeter has been measured and monitored using calibration data, cosmic ray muons and the large sample of proton-proton collisions acquired in 2011 and 2012. The results demonstrate a very good understanding of the performance of the Tile Calorimeter that is well within the design expectations.

  4. Performance of the ATLAS Tile Calorimeter

    Directory of Open Access Journals (Sweden)

    Shimizu Shima

    2013-05-01

    Full Text Available The Tile Calorimeter is the central section of the ATLAS hadronic calorimeter at the Large Hadron Collider. It is a key detector for the measurement of hadrons, jets, tau leptons and missing transverse energy. Because of its very good signal to noise ratio it is also useful for the identification and reconstruction of muons. The calibration and performance of the calorimeter have been established through test beam measurements, cosmic ray muons and the large sample of pp collisions. Results on the calorimeter performance are presented, including the absolute energy scale, time resolution, and associated stabilities.

  5. LIQUID ARGON CALORIMETER PERFORMANCE AT HIGH RATES

    CERN Document Server

    Kukhtin, V; The ATLAS collaboration

    2011-01-01

    The performance of the ATLAS liquid argon endcap and forward calorimeters has been projected at the planned high luminosity LHC option HL-LHC by exposing small calorimeter modules of the electromagnetic, hadronic, and forward calorimeters to high intensity proton beams at IHEP/Protvino accelerator. The results of HV current and of pulse shape analysis, and also the dependence of signal amplitude on beam intensity are presented.

  6. ATLAS Calorimeters: Run-2 performance and Phase-II upgrade

    CERN Document Server

    Boumediene, Djamel Eddine; The ATLAS collaboration

    2017-01-01

    The ATLAS detector was designed and built to study proton-proton collisions produced at the LHC at centre-of-mass energies up to 14 TeV and instantaneous luminosities up to 10^{34} cm^{−2} s^{−1}. A liquid argon (LAr)-lead sampling calorimeter is employed as electromagnetic calorimeter and hadronic calorimter, except in the barrel region, where a scintillator-steel sampling calorimeter (TileCal) is used as hadronic calorimter. This presentation will give first an overview of the detector operation and data quality, as well as the achieved performance of the ATLAS calorimetry system. Additionally, the upgrade projects of the ATLAS calorimeter system for the high luminosity phase of the LHC (HL-LHC) will be presented. For the HL-LHC, the instantaneous luminosity is expected to increase up to L ≃ 7.5 × 10^{34} cm^{−2} s^{−1} and the average pile-up up to 200 interactions per bunch crossing. The major R&D item is the upgrade of the electronics for both LAr and Tile calorimeters in order to cope wit...

  7. Performance of the ATLAS Tile Calorimeter

    CERN Document Server

    Solodkov, Alexander; The ATLAS collaboration

    2015-01-01

    The ATLAS Tile hadronic calorimeter (TileCal) provides highly-segmented energy measurements of incoming particles. It is a key detector for the measurement of hadrons, jets, tau leptons and missing transverse energy. It is also useful for identification and reconstruction of muons due to good signal to noise ratio. The calorimeter consists of thin steel plates and 460,000 scintillating tiles configured into 5000 cells, each viewed by two photomultipliers. The calorimeter response and its readout electronics is monitored to better than 1% using radioactive source, laser and charge injection systems. The calibration and performance of the calorimeter have been established through test beam measurements, cosmic ray muons and the large sample of muons and single hadrons from proton-proton collisions acquired in 2011 and 2012. The results demonstrate that the Tile Calorimeter has performed well within the design requirements and it has given essential contribution to reconstructed objects and physics results.

  8. Performance of the PANDA Barrel DIRC prototype

    Energy Technology Data Exchange (ETDEWEB)

    Dzhygadlo, Roman; Gerhardt, Andreas; Lehmann, Dorothee; Schwarz, Carsten; Schwiening, Jochen [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Kalicy, Grzegorz; Patsyuk, Maria; Peters, Klaus; Zuehlsdorf, Marko [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Goethe-Universitaet, Frankfurt (Germany); Kumawat, Harphool [Bhabha Atomic Research Centre, Mumbai (India); Schepers, Georg [FAIR Facility for Antiproton and Ion Research in Europe GmbH, Darmstadt (Germany); Collaboration: PANDA-Collaboration

    2014-07-01

    Hadronic particle identification in the barrel region of the PANDA experiment at the new Facility for Antiproton and Ion Research in Europe (FAIR) at GSI, Darmstadt, will be provided by a DIRC (Detection of Internally Reflected Cherenkov light) counter. To test the performance of the barrel DIRC as well as different design options a prototype was build and successfully tested using a hadronic particle beam at CERN in 2012. The prototype comprised a radiator bar, focusing lens, mirror, and compact prism-shaped expansion volume made of solid synthetic fused silica. An array of micro-channel plate photomultiplier tubes measured the location and arrival time of the Cherenkov photons with sub-nanosecond resolution. The performance of the prototype during the beam test is presented including measurements of the photon yield and the Cherenkov angle resolution.

  9. A new avalanche photo diode based readout for the crystal barrel calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Urban, Martin [Helmholtz-Institut fuer Strahlen- und Kernphysik, Nussallee 14-16, 53115 Bonn (Germany); Collaboration: CBELSA/TAPS-Collaboration

    2015-07-01

    The CBELSA/TAPS experiment at ELSA has proven successful in the measurement of double polarization observables in meson photoproduction off protons and neutrons. To be able to measure purely neutral reactions on a polarized neutron target with high efficiency, the main calorimeter consisting of 1320 CsI(Tl) crystals has to be integrated into the first level trigger. Key requirement to achieve this goal is an exchange of the existing PIN photo diode by a new avalanche photo diode (APD) readout. The main advantage of the new readout system is that it will provide timing information which allows a fast trigger signal. The energy resolution will remain compatible to the previous system. Besides the development of automated test routines for the front end electronics, the characterization of all APDs was successfully accomplished in Bonn. After tests with a 3 x 3 CsI(Tl) crystal matrix at the tagged photon beam facilities at ELSA and MAMI the first half of the Crystal Barrel was upgraded in 2014. This talk shows the result of the latest test measurements including the gain stabilization of the new APD readout electronics and presents the progress of the ongoing upgrade.

  10. An FPGA-based sampling-ADC readout for the crystal barrel calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Muellers, Johannes [Helmholtz-Institut fuer Strahlen- und Kernphysik, Bonn (Germany); Marciniewski, Pawel [Angstroemlaboratoriet, Uppsala (Sweden); Collaboration: CBELSA/TAPS-Collaboration

    2015-07-01

    The CBELSA/TAPS experiment at the electron accelerator ELSA (Bonn) investigates the photoproduction of mesons off protons and neutrons. Presently the readout of the CsI(Tl)-crystals of the Crystal Barrel calorimeter is being upgraded from a PIN-diode readout to an APD readout to create a fast signal for first-level-triggering. This will increase the trigger efficiency especially for final states with only neutral particles substantially. To increase the possible data readout rate, which is currently limited by the digitization stage (LeCroy QDC 1885F) to ∼ 2 kHz, the implementation of a new Sampling-ADC (SADC) readout is being prepared. Based on the 64-channel PANDA-SADC, the CB-SADC design was modified and adapted to the needs of the CBELSA/TAPS experiment. It offers 64 channels in one NIM module, together with modular analog or FPGA-based digital shaping. The data transfer will be realized by two standard gigabit links. Using an FPGA together with SADCs provides a multitude of possibilities for online feature extraction, such as the determination of the energy deposited in the crystal, TDC capabilities and pile-up detection and recovery.

  11. The CMS barrel calorimeter response to particle beams from 2-GeV/c to 350-GeV/c

    Energy Technology Data Exchange (ETDEWEB)

    Abdullin, S.; /Moscow, ITEP; Abramov, V.; /Serpukhov, IHEP; Acharya, B.; /Tata Inst.; Adam, N.; /Princeton U.; Adams, M.; /Illinois U., Chicago; Adzic, P.; /Belgrade U.; Akchurin, N.; /Texas Tech.; Akgun, U.; Albayrak, E.; /Iowa U.; Alemany-Fernandez, R.; Almeida, N.; /Lisbon, LIFEP /Democritos Nucl. Res. Ctr. /Virginia U. /Iowa State U.

    2009-01-01

    The response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum range from 2 to 350 GeV/c has been measured. To our knowledge, this is the widest range of momenta in which any calorimeter system has been studied. These tests, carried out at the H2 beam-line at CERN, provide a wealth of information, especially at low energies. The analysis of the differences in calorimeter response to charged pions, kaons, protons and antiprotons and a detailed discussion of the underlying phenomena are presented. We also show techniques that apply corrections to the signals from the considerably different electromagnetic (EB) and hadronic (HB) barrel calorimeters in reconstructing the energies of hadrons. Above 5 GeV/c, these corrections improve the energy resolution of the combined system where the stochastic term equals 84.7 {+-} 1.6% and the constant term is 7.4 {+-} 0.8%. The corrected mean response remains constant within 1.3% rms.

  12. Performance of the ATLAS hadronic Tile calorimeter

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00304670; The ATLAS collaboration

    2016-01-01

    The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudorapidity < 1.7. The scintillation light produced in the scintillator tiles is transmitted to photomultiplier tubes (PMTs). Signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. Results on the calorimeter operation and performance are presented, including the calibration, stability, absolute energy scale, uniformity and time resolution. These results show that the TileCal performance is within the design requirements and has given essential contribution to reconstructed objects and physics results.

  13. Performance of the ATLAS Tile Calorimeter

    Science.gov (United States)

    Hrynevich, A.

    2017-06-01

    The Tile Calorimeter (TileCal) is the central scintillator-steel sampling hadronic calorimeter of the ATLAS experiment at the LHC . Jointly with other calorimeters it is designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal frontend electronics reads out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV . Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the calorimeter has been established with cosmic ray muons and the large sample of the proton-proton collisions. The response of high momentum isolated muons is used to study the energy response at the electromagnetic scale, isolated hadrons are used as a probe of the hadronic response and its modelling by the Monte Carlo simulations. The calorimeter time resolution is studied with multijet events. Results on the calorimeter operation and performance are presented, including the calibration, stability, absolute energy scale, uniformity and time resolution. These results show that the TileCal performance is within the design requirements and has given essential contribution to reconstructed objects and physics results.

  14. The ATLAS Tile Calorimeter performance at LHC

    CERN Document Server

    Cuciuc, M; The ATLAS collaboration

    2012-01-01

    The Tile Calorimeter (TileCal), the central section of the hadronic calorimeter of the ATLAS experiment, is a key detector component to detect hadrons, jets and taus and to measure the missing transverse energy. Due to the very good muon signal to noise ratio it assists the spectrometer in the identification and reconstruction of muons. TileCal is built of steel and scintillating tiles coupled to optical fibers and read out by photomultipliers. The calorimeter is equipped with systems that allow to monitor and to calibrate each stage of the readout system exploiting different signal sources: laser light, charge injection and a radioactive source. The calorimeter performance and its stability has been evaluated with the rich sample of collision data in 2011 but also with calibration data, random triggered data, cosmic muons and splash events. Results on the absolute energy scale calibration precision, on the energy and timing uniformity, on the time resolution and on the synchronization precision are presented...

  15. Performance of the ATLAS hadronic Tile calorimeter

    CERN Document Server

    Bartos, Pavol; The ATLAS collaboration

    2016-01-01

    Performance of the ATLAS hadronic Tile calorimeter The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudorapidity < 1.7. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal frontend electronics reads out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the calorimeter have been studied in-situ employing cosmic ray muons and a large sample of proton-proton collisions acquired during the operations o...

  16. The ATLAS Tile Calorimeter performance at LHC

    Science.gov (United States)

    Molander, Simon

    2014-05-01

    This paper gives an overview of the performance of the Tile Calorimeter of the ATLAS detector at the Large Hadron Collider. Detector performances with respect to electronic noise and cell response are presented. In addition, an overview of the partially overlapping calibration systems is given.

  17. Analysis results of the April 1996 combined test of the LArgon and TILECAL barrel calorimeter prototypes

    CERN Document Server

    Cobal, M; Costanzo, D; David, M; Davidek, T; Efthymiopoulos, I; Khubua, J I; Kulchitskii, Yu A; Kuzmin, M V; Lund-Jensen, B; Leitner, R; Mazzoni, E; Mosidze, M; Némécek, S; Nessi, Marzio; Pantea, D; Sala, P; Solodkov, A; Stanek, B; Vichou, I

    1998-01-01

    In April 1996 a second combined electromagnetic and hadronic ATLAS calorimeter prototype test beam was performed. The response to pions and electrons of various energies (10, 20, 40, 50, 80, 100, 150 and 300~GeV) at an incident $\\theta$ angle of $12^0$ was investigated. The energy released by pions in the prototype was reconstructed using a minimal set of corrections introduced to take into account various detector effects ("benchmark" approach). A weighting method 'a la H1' was applied too. Energy resolution, $e$/$\\pi$ and linearity were calculated. Finally, the transverse and longitudinal pion shower developments were examined as well as the longitudinal leakage. The signal released by muons was analyzed. The noise was evaluated for both the detectors. The results were compared with those obtained in the previous combined test beam, performed in September 1994.

  18. Understanding the performance of CMS calorimeter

    Indian Academy of Sciences (India)

    Seema Sharma; on behalf of the CMS Collaboration

    2007-12-01

    The performance of the CMS hadron calorimeter is studied using test beam facilities at CERN. Two wedges of brass-scintillator calorimeter are exposed to negative and positive beams with momenta between 3 and 300 GeV/c. Light produced in the scintillators are collected using wavelength shifting fibres and read out using hybrid photo-diodes. Each of the wedges has 17 layers of scintillators. In one of these wedges signal from all 17 layers are grouped together while in the other each layer is read out separately. The response, energy resolution, longitudinal and lateral shower profiles are measured.

  19. Performance of prototypes for the PANDA barrel EMC

    Science.gov (United States)

    Bremer, D. A.; Eissner, T.; Drexler, P.; Moritz, M.; Novotny, R. W.; PANDA Collaboration

    2015-02-01

    The PANDA experiment will be part of the future Facility for Antiproton and Ion Research (FAIR) and aims for the study of strong interaction within the charm sector via antiproton proton collisions up to antiproton momenta of 15 GeV/c. Reflecting the variety of the physics program the PANDA detector is designed as a multi-purpose detector able to perform tracking, calorimetry and particle identification with nearly complete coverage of the solid angle. The Electromagnetic Calorimeter (EMC) contained inside its Target Spectrometer is based on cooled PbWO4 scintillator crystals. In order to ensure an excellent performance throughout the large dynamic range of photon/electron energies ranging from a few MeV up to 15 GeV an extensive prototyping phase is mandatory. This contribution describes the measured response of the EMC barrel part prototype PROTO60 at the largest design energy to secondary beams provided by the SPS at CERN. In addition to PROTO60 a tracking station was deployed, providing precise position information of the 15 GeV/c positrons. For calibration purposes a 150 GeV/c muon beam and cosmic radiation, in combination with estimations from GEANT4 simulations were used. The obtained performance concerning energy, position and time information is presented.

  20. ATLAS Tile Calorimeter extended barrel side C, assembly and installation in the cavern.

    CERN Multimedia

    Nikolai Topilin

    2009-01-01

    These photos belong to the self-published book by Nikolai Topilin "ATLAS Hadron Calorimeter Assembly". The book is a collection of souvenirs from the years of assembly and installation of the Tile Hadron Calorimeter, which extended from November 2002 until May 2006.

  1. ATLAS Tile Calorimeter extended barrel Side A assembly and installation in the cavern.

    CERN Multimedia

    Nikolai Topilin

    2009-01-01

    These photos belong to the self-published book by Nikolai Topilin "ATLAS Hadron Calorimeter Assembly". The book is a collection of souvenirs from the years of assembly and installation of the Tile Hadron Calorimeter, which extended from November 2002 until May 2006.

  2. Performance of the ATLAS Tile Calorimeter

    CERN Document Server

    Hrynevich, Aliaksei; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) is the central scintillator-steel sampling hadronic calorimeter of the ATLAS experiment at the LHC. Jointly with other calorimeters it is designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal frontend electronics reads out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the calorimeter has been established with cosmic ray muons and the large sample of the proton-proton collisions. The response of high momentum isolated muons is used to study the energy response at the electromagnetic scale, isolated hadr...

  3. Performance of the ATLAS hadronic Tile calorimeter

    CERN Document Server

    Mlynarikova, Michaela; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for reconstruction of hadrons, jets, tau-particles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudorapidity < 1.7. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal frontend electronics reads out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the calorimeter has been studied in-situ employing cosmic ray muons and a large sample of proton-proton collisions acquired during the operations of the LHC. Prompt isolated muons of high momentum from elec...

  4. Performance of the ATLAS hadronic Tile calorimeter

    CERN Document Server

    Mlynarikova, Michaela; The ATLAS collaboration

    2017-01-01

    The ATLAS Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for reconstruction of hadrons, jets, tau-particles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudorapidity < 1.7. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal frontend electronics reads out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the calorimeter has been studied in-situ employing cosmic ray muons and a large sample of proton-proton collisions acquired during the operations of the LHC. Prompt isolated muons of high momentum fro...

  5. Performance of a shashlik calorimeter at LEP II

    CERN Document Server

    Ferrari, P; Klovning, A; Maeland, O A; Stugu, B; Benvenuti, Alberto C; Giordano, V; Guerzoni, M; Navarria, Francesco Luigi; Verardi, M G; Camporesi, T; Bozzo, M; Cereseto, R; Barreira, G; Espirito-Santo, M C; Maio, A; Onofre, A; Peralta, L; Pimenta, M; Tomé, B; Carling, H; Falk, E; Hedberg, V; Jarlskog, G; Kronkvist, I J; Bonesini, M; Chignoli, F; Gumenyuk, S A; Leoni, R; Mazza, R; Negri, P; Paganoni, M; Petrovykh, L P; Terranova, F; Dharmasiri, D R; Nossum, B; Read, A L; Skaali, T B; Castellani, L; Pegoraro, M; Fenyuk, A; Guz, Yu; Karyukhin, A N; Konoplyannikov, A K; Obraztsov, V F; Shalanda, N A; Vlasov, E; Zaitsev, A; Bigi, M; Cassio, V; Gamba, D; Migliore, E; Romero, A; Simonetti, L; Torassa, E; Trapani, P P; Bari, M D; Della Ricca, G; Lanceri, L; Poropat, P; Prest, M; Vallazza, E

    1999-01-01

    The small angle tile calorimeter (STIC) is a sampling lead- scintillator calorimeter, built with "shashlik" technique. Results are presented from extensive studies of the detector performance at LEP. (5 refs).

  6. Performance of the CMS Hadron Calorimeter with Cosmic Ray Muons and LHC Beam Data

    CERN Document Server

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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 Hadron Calorimeter in the barrel, endcap and forward regions is fully commissioned. Cosmic ray data were taken with and without magnetic field at the surface hall and after installation in the experimental hall, hundred meters underground. Various measurements were also performed during the few days of beam in the LHC in September 2008. Calibration parameters were extracted, and the energy response of the HCAL determined from test beam data has been checked.

  7. Performance of the CMS Hadron Calorimeter with Cosmic Ray Muons and LHC Beam Data

    CERN Document Server

    Chatrchyan, S; 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; 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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 Hadron Calorimeter in the barrel, endcap and forward regions is fully commissioned. Cosmic ray data were taken with and without magnetic field at the surface hall and after installation in the experimental hall, hundred meters underground. Various measurements were also performed during the few days of beam in the LHC in September 2008. Calibration parameters were extracted, and the energy response of the HCAL determined from test beam data has been checked.

  8. Design, Performance, and Calibration of the CMS Hadron-Outer Calorimeter

    CERN Document Server

    Abdullin, Salavat; Acharya, Bannaje Sripathi; Adam, Nadia; Adams, Mark Raymond; Akchurin, Nural; Akgun, Ugur; Albayrak, Elif Asli; Anderson, E Walter; Antchev, Georgy; Arcidy, M; Ayan, S; Aydin, Sezgin; Aziz, Tariq; Baarmand, Marc M; Babich, Kanstantsin; Baden, Drew; Bakirci, Mustafa Numan; Banerjee, Sunanda; Banerjee, Sudeshna; Bard, Robert; Barnes, Virgil E; Bawa, Harinder Singh; Baiatian, G; Bencze, Gyorgy; Beri, Suman Bala; Berntzon, Lisa; Bhatnagar, Vipin; Bhatti, Anwar; Bodek, Arie; Bose, Suvadeep; Bose, Tulika; Budd, Howard; Burchesky, Kyle; Camporesi, Tiziano; Cankocak, Kerem; Carrell, Kenneth Wayne; Cerci, Salim; Chendvankar, Sanjay; Chung, Yeon Sei; Clarida, Warren; Cremaldi, Lucien Marcus; Cushman, Priscilla; Damgov, Jordan; De Barbaro, Pawel; Debbins, Paul; Deliomeroglu, Mehmet; Demianov, A; de Visser, Theo; Deshpande, Pandurang Vishnu; Díaz, Jonathan; Dimitrov, Lubomir; Dugad, Shashikant; Dumanoglu, Isa; Duru, Firdevs; Efthymiopoulos, I; Elias, John E; Elvira, D; Emeliantchik, Igor; Eno, Sarah Catherine; Ershov, Alexander; Erturk, Sefa; Esen, Selda; Eskut, Eda; Fenyvesi, Andras; Fisher, Wade Cameron; Freeman, Jim; Ganguli, Som N; Gaultney, Vanessa; Gamsizkan, Halil; Gavrilov, Vladimir; Genchev, Vladimir; Gleyzer, Sergei V; Golutvin, Igor; Goncharov, Petr; Grassi, Tullio; Green, Dan; Gribushin, Andrey; Grinev, B; Gurtu, Atul; Murat Güler, A; Gülmez, Erhan; Gümüs, K; Haelen, T; Hagopian, Sharon; Hagopian, Vasken; Halyo, Valerie; Hashemi, Majid; Hauptman, John M; Hazen, Eric; Heering, Arjan Hendrix; Heister, Arno; Hunt, Adam; Ilyina, N; Ingram, D; Isiksal, Engin; Jarvis, Chad; Jeong, Chiyoung; Johnson, Kurtis F; Jones, John; Kaftanov, Vitali; Kalagin, Vladimir; Kalinin, Alexey; Kalmani, Suresh Devendrappa; Karmgard, Daniel John; Kaur, Manjit; Kaya, Mithat; Kaya, Ozlem; Kayis-Topaksu, A; Kellogg, Richard G; Khmelnikov, Alexander; Kim, Heejong; Kisselevich, I; Kodolova, Olga; Kohli, Jatinder Mohan; Kolossov, V; Korablev, Andrey; Korneev, Yury; Kosarev, Ivan; Kramer, Laird; Krinitsyn, Alexander; Krishnaswamy, Marthi Ramaswamy; Krokhotin, Andrey; Kryshkin, V; Kuleshov, Sergey; Kumar, Arun; Kunori, Shuichi; Laasanen, Alvin T; Ladygin, Vladimir; Laird, Edward; Landsberg, Greg; Laszlo, Andras; Lawlor, C; Lazic, Dragoslav; Lee, Sang Joon; Levchuk, Leonid; Linn, Stephan; Litvintsev, Dmitri; Lobolo, L; Los, Serguei; Lubinsky, V; Lukanin, Vladimir; Ma, Yousi; Machado, Emanuel; Maity, Manas; Majumder, Gobinda; Mans, Jeremy; Marlow, Daniel; Markowitz, Pete; Martínez, German; Mazumdar, Kajari; Merlo, Jean-Pierre; Mermerkaya, Hamit; Mescheryakov, G; Mestvirishvili, Alexi; Miller, Michael; Möller, A; Mohammadi-Najafabadi, M; Moissenz, P; Mondal, Naba Kumar; Mossolov, Vladimir; Nagaraj, P; Narasimham, Vemuri Syamala; Norbeck, Edwin; Olson, Jonathan; Onel, Yasar; Onengüt, G; Ozkan, Cigdem; Ozkurt, Halil; Ozkorucuklu, Suat; Ozok, Ferhat; Paktinat, S; Pal, Andras; Patil, Mandakini Ravindra; Penzo, Aldo; Petrushanko, Sergey; Petrosian, A; Pikalov, Vladimir; Piperov, Stefan; Podrasky, V; Polatoz, A; Pompos, Arnold; Popescu, Sorina; Posch, C; Pozdnyakov, Andrey; Qian, Weiming; Ralich, Robert; Reddy, L; Reidy, Jim; Rogalev, Evgueni; Roh, Youn; Rohlf, James; Ronzhin, Anatoly; Ruchti, Randy; Ryazanov, Anton; Safronov, Grigory; Sanders, David A; Sanzeni, Christopher; Sarycheva, Ludmila; Satyanarayana, B; Schmidt, Ianos; Sekmen, Sezen; Semenov, Sergey; Senchishin, V; Sergeyev, S; Serin, Meltem; Sever, Ramazan; Singh, B; Singh, Jas Bir; Sirunyan, Albert M; Skuja, Andris; Sharma, Seema; Sherwood, Brian; Shumeiko, Nikolai; Smirnov, Vitaly; Sogut, Kenan; Sonmez, Nasuf; Sorokin, Pavel; Spezziga, Mario; Stefanovich, R; Stolin, Viatcheslav; Sudhakar, Katta; Sulak, Lawrence; Suzuki, Ichiro; Talov, Vladimir; Teplov, Konstantin; Thomas, Ray; Tonwar, Suresh C; Topakli, Huseyin; Tully, Christopher; Turchanovich, L; Ulyanov, A; Vanini, A; Vankov, Ivan; Vardanyan, Irina; Varela, F; Vergili, Mehmet; Verma, Piyush; Vesztergombi, Gyorgy; Vidal, Richard; Vishnevskiy, Alexander; Vlassov, E; Vodopiyanov, Igor; Volobouev, Igor; Volkov, Alexey; Volodko, Anton; Wang, Lei; Werner, Jeremy Scott; Wetstein, Matthew; Winn, Dave; Wigmans, Richard; Whitmore, Juliana; Wu, Shouxiang; Yazgan, Efe; Yetkin, Taylan; Zálán, Peter; Zarubin, Anatoli; Zeyrek, Mehmet

    2008-01-01

    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 an outer calorimeter to ensure high energy shower containment in the calorimeter. Fabrication, testing and calibration 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 will also be used for the muon trigger in coincidence with other muon chambers in CMS.

  9. Performances of the AMS-02 Electromagnetic Calorimeter

    Science.gov (United States)

    Adloff, C.; Coignet, G.; Girard, L.; Goy, C.; Kossakowski, R.; Lees-Rosier, S.; Pochon, J.; Vialle, J. P.; Cervelli, F.; di Falco, S.; Galeotti, S.; Incagli, M.; Pedreschi, E.; Spinella, F.; Venanzoni, G.; Falchini, E.; Maestro, P.; Marrocchesi, P. S.; Paoletti, R.; Pilo, F.; Turini, N.; Valle, G.; Bolmont, J.; Jacholkowska, A.; Piron, F.; Sapinski, M.; Chen, G.; Chen, G.; Chen, H. S.; Lu, Y.; Yang, C.

    2004-07-01

    A 3D imaging electromagnetic calorimeter (ECAL) made of scintillating fibers embedded in lead has been developed for the AMS-02 experiment to be installed on the International Space Station. A full scale ECAL prototype, partially instrumented, was tested in July 2002 in a beam at CERN. Several million events were recorded using muon, electron, proton, and antiproton beams, from which the ECAL behavior was determined. Results on the measurement of the ECAL parameters and performances are presented : radiation length, linearity, energy and angular resolutions, e/p separation.

  10. Calorimeter detectors

    CERN Document Server

    de Barbaro, P; The ATLAS collaboration

    2013-01-01

    Although the instantaneous and integrated luminosity in HL-LHC will be far higher than the LHC detectors were originally designed for, the Barrel calorimeters of the four experiments are expected to continue to perform well  throughout the Phase II program. The conditions for the End-Cap calorimeters are far more challenging and whilst some detectors will require relatively modest changes, others require far more substantial upgrades. We present the results of longevity and performance studies for the calorimeter systems of the four main LHC experiments and outline the upgrade options under consideration. We include a discussion of the R&D required to make the final technology choices for the upgraded detectors.

  11. Performance of the CMS precision electromagnetic calorimeter at the LHC Run II and prospects for high-luminosity LHC

    CERN Document Server

    Negro, Giulia

    2017-01-01

    The Compact Muon Solenoid (CMS) electromagnetic calorimeter (ECAL) is a high-performance calorimeter wich will operate also at the High Luminosity Large Hadron Collider (HL-LHC). This talk will describe the strategies that have been employed to maintain the excellent performance of the CMS ECAL throughout Run 2. Performance results from the 2015-2016 data taking periods will be shown and an outlook on the expected Run 2 performance in the years to come will be provided. The status and plans for the upgraded ECAL barrel electronics for the HL-LHC will be presented, based on recent results from simulations, laboratory tests, and test beam measurements of prototype devices.

  12. Liquid Argon Calorimeter - Barrel Cryostat Construction and Testing May-June 2000

    CERN Multimedia

    US, ATLAS

    1999-01-01

    Photo 1 - Outer Cold Cryostat showing 'Y' support. Photo 2 - Outer Cold Vessel half showing 'X' and 'Z' stops and 'Y' supports. Photo 3 - Cold Vessel Bulkhead, End 'C'. Photo 4 - Outer Cold Vessel half, showing EM Calorimeter support rail. Photo 5 - End of Outer Cold Vessel showing EM Calorimeter support rail. Photo 6 - Al/SST Transitions for Signal and High Voltage feedthroughs. Test weld blocks shown in background. Photo 7 - Welding of Al/SST Transitions onto Outer Cold Vessel. Photo 8 - Al/SST Transitions, including test pumpouts. Photo 9 - Machining of Inner Cold vessel. Photo 10 - Warm Vessel being assembled for leak testing Photo 11 - Setting up Warm Vessel on test stand. Photo 12 - Warm Vessel assembly for testing complete. Photo 13 - Dial indicators mounted against the Warm Vessel Bulkhead during testing. Photo 14 - Pumping on Warm Vessel. Photo 15 - Pumping on the Warm Vessel. Photo 16 - Checking the Solenoid Chimney. Photo 17 - Leak checking the Inner Warm Vessel/Bulkhead flange in the area of ID co...

  13. Performance of the ATLAS Liquid Argon Calorimeter After Three Years of LHC Operation and Plans for a Future Upgrade

    CERN Document Server

    Ilic, N; The ATLAS collaboration

    2013-01-01

    The ATLAS experiment is a multi-purpose detector built for analyzing LHC collision data. In July 2012, ATLAS announced the discovery of the Higgs boson, the last undiscovered particle in the Standard Model of particle physics. The ATLAS Liquid Argon (LAr) Calorimeter played a crucial role in the discovery by providing accurate measurements of Higgs final states such as photons, electrons and jets. The LAr detector is a sampling calorimeter consisting of four subsystems: an electromagnetic barrel (EMB), electromagnetic end-caps (EMEC), hadronic end-caps (HEC), and forward calorimeters (FCAL). The liquid argon purity, temperature and time stability remained well above the required levels throughout the data-taking period. Overall the calorimeter performed very well, with over 99% of data it collected in 2012 proton-proton collisions being suitable for physics analysis. In order to maintain good LAr detector performance, several upgrades are currently being implemented and planned.

  14. Performance of the upgraded small angle tile calorimeter at LEP

    CERN Document Server

    Alvsvaag, S J; Barreira, G; Benvenuti, Alberto C; Bigi, M; Bonesini, M; Bozzo, M; Camporesi, T; Carling, H; Cassio, V; Castellani, L; Cereseto, R; Chignoli, F; Della Ricca, G; Dharmasiri, D R; Espirito-Santo, M C; Falk, E; Fenyuk, A; Ferrari, P; Gamba, D; Giordano, V; Guz, Yu; Guerzoni, M; Gumenyuk, S A; Hedberg, V; Jarlskog, G; Karyukhin, A N; Klovning, A; Konoplyannikov, A K; Kronkvist, I J; Lanceri, L; Leoni, R; Maeland, O A; Maio, A; Mazza, R; Migliore, E; Navarria, Francesco Luigi; Nossum, B; Obraztsov, V F; Onofre, A; Paganoni, M; Pegoraro, M; Peralta, L; Petrovykh, L P; Pimenta, M; Poropat, P; Prest, M; Read, A L; Romero, A; Shalanda, N A; Simonetti, L; Skaali, T B; Stugu, B; Terranova, F; Tomé, B; Torassa, E; Trapani, P P; Verardi, M G; Vallazza, E; Vlasov, E; Zaitsev, A

    1998-01-01

    The small angle tile calorimeter (STIC) provides calorimetric coverage in the very forward region of the DELPHI experiment at the CERN LEP collider. The structure of the calorimeters, built with so- called "shashlik" technique, $9 allows the insertion of tracking detectors within the sampling structure, in order to make it possible to determine the direction of the showering particle. Presented here are some results demonstrating the performance of the $9 calorimeter and of these tracking detectors at LEP. (5 refs).

  15. Performance of the prototype readout system for the CMS endcap hadron calorimeter upgrade

    CERN Document Server

    AUTHOR|(CDS)2080106

    2016-01-01

    The CMS experiment at the CERN Large Hadron Collider (LHC) will upgrade the photon detection and readout systems of its barrel and endcap hadron calorimeters (HCAL) through the second long shutdown of the LHC in 2018. The upgrade includes new silicon photomultipliers (SiPMs), SiPM control electronics, signal digitization via the Fermilab QIE11 ASIC, data formatting and serialization via a Microsemi FPGA, and data transmission via CERN Versatile Link technology. The first prototype system for the endcap HCAL has been assembled and characterized on the bench and in a test beam. The design of this new system and prototype performance is described.

  16. Performance of the CREAM calorimeter in accelerator beam test

    CERN Document Server

    Yoon, Y S; Bagliesi, M G; Bigongiari, G; Ganel, O; Han, J H; Hyun, H J; Jeon, J A; Kang, T G; Kim, H J; Kim, K C; Lee, J K; Lee, M H; Lutz, L; Maestro, P; Malinine, A; Marrocchesi, P S; Nam, S W; Park, H; Park, I H; Park, N H; Seo, E S; Sina, R; Wu, J; Yang, J; Zei, R; Zinn, S Y

    2010-01-01

    The CREAM calorimeter, designed to measure the spectra of cosmic-ray nuclei from under 1 TeV to 1000 TeV, is a 20 radiation length (X0) deep sampling calorimeter. The calorimeter is comprised of 20 layers of tungsten interleaved with 20 layers of scintillating fiber ribbons, and is preceded by a pair of graphite interaction targets providing about 0.42 proton interaction lengths (\\lambda int). The calorimeter was placed in one of CERN's SPS accelerator beams for calibration and testing. Beams of 150 GeV electrons were used for calibration, and a variety of electron, proton, and nuclear fragment beams were used to test the simulation model of the detector. In this paper we discuss the performance of the calorimeter in the electron beam and compare electron beam data with simulation results.

  17. Performance of a uranium/tetramethylpentane calorimeter backed by an iron/scintillator calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Apsimon, R.; Bacci, C.; Bauer, G.; Bezaguet, A.; Bloess, D.; Bodenes, J.M.; Bonino, R.; Buchanan, C.; Busetto, G.; Caner, A.; Casoli, L.; Castilla-Valdez, H.; Cavanna, F.; Cennini, P.; Centro, S.; Ceradini, F.; Conte, R.; Della Negra, M.; DiCiaccio, A.; De Giorgi, M.; Diez-Hedo, F.J.; Drijard, D.; Dumps, L.; Evans, H.; Ferrando, A.; Fuess, T.; Givernaud, A.; Gonidec, A.; Gronberg, J.; Josa, M.I.; Kienzle, W.; Krammer, M.; Lavaca, F.; Lindgren, M.; Marchand, D.; Martinelli, R.; Maurin, G.; Meneguzzo, A.; Mohammadi, M.; Morgan, K.; Munoz, R.C.; Naumann, L.; Nedelec, P.; Otwinowski, S.; Petrolo, E.; Piano-Mortari, G.; Placci, A.; Pontecorvo, L.; Radermacher, E.; Revol, J.P.; Robinson, D.; Rodrigo, T.; Rubbia, C.; Schinzel, D.; Schmidt, W.F.; Seez, C.; Seidl, W.; Stork, D.; Stubenrauch, C.; Sumorok, K.; Tan, Q.H.; Tether, S.; Teykal, H.; Torrente-Lujan, E.; Ullaland, O.; Guchte, M.W. van de; Veneziano, S.; Virdee, T.S.; Vuillemin, V.; Walzel, G.; Winterter, I.; Wu, X.; Zotto, P.L.; UA1 Collaboration

    1991-07-20

    We present results from the barrel depleted uranium/TMP calorimeter modules constructed by the UA1 Collaboration. Electromagnetic and hadronic energy resolutions have been measured using electron and pion beams with momenta in the range 7 to 70 GeV/c. Results on the energy linearity and the spatial uniformity of response are reported. The electromagnetic shower position resolution has been measured as a function of energy using a fine grained position detector placed at a depth of {proportional to}3.5 X{sub 0}. The noise arising both from the electronics chain and from the uranium radioactivity is compared with 70 GeV/c muon signals. The ratio of the electron to pion response has been measured both as a function of the energy and of the electric field. The high lateral and longitudinal granularity of the calorimeter and the presence of a position detector have been used to determine the electron-pion separation as a function of energy. (orig.).

  18. Performances of the AMS-02 electromagnetic calorimeter

    CERN Document Server

    Cervelli, F; Lomtadze, T A; Venanzoni, G; Falchini, E; Maestro, P; Marrocchesi, P S; Paoletti, R; Pilo, F; Turini, N; Valle, G D; Coignet, G; Girard, L; Goy, C; Kossakowski, R; Lees-Rosier, S; Vialle, J P; Chen, G; Chen, H; Liu, Z; Lu, Y; Yu, Z; Zhuang, H L

    2002-01-01

    A full-scale prototype of the e.m. calorimeter for the AMS-02 experiment was tested at CERN in October 2001 using 100 GeV pion and electron beams with energy ranging from 3 to 100 GeV. The detector, a lead-scintillating fiber sampling calorimeter about 17 radiation lengths deep, is read out by an array of multianode photomultipliers. The calorimeter's high granularity allows to image the longitudinal and lateral showers development, a key issue to provide high electron /hadron discrimination. From the test beam data, linearity and energy resolution were measured as well as the effective sampling thickness. The latter was extracted from the data by fitting the longitudinal e.m. shower profiles at different energies. (9 refs).

  19. ATLAS Tile Calorimeter performance with Run 1 data

    Energy Technology Data Exchange (ETDEWEB)

    Cerdá Alberich, L., E-mail: lcerdaal@cern.ch

    2016-07-11

    The performance of the central hadronic calorimeter, TileCal, in the ATLAS Experiment at the Large Hadron Collider is studied using cosmic-ray muons and the large sample of proton-proton collisions acquired during the Run 1 of LHC (2010–2012). Results are presented for the precision of the absolute energy scale and timing, noise characterization, and time-stability of the detector. The results show that the Tile Calorimeter performance is within the design requirements of the detector.

  20. Performance of CREAM Calorimeter Results of Beam Tests

    CERN Document Server

    Ahn, H S; Beatty, J J; Bigongiari, G; Castellina, A; Childers, J T; Conklin, N B; Coutu, S; Duvernois, M A; Ganel, O; Han, J H; Hyun, H J; Kang, T G; Kim, H J; Kim, K C; Kim, M Y; Kim, T; Kim, Y J; Lee, J K; Lee, M H; Lutz, L; Maestro, P; Malinine, A; Marrocchesi, P S; Mognet, S I; Nam, S W; Nutter, S; Park, N H; Park, H; Seo, E S; Sina, R; Syed, S; Song, C; Swordy, S; Wu, J; Yang, J; Zhang, H Q; Zei, R; Zinn, S Y

    2005-01-01

    The Cosmic Ray Energetics And Mass (CREAM), a balloon-borne experiment, is under preparation for a flight in Antarctica at the end of 2004. CREAM is planned to measure the energy spectrum and composition of cosmic rays directly at energies between 1 TeV and 1000 TeV. Incident particle energies will be measured by a transition radiation detector and a sampling calorimeter. The calorimeter was constructed at the University of Maryland and tested at CERN in 2003. Performance of the calorimeter during the beam tests is reported.

  1. Radiation Hardness Tests of SiPMs for the JLab Hall D Barrel Calorimeter

    CERN Document Server

    Qiang, Yi; Barbosa, Fernando; Smith, Elton

    2012-01-01

    We report on the measurement of the neutron radiation hardness of silicon photomultipliers (SiPMs) manufactured by Hamamatsu Corporation in Japan and SensL in Ireland. Samples from both companies were irradiated by neutrons created by a 1 GeV electron beam hitting a thin lead target at Jefferson Lab Hall A. More tests regarding the temperature dependence of the neutron radiation damage and self-annealing were performed on Hamamatsu SiPMs using a calibrated Am-Be neutron source from the Jefferson Lab Radiation Control group. As the results of all irradiation, both dark current and dark noise increase linearly as a function of the 1 MeV equivalent neutron fluence and a temperature dependent self-annealing effect is observed together with the radiation damage.

  2. Performances of the ATLAS Hadronic Tile Calorimeter Modules for Electrons and Pions

    CERN Document Server

    Kulchitskii, Yu A

    2004-01-01

    With the aim of establishing of an electromagnetic energy scale of the ATLAS Tile calorimeter and understanding of performance of the calorimeter to electrons 12 \\% of modules have been exposed in electron beams with various energies by three possible ways: cell-scan at $\\theta =20^o$ at the centers of the front face cells, $\\eta$-scan and tilerow scan at $\\theta = 90^o$ for the module side cells. We have extracted the electron calibration constants and electron energy resolutions some of these barrel and extended barrel modules at energies E = 10, 20, 50, 100 and 180 GeV for the cell-scan at $\\theta = 20^o$, the $\\eta$ scan and the tile scan at $90^o$. The average values of these constants are equal to $\\langle R_e \\rangle =1.157\\pm0.002$ pC/GeV for the cell-scan at $\\theta = 20^o$, $\\langle R_e \\rangle =1.143\\pm0.005$ pC/GeV for the $\\eta$-scan and $\\langle R_e\\rangle =1.196\\pm0.005$ pC/GeV for the tile-scan at $\\theta = 90^o$. The RMS values are the following: for the cell-scan is $RMS=2.6\\pm0.1$ \\%, for t...

  3. Performance of the ATLAS Tile calorimeter

    CERN Document Server

    Bertoli, Gabriele; The ATLAS collaboration

    2015-01-01

    The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for energy reconstruction of hadrons, jets, tau­particles and missing transverse energy. TileCal is a scintillator­steel sampling calorimeter and it covers the region of pseudorapidity < 1.7. The scintillation light produced in the tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal front­end electronics read out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV. The read­out system is responsible for reconstructing the data in real­time. The digitized signals are reconstructed with the Optimal Filtering algorithm, which computes for each channel the signal amplitude, time and quality factor at the required high rate. Each stage of the signal production from scintillation light to the signal reconstruc...

  4. The ATLAS Barrel Level-1 Muon Trigger Processor Performances

    CERN Document Server

    Bocci, V; Ciapetti, G; De Pedis, D; Di Girolamo, A; Di Mattia, A; Gennari, E; Luci, C; Nisati, A; Pasqualucci, E; Pastore, F; Petrolo, E; Spila, F; Vari,, R; Veneziano, S; Zanelli, L; Aielli, G; Cardarelli, R; Di Ciaccio, A; Di Simone, A; Di Stante, L; Salamon, A; Santonico, R; Aloisio, A; Alviggi, M G; Canale, V; Carlino, G; Conventi, F; De Asmundis, R; Della Pietra, M; Delle Volpe, D; Iengo, P; Izzo, V; Migliaccio, A; Patricelli, S; Sekhniaidze, G; Brambilla, Elena; Cataldi, G; Gorini, E; Grancagnolo, F; Perrino, R; Primavera, M; Spagnolo, S; Aprodo, V; Bartos, D; Buda, S; Constantin, S; Dogaru, M; Magureanu, C; Pectu, M; Prodan, L; Rusu, A; Uroseviteanu, C

    2005-01-01

    The ATLAS level-1 muon trigger will select events with high transverse momentum and tag them to the correct machine bunch-crossing number with high efficiency. Three stations of dedicated fast detectors provide a coarse pT measurement, with tracking capability on bending and non-bending pro jections. In the Barrel region, hits from doublets of Resistive Plate Chambers are processed by custom ASIC, the Coincidence Matrices, which performs almost all the functionalities required by the trigger algorithm and the readout. In this paper we present the performance of the level-1 trigger system studied on a cosmic test stand at CERN, concerning studies on expected trigger rates and efficiencies.

  5. Design, performance, and calibration of the CMS hadron-outer calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Abdullin, S.; Gavrilov, V.; Ilyina, N.; Kaftanov, V.; Kisselevich, I.; Kolossov, V.; Krokhotin, A.; Kuleshov, S.; Pozdnyakov, A.; Safronov, G.; Semenov, S.; Stolin, V.; Ulyanov, A. [ITEP, Moscow (Russian Federation); Abramov, V.; Goncharov, P.; Kalinin, A.; Khmelnikov, A.; Korablev, A.; Korneev, Y.; Krinitsyn, A.; Kryshkin, V.; Lukanin, V.; Pikalov, V.; Ryazanov, A.; Talov, V.; Turchanovich, L.; Volkov, A. [IHEP, Protvino (Russian Federation); Acharya, B.; Aziz, T.; Banerjee, Sudeshna; Banerjee, Sunanda; Bose, S.; Chendvankar, S.; Deshpande, P.V.; Dugad, S.; Ganguli, S.N.; Guchait, M.; Gurtu, A.; Kalmani, S.; Krishnaswamy, M.R.; Maity, M.; Majumder, G.; Mazumdar, K.; Mondal, N.; Nagaraj, P.; Narasimham, V.S.; Patil, M.; Reddy, L.; Satyanarayana, B.; Sharma, S.; Sudhakar, K.; Tonwar, S.; Verma, P. [Tata Inst. of Fundamental Research, Mumbai (India); Adam, N.; Fisher, W.; Halyo, V.; Hunt, A.; Jones, J.; Laird, E.; Landsberg, G.; Marlow, D.; Tully, C.; Werner, J. [Princeton Univ., NJ (United States); Adams, M.; Bard, R.; Burchesky, K.; Qian, W. [Univ. of Illinois, Chicago, IL (United States); Akchurin, N.; Berntzon, L.; Carrell, K.; Guemues, K.; Jeong, C.; Kim, H.; Lee, S.W.; Popescu, S.; Roh, Y.; Spezziga, M.; Thomas, R.; Volobouev, I.; Wigmans, R.; Yazgan, E. [Texas Tech Univ., Lubbock, TX (United States); Akgun, U.; Albayrak, E.; Ayan, S.; Clarida, W.; Debbins, P.; Duru, F.; Ingram, D.; Merlo, J.P.; Mestvirishvili, A.; Miller, M.; Moeller, A.; Norbeck, E.; Olson, J.; Onel, Y.; Ozok, F.; Schmidt, I.; Yetkin, T. [Univ. of Iowa, Iowa City, IA (United States); Anderson, E.W.; Hauptman, J. [Iowa State Univ., Ames, IA (United States); Antchev, G.; Arcidy, M.; Hazen, E.; Heister, A.; Lawlor, C.; Lazic, D.; Machado, E.; Posch, C.; Rohlf, J.; Sulak, L.; Varela, F.; Wu, S.X. [Boston Univ., MA (United States); Aydin, S.; Bakirci, M.N.; Cerci, S.; Dumanoglu, I.; Erturk, S.; Eskut, E.; Kayis-Topaksu, A.; Onengut, G.; Ozkurt, H.; Polatoz, A.; Sogut, K. [and others

    2008-10-15

    The Outer Hadron Calorimeter (HCAL HO) of the CMS detector is designed to measure the energy that is not contained by the barrel (HCAL HB) and electromagnetic (ECAL EB) calorimeters. Due to space limitation the barrel calorimeters do not contain completely the hadronic shower and an outer calorimeter (HO) was designed, constructed and inserted in the muon system of CMS to measure the energy leakage. Testing and calibration of the HO was carried out in a 300 GeV/c test beam that improved the linearity and resolution. HO will provide a net improvement in missing E{sub T} measurements at LHC energies. Information from HO will also be used for the muon trigger in CMS. (orig.)

  6. Liquid argon calorimeter performance at high rates

    CERN Document Server

    Seifert, F; The ATLAS collaboration

    2012-01-01

    The expected increase of luminosity at HL-LHC by a factor of ten with respect to LHC luminosities has serious consequences for the signal reconstruction, radiation hardness requirements and operations of the ATLAS liquid argon calorimeters in the endcap, respectively forward region. Small modules of each type of calorimeter have been built and exposed to a high intensity proton beam of 50 GeV at IHEP/Protvino. The beam is extracted via the bent crystal technique, offering the unique opportunity to cover intensities ranging from $10^6$ p/s up to $10^{12}$ p/s. This exceeds the deposited energy per time expected at HL-LHC by more than a factor of 100. The correlation between beam intensity and the read-out signal has been studied. The data show clear indications of pulse shape distortion due to the high ionization build-up, in agreement with MC expectations. This is also confirmed from the dependence of the HV currents on beam intensity.

  7. Liquid Argon Calorimeter performance at High Rates

    CERN Document Server

    Seifert, F; The ATLAS collaboration

    2013-01-01

    The expected increase of luminosity at HL-LHC by a factor of ten with respect to LHC luminosities has serious consequences for the signal reconstruction, radiation hardness requirements and operations of the ATLAS liquid argon calorimeters in the endcap, respectively forward region. Small modules of each type of calorimeter have been built and exposed to a high intensity proton beam of 50 GeV at IHEP/Protvino. The beam is extracted via the bent crystal technique, offering the unique opportunity to cover intensities ranging from $10^6$ p/s up to $3\\cdot10^{11}$ p/s. This exceeds the deposited energy per time expected at HL-LHC by more than a factor of 100. The correlation between beam intensity and the read-out signal has been studied. The data show clear indications of pulse shape distortion due to the high ionization build-up, in agreement with MC expectations. This is also confirmed from the dependence of the HV currents on beam intensity.

  8. Performance of ATLAS L1 Calorimeter Trigger with data

    CERN Document Server

    Bracinik, J; The ATLAS collaboration

    2010-01-01

    The ATLAS first-level calorimeter trigger is a hardware-based system designed to identify high-pT jets, electron/photon and tau candidates and to measure total and missing ET in the ATLAS calorimeters. After more than two years of commissioning in situ with calibration data and cosmic rays, the system has now been extensively used to select the most interesting proton-proton collision events. Final tuning of timing and energy calibration has been carried out in 2010 to improve the trigger response to physics objects. An analysis of the performance of the level-1 calorimeter trigger will be presented, along with the techniques used to achieve these results.

  9. Performance of a Rain Barrel Sharing Network under Climate Change

    Directory of Open Access Journals (Sweden)

    Seong Jin Noh

    2015-07-01

    Full Text Available Rain barrels can be technically shared through social practices or mutual agreement between individual households. This study proposes the evaluation system for a rain barrel sharing network (RBSN considering three performance criteria of reliability, resiliency, and vulnerability, under plausible climate change scenarios. First, this study shows how the system can be improved in terms of the performance criteria using historical daily rainfall data based on the storage-reliability-yield relationship. This study then examined how the benefits from RBSN are affected by climate change after 100 years. Three climate change scenarios (A1B, A2 and B2 and three global circulation models were used for this purpose. The results showed that the reliability and vulnerability are improved due to sharing and their improvements become larger under climate change conditions. In contrast, the resiliency reduces slightly due to sharing and its reduction is attenuated under climate change conditions. In particular, vulnerability will be reduced significantly under climate change. These results suggest that the sharing of various water resources systems can be an effective climate change adaptation strategy that reduces vulnerability and increases the reliability of the system.

  10. Performance of the CMS electromagnetic calorimeter at the LHC and role in the hunt for the Higgs boson

    CERN Document Server

    Paramatti, Riccardo

    2012-01-01

    The Electromagnetic Calorimeter (ECAL) of the Compact Muon Solenoid (CMS) experiment at the LHC is a hermetic, fine grained, homogeneous calorimeter, comprising 75,848 lead tungstate (PbWO$_4$) scintillating crystals, located inside the CMS superconducting solenoidal magnet. The scintillation light is detected by avalanche photodiodes (APDs) in the barrel section and by vacuum phototriodes (VPTs) in the two endcap sections. A silicon/lead preshower detector is installed in front of the endcaps in order to improve $\\gamma$ / $\\pi^0$ discrimination. Precise calibration of the ECAL detector is required. This includes inter-calibration, to account for the differing response of channels, and calibration of the energy scale. The performance obtained during the first LHC physics runs in 2010 and 2011 is presented and the role of the ECAL in the hunt for the Higgs boson, through the two-photon decay mode, is discussed.

  11. A hadron calorimeter with scintillators parallel to the beam

    Science.gov (United States)

    Abramov, V.; Goncharov, P.; Gorin, A.; Gurzhiev, A.; Dyshkant, A.; Evdokimov, V.; Kolosov, V.; Korablev, A.; Korneev, Yu.; Kostritskii, A.; Krinitsyn, A.; Kryshkin, V.; Podstavkov, V.; Polyakov, V.; Shtannikov, A.; Tereschenko, S.; Turchanovich, L.; Zaichenko, A.

    1997-02-01

    A hadron calorimeter in which scintillators are arranged nearly parallel to the incident particle direction and light is collected by optical fibres with WLS, has been built. The iron absorber plates are of the tapered shape to fit a barrel structure of the collider geometry. The performance of the calorimeter studied with hadron beam is presented as a function of tilt angle without and with electromagnetic calorimeter in front of the hadron one.

  12. A hadron calorimeter with scintillators parallel to the beam

    Energy Technology Data Exchange (ETDEWEB)

    Abramov, V.; Goncharov, P.; Gorin, A.; Gurzhiev, A.; Dyshkant, A.; Evdokimov, V.; Kolosov, V.; Korablev, A.; Korneev, Yu.; Kostritskii, A.; Krinitsyn, A.; Kryshkin, V.; Podstavkov, V.; Polyakov, V.; Shtannikov, A.; Tereschenko, S.; Turchanovich, L.; Zaichenko, A. [Institut Fiziki Vysokikh Ehnergij, Protvino (Russian Federation)

    1997-08-11

    A hadron calorimeter in which scintillators are arranged nearly parallel to the incident particle direction and light is collected by optical fibres with WLS, has been built. The iron absorber plates are of the tapered shape to fit a barrel structure of the collider geometry. The performance of the calorimeter studied with hadron beam is presented as a function of tilt angle without and with electromagnetic calorimeter in front of the hadron one. (orig.).

  13. The NA48 liquid krypton calorimeter description and performances

    CERN Document Server

    Ocariz, J

    1999-01-01

    The NA48 experiment at CERN aims at making a precision study of direct CP violation in the neutral kaons, by measuring $Re(\\epsilon'/\\epsilon)$ with an accuracy better than 0.02%. To achieve this goal, the experiment requires a neutral detector with fast response, high efficiency in a high-rate environment space precision, and an excellent energy resolution (1%) in the $5 \\to 100$ GeV range. To achieve these performances, a quasi-homogeneous Liquid Krypton calorimeter has been chosen, designed with a projective tower geometry, high transversal segmentation, and fast digital readout. The calorimeter was operative during the '97 data taking period, its performances were thoroughly studied, and found to be in agreement with design requirements. A detector description and performances analysis are here presented.

  14. Performance of the CHORUS lead-scintillating fiber calorimeter

    CERN Document Server

    Buontempo, S

    1997-01-01

    We report on the design and performance of the lead-scintillating fiber calorimeter of the CHORUS experiment, which searches for νμ-ντ oscillations in the CERN Wide Band Neutrino beam. Two of the three sectors in which the calorimeter is divided are made of lead and plastic scintillating fibers, and they represent the first large scale application of this technique for combined electromagnetic and hadronic calorimetry. The third sector is built using the sandwich technique with lead plates and scintillator strips and acts as a tail catcher for the hadronic energy flow. From tests performed at the CERN SPS and PS an energy resolution of σ(E)/E=(32.3±2.4)%/E(GeV)+(1.4±0.7)% was measured for pions, and σ(E)/E=(13.8±0.9)%/E(GeV)+(−0.2±0.4)% for electrons.

  15. Time Reconstruction and Performance of the CMS Electromagnetic Calorimeter

    CERN Document Server

    Chatrchyan, S; 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; 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    2010-01-01

    The resolution and the linearity of time measurements made with the CMS electromagnetic calorimeter are studied with samples of data from test beam electrons, cosmic rays, and beam-produced muons. The resulting time resolution measured by lead tungstate crystals is better than 100 ps for energy deposits larger than 10 GeV. Crystal-to-crystal synchronization with a precision of 500 ps is performed using muons produced with the first LHC beams in 2008.

  16. Time Reconstruction and Performance of the CMS Electromagnetic Calorimeter

    CERN Document Server

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Timciuc, V; Veverka, J; Wilkinson, R; Yang, Y; Zhang, L; Zhu, K; Zhu, R Y; Akgun, B; Carroll, R; Ferguson, T; Jang, D W; Jun, S Y; Paulini, M; Russ, J; Terentyev, N; Vogel, H; Vorobiev, I; Cumalat, J P; Dinardo, M E; Drell, B R; Ford, W T; Heyburn, B; Luiggi Lopez, E; Nauenberg, U; Stenson, K; Ulmer, K; Wagner, S R; Zang, S L; Agostino, L; Alexander, J; Blekman, F; Cassel, D; Chatterjee, A; Das, S; Gibbons, L K; Heltsley, B; Hopkins, W; Khukhunaishvili, A; Kreis, B; Kuznetsov, V; Patterson, J R; Puigh, D; Ryd, A; Shi, X; Stroiney, S; Sun, W; Teo, W D; Thom, J; Vaughan, J; Weng, Y; Wittich, P; Beetz, C P; Cirino, G; Sanzeni, C; Winn, D; Abdullin, S; Afaq, M A; Albrow, M; Ananthan, B; Apollinari, G; Atac, M; Badgett, W; Bagby, L; Bakken, J A; Baldin, B; Banerjee, S; Banicz, K; Bauerdick, L A T; Beretvas, A; Berryhill, J; Bhat, P C; Biery, K; Binkley, M; Bloch, I; Borcherding, F; Brett, A M; Burkett, K; Butler, J N; Chetluru, V; Cheung, H W K; Chlebana, F; Churin, I; Cihangir, S; Crawford, M; 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 resolution and the linearity of time measurements made with the CMS electromagnetic calorimeter are studied with samples of data from test beam electrons, cosmic rays, and beam-produced muons. The resulting time resolution measured by lead tungstate crystals is better than 100 ps for energy deposits larger than 10 GeV. Crystal-to-crystal synchronization with a precision of 500 ps is performed using muons produced with the first LHC beams in 2008.

  17. Construction and Performance of an Iron-Scintillator Hadron Calorimeter with Longitudinal Tile Configuration

    CERN Multimedia

    2002-01-01

    % RD34 \\\\ \\\\ In a scintillator tile calorimeter with wavelength shifting fiber readout significant simplifications of the construction and the assembly are possible if the tiles are oriented $^{\\prime\\prime}$longitudinally$^{\\prime\\prime}$, i.e.~in a r-$\\phi$ planes for a barrel configuration. For a hybrid calorimeter consisting of a scintillator tile hadron compartment and a sufficiently containing liquid argon electromagnetic (EM) compartment, as proposed for the ATLAS detector, good jet resolution is predicted by simulations, which is not affected by this particular orientation of the tiles. \\\\ \\\\The aim of the proposed development program is to construct a calorimeter test module with longitudinal tiles and to check the simulation results by test beam measurements. In addition several component tests and further simulations and engineering studies are needed to optimize the design of a large calorimeter structure to be used in collider experiments. The construction of a test module will also provide valua...

  18. Performance of the CMS Electromagnetic Calorimeter in LHC

    CERN Document Server

    Theofilatos, Konstantinos

    2011-01-01

    The CMS Electromagnetic Calorimeter (ECAL) is a high resolution, fine grained calorimeter devised to measure photons and electrons at the LHC. Built of lead tungstate crystals, it plays a crucial role in the search for new physics as well as in precision measurements of the Standard Model. A pre-shower detector composed of sandwiches of lead and silicon strips improves $\\pi^0/\\gamma$ separation in the forward region. The operation and performance of the ECAL with pp collisions at $\\sqrt{s}$ = 7 TeV will be reviewed. Pure samples of electrons and photons from decays of known resonances have been exploited to improve and verify the trigger efficiency, the reconstruction algorithms, the detector calibration and stability, and the particle identification efficiency. A review of these aspects will be given.

  19. CMS Electromagnetic Calorimeter performance during the 2011 LHC run

    CERN Document Server

    Montanino, Damiana

    2012-01-01

    The CMS Electromagnetic Calorimeter (ECAL) is a high resolution, fine-grained calorimeter devised to measure photons and electrons at the LHC. Built of lead tungstate crystals, it plays a crucial role in the search for new physics as well as in precision measurements of the Standard Model. A pre-shower detector composed of sandwiches of lead and silicon strips improves pi0/gamma separation in the forward region. The operation and performance of the ECAL during the 2011 run at the LHC, with pp collisions at sqrt(s) = 7 TeV will be reviewed. Pure samples of electrons and photons from decays of known resonances have been exploited to improve and verify the trigger efficiency, the reconstruction algorithms, the detector calibration and stability, and the particle identification efficiency. A review of all these aspects will be given.

  20. Performance of the CMS Electromagnetic Calorimeter at the LHC

    CERN Document Server

    Della Ricca, Giuseppe

    2011-01-01

    The CMS Electromagnetic Calorimeter (ECAL) is a high resolution, fine-grained calorimeter devised to measure photons and electrons at the LHC. Built of lead tungstate crystals, it plays a crucial role in the search for new physics as well as in precision measurements of the Standard Model. A pre-shower detector composed of sandwiches of lead and silicon strips improves $\\pi^0/\\gamma$ separation in the forward region. The operation and performance of the ECAL during the 2010 run at the LHC, with pp collisions at $\\sqrt{s}$ = 7 TeV will be reviewed, and to some extent for the 2011 running as well. Pure samples of electrons and photons from decays of known resonances have been exploited to improve and verify the trigger efficiency, the reconstruction algorithms, the detector calibration and stability, and the particle identification efficiency. A review of these aspects will be given.

  1. Photon reconstruction in the ATLAS Inner Detector and Liquid Argon Barrel Calorimeter at the 2004 Combined Test Beam

    CERN Document Server

    Abat, E; Addy, T N; Adragna, P; Aharrouche, M; Ahmad, A; Akesson, T.P A; Aleksa, M; Alexa, C; Anderson, K; Andreazza, A; Anghinolfi, F; Antonaki, A; Arabidze, G; Arik, E; Atkinson, T; Baines, J; Baker, O K; Banfi, D; Baron, S; Barr, A J; Beccherle, R; Beck, H P; Belhorma, B; Bell, P J; Benchekroun, D; Benjamin, D P; Benslama, K; Bergeaas Kuutmann, E; Bernabeu, J; Bertelsen, H; Binet, S; Biscarat, C; Boldea, V; Bondarenko, V G; Boonekamp, M; Bosman, M; Bourdarios, C; Broklova, Z; Burckhart-Chromek, D; Bychkov, V; Callahan, J; Calvet, D; Canneri, M; Capeans Garrido, M; Caprini, M; Cardiel Sas, L; Carli, T; Carminati, L; Carvalho, J; Cascella, M; Castillo, M V; Catinaccio, A; Cauz, D; Cavalli, D; Cavalli-Sforza, M; Cavasinni, V; Cetin, S A; Chen, H; Cherkaoui, R; Chevalier, L; Chevallier, F; Chouridou, S; Ciobotaru, M; Citterio, M; Clark, A; Cleland, B; Cobal, M; Cogneras, E; Conde Muino, P; Consonni, M; Constantinescu, S; Cornelissen, T; Correard, S; Corso-Radu, A; Costa, G; Costa, M J; Costanzo, D; Cuneo, S; Cwetanski, P; Da Silva, D; Dam, M; Dameri, M; Danielsson, H O; Dannheim, D; Darbo, G; Davidek, T; De, K; Defay, P O; Dekhissi, B; Del Peso, J; Del Prete, T; Delmastro, M; Derue, F; Di Ciaccio, L; Di Girolamo, B; Dita, S; Dittus, F; Djama, F; Djobava, T; Dobos, D; Dobson, M; Dolgoshein, B A; Dotti, A; Drake, G; Drasal, Z; Dressnandt, N; Driouchi, C; Drohan, J; Ebenstein, W L; Eerola, P; Efthymiopoulos, I; Egorov, K; Eifert, T F; Einsweiler, K; El Kacimi, M; Elsing, M; Emelyanov, D; Escobar, C; Etienvre, A I; Fabich, A; Facius, K; Idrissi Fakhr-Eddine, A; Fanti, M; Farbin, A; Farthouat, P; Fassouliotis, D; Fayard, L; Febbraro, R; Fedin, O L; Fenyuk, A; Fergusson, D; Ferrari, P; Ferrari, R; Ferreira, B C; Ferrer, A; Ferrere, D; Filippini, G; Flick, T; Fournier, D; Francavilla, P; Francis, D; Froeschl, R; Froidevaux, D; Fullana, E; Gadomski, S; Gagliardi, G; Gagnon, P; Gallas, M; Gallop, B J; Gameiro, S; Gan, K K; Garcia, R; Garcia, C; Gavrilenko, I L; Gemme, C; Gerlach, P; Ghodbane, N; Giakoumopoulou, V; Giangiobbe, V; Giokaris, N; Glonti, G; Gottfert, T.; Golling, T; Gollub, N; Gomes, A; Gomez, M D; Gonzalez-Sevilla, S; Goodrick, M J; Gorfine, G; Gorini, B; Goujdami, D; Grahn, K J; Grenier, P; Grigalashvili, N; Grishkevich, Y; Grosse-Knetter, J; Gruwe, M; Guicheney, C; Gupta, A; Haeberli, C; Hartel, R.; Hajduk, Z; Hakobyan, H; Hance, M; Hansen, J D; Hansen, P H; Hara, K; Harvey, A., Jr; Hawkings, R J; Heinemann, F.E W; Henriques Correia, A; Henss, T; Hervas, L; Higon, E; Hill, J C; Hoffman, J; Hostachy, J Y; Hruska, I; Hubaut, F; Huegging, F; Hulsbergen, W; Hurwitz, M; Iconomidou-Fayard, L; Jansen, E; Jen-La Plante, I; Johansson, P.D C; Jon-And, K; Joos, M; Jorgensen, S; Joseph, J; Kaczmarska, A; Kado, M; Karyukhin, A; Kataoka, M; Kayumov, F; Kazarov, A; Keener, P T; Kekelidze, G D; Kerschen, N; Kersten, S; Khomich, A; Khoriauli, G; Khramov, E; Khristachev, A; Khubua, J; Kittelmann, T H; Klingenberg, R; Klinkby, E B; Kodys, P; Koffas, T; Kolos, S; Konovalov, S P; Konstantinidis, N; Kopikov, S; Korolkov, I; Kostyukhin, V; Kovalenko, S; Kowalski, T Z; Kruger, K.; Kramarenko, V; Kudin, L G; Kulchitsky, Y; Lacasta, C; Lafaye, R; Laforge, B; Lampl, W; Lanni, F; Laplace, S; Lari, T; Le Bihan, A C; Lechowski, M; Ledroit-Guillon, F; Lehmann, G; Leitner, R; Lelas, D; Lester, C G; Liang, Z; Lichard, P; Liebig, W; Lipniacka, A; Lokajicek, M; Louchard, L; Loureiro, K F; Lucotte, A; Luehring, F; Lund-Jensen, B; Lundberg, B; Ma, H; Mackeprang, R; Maio, A; Maleev, V P; Malek, F; Mandelli, L; Maneira, J; Mangin-Brinet, M; Manousakis, A; Mapelli, L; Marques, C; Marti i Garcia, S; Martin, F; Mathes, M; Mazzanti, M; McFarlane, K W; McPherson, R; Mchedlidze, G; Mehlhase, S; Meirosu, C; Meng, Z; Meroni, C; Mialkovski, V; Mikulec, B; Milstead, D; Minashvili, I; Mindur, B; Mitsou, V A; Moed, S; Monnier, E; Moorhead, G; Morettini, P; Morozov, S V; Mosidze, M; Mouraviev, S V; Moyse, E.W J; Munar, A; Myagkov, A; Nadtochi, A V; Nakamura, K; Nechaeva, P; Negri, A; Nemecek, S; Nessi, M; Nesterov, S Y; Newcomer, F M; Nikitine, I; Nikolaev, K; Nikolic-Audit, I; Ogren, H; Oh, S H; Oleshko, S B; Olszowska, J; Onofre, A; Padilla Aranda, C; Paganis, S; Pallin, D; Pantea, D; Paolone, V; Parodi, F; Parsons, J; Parzhitski, S; Pasqualucci, E; Passmore, S M; Pater, J; Patrichev, S; Peez, M; Perez Reale, V; Perini, L; Peshekhonov, V D; Petersen, J; Petersen, T C; Petti, R; Phillips, P W; Pilcher, J; Pina, J; Pinto, B; Podlyski, F; Poggioli, L; Poppleton, A; Poveda, J; Pralavorio, P; Pribyl, L; Price, M J; Prieur, D; Puigdengoles, C; Puzo, P; Ragusa, F; Rajagopalan, S; Reeves, K; Reisinger, I; Rembser, C; Bruckman de Renstrom, P.A.; Reznicek, P; Ridel, M; Risso, P; Riu, I; Robinson, D; Roda, C; Roe, S; Rohne, O.; Romaniouk, A; Rousseau, D; Rozanov, A; Ruiz, A; Rusakovich, N; Rust, D; Ryabov, Y F; Ryjov, V; Salto, O; Salvachua, B; Salzburger, A; Sandaker, H; Santamarina Rios, C.Santamarina; Santi, L; Santoni, C; Saraiva, J G; Sarri, F; Sauvage, G; Says, L P; Schaefer, M; Schegelsky, V A; Schiavi, C; Schieck, J; Schlager, G; Schlereth, J; Schmitt, C; Schultes, J; Schwemling, P; Schwindling, J; Seixas, J M; Seliverstov, D M; Serin, L; Sfyrla, A; Shalanda, N; Shaw, C; Shin, T; Shmeleva, A; Silva, J; Simion, S; Simonyan, M; Sloper, J E; Smirnov, S.Yu; Smirnova, L; Solans, C; Solodkov, A; Solovianov, O; Soloviev, I; Sosnovtsev, V V; Spano, F; Speckmayer, P; Stancu, S; Stanek, R; Starchenko, E; Straessner, A; Suchkov, S I; Suk, M; Szczygiel, R; Tarrade, F; Tartarelli, F; Tas, P; Tayalati, Y; Tegenfeldt, F; Teuscher, R; Thioye, M; Tikhomirov, V O; Timmermans, C.J.W P; Tisserant, S; Toczek, B; Tremblet, L; Troncon, C; Tsiareshka, P; Tyndel, M; Karagoz Unel, M.; Unal, G; Unel, G; Usai, G; Van Berg, R; Valero, A; Valkar, S; Valls, J A; Vandelli, W; Vannucci, F; Vartapetian, A; Vassilakopoulos, V I; Vasilyeva, L; Vazeille, F; Vernocchi, F; Vetter-Cole, Y; Vichou, I; Vinogradov, V; Virzi, J; Vivarelli, I; de Vivie, J B; Volpi, M; Vu Anh, T; Wang, C; Warren, M; Weber, J; Weber, M; Weidberg, A R; Weingarten, J; Wells, P S; Werner, P; Wheeler, S; Wiesmann, M; Wilkens, H; Williams, H H; Wingerter-Seez, I; Yasu, Y; Zaitsev, A; Zenin, A; Zenis, T; Zenonos, Z; Zhang, H; Zhelezko, A; Zhou, N

    2011-01-01

    The reconstruction of photons in the ATLAS detector is studied with data taken during the 2004 Combined Test Beam, where a full slice of the ATLAS detector was exposed to beams of particles of known energy at the CERN SPS. The results presented show significant differences in the longitudinal development of the electromagnetic shower between converted and unconverted photons as well as in the total measured energy. The potential to use the reconstructed converted photons as a means to precisely map the material of the tracker in front of the electromagnetic calorimeter is also considered. All results obtained are compared with a detailed Monte-Carlo simulation of the test-beam setup which is based on the same simulation and reconstruction tools as those used for the ATLAS detector itself.

  2. Response of a close to final prototype for the barrel of the PANDA electromagnetic calorimeter to photons at energies below 1 GeV

    Energy Technology Data Exchange (ETDEWEB)

    Rosenbaum, Christoph; Diehl, Stefan; Dormenev, Valery; Drexler, Peter; Kuske, Till; Nazarenko, Svetlana; Novotny, Rainer W.; Zaunick, Hans-Georg [II. Physikalisches Institut, Giessen Univ. (Germany); Kavatsyuk, Myroslav [KVI Groningen (Netherlands); Rosier, Philippe [IPN Orsay (France); Ryantzev, Andrej [IHEP Protvino (Russian Federation); Wieczorek, Peter; Wilms, Andrea [GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt (Germany)

    2015-07-01

    The EMC of the PANDA detector is one of the central components to achieve the proposed physical goals. The barrel part of the EMC will consist of more than 11,000 lead tungstate (PWO-II) crystals operated at -25 C to achieve the required performance over the complete energy range. The most recent prototype PROTO120 represents a larger section of a barrel slice, containing the most tapered crystals. The readout is performed with two rectangular large area APDs per crystal, which are read out separately via the specially developed APFEL-ASIC, providing a large dynamic range, low power consumption and optimized shaping. The present contribution will show the response of the PROTO120 to photons in the energy range below 800 MeV. It focuses on the performance of the ASIC under real conditions and describe the analysis procedure including the signal extraction and obtained energy resolution using the information from both APDs.

  3. Corrections of the energies of electrons in the barrel/endcap transition region of the ATLAS electromagnetic calorimeter using Multivariate techniques

    CERN Document Server

    Moni, Chrysanthi

    2014-01-01

    The main purpose of this study is the correction for the energy losses of the e± in the tran- sition region between the barrel and the end-caps of the Electromagnetic Calorimeter (EMCal) of ATLAS, by using Multivariate techniques. The crack region is the one with the largest amount of material upstream the EMCal and this is the reason for which e± lose a great part of their energy as they pass through it. In this project, the contribution of the Multivariate Analysis in the correction of the E/Etrue distribution as well as in the derivation of the Gaussian peak versus |η| and ET , is examined. η is the pseudorapidity used as a spatial coordinate for the description of the angle of a particle relative to the beam axis and ET= Etrue /cosh(|η|), where Etrue is the true energy of the particles. Finally, the improvement of the resolution by using MVA techniques with and without scintillator is also explored.

  4. Design, Performance, and Calibration of CMS Hadron Endcap Calorimeters

    CERN Document Server

    Baiatian, G; Emeliantchik, Igor; Massolov, V; Shumeiko, Nikolai; Stefanovich, R; Damgov, Jordan; Dimitrov, Lubomir; Genchev, Vladimir; Piperov, Stefan; Vankov, Ivan; Litov, Leander; Bencze, Gyorgy; Laszlo, Andras; Pal, Andras; Vesztergombi, Gyorgy; Zálán, Peter; Fenyvesi, Andras; Bawa, Harinder Singh; Beri, Suman Bala; Bhatnagar, Vipin; Kaur, Manjit; Kohli, Jatinder Mohan; Kumar, Arun; Singh, Jas Bir; Acharya, Bannaje Sripathi; Banerjee, Sunanda; Banerjee, Sudeshna; Chendvankar, Sanjay; Dugad, Shashikant; Kalmani, Suresh Devendrappa; Katta, S; Mazumdar, Kajari; Mondal, Naba Kumar; Nagaraj, P; Patil, Mandakini Ravindra; Reddy, L; Satyanarayana, B; Sharma, Seema; Sudhakar, Katta; Verma, Piyush; Hashemi, Majid; Mohammadi-Najafabadi, M; Paktinat, S; Babich, Kanstantsin; Golutvin, Igor; Kalagin, Vladimir; Kamenev, Alexey; Konoplianikov, V; Kosarev, Ivan; Moissenz, K; Moissenz, P; Oleynik, Danila; Petrosian, A; Rogalev, Evgueni; Semenov, Roman; Sergeyev, S; Shmatov, Sergey; Smirnov, Vitaly; Vishnevskiy, Alexander; Volodko, Anton; Zarubin, Anatoli; Druzhkin, Dmitry; Ivanov, Alexander; Kudinov, Vladimir; Orlov, Alexandre; Smetannikov, Vladimir; Gavrilov, Vladimir; Gershtein, Yuri; Ilyina, N; Kaftanov, Vitali; Kisselevich, I; Kolossov, V; Krokhotin, Andrey; Kuleshov, Sergey; Litvintsev, Dmitri; Ulyanov, A; Safronov, Grigory; Semenov, Sergey; Stolin, Viatcheslav; Demianov, A; Gribushin, Andrey; Kodolova, Olga; Petrushanko, Sergey; Sarycheva, Ludmila; Teplov, V; Vardanyan, Irina; Yershov, A; Abramov, Victor; Goncharov, Petr; Kalinin, Alexey; Khmelnikov, Alexander; Korablev, Andrey; Korneev, Yury; Krinitsyn, Alexander; Kryshkin, V; Lukanin, Vladimir; Pikalov, Vladimir; Ryazanov, Anton; Talov, Vladimir; Turchanovich, L; Volkov, Alexey; Camporesi, Tiziano; de Visser, Theo; Vlassov, E; Aydin, Sezgin; Bakirci, Mustafa Numan; Cerci, Salim; Dumanoglu, Isa; Eskut, Eda; Kayis-Topaksu, A; Koylu, S; Kurt, Pelin; Onengüt, G; Ozkurt, Halil; Polatoz, A; Sogut, Kenan; Topakli, Huseyin; Vergili, Mehmet; Yetkin, Taylan; Cankoc, K; Esendemir, Akif; Gamsizkan, Halil; Güler, M; Ozkan, Cigdem; Sekmen, Sezen; Serin-Zeyrek, M; Sever, Ramazan; Yazgan, Efe; Zeyrek, Mehmet; Deliomeroglu, Mehmet; Gülmez, Erhan; Isiksal, Engin; Kaya, Mithat; Ozkorucuklu, Suat; Levchuk, Leonid; Sorokin, Pavel; Grynev, B; Lyubynskiy, Vadym; Senchyshyn, Vitaliy; Hauptman, John M; Abdullin, Salavat; Elias, John E; Elvira, D; Freeman, Jim; Green, Dan; Los, Serguei; ODell, V; Ronzhin, Anatoly; Suzuki, Ichiro; Vidal, Richard; Whitmore, Juliana; Arcidy, M; Hazen, Eric; Heering, Arjan Hendrix; Lawlor, C; Lazic, Dragoslav; Machado, Emanuel; Rohlf, James; Varela, F; Wu, Shouxiang; Baden, Drew; Bard, Robert; Eno, Sarah Catherine; Grassi, Tullio; Jarvis, Chad; Kellogg, Richard G; Kunori, Shuichi; Mans, Jeremy; Skuja, Andris; Podrasky, V; Sanzeni, Christopher; Winn, Dave; Akgun, Ugur; Ayan, S; Duru, Firdevs; Merlo, Jean-Pierre; Mestvirishvili, Alexi; Miller, Michael; Norbeck, Edwin; Olson, Jonathan; Onel, Yasar; Schmidt, Ianos; Akchurin, Nural; Carrell, Kenneth Wayne; Gusum, K; Kim, Heejong; Spezziga, Mario; Thomas, Ray; Wigmans, Richard; Baarmand, Marc M; Mermerkaya, Hamit; Ralich, Robert; Vodopiyanov, Igor; Kramer, Laird; Linn, Stephan; Markowitz, Pete; Cushman, Priscilla; Ma, Yousi; Sherwood, Brian; Cremaldi, Lucien Marcus; Reidy, Jim; Sanders, David A; Karmgard, Daniel John; Ruchti, Randy; Fisher, Wade Cameron; Tully, Christopher; Bodek, Arie; De Barbaro, Pawel; Budd, Howard; Chung, Yeon Sei; Haelen, T; Hagopian, Sharon; Hagopian, Vasken; Johnson, Kurtis F; Barnes, Virgil E; Laasanen, Alvin T

    2008-01-01

    Detailed measurements have been made with the CMS hadron calorimeter endcaps (HE) in response to beams of muons, electrons, and pions. Readout of HE with custom electronics and hybrid photodiodes (HPDs) shows no change of performance compared to readout with commercial electronics and photomultipliers. When combined with lead-tungstenate crystals, an energy resolution of 8\\% is achieved with 300 GeV/c pions. A laser calibration system is used to set the timing and monitor operation of the complete electronics chain. Data taken with radioactive sources in comparison with test beam pions provides an absolute initial calibration of HE to approximately 4\\% to 5\\%.

  5. ATLAS Tile Calorimeter performance for the phase II upgrade

    CERN Document Server

    Sellapillay, Kevissen

    2017-01-01

    The first part of the internship is focused on trying to assess the performance of the upgraded geometry of the ATLAS Tile Calorimeter. To do this, we use Monte Carlo generated samples for the upgraded geometry and from the current geometry, then we derive the pT response and resolution. The second part of the study is an analysis of the sensitivity of the two different geometries to a new heavy boson that would decay into a top quark pair $Z^{\\prime} \\rightarrow t\\bar{t}$.

  6. sPHENIX Calorimeter Design and Jet Performance

    Science.gov (United States)

    Haggerty, John S.

    2016-12-01

    The PHENIX collaboration is planning a detector upgrade, sPHENIX, which consists of large acceptance calorimetry and tracking detectors built around the superconducting solenoid recently shipped to Brookhaven from the decommissioned BaBar experiment at SLAC. The sPHENIX calorimeter system includes three radial layers of sampling calorimeters, a tungsten-scintillating fiber electromagnetic calorimeter, and two longitudinally segmented sampling hadron calorimeters that are made of scintillator tiles and steel plates. Together, they provide hermetic coverage in | η | < 1 for calorimetry based jet measurements as well as minimal bias jet trigger capability, which coupled with high resolution tracking, enable an extremely rich jet physics program at RHIC.

  7. Performance of prototypes for the ALICE electromagnetic calorimeter

    CERN Document Server

    Allen, J; Badala, A; Baumgart, S; Bellwied, R; Benhabib, L; Bernard, C; Bianchi, N; Blanco, F; Bortoli, Y; Bourdaud, G; Bourrion, O; Boyer, B; Bruna, E; Butterworth, J; Caines, H; Calvo Diaz Aldagalan, D; Capitani, G P; Carcagno, Y; Casanova Diaz, A; Cherney, M; Conesa Balbastre, G; Cormier, T M; Cunqueiro Mendez, L; Delagrange, H; Del Franco, M; Dialinas, M; Di Nezza, P; Donoghue, A; Elnimr, M; Enokizono, A; Estienne, M; Faivre, J; Fantoni, A; Fichera, F; Foglio, B; Fresneau, S; Fujita, J; Furget, C; Gadrat, S; Garishvili, I; Germain, M; Giudice, N; Gorbunov, Y; Grimaldi, A; Guardone, N; Guernane, R; Hadjidakis, C; Hamblen, J; Harris, J W; Hasch, D; Heinz, M; Hille, P T; Hornback, D; Ichou, R; Jacobs, P; Jangal, S; Jayananda, K; Klay, J L; Knospe, A G; Kox, S; Kral, J; Laloux, P; LaPointe, S; La Rocca, P; Lewis, S; Li, Q; Librizzi, F; Madagodahettige Don, D; Martashvili, I; Mayes, B; Milletto, T; Muccifora, V; Muller, H; Muraz, J F; Nattrass, C; Noto, F; Novitzky, N; Odyniec, G; Orlandi, A; Palmeri, A; Pappalardo, G S; Pavlinov, A; Pesci, W; Petrov, V; Petta, C; Pichot, P; Pinsky, L; Ploskon, M; Pompei, F; Pulvirenti, A; Putschke, J; Pruneau, C A; Rak, J; Rasson, J; Read, K F; Real, J S; Reolon, A R; Riggi, F; Riso, J; Ronchetti, F; Roy, C; Roy, D; Salemi, M; Salur, S; Sharma, M; Silvermyr, D; Smirnov, N; Soltz, R; Sparti, V; Stutzmann, J.-S; Symons, T J.M; Tarazona Martinez, A; Tarini, L; Thomen, R; Timmins, A; van Leeuwen, M; Vieira, R; Viticchie, A; Voloshin, S; Wang, D; Wang, Y; Ward, R M

    2010-01-01

    The performance of prototypes for the ALICE electromagnetic sampling calorimeter has been studied in test beam measurements at FNAL and CERN. A $4\\times4$ array of final design modules showed an energy resolution of about 11% /$\\sqrt{E(\\mathrm{GeV})}$ $\\oplus$ 1.7 % with a uniformity of the response to electrons of 1% and a good linearity in the energy range from 10 to 100 GeV. The electromagnetic shower position resolution was found to be described by 1.5 mm $\\oplus$ 5.3 mm /$\\sqrt{E \\mathrm{(GeV)}}$. For an electron identification efficiency of 90% a hadron rejection factor of $>600$ was obtained.

  8. Performance of a liquid argon accordion hadronic calorimeter prototype

    Energy Technology Data Exchange (ETDEWEB)

    Gingrich, D.M. [Alberta Univ., Edmonton, AB (Canada); Greeniaus, G. [Alberta Univ., Edmonton, AB (Canada); Kitching, P. [Alberta Univ., Edmonton, AB (Canada); Olsen, B. [Alberta Univ., Edmonton, AB (Canada); Pinfold, J.L. [Alberta Univ., Edmonton, AB (Canada); Rodning, N.L. [Alberta Univ., Edmonton, AB (Canada); Boos, E. [Alma-Ata (Kazakhstan); Schaoutnikov, B.O. [Alma-Ata (Kazakhstan); Aubert, B. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Bazan, A. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Beaugiraud, B. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Boniface, J. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Colas, J. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Jezequel, S. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Leflour, T. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Maire, M. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Rival, F. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Stipcevic, M. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Thion, J. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; VanDenPlas, D. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Wingerter-Seez, I. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Zolnierowski, Y.P. [Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules; Chmeissani, M. [Universidad Autonoma de Barcelona (Spain); Fernandez, E. [Universidad Autonoma de Barcelona (Spain); Garrido, L. [Universidad Autonoma de Barcelona (Spain); Martinez, M. [Universidad Autonoma de Barcelona (Spain); Padilla, C. [Universidad Autonoma de Barcelona (Spain); Gordon, H.A. [Brookhaven National Lab., Upton, NY (United States); RD3 Colla...

    1995-02-15

    A liquid argon hadronic calorimeter using the ``accordion`` geometry and the electrostatic transformer readout scheme has been tested at CERN, together with a liquid argon accordion electromagnetic prototype. The results obtained for pions on the linearity, the energy resolution and the uniformity of the calorimeter response are well within the requirements for operation at the LHC. ((orig.))

  9. METROLOGICAL PERFORMANCES OF BOMB CALORIMETERS AT REAL CONDITIONS

    Directory of Open Access Journals (Sweden)

    Yu. V. Maksimuk

    2016-01-01

    Full Text Available The high-usage measurement equipment for heat of combustion of organic fuels are bomb isoperibol calorimeters with a water thermostat. The stability of work of calorimeters at real conditions is important for maintenance of reliability of measurement results. The article purpose – the analysis of stability for parameters of calorimeters to environment changes. In this work influence room temperature (Тк and heat exchange conditions on metrological characteristics of two models of calorimeters is considered with different degree of thermal protection: V-08МА and BIC 100. For calorimeters V-08МА the increase in a effective heat capacity (W on 0,1 % by growth of Tк on everyone 5 °С is established. To use value W in all interval laboratory temperatures Tк = 14–28 °С it is necessary to correct W on 2,8 J/°C on everyone 1 °С changes of Tк. Updating W is required, if the correction exceeds error in determination W. For calorimeter BIC 100 it is not revealed dependences W from Tк. BIC 100 have constant-temperature cap, high stability a temperature in thermostat and stabilized heat exchange. It is established that an standard deviation of cooling constant for all calorimeters in direct proportional to standard deviation W. 

  10. sPHENIX Calorimeter Design and Jet Performance

    Energy Technology Data Exchange (ETDEWEB)

    Haggerty J. S.

    2016-09-27

    The PHENIX collaboration is planning a detector upgrade, sPHENIX, which consists of large acceptance calorimetry and tracking detectors built around the superconducting solenoid recently shipped to Brookhaven from the decommissioned BaBar experiment at SLAC. The sPHENIX calorimeter system includes three radial layers of samplingcalorimeters, a tungsten-scintillating fiber electromagnetic calorimeter, and two longitudinally segmented samplinghadron calorimeters that are made of scintillator tiles and steel plates. Together, they provide hermetic coverage in n < 1 for calorimetry based jet measurements as well as minimal bias jet trigger capability, which coupled with high resolution tracking, enable an extremely rich jet physics program at RHIC.

  11. Electron identification in and performance of the ND280 Calorimeter

    CERN Document Server

    Carver, Antony

    T2K is an o axis neutrino beam experiment with a baseline of 295 km to the far detector, Super-Kamiokande. The near detector, ND280, measures the ux and energy spectra of electron and muon neutrinos in the direction of Super-Kamiokande. An electromagnetic calorimeter constructed from lead and scintillator surrounds the inner detector. Three time projection chambers and two ne grained scintillator detectors sit inside the calorimeter. This thesis describes the development of a particle identification algorithm for the calorimeter and studies how it can enhance a simple electron neutrino analysis. A particle identification algorithm was written for the electromagnetic calorimeter to separate minimally ionising particles, electromagnetic and hadronic showers. A Monte Carlo study suggested that the algorithm produced an electron sample with a relative muon contamination of 10+-2 whilst maintaining an electron efficiency of 80%. Data collected at CERN was then used to make comparisons between the Monte Carlo simul...

  12. Design, Performance and Calibration of the CMS Forward Calorimeter Wedges

    CERN Document Server

    Baiatian, G; Emeliantchik, Igor; Massolov, V; Shumeiko, Nikolai; Stefanovich, R; Damgov, Jordan; Dimitrov, Lubomir; Genchev, Vladimir; Piperov, Stefan; Vankov, Ivan; Litov, Leander; Bencze, Gyorgy; Laszlo, Andras; Pal, Andras; Vesztergombi, Gyorgy; Zálán, Peter; Fenyvesi, Andras; Bawa, Harinder Singh; Beri, Suman Bala; Bhatnager, V; Kaur, Manjit; Kumar, Arun; Kohli, Jatinder Mohan; Singh, Jas Bir; Acharya, Bannaje Sripathi; Chendvankar, Sanjay; Dugad, Shashikant; Kalmani, Suresh Devendrappa; Katta, S; Mazumdar, Kajari; Mondal, Naba Kumar; Nagaraj, P; Patil, Mandakini Ravindra; Reddy, L V; Satyanarayana, B; Sharma, Seema; Verma, Piyush; Hashemi, Majid; Mohammadi-Najafabadi, M; Paktinat, S; Babich, Kanstantsin; Golutvin, Igor; Kalagin, Vladimir; Kosarev, Ivan; Ladygin, Vladimir; Meshcheryakov, Gleb; Moissenz, P; Petrosian, A; Rogalev, Evgueni; Sergeyev, S; Smirnov, Vitaly; Vishnevski, A V; Volodko, Anton; Zarubin, Anatoli; Gavrilov, Vladimir; Gershtein, Yuri; Ilyina, N P; Kaftanov, Vitali; Kisselevich, I; Kolossov, V; Krokhotin, Andrey; Kuleshov, Sergey; Litvintsev, Dmitri; Oulyanov, A; Safronov, S; Semenov, Sergey; Stolin, Viatcheslav; Gribushin, Andrey; Demianov, A; Kodolova, Olga; Petrushanko, Sergey; Sarycheva, Ludmila; Teplov, Konstantin; Vardanyan, Irina; Yershov, A A; Abramov, Victor; Goncharov, Petr; Kalinin, Alexey; Korablev, Andrey; Khmelnikov, V A; Korneev, Yury; Krinitsyn, Alexander; Kryshkin, V; Lukanin, Vladimir; Pikalov, Vladimir; Ryazanov, Anton; Talov, Vladimir; Turchanovich, L K; Volkov, Alexey; Camporesi, Tiziano; De Visser, Theo; Vlassov, E; Aydin, Sezgin; Bakirci, Mustafa Numan; Cerci, Salim; Dumanoglu, Isa; Eskut, Eda; Kayis-Topaksu, A; Koylu, S; Kurt, Pelin; Kuzucu, A; Onengüt, G; Ozdes-Koca, N; Ozkurt, Halil; Sogut, Kenan; Topakli, Huseyin; Vergili, Mehmet; Yetkin, Taylan; Cankocak, Kerem; Gamsizkan, Halil; Ozkan, Cigdem; Sekmen, Sezen; Serin-Zeyrek, M; Sever, Ramazan; Yazgan, Efe; Zeyrek, Mehmet; Deliomeroglu, Mehmet; Dindar, Kamile; Gülmez, Erhan; Isiksal, Engin; Kaya, Mithat; Ozkorucuklu, Suat; Levchuk, Leonid; Sorokin, Pavel; Grinev, B; Lubinsky, V; Senchyshyn, Vitaliy; Anderson, E Walter; Hauptman, John M; Elias, John E; Freeman, Jim; Green, Dan; Heering, Arjan Hendrix; Lazic, Dragoslav; Los, Serguei; Ronzhin, Anatoly; Suzuki, Ichiro; Vidal, Richard; Whitmore, Juliana; Antchev, Georgy; Arcidy, M; Hazen, Eric; Lawlor, C; Machado, Emanuel; Posch, C; Rohlf, James; Sulak, Lawrence; Varela, F; Wu, Shouxiang; Adams, Mark Raymond; Burchesky, Kyle; Qiang, W; Abdullin, Salavat; Baden, Drew; Bard, Robert; Eno, Sarah Catherine; Grassi, Tullio; Jarvis, Chad; Kellogg, Richard G; Kunori, Shuichi; Mans, Jeremy; Skuja, Andris; Wang, Lei; Wetstein, Matthew; Ayan, S; Akgun, Ugur; Duru, Firdevs; Merlo, Jean-Pierre; Mestvirishvili, Alexi; Miller, Michael; Norbeck, Edwin; Olson, Jonathan; Onel, Yasar; Schmidt, Ianos; Akchurin, Nural; Carrell, Kenneth Wayne; Gumus, Kazim; Kim, Heejong; Spezziga, Mario; Thomas, Ray; Wigmans, Richard; Baarmand, Marc M; Mermerkaya, Hamit; Vodopyanov, I; Kramer, Laird; Linn, Stephan; Markowitz, Pete; Martínez, German; Cushman, Priscilla; Ma, Yousi; Sherwood, Brian; Cremaldi, Lucien Marcus; Reidy, Jim; Sanders, David A; Fisher, Wade Cameron; Tully, Christopher; Hagopian, Sharon; Hagopian, Vasken; Johnson, Kurtis F; Barnes, Virgil E; Laasanen, Alvin T; Pompos, Arnold

    2008-01-01

    We report on the test beam results and calibration methods using charged particles of the CMS Forward Calorimeter (HF). The HF calorimeter covers a large pseudorapidity region (3\\l |\\eta| \\le 5), and is essential for large number of physics channels with missing transverse energy. It is also expected to play a prominent role in the measurement of forward tagging jets in weak boson fusion channels. The HF calorimeter is based on steel absorber with embedded fused-silica-core optical fibers where Cherenkov radiation forms the basis of signal generation. Thus, the detector is essentially sensitive only to the electromagnetic shower core and is highly non-compensating (e/h \\approx 5). This feature is also manifest in narrow and relatively short showers compared to similar calorimeters based on ionization. The choice of fused-silica optical fibers as active material is dictated by its exceptional radiation hardness. The electromagnetic energy resolution is dominated by photoelectron statistics and can be expressed...

  13. The BaBar Electromagnetic Calorimeter: Status and Performance Improvements

    Energy Technology Data Exchange (ETDEWEB)

    Bauer, Johannes M.; /SLAC

    2006-01-20

    The electromagnetic calorimeter at the BABAR detector, part of the asymmetric B Factory at SLAC, measures photons in the energy range from 20 MeV to 8 GeV with high resolution. The current status of the calorimeter, now in its seventh year of operation, is being presented, as well as details on improvements made to the analysis code during the last years.

  14. Current Status and Performance of the BESIII Electromagnetic Calorimeter

    Science.gov (United States)

    Feldbauer, Florian; BESIII Collaboration

    2015-02-01

    The BESIII experiment is located at the Beijing Electron Positron Collider (BEPCII) in China. Its electromagnetic calorimeter (EMC) consists of 6240 CsI(TI) crystals, each read out by two Photodiodes (PD) at the end of the crystal. Changes in the response of the calorimeter due to radiation damage in the crystals or changes in the photo detector output are monitored with a light pulser system.

  15. Calibration and Performance of the ATLAS Tile Calorimeter During the LHC Run 2

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00221190; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) covers the central part of the ATLAS experiment and provides important information for the reconstruction of hadrons, jets, hadronic decays of tau leptons and missing transverse energy. This sampling hadronic calorimeter uses steel plates as absorber and scintillating tiles as active medium. The light produced by charged particles in tiles is transmitted by wavelength-shifting fibres to photomultipliers, where it is converted to electric pulses and further processed by the on-detector electronics located in the outermost part of the calorimeter. The TileCal calibration system comprises Cesium radioactive sources, laser, charge injection elements and an integrator based readout system. Combined information from all systems allows to monitor and equalize the calorimeter response at each stage of the signal production, from scintillation light to digitisation. The performance of the calorimeter has been established with cosmic ray muons and the large sample of the proton-proton col...

  16. Calibration and Performance of the ATLAS Tile Calorimeter During the LHC Run 2

    CERN Document Server

    Cerda Alberich, Leonor; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) is the hadronic sampling calorimeter of ATLAS experiment at the Large Hadron Collider (LHC). TileCal uses iron absorbers and scintillators as active material and it covers the central region |η| < 1.7. Jointly with the other calorimeters it is designed for measurements of hadrons, jets, tau-particles and missing transverse energy. It also assists in muon identification. TileCal is regularly monitored and calibrated by several different calibration systems: a Cs radioactive source that illuminates the scintillating tiles directly, a laser light system to directly test the PMT response, and a charge injection system (CIS) for the front-end electronics. These calibrations systems, in conjunction with data collected during proton-proton collisions, provide extensive monitoring of the instrument and a means for equalizing the calorimeter response at each stage of the signal propagation. The performance of the calorimeter has been established with cosmic ray muons and the large sa...

  17. Calibration and Performance of the ATLAS Tile Calorimeter during the LHC Run 2

    CERN Document Server

    Faltova, Jana; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) covers the central part of the ATLAS experiment and provides important information for the reconstruction of hadrons, jets, hadronic decays of tau leptons and missing transverse energy. This sampling hadronic calorimeter uses steel plates as absorber and scintillating tiles as active medium. The light produced by charged particles in tiles is transmitted by wavelength-shifting fibres to photomultipliers, where it is converted to electric pulses and further processed by the on-detector electronics located in the outermost part of the calorimeter. The TileCal calibration system comprises Cesium radioactive sources, laser, charge injection elements and an integrator based readout system. Combined information from all systems allows to monitor and equalize the calorimeter response at each stage of the signal production, from scintillation light to digitisation. The performance of the calorimeter is established with the large sample of the proton-proton collisions. Isolated hadrons a...

  18. Calibration and performance of the ATLAS Tile Calorimeter during the Run 2 of the LHC

    CERN Document Server

    Solovyanov, Oleg; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) is a hadronic calorimeter covering the central region of the ATLAS experiment at the LHC. It is a non-compensating sampling calorimeter comprised of steel and scintillating plastic tiles which are read-out by photomultiplier tubes (PMTs). The TileCal is regularly monitored and calibrated by several different calibration systems: a Cs radioactive source that illuminates the scintillating tiles directly, a laser light system to directly test the PMT response and a charge injection system (CIS) for the front-end electronics. These calibrations systems, in conjunction with data collected during proton-proton collisions, provide extensive monitoring of the instrument and a means for equalising the calorimeter response at each stage of the signal propagation. The performance of the calorimeter and its calibration has been established with cosmic ray muons and the large sample of the proton-proton collisions to study the energy response at the electromagnetic scale, probe of the hadron...

  19. Atlas barrel electromagnetic calorimeter performance study. Measurement of the Forward-Backward asymmetry in the qq-bar {yields} Z/{gamma}{sup *} {yields} e{sup +}e{sup -} events; Etude des performances du calorimetre electromagnetique tonneau d'ATLAS. Mesure de l'asymetrie Avant-Arriere dans les evenements qq-bar {yields} Z/{gamma}{sup *} {yields} e{sup +}e{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Aharrouche, M

    2006-12-15

    The start up of the ATLAS experiment at the CERN LHC is planned for the year 2007. The physics program of the experiment covers a wide field, going from tests of Standard Model (Higgs boson discovery) to new theories beyond the Standard Model (Supersymmetry, extra dimensions... etc). The work presented in this thesis has been made within the framework of the preparation of this experiment. After having presented the 2004 combined run, its installation, pedestal data and calibration data analysis, we develop a method for calibrating the energy measurement based on Geant4 Monte-Carlo simulation of the combined run. These simulations are done in the general framework developed for the analysis of the ATLAS data. We present then the performance studies of the electromagnetic calorimeter as well as the results obtained: a sampling term of the energy resolution of 10.6% GeV and local constant term of 0.43%, a non-uniformity of response of 0.44% giving a total constant term of 0.6% and a linearity better than 0.2% for electrons energies between 20 and 250 GeV. Concerning the 'physics' side of this thesis, we show a first study on the determination of the effective weak mixing angle, sin{sup 2}({theta}(lept,eff) with one precision better than the current results, 10{sup -4}. To reach such a precision it has been necessary to identify the electrons in the forward regions of the detector. This point is the subject of the last part of this manuscript, it shows that one can reach an electron-jet rejection of 100 with an efficiency of the electrons reconstruction of 50%, by using a discriminating analysis based on the methods of Fisher, the likelihood and the neural networks. (author)

  20. CMS L1 Calorimeter Trigger performance in 2016 data

    CERN Document Server

    CMS Collaboration

    2016-01-01

    After the first long shutdown, the LHC has restarted at a centre-of-mass energy of 13 TeV. The LHC is expected to achieve an instantaneous luminosity larger than $10^{34}$ $\\mathrm{cm}^{-2}\\cdot\\mathrm{s}^{-1}$ and an average number of pile-up interactions of at least 40. The CMS Level-1 trigger architecture has undergone a full upgrade in order to maintain and improve the trigger performance under these new conditions. It will allow CMS to keep the trigger rate under control and to avoid a significant increase in trigger thresholds that would have a negative impact on the CMS physics program. First studies of the performance of the calorimeter trigger upgrade for electrons, photons, tau leptons, jets and energy sums are shown. Details of the algorithms and commissioning may be found in CMS-DP-2015-009, CMS-DP-2015-003, CMS-DP-2015-051 and the CMS Technical Design Report for the Level-1 Trigger upgrade: CERN-LHCC-2013-011, CMS-TDR-12 (2013).

  1. Extraction Method of Fine Granular Performance from Scintillator Strip Electromagnetic Calorimeter

    CERN Document Server

    Kotera, Katsushige; Miyamoto, Akiya; Takeshita, Tohru

    2014-01-01

    We describe an algorithm which has been developed to extract fine granularity information from an electromagnetic calorimeter with strip-based readout. Such a calorimeter, based on scintillator strips, is being developed to apply particle flow reconstruction to future experiments in high energy physics. Tests of this algorithm in full detector simulations, using strips of size 45 x 5 mm^2 show that the performance is close to that of a calorimeter with true 5 x 5 mm^2 readout granularity. The performance can be further improved by the use of 10 x 10 mm^2 tile- shaped layers interspersed between strip layers.

  2. ATLAS LAr Calorimeter Performance in LHC Run-2

    CERN Document Server

    Yatsenko, Elena; The ATLAS collaboration

    2017-01-01

    The ATLAS detector was designed and built to study proton-proton collisions produced at the LHC at centre-of-mass energies up to 14 TeV and instantaneous luminosities up to 1034 cm−2 s−1. Liquid argon (LAr) sampling calorimeters are employed for all electromagnetic calorimetry in the pseudo-rapidity region |η| < 3.2, and for hadronic calorimetry in the region from |η| = 1.5 to |η| = 4.9. In the first LHC run a total luminosity of 27 fb−1 has been collected at center-of-mass energies of 7-8 TeV between year of 2010 to 2012. Following a period of detector consolidation during a long shutdown, Run-2 started with approximately 3.9 fb-1 and 35.6 fb-1 of data at a center-of-mass energy of 13 TeV recorded in 2015 and 2016, respectively. In order to realize the level-1 acceptance rate of 100 kHz in Run-2 data taking, number of read-out samples for the energy and the time measurement has been modified from five to four with keeping the expected performance. The well calibrated and highly granular Liquid Ar...

  3. LAr Calorimeter Performance and Commissioning for LHC Run-2

    CERN Document Server

    Spettel, Fabian; The ATLAS collaboration

    2015-01-01

    The ATLAS detector was built to study proton-proton collisions produced by the Large Hadron Collider (LHC) at a center of mass energy of up to 14 TeV. The Liquid Argon (LAr) calorimeters are used for all electromagnetic calorimetry as well as the hadronic calorimetry in the endcap and forward regions. They have shown excellent performance during the first LHC data taking campaign, from 2010 to 2012, so-called Run 1, at a peak luminosity of $8 \\times 10^{33} \\text{cm}^{-2}\\text{s}^{-1}$. During the next run, peak luminosities of $1.5 \\times 10^{34} \\text{cm}^{-2}\\text{s}^{-1}$ and even higher are expected at a 25ns bunch spacing. Such a high collision rate may have an impact on the quality of the energy reconstruction which is attempted to be maintained at a high level using a calibration procedure described in this contribution. It also poses major challenges to the first level of the trigger system which is constrained to a maximal rate of 100 kHz. For Run-3, scheduled to start in 2019, instantaneous luminos...

  4. Performance of the ATLAS Level-1 muon barrel trigger during the Run 2 data taking

    CERN Document Server

    Sessa, Marco; The ATLAS collaboration

    2017-01-01

    The Level-1 Muon Barrel Trigger is one of the main elements of the event selection of the ATLAS experiment at the Large Hadron Collider. It exploits the Resistive Plate Chambers (RPC) detectors to generate the trigger signal. The RPCs are placed in the barrel region of the ATLAS experiment: they are arranged in three concentric double layers and operate in a strong magnetic toroidal field. RPC detectors cover the pseudo-rapidity range |η| < 1.05 for a total surface of more than 4000 m 2 and about 3600 gas volumes. The Level-1 Muon Trigger in the barrel region allows to select muon candidates according to their transverse momentum and associates them with the correct bunch-crossing. The trigger system is able to take a decision within a latency of about 2 μs. The measurement of the RPC detector efficiencies and the trigger performance during the ATLAS Run-II data taking are here presented.

  5. Performance of the Signal Vacuum Cables of the Liquid Argon Calorimeter Endcap Cryostat Signal Feedthroughs

    CERN Document Server

    Axen, D A; Dowling, A; Dowling, A S; Fincke-Keeler, M; Hodges, T; Holness, F; Ince, T; Keeler, Richard K; Langstaf, R; Lefebvre, M; Lenckowski, M; Lindner, J; MacDonald, R; McDonald, R; Muzzeral, E; Poffenberger, P R; Van Uytven, J; Vowles, G; Wiggins, W

    2003-01-01

    This note presents of brief summary of the design specification and the performance under test of the signal vacuum cables which are used in the signal feedthroughs of the ATLAS liquid argon calorimeter endcap cryostats.

  6. Readiness of the ATLAS Liquid Argon Calorimeter for LHC Collisions

    CERN Document Server

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Solans, C A; Solar, M; Solfaroli-Camillocci, E; Solodkov, A A; Solovyanov, O V; Soluk, R; Sondericker, J; Sopko, V; Sopko, B; Sosebee, M; Sosnovtsev, V V; Sospedra-Suay, L; Soukharev, A; Spagnolo, S; Spanò, F; Speckmayer, P; Spencer, E; Spighi, R; Spigo, G; Spila, F; Spiwoks, R; Spousta, M; Spreitzer, T; Spurlock, B; St Denis, R D; Stahl, T; Stamen, R; Stancu, S N; Stanecka, E; Stanek, R W; Stanescu, C; Stapnes, S; Starchenko, E A; Stark, J; Staroba, P; Starovoitov, P; Stastny, J; Staude, A; Stavina, P; Stavropoulos, G; Steinbach, P; Steinberg, P; Stekl, I; Stelzer, B; Stelzer, H J; Stelzer-Chilton, O; Stenzel, H; Stevenson, K; Stewart, G; Stockton, M C; Stoerig, K; Stoicea, G; Stonjek, S; Strachota, P; Stradling, A; Straessner, A; Strandberg, J; Strandberg, S; Strandlie, A; Strauss, M; Strizenec, P; Ströhmer, R; Strom, D M; Strong, J A; Stroynowski, R; Strube, J; Stugu, B; Stumer, I; Soh, D A; Su, D; Suchkov, S I; Sugaya, Y; Sugimoto, T; Suhr, C; Suk, M; Sulin, V V; Sultansoy, S; Sumida, T; Sun, X; Sundermann, J E; Suruliz, K; Sushkov, S; Susinno, G; Sutton, M R; Suzuki, T; Suzuki, Y; Sviridov, Yu M; Sykora, I; Sykora, T; Szymocha, T; Sánchez, J; Ta, D; Tackmann, K; Taffard, A; Tafirout, R; Taga, A; Takahashi, Y; Takai, H; Takashima, R; Takeda, H; Takeshita, T; Talby, M; Talyshev, A; Tamsett, M C; Tanaka, J; Tanaka, R; Tanaka, S; Tanaka, S; Tappern, G P; Tapprogge, S; Tardif, D; Tarem, S; Tarrade, F; Tartarelli, G F; Tas, P; Tasevsky, M; Tassi, E; Taylor, C; Taylor, F E; Taylor, G N; Taylor, R P; Taylor, W; Teixeira-Dias, P; Ten Kate, H; Teng, P K; Terada, S; Terashi, K; Terron, J; Terwort, M; Testa, M; Teuscher, R J; Tevlin, C M; Thadome, J; Thananuwong, R; Thioye, M; Thoma, S; Thomas, J P; Thomas, T L; Thompson, E N; Thompson, P D; Thompson, P D; Thompson, R J; Thompson, A S; Thomson, E; Thun, R P; Tic, T; Tikhomirov, V O; Tikhonov, Y A; Timmermans, C J W P; Tipton, P; Tique-Aires-Viegas, F J; Tisserant, S; Tobias, J; Toczek, B; Todorov, T; Todorova-Nova, S; Toggerson, B; Tojo, J; Tokár, S; Tokushuku, K; Tollefson, K; Tomasek, L; Tomasek, M; Tomasz, F; Tomoto, M; Tompkins, D; Tompkins, L; Toms, K; Tong, G; Tonoyan, A; Topfel, C; Topilin, N D; Torrence, E; Torró Pastor, E; Toth, J; Touchard, F; Tovey, D R; Tovey, S N; Trefzger, T; Tremblet, L; Tricoli, A; Trigger, I M; Trincaz-Duvoid, S; Trinh, T N; Tripiana, M F; Triplett, N; Trivedi, A; Trocmé, B; Troncon, C; Trzupek, A; Tsarouchas, C; Tseng, J C-L; Tsiafis, I; Tsiakiris, M; Tsiareshka, P V; Tsionou, D; Tsipolitis, G; Tsiskaridze, V; Tskhadadze, E G; Tsukerman, I I; Tsulaia, V; Tsung, J-W; Tsuno, S; Tsybychev, D; Turala, M; Turecek, D; Turk Cakir, I; Turlay, E; Tuts, P M; Twomey, M S; Tylmad, M; Tyndel, M; Tzanakos, G; Uchida, K; Ueda, I; Uhlenbrock, M; Uhrmacher, M; Ukegawa, F; Unal, G; Underwood, D G; Undrus, A; Unel, G; Unno, Y; Urbaniec, D; Urkovsky, E; Urquijo, P; Urrejola, P; Usai, G; Uslenghi, M; Vacavant, L; Vacek, V; Vachon, B; Vahsen, S; Valenta, J; Valente, P; Valentinetti, S; Valkar, S; Valladolid Gallego, E; Vallecorsa, S; Valls Ferrer, J A; Van Berg, R; van der Graaf, H; van der Kraaij, E; van der Poel, E; Van Der Ster, D; van Eldik, N; van Gemmeren, P; van Kesteren, Z; van Vulpen, I; Vandelli, W; Vandoni, G; Vaniachine, A; Vankov, P; Vannucci, F; Varela Rodriguez, F; Vari, R; Varnes, E W; Varouchas, D; Vartapetian, A; Varvell, K E; Vasilyeva, L; Vassilakopoulos, V I; Vazeille, F; Vegni, G; Veillet, J J; Vellidis, C; Veloso, F; Veness, R; Veneziano, S; Ventura, A; Ventura, D; Venturi, M; Venturi, N; Vercesi, V; Verducci, M; Verkerke, W; Vermeulen, J C; Vetterli, M C; Vichou, I; Vickey, T; Viehhauser, G H A; Villa, M; Villani, E G; Villaplana Perez, M; Villate, J; Vilucchi, E; Vincter, M G; Vinek, E; Vinogradov, V B; Viret, S; Virzi, J; Vitale, A; Vitells, O V; Vivarelli, I; Vives Vaques, F; Vlachos, S; Vlasak, M; Vlasov, N; Vogt, H; Vokac, P; Volpi, M; Volpini, G; von der Schmitt, H; von Loeben, J; von Radziewski, H; von Toerne, E; Vorobel, V; Vorobiev, A P; Vorwerk, V; Vos, M; Voss, R; Voss, T T; Vossebeld, J H; Vranjes, N; Vranjes Milosavljevic, M; Vrba, V; Vreeswijk, M; Vu Anh, T; Vudragovic, D; Vuillermet, R; Vukotic, I; Wagner, P; Wahlen, H; Walbersloh, J; Walder, J; Walker, R; Walkowiak, W; Wall, R; Wang, C; Wang, H; Wang, J; Wang, J C; Wang, S M; Ward, C P; Warsinsky, M; Wastie, R; Watkins, P M; Watson, A T; Watson, M F; Watts, G; Watts, S; Waugh, A T; Waugh, B M; Webel, M; Weber, J; Weber, M D; Weber, M; Weber, M S; Weber, P; Weidberg, A R; Weingarten, J; Weiser, C; Wellenstein, H; Wells, P S; Wen, M; Wenaus, T; Wendler, S; Wengler, T; Wenig, S; Wermes, N; Werner, M; Werner, P; Werth, M; Werthenbach, U; Wessels, M; Whalen, K; Wheeler-Ellis, S J; Whitaker, S P; White, A; White, M J; White, S; Whiteson, D; Whittington, D; Wicek, F; Wicke, D; Wickens, F J; Wiedenmann, W; Wielers, M; Wienemann, P; Wiglesworth, C; Wiik, L A M; Wildauer, A; Wildt, M A; Wilhelm, I; Wilkens, H G; Williams, E; Williams, H H; Willis, W; Willocq, S; Wilson, J A; Wilson, M G; Wilson, A; Wingerter-Seez, I; Winklmeier, F; Wittgen, M; Wolter, M W; Wolters, H; Wosiek, B K; Wotschack, J; Woudstra, M J; Wraight, K; Wright, C; Wright, D; Wrona, B; Wu, S L; Wu, X; Wulf, E; Xella, S; Xie, S; Xie, Y; Xu, D; Xu, N; Yamada, M; Yamamoto, A; Yamamoto, S; Yamamura, T; Yamanaka, K; Yamaoka, J; Yamazaki, T; Yamazaki, Y; Yan, Z; Yang, H; Yang, U K; Yang, Y; Yang, Z; Yao, W-M; Yao, Y; Yasu, Y; Ye, J; Ye, S; Yilmaz, M; Yoosoofmiya, R; Yorita, K; Yoshida, R; Young, C; Youssef, S P; Yu, D; Yu, J; Yu, M; Yu, X; Yuan, J; Yuan, L; Yurkewicz, A; Zaidan, R; Zaitsev, A M; Zajacova, Z; Zambrano, V; Zanello, L; Zarzhitsky, P; Zaytsev, A; Zeitnitz, C; Zeller, M; Zema, P F; Zemla, A; Zendler, C; Zenin, O; Zenis, T; Zenonos, Z; Zenz, S; Zerwas, D; Zevi della Porta, G; Zhan, Z; Zhang, H; Zhang, J; Zhang, Q; Zhang, X; Zhao, L; Zhao, T; Zhao, Z; Zhemchugov, A; Zheng, S; Zhong, J; Zhou, B; Zhou, N; Zhou, Y; Zhu, C G; Zhu, H; Zhu, Y; Zhuang, X; Zhuravlov, V; Zilka, B; Zimmermann, R; Zimmermann, S; Zimmermann, S; Ziolkowski, M; Zitoun, R; Zivkovic, L; Zmouchko, V V; Zobernig, G; Zoccoli, A; zur Nedden, M; Zutshi, V

    2010-01-01

    The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing performance, electronics noise, and gain stability are presented. High energy deposits from radiative cosmic muons and beam splash events allow to check the intrinsic constant term of the energy resolution. The uniformity of the electromagnetic barrel calorimeter response along eta (averaged over phi) is measured at the percent level using minimum ionizing cosmic muons. Finally, studies of electromagnetic showers from radiative muons have been used to cross-check the Monte Carlo simulation. The performance results obtained u...

  7. CALIFA Barrel prototype detector characterisation

    Energy Technology Data Exchange (ETDEWEB)

    Pietras, B., E-mail: benjamin.pietras@usc.es [Universidade de Santiago de Compostela, E-15782 (Spain); Gascón, M. [Universidade de Santiago de Compostela, E-15782 (Spain); Lawrence Berkeley National Laboratory, 1 Cyclotron Rd. Berkeley, CA 94701 (United States); Álvarez-Pol, H. [Universidade de Santiago de Compostela, E-15782 (Spain); Bendel, M. [Technische Universität München, 80333 (Germany); Bloch, T. [Technische Universität Darmstadt, D-64289 Darmstadt (Germany); Casarejos, E. [Universidade de Vigo, E-36310 (Spain); Cortina-Gil, D.; Durán, I. [Universidade de Santiago de Compostela, E-15782 (Spain); Fiori, E. [Gesellschaft für Schwerionenforschung (GSI), D-64291 Darmstadt (Germany); Gernhäuser, R. [Technische Universität München, 80333 (Germany); González, D. [Universidade de Santiago de Compostela, E-15782 (Spain); Kröll, T. [Technische Universität Darmstadt, D-64289 Darmstadt (Germany); Le Bleis, T. [Technische Universität München, 80333 (Germany); Montes, N. [Universidade de Santiago de Compostela, E-15782 (Spain); Nácher, E. [Instituto de Estructura de la Materia, CSIC, E-28006 Madrid (Spain); Robles, M. [Universidade de Santiago de Compostela, E-15782 (Spain); Perea, A. [Instituto de Estructura de la Materia, CSIC, E-28006 Madrid (Spain); Vilán, J.A. [Universidade de Vigo, E-36310 (Spain); Winkel, M. [Technische Universität München, 80333 (Germany)

    2013-11-21

    Well established in the field of scintillator detection, Caesium Iodide remains at the forefront of scintillators for use in modern calorimeters. Recent developments in photosensor technology have lead to the production of Large Area Avalanche Photo Diodes (LAAPDs), a huge advancement on traditional photosensors in terms of high internal gain, dynamic range, magnetic field insensitivity, high quantum efficiency and fast recovery time. The R{sup 3}B physics programme has a number of requirements for its calorimeter, one of the most challenging being the dual functionality as both a calorimeter and a spectrometer. This involves the simultaneous detection of ∼300MeV protons and gamma rays ranging from 0.1 to 20 MeV. This scintillator – photosensor coupling provides an excellent solution in this capacity, in part due to the near perfect match of the LAAPD quantum efficiency peak to the light output wavelength of CsI(Tl). Modern detector development is guided by use of Monte Carlo simulations to predict detector performance, nonetheless it is essential to benchmark these simulations against real data taken with prototype detector arrays. Here follows an account of the performance of two such prototypes representing different polar regions of the Barrel section of the forthcoming CALIFA calorimeter. Measurements were taken for gamma–ray energies up to 15.1 MeV (Maier-Leibnitz Laboratory, Garching, Germany) and for direct irradiation with a 180 MeV proton beam (The Svedberg Laboratoriet, Uppsala, Sweden). Results are discussed in light of complementary GEANT4 simulations. -- Highlights: •Prototypes corresponding to different sections of the forthcoming CALIFA Barrel calorimeter were tested. •The response to both high energy gamma rays and high energy protons was observed. •This response was reproduced by use of R3BROOT simulations, the geometry extrapolated to predict performance of the complete calorimeter. •Effects such as energy straggling of wrapping

  8. Performance of the D0 end calorimeter electromagnetic module

    Energy Technology Data Exchange (ETDEWEB)

    Aihara, Hiroaki.

    1990-10-01

    We have constructed a uranium liquid argon calorimeter which serves as the end calorimeter electromagnetic module for the DO experiment at Fermilab. We present details of the construction and the results of the tests made using electron beams ranging from 10 GeV to 150 GeV. We find the energy resolution is 15.5%/{radical}E(GeV) with a small constant term of {approximately}0.5% and the response is linear to better than {plus minus}0.5%. 5 refs., 7 figs.

  9. The design and performance of the electromagnetic calorimeters in Hall C at Jefferson Lab

    Energy Technology Data Exchange (ETDEWEB)

    Vardan Tadevosyan, Hamlet Mkrtchyan, Arshak Asaturyan, Arthur Mkrtchyan, Simon Zhamkochyan

    2012-12-01

    The design and performance of the electromagnetic calorimeters in the magnetic spectrometers in Hall C at Jefferson Lab are presented. For the existing HMS and SOS spectrometers, construction information and comparisons of simulated and experimental results are presented. The design and simulated performance for a new calorimeter to be used in the new SHMS spectrometer is also presented. We have developed and constructed electromagnetic calorimeters from TF-1 type lead-glass blocks for the HMS and SOS magnetic spectrometers at JLab Hall C. The HMS/SOS calorimeters are of identical design and construction except for their total size. Blocks of dimension 10 cm × 10 cm × 70 cm are arranged in four planes and stacked 13 and 11 blocks high in the HMS and SOS respectively. The energy resolution of these calorimeters is better than 6%/√E, and pion/electron (π/e) separation of about 100:1 has been achieved in energy range 1–5 GeV. Good agreement has been observed between the experimental and GEANT4 simulated energy resolutions. The HMS/SOS calorimeters have been used nearly in all Hall C experiments, providing good energy resolution and a high pion suppression factor. No significant deterioration in their performance has been observed in the course of use since 1994. For the SHMS spectrometer, presently under construction, details on the calorimeter design and accompanying GEANT4 simulation efforts are given. A Preshower+Shower design was selected as the most cost-effective among several design choices. The preshower will consist of a layer of 28 modules with TF-1 type lead glass radiators, stacked in two columns. The shower part will consist of 224 modules with F-101 type lead glass radiators, stacked in a “fly's eye” configuration of 14 columns and 16 rows. The active area of 120 × 130 cm(2) will encompass the beam envelope at the calorimeter. The anticipated performance of the new calorimeter is simulated over the full momentum range of the SHMS, predicting

  10. A calorimeter for multilayer insulation (MLI) performance measurements at variable temperature

    Science.gov (United States)

    Celik, D.; Hurd, J.; Klimas, R.; Van Sciver, S. W.

    2013-05-01

    Here we describe a concentric cylindrical calorimeter with radiation guards developed to measure the thermal performance of multilayer insulation (MLI) for low temperature applications. One unique feature of this calorimeter is its ability to independently control the boundary temperatures between room temperature and about 15 K using two single-stage Gifford-McMahon cryocoolers. Also, unlike the existing calorimeters that use the evaporation rate of a liquid cryogen to measure the heat load, in the present system the total heat transfer through the MLI is measured by recording the temperature difference across a calibrated heat load support rod that connects the cold inner cylinder to the lower temperature cryocooler. This design allows the continuous mapping of MLI performance over a much wider temperature range with independently controlled boundary conditions. The calorimeter is also suitable for performing a variety of radiation heat transfer experiments including the determination of the temperature dependence of the total emissivity.

  11. Performance of the ATLAS Calorimeters and Commissioning for LHC Run-2

    CERN Document Server

    Rossetti, Valerio; The ATLAS collaboration

    2015-01-01

    The ATLAS general-purpose experiment at the Large Hadron Collider (LHC) is equipped with electromagnetic and hadronic liquid-argon (LAr) calorimeters and a hadronic scintillator-steel sampling calorimeter (TileCal) for measuring energy and direction of final state particles in the pseudorapidity range $|\\eta| < 4.9$. The calibration and performance of the calorimetry system was established during beam tests, cosmic ray muon measurements and in particular the first three years of pp collision data-taking. During this period, referred to as Run-1, approximately 27~fb$^{-1}$ of data have been collected at the center-of-mass energies of 7 and 8~TeV. Results on the calorimeter operation, monitoring and data quality, as well as their performance will be presented, including the calibration and stability of the electromagnetic scale, response uniformity and time resolution. These results demonstrate that the LAr and Tile calorimeters perform excellently within their design requirements. The calorimetry system thu...

  12. Digital Filtering Performance in the ATLAS Level-1 Calorimeter Trigger

    CERN Document Server

    Hadley, D R; The ATLAS collaboration

    2010-01-01

    The ATLAS Level-1 Calorimeter Trigger is a hardware-based system designed to identify high-pT jets, elec- tron/photon and tau candidates, and to measure total and missing ET in the ATLAS Liquid Argon and Tile calorimeters. It is a pipelined processor system, with a new set of inputs being evaluated every 25ns. The overall trigger decision has a latency budget of 2µs, including all transmission delays. The calorimeter trigger uses about 7200 reduced granularity analogue signals, which are first digitized at the 40 MHz LHC bunch-crossing frequency, before being passed to a digital Finite Impulse Re- sponse (FIR) filter. Due to latency and chip real-estate constraints, only a simple 5-element filter with limited precision can be used. Nevertheless, this filter achieves a significant reduction in noise, along with improving the bunch-crossing assignment and energy resolution for small signals. The context in which digital filters are used for the ATLAS Level-1 Calorimeter Trigger is presented, before descr...

  13. Digital Filter Performance for the ATLAS Level-1 Calorimeter Trigger

    CERN Document Server

    Hadley, D R; The ATLAS collaboration

    2010-01-01

    The ATLAS Level-1 Calorimeter Trigger is a hardware-based system designed to identify high-pT jets, electron/photon and tau candidates, and to measure total and missing ET in the ATLAS Liquid Argon and Tile calorimeters. It is a pipelined processor system, with a new set of inputs being evaluated every 25ns. The overall trigger decision has a latency budget of 2µs, including all transmission delays. The calorimeter trigger uses about 7200 reduced granularity analogue signals, which are first digitized at the 40 MHz LHC bunch-crossing frequency, before being passed to a digital Finite Impulse Response (FIR) filter. Due to latency and chip real-estate constraints, only a simple 5-element filter with limited precision can be used. Nevertheless this filter achieves a significant reduction in noise, along with improving the bunch-crossing assignment and energy resolution for small signals. The context in which digital filters are used for the ATLAS Level-1 Calorimeter Trigger will be presented, before describing ...

  14. Design, performance, and calibration of CMS forward calorimeter wedges

    Energy Technology Data Exchange (ETDEWEB)

    Abdullin, S. [Fermi National Accelerator Lab., Batavia, IL (United States)]|[Univ. of Maryland, College Park, MD (United States); Abramov, V.; Goncharov, P.; Kalinin, A.; Khmelnikov, A.; Korablev, A.; Korneev, Y.; Krinitsyn, A.; Kryshkin, V.; Lukanin, V.; Pikalov, V.; Ryazanov, A.; Talov, V.; Turchanovich, L.; Volkov, A. [IHEP, Protvino (Russian Federation); Acharya, B.; Banerjee, Sud.; Banerjee, Sun.; Chendvankar, S.; Dugad, S.; Kalmani, S.; Katta, S.; Mazumdar, K.; Mondal, N.; Nagaraj, P.; Patil, M.; Reddy, L.; Satyanarayana, B.; Sharma, S.; Verma, P. [Tata Inst. of Fundamental Research, Mumbai (India); Adams, M.; Burchesky, K.; Qiang, W. [Univ. of Illinois, Chicago, IL (United States); Akchurin, N.; Carrell, K.; Guemues, K.; Kim, H.; Spezziga, M.; Thomas, R.; Wigmans, R. [Texas Tech Univ., Dept. of Physics, Lubbock, TX (United States); Akgun, U.; Ayan, S.; Duru, F.; Merlo, J.P.; Mestvirishvili, A.; Miller, M.; Norbeck, E.; Olson, J.; Onel, Y.; Schmidt, I. [Univ. of Iowa, Iowa City, IA (United States); Anderson, E.W.; Hauptman, J. [Iowa State Univ., Ames, IA (United States); Antchev, G.; Arcidy, M.; Hazen, E.; Lawlor, C.; Machado, E.; Posch, C.; Rohlf, J.; Sulak, L.; Varela, F.; Wu, S.X. [Boston Univ., MA (United States); Aydin, S.; Bakirci, M.N.; Cerci, S.; Dumanoglu, I.; Eskut, E.; Kayis-Topaksu, A.; Koylu, S.; Kurt, P.; Kuzucu-Polatoz, A.; Onengut, G.; Ozdes-Koca, N.; Ozkurt, H.; Sogut, K.; Topakli, H.; Vergili, M.; Yetkin, T. [Cukurova Univ., Adana (Turkey); Baarmand, M.; Mermerkaya, H.; Vodopiyanov, I. [Florida Inst. of Tech., Melbourne, FL (United States); Babich, K.; Golutvin, I.; Kalagin, V.; Kosarev, I.; Ladygin, V.; Mescheryakov, G.; Moissenz, P.; Petrosyan, A.; Rogalev, E.; Smirnov, V.; Vishnevskiy, A.; Volodko, A.; Zarubin, A. [JINR, Dubna (Russian Federation); Baden, D.; Bard, R.; Eno, S.; Grassi, T.; Jarvis, C.; Kellogg, R.; Kunori, S.; Skuja, A.; Wang, L.; Wetstein, M. [Univ. of Maryland, College Park, MD (United States)] [and others

    2008-01-15

    We report on the test beam results and calibration methods using high energy electrons, pions and muons with the CMS forward calorimeter (HF). The HF calorimeter covers a large pseudorapidity region (3{<=} vertical stroke {eta} vertical stroke {<=}5), and is essential for a large number of physics channels with missing transverse energy. It is also expected to play a prominent role in the measurement of forward tagging jets in weak boson fusion channels in Higgs production. The HF calorimeter is based on steel absorber with embedded fused-silica-core optical fibers where Cherenkov radiation forms the basis of signal generation. Thus, the detector is essentially sensitive only to the electromagnetic shower core and is highly non-compensating (e/h{approx}5). This feature is also manifest in narrow and relatively short showers compared to similar calorimeters based on ionization. The choice of fused-silica optical fibers as active material is dictated by its exceptional radiation hardness. The electromagnetic energy resolution is dominated by photoelectron statistics and can be expressed in the customary form as (a)/({radical}(E))+b. The stochastic term a is 198% and the constant term b is 9%. The hadronic energy resolution is largely determined by the fluctuations in the neutral pion production in showers, and when it is expressed as in the electromagnetic case, a=280% and b=11%. (orig.)

  15. Performance and Calibration of CASTOR Calorimeter at CMS

    CERN Document Server

    Kuznetsova, Ekaterina

    2012-01-01

    CASTOR trigger was developed and activated during beam injections and ramp-ups. The triggered events correspond to an isolated particle penetrating the calorimeter parallel to the beam axis. Analysis of the obtained spectra provides relative response to a muon per individual read-out channel. An absolute CASTOR calibration is not discussed here.

  16. The ATLAS Tile Calorimeter performance at LHC in pp collisions at 7 TeV

    Directory of Open Access Journals (Sweden)

    Bertolucci Federico

    2012-06-01

    Full Text Available The Tile Calorimeter (TileCal, the central section of the hadronic calorimeter of the ATLAS experiment, is a key detector component to detect hadrons, jets and taus and to measure the missing transverse energy. Due to the very good muon signal to noise ratio it assists the muon spectrometer in the identification and reconstruction of muons. The performance of the calorimeter has been measured and monitored using calibration data, random triggered data, cosmic muons, splash events and more importantly LHC collision events. The results presented assess the absolute energy scale calibration precision, the energy and timing uniformity and the synchronization precision. The results demonstrate a very good understanding of the performance of the Tile Calorimeter that is well within the design expectations.

  17. Calibration of the electromagnetic barrel calorimeter. Identification of the tau leptons and search for a Higgs boson in the channel qqH {yields} qq {tau}{tau} in the Atlas experiment at LHC; Etalonnage du calorimetre electromagnetique tonneau. Identification des leptons taus et recherche d'un boson de Higgs dans le canal qqH {yields} qq {tau}{tau} dans l'experience ATLAS au LHC

    Energy Technology Data Exchange (ETDEWEB)

    Tarrade, F

    2006-09-15

    The Standard Model is the theory which describes the fundamental interactions most accurately. However, the Higgs mechanism and its associated boson have not yet been discovered. The ATLAS electromagnetic calorimeter will play an important role in its discovery if it exists. In the first part of this work, a final mapping of all barrel electromagnetic calorimeter cells, and in particular the problematic ones, was made. Then, the code for the calorimeter calibration was migrated into the ATLAS software environment (ATHENA), where it was tested and validated with the 2004 test beam data. In this code, the optimal filtering coefficients, which enable to reconstruct the energy deposited in the calorimeter while minimizing the electronic and pile-up noises, are calculated. For this, a model was developed to predict the physics signal waveform from the calibration waveform. In a third part, two algorithms for reconstructing and identifying {tau} leptons in their hadronic decay mode were studied and compared. Finally in a fourth part, one amongst the most important Standard Model Higgs production and decay channels was investigated, namely the weak boson fusion production followed by the Higgs decay into a tau lepton pair, for a low mass Higgs (115 < m{sub Higgs} < 145 GeV/c{sup 2}). This study was performed for 30 fb{sup -1} of integrated luminosity using fast and fully simulated data. A study of the dominant background Z + n jets (n {<=} 5) was also performed. (author)

  18. Performance Studies of the Full Length Prototype for the CASTOR Forward Calorimeter of the CMS Experiment

    CERN Document Server

    Basegmez, S; Gouskos, L; Katsas, P; Katkov, I; Khein, L

    2008-01-01

    CASTOR is a project of a forward \\v{C}erenkov sampling calorimeter for the CMS experiment at the LHC collider, with quartz plates as active medium and tungsten as absorber. Several prototypes of the calorimeter have been constructed and tested at CERN. Results of the beam test performed with a full length prototype in summer of 2007 at CERN SPS machine are reported here.

  19. Comparison of the Performance of Tungsten and Steel Hadronic Sampling Calorimeters

    CERN Document Server

    Speckmayer, P

    2012-01-01

    In this note the performance of tungsten and steel hadronic sampling calorimeters is studied using GEANT4 simulations. Various configurations with different sampling ratios and total calorimeter lengths for both materials have been investigated. Pions of up to 300 GeV have been simulated in all configurations and the energy has been reconstructed using a neural network. Taking into account leakage and intrinsic resolution for the different calorimeter configurations, an optimal configuration depending on the HCAL size has been found. The impact of a tail-catcher providing information on leakage into the coil, which will be outside of the calorimeters and constraining their size in future high energy collider experiments, has also been studied.

  20. First performance studies of a prototype for the CASTOR forward calorimeter at the CMS experiment

    CERN Document Server

    Aslanoglou, Xenofon; Davis, N; D'Enterria, David; Gladysz-Dziadus, Ewa; Kalfas, Costas; Musienko, Yuri; Kuznetsov, Andrey; Panagiotou, Apostolos

    2008-01-01

    We present results of the performance of the first prototype of the CASTOR quartz-tungsten sampling calorimeter, to be installed in the very forward region of the CMS experiment at the LHC. This study includes GEANT Monte Carlo simulations of the Cerenkov light transmission efficiency of different types of air-core light guides, as well as analysis of the calorimeter linearity and resolution as a function of energy and impact-point, obtained with 20-200 GeV electron beams from CERN/SPS tests in 2003. Several configurations of the calorimeter have been tested and compared, including different combinations of (i) structures for the active material of the calorimeter (quartz plates and fibres), (ii) various light-guide reflecting material (glass and foil reflectors) and (iii) light-sensing devices (photomultipliers and avalanche photodiodes).

  1. A crystal barrel

    CERN Multimedia

    2007-01-01

    The production of crystals for the barrel of the CMS electromagnetic calorimeter has been completed. This is an important milestone for the experiment, which received the last of its 62,960 crystals on 9 March. The members of the team responsible for the crystal acceptance testing at CERN display the last crystal for the CMS electromagnetic calorimeter barrel. From left to right: Igor Tarasov, Etiennette Auffray and Hervé Cornet.One of the six machines specially developed to measure 67 different parameters on each crystal. Igor Tarasov is seen inserting the last batch of crystals into the machine. The last of the 62,960 CMS barrel crystals arrived at CERN on 9 March. Once removed from its polystyrene protection, this delicate crystal, like thousands of its predecessors, will be inserted into the last of the 36 supermodules of the barrel electromagnetic calorimeter in a few days' time. This marks the end of an important chapter in an almost 15-year-long journey by the CMS crystals team, some of whose member...

  2. 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.

  3. Analysis of the uniformity of the modules forming the barrel of the electromagnetic calorimeter of Atlas. Search for supplementary neutral gauge bosons; Analyse de l'uniformite des modules de serie du calorimetre electromagnetique tonneau d'ATLAS. Recherche de bosons de jauge supplementaires neutres

    Energy Technology Data Exchange (ETDEWEB)

    Gaumer, O

    2004-12-15

    Grand unification theories are a possible extension of the standard model. These theories imply the existence of an extra gauge boson: Z'. The study of the parameters of this boson in its electronic decays, especially its width, needs a good uniformity and a good resolution of the electromagnetic calorimeter. The first part of this thesis is dedicated to the study of the response of the barrel of the electromagnetic calorimeter to a 245 GeV electron beam. The major part of this work was the measurement of the uniformity. To perform this analysis the search of problematic channel has been made and corrections have been developed to take into account effect from the detector and to use all the recorded events. In the second part, I have studied the potential of Atlas in the study of the Z' decaying into lepton pairs (mainly in electron pairs). A study of the kinematic and of the background has been performed. This analysis deals with the possibility to distinguish different grand unification models, and with the possibility to discover the Z' boson, for masses from 1 TeV up to 4 TeV. (author)

  4. Performance Study of the CMS Barrel Resistive Plate Chambers with Cosmic Rays

    CERN Document Server

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    2010-01-01

    In October and November 2008, the CMS collaboration conducted a programme of cosmic ray data taking, which has recorded about 270 million events. The Resistive Plate Chamber system, which is part of the CMS muon detection system, was successfully operated in the full barrel. More than 98% of the channels were operational during the exercise with typical detection efficiency of 90%. In this paper, the performance of the detector during these dedicated runs is reported.

  5. Performance Study of the CMS Barrel Resistive Plate Chambers with Cosmic Rays

    CERN Document Server

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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

    In October and November 2008, the CMS collaboration conducted a programme of cosmic ray data taking, which has recorded about 270 million events. The Resistive Plate Chamber system, which is part of the CMS muon detection system, was successfully operated in the full barrel. More than 98% of the channels were operational during the exercise with typical detection efficiency of 90%. In this paper, the performance of the detector during these dedicated runs is reported.

  6. Performance of the Electronic Readout of the ATLAS Liquid Argon Calorimeters

    CERN Document Server

    Abreu, H; Aleksa, M; Aperio Bella, L; Archambault, JP; Arfaoui, S; Arnaez, O; Auge, E; Aurousseau, M; Bahinipati, S; Ban, J; Banfi, D; Barajas, A; Barillari, T; Bazan, A; Bellachia, F; Beloborodova, O; Benchekroun, D; Benslama, K; Berger, N; Berghaus, F; Bernat, P; Bernier, R; Besson, N; Binet, S; Blanchard, JB; Blondel, A; Bobrovnikov, V; Bohner, O; Boonekamp, M; Bordoni, S; Bouchel, M; Bourdarios, C; Bozzone, A; Braun, HM; Breton, D; Brettel, H; Brooijmans, G; Caputo, R; Carli, T; Carminati, L; Caughron, S; Cavalleri, P; Cavalli, D; Chareyre, E; Chase, RL; Chekulaev, SV; Chen, H; Cheplakov, A; Chiche, R; Citterio, M; Cojocaru, C; Colas, J; Collard, C; Collot, J; Consonni, M; Cooke, M; Copic, K; Costa, GC; Courneyea, L; Cuisy, D; Cwienk, WD; Damazio, D; Dannheim, D; De Cecco, S; De La Broise, X; De La Taille, C; de Vivie, JB; Debennerot, B; Delagnes, E; Delmastro, M; Derue, F; Dhaliwal, S; Di Ciaccio, L; Doan, O; Dudziak, F; Duflot, L; Dumont-Dayot, N; Dzahini, D; Elles, S; Ertel, E; Escalier, M; Etienvre, AI; Falleau, I; Fanti, M; Farooque, T; Favre, P; Fayard, Louis; Fent, J; Ferencei, J; Fischer, A; Fournier, D; Fournier, L; Fras, M; Froeschl, R; Gadfort, T; Gallin-Martel, ML; Gibson, A; Gillberg, D; Gingrich, DM; Göpfert, T; Goodson, J; Gouighri, M; Goy, C; Grassi, V; Gray, J; Guillemin, T; Guo, B; Habring, J; Handel, C; Heelan, L; Heintz, H; Helary, L; Henrot-Versille, S; Hervas, L; Hobbs, J; Hoffman, J; Hostachy, JY; Hoummada, A; Hrivnac, J; Hrynova, T; Hubaut, F; Huber, J; Iconomidou-Fayard, L; Iengo, P; Imbert, P; Ishmukhametov, R; Jantsch, A; Javadov, N; Jezequel, S; Jimenez Belenguer, M; Ju, XY; Kado, M; Kalinowski, A; Kar, D; Karev, A; Katsanos, I; Kazarinov, M; Kerschen, N; Kierstead, J; Kim, MS; Kiryunin, A; Kladiva, E; Knecht, N; Kobel, M; Koletsou, I; König, S; Krieger, P; Kukhtin, V; Kuna, M; Kurchaninov, L; Labbe, J; Lacour, D; Ladygin, E; Lafaye, R; Laforge, B; Lamarra, D; Lampl, W; Lanni, F; Laplace, S; Laskus, H; Le Coguie, A; Le Dortz, O; Le Maner, C; Lechowski, M; Lee, SC; Lefebvre, M; Leonhardt, K; Lethiec, L; Leveque, J; Liang, Z; Liu, C; Liu, T; Liu, Y; Loch, P; Lu, J; Ma, H; Mader, W; Majewski, S; Makovec, N; Makowiecki, D; Mandelli, L; Mangeard, PS; Mansoulie, B; Marchand, JF; Marchiori, G; Martin, D; Martin-Chassard, G; Martin dit Latour, B; Marzin, A; Maslennikov, A; Massol, N; Matricon, P; Maximov, D; Mazzanti, M; McCarthy, T; McPherson, R; Menke, S; Meyer, JP; Ming, Y; Monnier, E; Mooshofer, P; Neganov, A; Niedercorn, F; Nikolic-Audit, I; Nugent, IM; Oakham, G; Oberlack, H; Ocariz, J; Odier, J; Oram, CJ; Orlov, I; Orr, R; Parsons, JA; Peleganchuk, S; Penson, A; Perini, L; Perrodo, P; Perrot, G; Perus, A; Petit, E; Pisarev, I; Plamondon, M; Poffenberger, P; Poggioli, L; Pospelov, G; Pralavorio, P; Prast, J; Prudent, X; Przysiezniak, H; Puzo, P; Quentin, M; Radeka, V; Rajagopalan, S; Rauter, E; Reimann, O; Rescia, S; Resende, B; Richer, JP; Ridel, M; Rios, R; Roos, L; Rosenbaum, G; Rosenzweig, H; Rossetto, O; Roudil, W; Rousseau, D; Ruan, X; Rudert, A; Rusakovich, N; Rusquart, P; Rutherfoord, J; Sauvage, G; Savine, A; Schaarschmidt, J; Schacht, P; Schaffer, A; Schram, M; Schwemling, P; Seguin Moreau, N; Seifert, F; Serin, L; Seuster, R; Shalyugin, A; Shupe, M; Simion, S; Sinervo, P; Sippach, W; Skovpen, K; Sliwa, R; Soukharev, A; Spano, F; Stavina, P; Straessner, A; Strizenec, P; Stroynowski, R; Talyshev, A; Tapprogge, S; Tarrade, F; Tartarelli, GF; Teuscher, R; Tikhonov, Yu; Tocut, V; Tompkins, D; Thompson, P; Tisserant, S; Todorov, T; Tomasz, F; Trincaz-Duvoid, S; Trinh, Thi N; Trochet, S; Trocme, B; Tschann-Grimm, K; Tsionou, D; Ueno, R; Unal, G; Urbaniec, D; Usov, Y; Voss, K; Veillet, JJ; Vincter, M; Vogt, S; Weng, Z; Whalen, K; Wicek, F; Wilkens, H; Wingerter-Seez, I; Wulf, E; Yang, Z; Ye, J; Yuan, L; Yurkewicz, A; Zarzhitsky, P; Zerwas, D; Zhang, H; Zhang, L; Zhou, N; Zimmer, J; Zitoun, R; Zivkovic, L

    2010-01-01

    The ATLAS detector has been designed for operation at the Large Hadron Collider at CERN. ATLAS includes electromagnetic and hadronic liquid argon calorimeters, with almost 200,000 channels of data that must be sampled at the LHC bunch crossing frequency of 40 MHz. The calorimeter electronics calibration and readout are performed by custom electronics developed specifically for these purposes. This paper describes the system performance of the ATLAS liquid argon calibration and readout electronics, including noise, energy and time resolution, and long term stability, with data taken mainly from full-system calibration runs performed after installation of the system in the ATLAS detector hall at CERN.

  7. SIGNAL RECONSTRUCTION PERFORMANCE OF THE ATLAS HADRONIC TILE CALORIMETER

    CERN Document Server

    Do Amaral Coutinho, Y; The ATLAS collaboration

    2013-01-01

    "The Tile Calorimeter for the ATLAS experiment at the CERN Large Hadron Collider (LHC) is a sampling calorimeter with steel as absorber and scintillators as active medium. The scintillators are readout by wavelength shifting fibers coupled to photomultiplier tubes (PMT). The analogue signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal front-end electronics allows to read out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV. The read-out system is responsible for reconstructing the data in real-time fulfilling the tight time constraint imposed by the ATLAS first level trigger rate (100 kHz). The main component of the read-out system is the Digital Signal Processor (DSP) which, using an Optimal Filtering reconstruction algorithm, allows to compute for each channel the signal amplitude, time and quality factor at the required high rate. Currently the ATLAS detector and the LHC are undergoing an upgrade program tha...

  8. Performances of the ATLAS Level-1 Muon barrel trigger during the Run-II data taking

    CERN Document Server

    Sessa, Marco; The ATLAS collaboration

    2017-01-01

    The Level-1 Muon Barrel Trigger is one of the main elements of the event selection of the ATLAS experiment at the Large Hadron Collider. It exploits the Resistive Plate Chambers (RPC) detectors to generate the trigger signal. The RPCs are placed in the barrel region of the ATLAS experiment: they are arranged in three concentric double layers and operate in a strong magnetic toroidal field. RPC detectors cover the pseudo-rapidity range $|\\eta|<1.05$ for a total surface of more than $4000\\ m^2$ and about 3600 gas volumes. The Level-1 Muon Trigger in the barrel region allows to select muon candidates with respect to their transverse momentum and associates them with the correct bunch-crossing number. The trigger system is able to take a decision within a latency of about 2 $\\mu s$. The detailed measurement of the RPC detector efficiencies and of the trigger performance during the ATLAS Run-II data taking is here presented.

  9. Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1

    CERN Document Server

    Aad, Georges; Abdallah, Jalal; Abdinov, Ovsat; Aben, Rosemarie; Abolins, Maris; AbouZeid, Ossama; Abramowicz, Halina; Abreu, Henso; Abreu, Ricardo; Abulaiti, Yiming; Acharya, Bobby Samir; Adamczyk, Leszek; Adams, David; Adelman, Jahred; Adomeit, Stefanie; Adye, Tim; Affolder, Tony; Agatonovic-Jovin, Tatjana; Agricola, Johannes; Aguilar-Saavedra, Juan Antonio; Ahlen, Steven; Ahmadov, Faig; Aielli, Giulio; Akerstedt, Henrik; Åkesson, Torsten Paul Ake; Akimov, Andrei; Alberghi, Gian Luigi; Albert, Justin; Albrand, Solveig; Alconada Verzini, Maria Josefina; Aleksa, Martin; Aleksandrov, Igor; Alexa, Calin; Alexander, Gideon; Alexopoulos, Theodoros; Alhroob, Muhammad; Alimonti, Gianluca; Alio, Lion; Alison, John; Alkire, Steven Patrick; Allbrooke, Benedict; Allport, Phillip; Aloisio, Alberto; Alonso, Alejandro; Alonso, Francisco; Alpigiani, Cristiano; Altheimer, Andrew David; Alvarez Gonzalez, Barbara; Άlvarez Piqueras, Damián; Alviggi, Mariagrazia; Amadio, Brian Thomas; Amako, Katsuya; Amaral Coutinho, Yara; Amelung, Christoph; Amidei, Dante; Amor Dos Santos, Susana Patricia; Amorim, Antonio; Amoroso, Simone; Amram, Nir; Amundsen, Glenn; Anastopoulos, Christos; Ancu, Lucian Stefan; Andari, Nansi; Andeen, Timothy; Anders, Christoph Falk; Anders, Gabriel; Anders, John Kenneth; Anderson, Kelby; Andreazza, Attilio; Andrei, George Victor; Angelidakis, Stylianos; Angelozzi, Ivan; Anger, Philipp; Angerami, Aaron; Anghinolfi, Francis; Anisenkov, Alexey; Anjos, Nuno; Annovi, Alberto; Antonelli, Mario; Antonov, Alexey; Antos, Jaroslav; Anulli, Fabio; Aoki, Masato; Aperio Bella, Ludovica; Arabidze, Giorgi; Arai, Yasuo; Araque, Juan Pedro; Arce, Ayana; Arduh, Francisco Anuar; Arguin, Jean-Francois; Argyropoulos, Spyridon; Arik, Metin; Armbruster, Aaron James; Arnaez, Olivier; Arnold, Hannah; Arratia, Miguel; Arslan, Ozan; Artamonov, Andrei; Artoni, Giacomo; Artz, Sebastian; Asai, Shoji; Asbah, Nedaa; Ashkenazi, Adi; Åsman, Barbro; Asquith, Lily; Assamagan, Ketevi; Astalos, Robert; Atkinson, Markus; Atlay, Naim Bora; Augsten, Kamil; Aurousseau, Mathieu; Avolio, Giuseppe; Axen, Bradley; Ayoub, Mohamad Kassem; Azuelos, Georges; Baak, Max; Baas, Alessandra; Baca, Matthew John; Bacci, Cesare; Bachacou, Henri; Bachas, Konstantinos; Backes, Moritz; Backhaus, Malte; Bagiacchi, Paolo; Bagnaia, Paolo; Bai, Yu; Bain, Travis; Baines, John; Baker, Oliver Keith; Baldin, Evgenii; Balek, Petr; Balestri, Thomas; Balli, Fabrice; Balunas, William Keaton; Banas, Elzbieta; Banerjee, Swagato; Bannoura, Arwa A E; Barak, Liron; Barberio, Elisabetta Luigia; Barberis, Dario; Barbero, Marlon; Barillari, Teresa; Barisonzi, Marcello; Barklow, Timothy; Barlow, Nick; Barnes, Sarah Louise; Barnett, Bruce; Barnett, Michael; Barnovska, Zuzana; Baroncelli, Antonio; Barone, Gaetano; Barr, Alan; Barreiro, Fernando; Barreiro Guimarães da Costa, João; Bartoldus, Rainer; Barton, Adam Edward; Bartos, Pavol; Basalaev, Artem; Bassalat, Ahmed; Basye, Austin; Bates, Richard; Batista, Santiago Juan; Batley, Richard; Battaglia, Marco; Bauce, Matteo; Bauer, Florian; Bawa, Harinder Singh; Beacham, James Baker; Beattie, Michael David; Beau, Tristan; Beauchemin, Pierre-Hugues; Beccherle, Roberto; Bechtle, Philip; Beck, Hans~Peter; Becker, Kathrin; Becker, Maurice; Beckingham, Matthew; Becot, Cyril; Beddall, Andrew; Beddall, Ayda; Bednyakov, Vadim; Bee, Christopher; Beemster, Lars; Beermann, Thomas; Begel, Michael; Behr, Janna Katharina; Belanger-Champagne, Camille; Bell, William; Bella, Gideon; Bellagamba, Lorenzo; Bellerive, Alain; Bellomo, Massimiliano; Belotskiy, Konstantin; Beltramello, Olga; Benary, Odette; Benchekroun, Driss; Bender, Michael; Bendtz, Katarina; Benekos, Nektarios; Benhammou, Yan; Benhar Noccioli, Eleonora; Benitez Garcia, Jorge-Armando; Benjamin, Douglas; Bensinger, James; Bentvelsen, Stan; Beresford, Lydia; Beretta, Matteo; Berge, David; Bergeaas Kuutmann, Elin; Berger, Nicolas; Berghaus, Frank; Beringer, Jürg; Bernard, Clare; Bernard, Nathan Rogers; Bernius, Catrin; Bernlochner, Florian Urs; Berry, Tracey; Berta, Peter; Bertella, Claudia; Bertoli, Gabriele; Bertolucci, Federico; Bertsche, Carolyn; Bertsche, David; Besana, Maria Ilaria; Besjes, Geert-Jan; Bessidskaia Bylund, Olga; Bessner, Martin Florian; Besson, Nathalie; Betancourt, Christopher; Bethke, Siegfried; Bevan, Adrian John; Bhimji, Wahid; Bianchi, Riccardo-Maria; Bianchini, Louis; Bianco, Michele; Biebel, Otmar; Biedermann, Dustin; Biesuz, Nicolo Vladi; Biglietti, Michela; Bilbao De Mendizabal, Javier; Bilokon, Halina; Bindi, Marcello; Binet, Sebastien; Bingul, Ahmet; Bini, Cesare; Biondi, Silvia; Bjergaard, David Martin; Black, Curtis; Black, James; Black, Kevin; Blackburn, Daniel; Blair, Robert; Blanchard, Jean-Baptiste; Blanco, Jacobo Ezequiel; Blazek, Tomas; Bloch, Ingo; Blocker, Craig; Blum, Walter; Blumenschein, Ulrike; Blunier, Sylvain; Bobbink, Gerjan; Bobrovnikov, Victor; Bocchetta, Simona Serena; Bocci, Andrea; Bock, Christopher; Boehler, Michael; Bogaerts, Joannes Andreas; Bogavac, Danijela; Bogdanchikov, Alexander; Bohm, Christian; Boisvert, Veronique; Bold, Tomasz; Boldea, Venera; Boldyrev, Alexey; Bomben, Marco; Bona, Marcella; Boonekamp, Maarten; Borisov, Anatoly; Borissov, Guennadi; Borroni, Sara; Bortfeldt, Jonathan; Bortolotto, Valerio; Bos, Kors; Boscherini, Davide; Bosman, Martine; Boudreau, Joseph; Bouffard, Julian; Bouhova-Thacker, Evelina Vassileva; Boumediene, Djamel Eddine; Bourdarios, Claire; Bousson, Nicolas; Boutle, Sarah Kate; Boveia, Antonio; Boyd, James; Boyko, Igor; Bozic, Ivan; Bracinik, Juraj; Brandt, Andrew; Brandt, Gerhard; Brandt, Oleg; Bratzler, Uwe; Brau, Benjamin; Brau, James; Braun, Helmut; Breaden Madden, William Dmitri; Brendlinger, Kurt; Brennan, Amelia Jean; Brenner, Lydia; Brenner, Richard; Bressler, Shikma; Bristow, Timothy Michael; Britton, Dave; Britzger, Daniel; Brochu, Frederic; Brock, Ian; Brock, Raymond; Bronner, Johanna; Brooijmans, Gustaaf; Brooks, Timothy; Brooks, William; Brosamer, Jacquelyn; Brost, Elizabeth; Bruckman de Renstrom, Pawel; Bruncko, Dusan; Bruneliere, Renaud; Bruni, Alessia; Bruni, Graziano; Bruschi, Marco; Bruscino, Nello; Bryngemark, Lene; Buanes, Trygve; Buat, Quentin; Buchholz, Peter; Buckley, Andrew; Budagov, Ioulian; Buehrer, Felix; Bugge, Lars; Bugge, Magnar Kopangen; Bulekov, Oleg; Bullock, Daniel; Burckhart, Helfried; Burdin, Sergey; Burgard, Carsten Daniel; Burghgrave, Blake; Burke, Stephen; Burmeister, Ingo; Busato, Emmanuel; Büscher, Daniel; Büscher, Volker; Bussey, Peter; Butler, John; Butt, Aatif Imtiaz; Buttar, Craig; Butterworth, Jonathan; Butti, Pierfrancesco; Buttinger, William; Buzatu, Adrian; Buzykaev, Aleksey; Cabrera Urbán, Susana; Caforio, Davide; Cairo, Valentina; Cakir, Orhan; Calace, Noemi; Calafiura, Paolo; Calandri, Alessandro; Calderini, Giovanni; Calfayan, Philippe; Caloba, Luiz; Calvet, David; Calvet, Samuel; Camacho Toro, Reina; Camarda, Stefano; Camarri, Paolo; Cameron, David; Caminal Armadans, Roger; Campana, Simone; Campanelli, Mario; Campoverde, Angel; Canale, Vincenzo; Canepa, Anadi; Cano Bret, Marc; Cantero, Josu; Cantrill, Robert; Cao, Tingting; Capeans Garrido, Maria Del Mar; Caprini, Irinel; Caprini, Mihai; Capua, Marcella; Caputo, Regina; Carbone, Ryne Michael; Cardarelli, Roberto; Cardillo, Fabio; Carli, Tancredi; Carlino, Gianpaolo; Carminati, Leonardo; Caron, Sascha; Carquin, Edson; Carrillo-Montoya, German D; Carter, Janet; Carvalho, João; Casadei, Diego; Casado, Maria Pilar; Casolino, Mirkoantonio; Casper, David William; Castaneda-Miranda, Elizabeth; Castelli, Angelantonio; Castillo Gimenez, Victoria; Castro, Nuno Filipe; Catastini, Pierluigi; Catinaccio, Andrea; Catmore, James; Cattai, Ariella; Caudron, Julien; Cavaliere, Viviana; Cavalli, Donatella; Cavalli-Sforza, Matteo; Cavasinni, Vincenzo; Ceradini, Filippo; Cerda Alberich, Leonor; Cerio, Benjamin; Cerny, Karel; Cerqueira, Augusto Santiago; Cerri, Alessandro; Cerrito, Lucio; Cerutti, Fabio; Cerv, Matevz; Cervelli, Alberto; Cetin, Serkant Ali; Chafaq, Aziz; Chakraborty, Dhiman; Chalupkova, Ina; Chan, Yat Long; Chang, Philip; Chapman, John Derek; Charlton, Dave; Chau, Chav Chhiv; Chavez Barajas, Carlos Alberto; Che, Siinn; Cheatham, Susan; Chegwidden, Andrew; Chekanov, Sergei; Chekulaev, Sergey; Chelkov, Gueorgui; Chelstowska, Magda Anna; Chen, Chunhui; Chen, Hucheng; Chen, Karen; Chen, Liming; Chen, Shenjian; Chen, Shion; Chen, Xin; Chen, Ye; Cheng, Hok Chuen; Cheng, Yangyang; Cheplakov, Alexander; Cheremushkina, Evgenia; Cherkaoui El Moursli, Rajaa; Chernyatin, Valeriy; Cheu, Elliott; Chevalier, Laurent; Chiarella, Vitaliano; Chiarelli, Giorgio; Chiodini, Gabriele; Chisholm, Andrew; Chislett, Rebecca Thalatta; Chitan, Adrian; Chizhov, Mihail; Choi, Kyungeon; Chouridou, Sofia; Chow, Bonnie Kar Bo; Christodoulou, Valentinos; Chromek-Burckhart, Doris; Chudoba, Jiri; Chuinard, Annabelle Julia; Chwastowski, Janusz; Chytka, Ladislav; Ciapetti, Guido; Ciftci, Abbas Kenan; Cinca, Diane; Cindro, Vladimir; Cioara, Irina Antonela; Ciocio, Alessandra; Cirotto, Francesco; Citron, Zvi Hirsh; Ciubancan, Mihai; Clark, Allan G; Clark, Brian Lee; Clark, Philip James; Clarke, Robert; Clement, Christophe; Coadou, Yann; Cobal, Marina; Coccaro, Andrea; Cochran, James H; Coffey, Laurel; Cogan, Joshua Godfrey; Colasurdo, Luca; Cole, Brian; Cole, Stephen; Colijn, Auke-Pieter; Collot, Johann; Colombo, Tommaso; Compostella, Gabriele; Conde Muiño, Patricia; Coniavitis, Elias; Connell, Simon Henry; Connelly, Ian; Consorti, Valerio; Constantinescu, Serban; Conta, Claudio; Conti, Geraldine; Conventi, Francesco; Cooke, Mark; Cooper, Ben; Cooper-Sarkar, Amanda; Cornelissen, Thijs; Corradi, Massimo; Corriveau, Francois; Corso-Radu, Alina; Cortes-Gonzalez, Arely; Cortiana, Giorgio; Costa, Giuseppe; Costa, María José; Costanzo, Davide; Côté, David; Cottin, Giovanna; Cowan, Glen; Cox, Brian; Cranmer, Kyle; Cree, Graham; Crépé-Renaudin, Sabine; Crescioli, Francesco; Cribbs, Wayne Allen; Crispin Ortuzar, Mireia; Cristinziani, Markus; Croft, Vince; Crosetti, Giovanni; Cuhadar Donszelmann, Tulay; Cummings, Jane; Curatolo, Maria; Cúth, Jakub; Cuthbert, Cameron; Czirr, Hendrik; Czodrowski, Patrick; D'Auria, Saverio; D'Onofrio, Monica; Da Cunha Sargedas De Sousa, Mario Jose; Da Via, Cinzia; Dabrowski, Wladyslaw; Dafinca, Alexandru; Dai, Tiesheng; Dale, Orjan; Dallaire, Frederick; Dallapiccola, Carlo; Dam, Mogens; Dandoy, Jeffrey Rogers; Dang, Nguyen Phuong; Daniells, Andrew Christopher; Danninger, Matthias; Dano Hoffmann, Maria; Dao, Valerio; Darbo, Giovanni; Darmora, Smita; Dassoulas, James; Dattagupta, Aparajita; Davey, Will; David, Claire; Davidek, Tomas; Davies, Eleanor; Davies, Merlin; Davison, Peter; Davygora, Yuriy; Dawe, Edmund; Dawson, Ian; Daya-Ishmukhametova, Rozmin; De, Kaushik; de Asmundis, Riccardo; De Benedetti, Abraham; De Castro, Stefano; De Cecco, Sandro; De Groot, Nicolo; de Jong, Paul; De la Torre, Hector; De Lorenzi, Francesco; De Pedis, Daniele; De Salvo, Alessandro; De Sanctis, Umberto; De Santo, Antonella; De Vivie De Regie, Jean-Baptiste; Dearnaley, William James; Debbe, Ramiro; Debenedetti, Chiara; Dedovich, Dmitri; Deigaard, Ingrid; Del Peso, Jose; Del Prete, Tarcisio; Delgove, David; Deliot, Frederic; Delitzsch, Chris Malena; Deliyergiyev, Maksym; Dell'Acqua, Andrea; Dell'Asta, Lidia; Dell'Orso, Mauro; Della Pietra, Massimo; della Volpe, Domenico; Delmastro, Marco; Delsart, Pierre-Antoine; Deluca, Carolina; DeMarco, David; Demers, Sarah; Demichev, Mikhail; Demilly, Aurelien; Denisov, Sergey; Derendarz, Dominik; Derkaoui, Jamal Eddine; Derue, Frederic; Dervan, Paul; Desch, Klaus Kurt; Deterre, Cecile; Dette, Karola; Deviveiros, Pier-Olivier; Dewhurst, Alastair; Dhaliwal, Saminder; Di Ciaccio, Anna; Di Ciaccio, Lucia; Di Domenico, Antonio; Di Donato, Camilla; Di Girolamo, Alessandro; Di Girolamo, Beniamino; Di Mattia, Alessandro; Di Micco, Biagio; Di Nardo, Roberto; Di Simone, Andrea; Di Sipio, Riccardo; Di Valentino, David; Diaconu, Cristinel; Diamond, Miriam; Dias, Flavia; Diaz, Marco Aurelio; Diehl, Edward; Dietrich, Janet; Diglio, Sara; Dimitrievska, Aleksandra; Dingfelder, Jochen; Dita, Petre; Dita, Sanda; Dittus, Fridolin; Djama, Fares; Djobava, Tamar; Djuvsland, Julia Isabell; do Vale, Maria Aline Barros; Dobos, Daniel; Dobre, Monica; Doglioni, Caterina; Dohmae, Takeshi; Dolejsi, Jiri; Dolezal, Zdenek; Dolgoshein, Boris; Donadelli, Marisilvia; Donati, Simone; Dondero, Paolo; Donini, Julien; Dopke, Jens; Doria, Alessandra; Dova, Maria-Teresa; Doyle, Tony; Drechsler, Eric; Dris, Manolis; Du, Yanyan; Dubreuil, Emmanuelle; Duchovni, Ehud; Duckeck, Guenter; Ducu, Otilia Anamaria; Duda, Dominik; Dudarev, Alexey; Duflot, Laurent; Duguid, Liam; Dührssen, Michael; Dunford, Monica; Duran Yildiz, Hatice; Düren, Michael; Durglishvili, Archil; Duschinger, Dirk; Dutta, Baishali; Dyndal, Mateusz; Eckardt, Christoph; Ecker, Katharina Maria; Edgar, Ryan Christopher; Edson, William; Edwards, Nicholas Charles; Ehrenfeld, Wolfgang; Eifert, Till; Eigen, Gerald; Einsweiler, Kevin; Ekelof, Tord; El Kacimi, Mohamed; Ellert, Mattias; Elles, Sabine; Ellinghaus, Frank; Elliot, Alison; Ellis, Nicolas; Elmsheuser, Johannes; Elsing, Markus; Emeliyanov, Dmitry; Enari, Yuji; Endner, Oliver Chris; Endo, Masaki; Erdmann, Johannes; Ereditato, Antonio; Ernis, Gunar; Ernst, Jesse; Ernst, Michael; Errede, Steven; Ertel, Eugen; Escalier, Marc; Esch, Hendrik; Escobar, Carlos; Esposito, Bellisario; Etienvre, Anne-Isabelle; Etzion, Erez; Evans, Hal; Ezhilov, Alexey; Fabbri, Laura; Facini, Gabriel; Fakhrutdinov, Rinat; Falciano, Speranza; Falla, Rebecca Jane; Faltova, Jana; Fang, Yaquan; Fanti, Marcello; Farbin, Amir; Farilla, Addolorata; Farooque, Trisha; Farrell, Steven; Farrington, Sinead; Farthouat, Philippe; Fassi, Farida; Fassnacht, Patrick; Fassouliotis, Dimitrios; Faucci Giannelli, Michele; Favareto, Andrea; Fayard, Louis; Fedin, Oleg; Fedorko, Wojciech; Feigl, Simon; Feligioni, Lorenzo; Feng, Cunfeng; Feng, Eric; Feng, Haolu; Fenyuk, Alexander; Feremenga, Last; Fernandez Martinez, Patricia; Fernandez Perez, Sonia; Ferrando, James; Ferrari, Arnaud; Ferrari, Pamela; Ferrari, Roberto; Ferreira de Lima, Danilo Enoque; Ferrer, Antonio; Ferrere, Didier; Ferretti, Claudio; Ferretto Parodi, Andrea; Fiascaris, Maria; Fiedler, Frank; Filipčič, Andrej; Filipuzzi, Marco; Filthaut, Frank; Fincke-Keeler, Margret; Finelli, Kevin Daniel; Fiolhais, Miguel; Fiorini, Luca; Firan, Ana; Fischer, Adam; Fischer, Cora; Fischer, Julia; Fisher, Wade Cameron; Flaschel, Nils; Fleck, Ivor; Fleischmann, Philipp; Fletcher, Gareth Thomas; Fletcher, Gregory; Fletcher, Rob Roy MacGregor; Flick, Tobias; Floderus, Anders; Flores Castillo, Luis; Flowerdew, Michael; Formica, Andrea; Forti, Alessandra; Fournier, Daniel; Fox, Harald; Fracchia, Silvia; Francavilla, Paolo; Franchini, Matteo; Francis, David; Franconi, Laura; Franklin, Melissa; Frate, Meghan; Fraternali, Marco; Freeborn, David; French, Sky; Fressard-Batraneanu, Silvia; Friedrich, Felix; Froidevaux, Daniel; Frost, James; Fukunaga, Chikara; Fullana Torregrosa, Esteban; Fulsom, Bryan Gregory; Fusayasu, Takahiro; Fuster, Juan; Gabaldon, Carolina; Gabizon, Ofir; Gabrielli, Alessandro; Gabrielli, Andrea; Gach, Grzegorz; Gadatsch, Stefan; Gadomski, Szymon; Gagliardi, Guido; Gagnon, Pauline; Galea, Cristina; Galhardo, Bruno; Gallas, Elizabeth; Gallop, Bruce; Gallus, Petr; Galster, Gorm Aske Gram Krohn; Gan, KK; Gao, Jun; Gao, Yanyan; Gao, Yongsheng; Garay Walls, Francisca; Garberson, Ford; García, Carmen; García Navarro, José Enrique; Garcia-Sciveres, Maurice; Gardner, Robert; Garelli, Nicoletta; Garonne, Vincent; Gatti, Claudio; Gaudiello, Andrea; Gaudio, Gabriella; Gaur, Bakul; Gauthier, Lea; Gauzzi, Paolo; Gavrilenko, Igor; Gay, Colin; Gaycken, Goetz; Gazis, Evangelos; Ge, Peng; Gecse, Zoltan; Gee, Norman; Geich-Gimbel, Christoph; Geisler, Manuel Patrice; Gemme, Claudia; Genest, Marie-Hélène; Geng, Cong; Gentile, Simonetta; George, Matthias; George, Simon; Gerbaudo, Davide; Gershon, Avi; Ghasemi, Sara; Ghazlane, Hamid; Giacobbe, Benedetto; Giagu, Stefano; Giangiobbe, Vincent; Giannetti, Paola; Gibbard, Bruce; Gibson, Stephen; Gignac, Matthew; Gilchriese, Murdock; Gillam, Thomas; Gillberg, Dag; Gilles, Geoffrey; Gingrich, Douglas; Giokaris, Nikos; Giordani, MarioPaolo; Giorgi, Filippo Maria; Giorgi, Francesco Michelangelo; Giraud, Pierre-Francois; Giromini, Paolo; Giugni, Danilo; Giuliani, Claudia; Giulini, Maddalena; Gjelsten, Børge Kile; Gkaitatzis, Stamatios; Gkialas, Ioannis; Gkougkousis, Evangelos Leonidas; Gladilin, Leonid; Glasman, Claudia; Glatzer, Julian; Glaysher, Paul; Glazov, Alexandre; Goblirsch-Kolb, Maximilian; Goddard, Jack Robert; Godlewski, Jan; Goldfarb, Steven; Golling, Tobias; Golubkov, Dmitry; Gomes, Agostinho; Gonçalo, Ricardo; Goncalves Pinto Firmino Da Costa, Joao; Gonella, Laura; González de la Hoz, Santiago; Gonzalez Parra, Garoe; Gonzalez-Sevilla, Sergio; Goossens, Luc; Gorbounov, Petr Andreevich; Gordon, Howard; Gorelov, Igor; Gorini, Benedetto; Gorini, Edoardo; Gorišek, Andrej; Gornicki, Edward; Goshaw, Alfred; Gössling, Claus; Gostkin, Mikhail Ivanovitch; Goujdami, Driss; Goussiou, Anna; Govender, Nicolin; Gozani, Eitan; Grabas, Herve Marie Xavier; Graber, Lars; Grabowska-Bold, Iwona; Gradin, Per Olov Joakim; Grafström, Per; Gramling, Johanna; Gramstad, Eirik; Grancagnolo, Sergio; Gratchev, Vadim; Gray, Heather; Graziani, Enrico; Greenwood, Zeno Dixon; Grefe, Christian; Gregersen, Kristian; Gregor, Ingrid-Maria; Grenier, Philippe; Griffiths, Justin; Grillo, Alexander; Grimm, Kathryn; Grinstein, Sebastian; Gris, Philippe Luc Yves; Grivaz, Jean-Francois; Groh, Sabrina; Grohs, Johannes Philipp; Grohsjean, Alexander; Gross, Eilam; Grosse-Knetter, Joern; Grossi, Giulio Cornelio; Grout, Zara Jane; Guan, Liang; Guenther, Jaroslav; Guescini, Francesco; Guest, Daniel; Gueta, Orel; Guido, Elisa; Guillemin, Thibault; Guindon, Stefan; Gul, Umar; Gumpert, Christian; Guo, Jun; Guo, Yicheng; Gupta, Shaun; Gustavino, Giuliano; Gutierrez, Phillip; Gutierrez Ortiz, Nicolas Gilberto; Gutschow, Christian; Guyot, Claude; Gwenlan, Claire; Gwilliam, Carl; Haas, Andy; Haber, Carl; Hadavand, Haleh Khani; Haddad, Nacim; Haefner, Petra; Hageböck, Stephan; Hajduk, Zbigniew; Hakobyan, Hrachya; Haleem, Mahsana; Haley, Joseph; Hall, David; Halladjian, Garabed; Hallewell, Gregory David; Hamacher, Klaus; Hamal, Petr; Hamano, Kenji; Hamilton, Andrew; Hamity, Guillermo Nicolas; Hamnett, Phillip George; Han, Liang; Hanagaki, Kazunori; Hanawa, Keita; Hance, Michael; Haney, Bijan; Hanke, Paul; Hanna, Remie; Hansen, Jørgen Beck; Hansen, Jorn Dines; Hansen, Maike Christina; Hansen, Peter Henrik; Hara, Kazuhiko; Hard, Andrew; Harenberg, Torsten; Hariri, Faten; Harkusha, Siarhei; Harrington, Robert; Harrison, Paul Fraser; Hartjes, Fred; Hasegawa, Makoto; Hasegawa, Yoji; Hasib, A; Hassani, Samira; Haug, Sigve; Hauser, Reiner; Hauswald, Lorenz; Havranek, Miroslav; Hawkes, Christopher; Hawkings, Richard John; Hawkins, Anthony David; Hayashi, Takayasu; Hayden, Daniel; Hays, Chris; Hays, Jonathan Michael; Hayward, Helen; Haywood, Stephen; Head, Simon; Heck, Tobias; Hedberg, Vincent; Heelan, Louise; Heim, Sarah; Heim, Timon; Heinemann, Beate; Heinrich, Lukas; Hejbal, Jiri; Helary, Louis; Hellman, Sten; Helsens, Clement; Henderson, James; Henderson, Robert; Heng, Yang; Hengler, Christopher; Henkelmann, Steffen; Henrichs, Anna; Henriques Correia, Ana Maria; Henrot-Versille, Sophie; Herbert, Geoffrey Henry; Hernández Jiménez, Yesenia; Herten, Gregor; Hertenberger, Ralf; Hervas, Luis; Hesketh, Gavin Grant; Hessey, Nigel; Hetherly, Jeffrey Wayne; Hickling, Robert; Higón-Rodriguez, Emilio; Hill, Ewan; Hill, John; Hiller, Karl Heinz; Hillier, Stephen; Hinchliffe, Ian; Hines, Elizabeth; Hinman, Rachel Reisner; Hirose, Minoru; Hirschbuehl, Dominic; Hobbs, John; Hod, Noam; Hodgkinson, Mark; Hodgson, Paul; Hoecker, Andreas; Hoeferkamp, Martin; Hoenig, Friedrich; Hohlfeld, Marc; Hohn, David; Holmes, Tova Ray; Homann, Michael; Hong, Tae Min; Hopkins, Walter; Horii, Yasuyuki; Horton, Arthur James; Hostachy, Jean-Yves; Hou, Suen; Hoummada, Abdeslam; Howard, Jacob; Howarth, James; Hrabovsky, Miroslav; Hristova, Ivana; Hrivnac, Julius; Hryn'ova, Tetiana; Hrynevich, Aliaksei; Hsu, Catherine; Hsu, Pai-hsien Jennifer; Hsu, Shih-Chieh; Hu, Diedi; Hu, Qipeng; Hu, Xueye; Huang, Yanping; Hubacek, Zdenek; Hubaut, Fabrice; Huegging, Fabian; Huffman, Todd Brian; Hughes, Emlyn; Hughes, Gareth; Huhtinen, Mika; Hülsing, Tobias Alexander; Huseynov, Nazim; Huston, Joey; Huth, John; Iacobucci, Giuseppe; Iakovidis, Georgios; Ibragimov, Iskander; Iconomidou-Fayard, Lydia; Ideal, Emma; Idrissi, Zineb; Iengo, Paolo; Igonkina, Olga; Iizawa, Tomoya; Ikegami, Yoichi; Ikeno, Masahiro; Ilchenko, Iurii; Iliadis, Dimitrios; Ilic, Nikolina; Ince, Tayfun; Introzzi, Gianluca; Ioannou, Pavlos; Iodice, Mauro; Iordanidou, Kalliopi; Ippolito, Valerio; Irles Quiles, Adrian; Isaksson, Charlie; Ishino, Masaya; Ishitsuka, Masaki; Ishmukhametov, Renat; Issever, Cigdem; Istin, Serhat; Iturbe Ponce, Julia Mariana; Iuppa, Roberto; Ivarsson, Jenny; Iwanski, Wieslaw; Iwasaki, Hiroyuki; Izen, Joseph; Izzo, Vincenzo; Jabbar, Samina; Jackson, Brett; Jackson, Matthew; Jackson, Paul; Jaekel, Martin; Jain, Vivek; Jakobi, Katharina Bianca; Jakobs, Karl; Jakobsen, Sune; Jakoubek, Tomas; Jakubek, Jan; Jamin, David Olivier; Jana, Dilip; Jansen, Eric; Jansky, Roland; Janssen, Jens; Janus, Michel; Jarlskog, Göran; Javadov, Namig; Javůrek, Tomáš; Jeanty, Laura; Jejelava, Juansher; Jeng, Geng-yuan; Jennens, David; Jenni, Peter; Jentzsch, Jennifer; Jeske, Carl; Jézéquel, Stéphane; Ji, Haoshuang; Jia, Jiangyong; Jiang, Hai; Jiang, Yi; Jiggins, Stephen; Jimenez Pena, Javier; Jin, Shan; Jinaru, Adam; Jinnouchi, Osamu; Joergensen, Morten Dam; Johansson, Per; Johns, Kenneth; Johnson, William Joseph; Jon-And, Kerstin; Jones, Graham; Jones, Roger; Jones, Tim; Jongmanns, Jan; Jorge, Pedro; Joshi, Kiran Daniel; Jovicevic, Jelena; Ju, Xiangyang; Juste Rozas, Aurelio; Kaci, Mohammed; Kaczmarska, Anna; Kado, Marumi; Kagan, Harris; Kagan, Michael; Kahn, Sebastien Jonathan; Kajomovitz, Enrique; Kalderon, Charles William; Kaluza, Adam; Kama, Sami; Kamenshchikov, Andrey; Kanaya, Naoko; Kaneti, Steven; Kantserov, Vadim; Kanzaki, Junichi; Kaplan, Benjamin; Kaplan, Laser Seymour; Kapliy, Anton; Kar, Deepak; Karakostas, Konstantinos; Karamaoun, Andrew; Karastathis, Nikolaos; Kareem, Mohammad Jawad; Karentzos, Efstathios; Karnevskiy, Mikhail; Karpov, Sergey; Karpova, Zoya; Karthik, Krishnaiyengar; Kartvelishvili, Vakhtang; Karyukhin, Andrey; Kasahara, Kota; Kashif, Lashkar; Kass, Richard; Kastanas, Alex; Kataoka, Yousuke; Kato, Chikuma; Katre, Akshay; Katzy, Judith; Kawade, Kentaro; Kawagoe, Kiyotomo; Kawamoto, Tatsuo; Kawamura, Gen; Kazama, Shingo; Kazanin, Vassili; Keeler, Richard; Kehoe, Robert; Keller, John; Kempster, Jacob Julian; Keoshkerian, Houry; Kepka, Oldrich; Kerševan, Borut Paul; Kersten, Susanne; Keyes, Robert; Khalil-zada, Farkhad; Khandanyan, Hovhannes; Khanov, Alexander; Kharlamov, Alexey; Khoo, Teng Jian; Khovanskiy, Valery; Khramov, Evgeniy; Khubua, Jemal; Kido, Shogo; Kim, Hee Yeun; Kim, Shinhong; Kim, Young-Kee; Kimura, Naoki; Kind, Oliver Maria; King, Barry; King, Matthew; King, Samuel Burton; Kirk, Julie; Kiryunin, Andrey; Kishimoto, Tomoe; Kisielewska, Danuta; Kiss, Florian; Kiuchi, Kenji; Kivernyk, Oleh; Kladiva, Eduard; Klein, Matthew Henry; Klein, Max; Klein, Uta; Kleinknecht, Konrad; Klimek, Pawel; Klimentov, Alexei; Klingenberg, Reiner; Klinger, Joel Alexander; Klioutchnikova, Tatiana; Kluge, Eike-Erik; Kluit, Peter; Kluth, Stefan; Knapik, Joanna; Kneringer, Emmerich; Knoops, Edith; Knue, Andrea; Kobayashi, Aine; Kobayashi, Dai; Kobayashi, Tomio; Kobel, Michael; Kocian, Martin; Kodys, Peter; Koffas, Thomas; Koffeman, Els; Kogan, Lucy Anne; Kohlmann, Simon; Kohout, Zdenek; Kohriki, Takashi; Koi, Tatsumi; Kolanoski, Hermann; Kolb, Mathis; Koletsou, Iro; Komar, Aston; Komori, Yuto; Kondo, Takahiko; Kondrashova, Nataliia; Köneke, Karsten; König, Adriaan; Kono, Takanori; Konoplich, Rostislav; Konstantinidis, Nikolaos; Kopeliansky, Revital; Koperny, Stefan; Köpke, Lutz; Kopp, Anna Katharina; Korcyl, Krzysztof; Kordas, Kostantinos; Korn, Andreas; Korol, Aleksandr; Korolkov, Ilya; Korolkova, Elena; Kortner, Oliver; Kortner, Sandra; Kosek, Tomas; Kostyukhin, Vadim; Kotov, Vladislav; Kotwal, Ashutosh; Kourkoumeli-Charalampidi, Athina; Kourkoumelis, Christine; Kouskoura, Vasiliki; Koutsman, Alex; Kowalewski, Robert Victor; Kowalski, Tadeusz; Kozanecki, Witold; Kozhin, Anatoly; Kramarenko, Viktor; Kramberger, Gregor; Krasnopevtsev, Dimitriy; Krasny, Mieczyslaw Witold; Krasznahorkay, Attila; Kraus, Jana; Kravchenko, Anton; Kreiss, Sven; Kretz, Moritz; Kretzschmar, Jan; Kreutzfeldt, Kristof; Krieger, Peter; Krizka, Karol; Kroeninger, Kevin; Kroha, Hubert; Kroll, Joe; Kroseberg, Juergen; Krstic, Jelena; Kruchonak, Uladzimir; Krüger, Hans; Krumnack, Nils; Kruse, Amanda; Kruse, Mark; Kruskal, Michael; Kubota, Takashi; Kucuk, Hilal; Kuday, Sinan; Kuehn, Susanne; Kugel, Andreas; Kuger, Fabian; Kuhl, Andrew; Kuhl, Thorsten; Kukhtin, Victor; Kukla, Romain; Kulchitsky, Yuri; Kuleshov, Sergey; Kuna, Marine; Kunigo, Takuto; Kupco, Alexander; Kurashige, Hisaya; Kurochkin, Yurii; Kus, Vlastimil; Kuwertz, Emma Sian; Kuze, Masahiro; Kvita, Jiri; Kwan, Tony; Kyriazopoulos, Dimitrios; La Rosa, Alessandro; La Rosa Navarro, Jose Luis; La Rotonda, Laura; Lacasta, Carlos; Lacava, Francesco; Lacey, James; Lacker, Heiko; Lacour, Didier; Lacuesta, Vicente Ramón; Ladygin, Evgueni; Lafaye, Remi; Laforge, Bertrand; Lagouri, Theodota; Lai, Stanley; Lambourne, Luke; Lammers, Sabine; Lampen, Caleb; Lampl, Walter; Lançon, Eric; Landgraf, Ulrich; Landon, Murrough; Lang, Valerie Susanne; Lange, J örn Christian; Lankford, Andrew; Lanni, Francesco; Lantzsch, Kerstin; Lanza, Agostino; Laplace, Sandrine; Lapoire, Cecile; Laporte, Jean-Francois; Lari, Tommaso; Lasagni Manghi, Federico; Lassnig, Mario; Laurelli, Paolo; Lavrijsen, Wim; Law, Alexander; Laycock, Paul; Lazovich, Tomo; Le Dortz, Olivier; Le Guirriec, Emmanuel; Le Menedeu, Eve; LeBlanc, Matthew Edgar; LeCompte, Thomas; Ledroit-Guillon, Fabienne Agnes Marie; Lee, Claire Alexandra; Lee, Shih-Chang; Lee, Lawrence; Lefebvre, Guillaume; Lefebvre, Michel; Legger, Federica; Leggett, Charles; Lehan, Allan; Lehmann Miotto, Giovanna; Lei, Xiaowen; Leight, William Axel; Leisos, Antonios; Leister, Andrew Gerard; Leite, Marco Aurelio Lisboa; Leitner, Rupert; Lellouch, Daniel; Lemmer, Boris; Leney, Katharine; Lenz, Tatjana; Lenzi, Bruno; Leone, Robert; Leone, Sandra; Leonidopoulos, Christos; Leontsinis, Stefanos; Leroy, Claude; Lester, Christopher; Levchenko, Mikhail; Levêque, Jessica; Levin, Daniel; Levinson, Lorne; Levy, Mark; Lewis, Adrian; Leyko, Agnieszka; Leyton, Michael; Li, Bing; Li, Haifeng; Li, Ho Ling; Li, Lei; Li, Liang; Li, Shu; Li, Xingguo; Li, Yichen; Liang, Zhijun; Liao, Hongbo; Liberti, Barbara; Liblong, Aaron; Lichard, Peter; Lie, Ki; Liebal, Jessica; Liebig, Wolfgang; Limbach, Christian; Limosani, Antonio; Lin, Simon; Lin, Tai-Hua; Linde, Frank; Lindquist, Brian Edward; Linnemann, James; Lipeles, Elliot; Lipniacka, Anna; Lisovyi, Mykhailo; Liss, Tony; Lissauer, David; Lister, Alison; Litke, Alan; Liu, Bo; Liu, Dong; Liu, Hao; Liu, Jian; Liu, Jianbei; Liu, Kun; Liu, Lulu; Liu, Miaoyuan; Liu, Minghui; Liu, Yanwen; Livan, Michele; Lleres, Annick; Llorente Merino, Javier; Lloyd, Stephen; Lo Sterzo, Francesco; Lobodzinska, Ewelina; Loch, Peter; Lockman, William; Loebinger, Fred; Loevschall-Jensen, Ask Emil; Loew, Kevin Michael; Loginov, Andrey; Lohse, Thomas; Lohwasser, Kristin; Lokajicek, Milos; Long, Brian Alexander; Long, Jonathan David; Long, Robin Eamonn; Looper, Kristina Anne; Lopes, Lourenco; Lopez Mateos, David; Lopez Paredes, Brais; Lopez Paz, Ivan; Lorenz, Jeanette; Lorenzo Martinez, Narei; Losada, Marta; Lösel, Philipp Jonathan; Lou, XinChou; Lounis, Abdenour; Love, Jeremy; Love, Peter; Lu, Haonan; Lu, Nan; Lubatti, Henry; Luci, Claudio; Lucotte, Arnaud; Luedtke, Christian; Luehring, Frederick; Lukas, Wolfgang; Luminari, Lamberto; Lundberg, Olof; Lund-Jensen, Bengt; Lynn, David; Lysak, Roman; Lytken, Else; Ma, Hong; Ma, Lian Liang; Maccarrone, Giovanni; Macchiolo, Anna; Macdonald, Calum Michael; Maček, Boštjan; Machado Miguens, Joana; Macina, Daniela; Madaffari, Daniele; Madar, Romain; Maddocks, Harvey Jonathan; Mader, Wolfgang; Madsen, Alexander; Maeda, Junpei; Maeland, Steffen; Maeno, Tadashi; Maevskiy, Artem; Magradze, Erekle; Mahboubi, Kambiz; Mahlstedt, Joern; Maiani, Camilla; Maidantchik, Carmen; Maier, Andreas Alexander; Maier, Thomas; Maio, Amélia; Majewski, Stephanie; Makida, Yasuhiro; Makovec, Nikola; Malaescu, Bogdan; Malecki, Pawel; Maleev, Victor; Malek, Fairouz; Mallik, Usha; Malon, David; Malone, Caitlin; Maltezos, Stavros; Malyshev, Vladimir; Malyukov, Sergei; Mamuzic, Judita; Mancini, Giada; Mandelli, Beatrice; Mandelli, Luciano; Mandić, Igor; Mandrysch, Rocco; Maneira, José; Manhaes de Andrade Filho, Luciano; Manjarres Ramos, Joany; Mann, Alexander; Manousakis-Katsikakis, Arkadios; Mansoulie, Bruno; Mantifel, Rodger; Mantoani, Matteo; Mapelli, Livio; March, Luis; Marchiori, Giovanni; Marcisovsky, Michal; Marino, Christopher; Marjanovic, Marija; Marley, Daniel; Marroquim, Fernando; Marsden, Stephen Philip; Marshall, Zach; Marti, Lukas Fritz; Marti-Garcia, Salvador; Martin, Brian; Martin, Tim; Martin, Victoria Jane; Martin dit Latour, Bertrand; Martinez, Mario; Martin-Haugh, Stewart; Martoiu, Victor Sorin; Martyniuk, Alex; Marx, Marilyn; Marzano, Francesco; Marzin, Antoine; Masetti, Lucia; Mashimo, Tetsuro; Mashinistov, Ruslan; Masik, Jiri; Maslennikov, Alexey; Massa, Ignazio; Massa, Lorenzo; Mastrandrea, Paolo; Mastroberardino, Anna; Masubuchi, Tatsuya; Mättig, Peter; Mattmann, Johannes; Maurer, Julien; Maxfield, Stephen; Maximov, Dmitriy; Mazini, Rachid; Mazza, Simone Michele; Mc Goldrick, Garrin; Mc Kee, Shawn Patrick; McCarn, Allison; McCarthy, Robert; McCarthy, Tom; McCubbin, Norman; McFarlane, Kenneth; Mcfayden, Josh; Mchedlidze, Gvantsa; McMahon, Steve; McPherson, Robert; Medinnis, Michael; Meehan, Samuel; Mehlhase, Sascha; Mehta, Andrew; Meier, Karlheinz; Meineck, Christian; Meirose, Bernhard; Mellado Garcia, Bruce Rafael; Meloni, Federico; Mengarelli, Alberto; Menke, Sven; Meoni, Evelin; Mercurio, Kevin Michael; Mergelmeyer, Sebastian; Mermod, Philippe; Merola, Leonardo; Meroni, Chiara; Merritt, Frank; Messina, Andrea; Metcalfe, Jessica; Mete, Alaettin Serhan; Meyer, Carsten; Meyer, Christopher; Meyer, Jean-Pierre; Meyer, Jochen; Meyer Zu Theenhausen, Hanno; Middleton, Robin; Miglioranzi, Silvia; Mijović, Liza; Mikenberg, Giora; Mikestikova, Marcela; Mikuž, Marko; Milesi, Marco; Milic, Adriana; Miller, David; Mills, Corrinne; Milov, Alexander; Milstead, David; Minaenko, Andrey; Minami, Yuto; Minashvili, Irakli; Mincer, Allen; Mindur, Bartosz; Mineev, Mikhail; Ming, Yao; Mir, Lluisa-Maria; Mistry, Khilesh; Mitani, Takashi; Mitrevski, Jovan; Mitsou, Vasiliki A; Miucci, Antonio; Miyagawa, Paul; Mjörnmark, Jan-Ulf; Moa, Torbjoern; Mochizuki, Kazuya; Mohapatra, Soumya; Mohr, Wolfgang; Molander, Simon; Moles-Valls, Regina; Monden, Ryutaro; Mondragon, Matthew Craig; Mönig, Klaus; Monini, Caterina; Monk, James; Monnier, Emmanuel; Montalbano, Alyssa; Montejo Berlingen, Javier; Monticelli, Fernando; Monzani, Simone; Moore, Roger; Morange, Nicolas; Moreno, Deywis; Moreno Llácer, María; Morettini, Paolo; Mori, Daniel; Mori, Tatsuya; Morii, Masahiro; Morinaga, Masahiro; Morisbak, Vanja; Moritz, Sebastian; Morley, Anthony Keith; Mornacchi, Giuseppe; Morris, John; Mortensen, Simon Stark; Morton, Alexander; Morvaj, Ljiljana; Mosidze, Maia; Moss, Josh; Motohashi, Kazuki; Mount, Richard; Mountricha, Eleni; Mouraviev, Sergei; Moyse, Edward; Muanza, Steve; Mudd, Richard; Mueller, Felix; Mueller, James; Mueller, Ralph Soeren Peter; Mueller, Thibaut; Muenstermann, Daniel; Mullen, Paul; Mullier, Geoffrey; Munoz Sanchez, Francisca Javiela; Murillo Quijada, Javier Alberto; Murray, Bill; Musheghyan, Haykuhi; Musto, Elisa; Myagkov, Alexey; Myska, Miroslav; Nachman, Benjamin Philip; Nackenhorst, Olaf; Nadal, Jordi; Nagai, Koichi; Nagai, Ryo; Nagai, Yoshikazu; Nagano, Kunihiro; Nagarkar, Advait; Nagasaka, Yasushi; Nagata, Kazuki; Nagel, Martin; Nagy, Elemer; Nairz, Armin Michael; Nakahama, Yu; Nakamura, Koji; Nakamura, Tomoaki; Nakano, Itsuo; Namasivayam, Harisankar; Naranjo Garcia, Roger Felipe; Narayan, Rohin; Narrias Villar, Daniel Isaac; Naumann, Thomas; Navarro, Gabriela; Nayyar, Ruchika; Neal, Homer; Nechaeva, Polina; Neep, Thomas James; Nef, Pascal Daniel; Negri, Andrea; Negrini, Matteo; Nektarijevic, Snezana; Nellist, Clara; Nelson, Andrew; Nemecek, Stanislav; Nemethy, Peter; Nepomuceno, Andre Asevedo; Nessi, Marzio; Neubauer, Mark; Neumann, Manuel; Neves, Ricardo; Nevski, Pavel; Newman, Paul; Nguyen, Duong Hai; Nickerson, Richard; Nicolaidou, Rosy; Nicquevert, Bertrand; Nielsen, Jason; Nikiforou, Nikiforos; Nikiforov, Andriy; Nikolaenko, Vladimir; Nikolic-Audit, Irena; Nikolopoulos, Konstantinos; Nilsen, Jon Kerr; Nilsson, Paul; Ninomiya, Yoichi; Nisati, Aleandro; Nisius, Richard; Nobe, Takuya; Nodulman, Lawrence; Nomachi, Masaharu; Nomidis, Ioannis; Nooney, Tamsin; Norberg, Scarlet; Nordberg, Markus; Novgorodova, Olga; Nowak, Sebastian; Nozaki, Mitsuaki; Nozka, Libor; Ntekas, Konstantinos; Nunes Hanninger, Guilherme; Nunnemann, Thomas; Nurse, Emily; Nuti, Francesco; O'grady, Fionnbarr; O'Neil, Dugan; O'Shea, Val; Oakham, Gerald; Oberlack, Horst; Obermann, Theresa; Ocariz, Jose; Ochi, Atsuhiko; Ochoa, Ines; Ochoa-Ricoux, Juan Pedro; Oda, Susumu; Odaka, Shigeru; Ogren, Harold; Oh, Alexander; Oh, Seog; Ohm, Christian; Ohman, Henrik; Oide, Hideyuki; Okamura, Wataru; Okawa, Hideki; Okumura, Yasuyuki; Okuyama, Toyonobu; Olariu, Albert; Olivares Pino, Sebastian Andres; Oliveira Damazio, Denis; Olszewski, Andrzej; Olszowska, Jolanta; Onofre, António; Onogi, Kouta; Onyisi, Peter; Oram, Christopher; Oreglia, Mark; Oren, Yona; Orestano, Domizia; Orlando, Nicola; Oropeza Barrera, Cristina; Orr, Robert; Osculati, Bianca; Ospanov, Rustem; Otero y Garzon, Gustavo; Otono, Hidetoshi; Ouchrif, Mohamed; Ould-Saada, Farid; Ouraou, Ahmimed; Oussoren, Koen Pieter; Ouyang, Qun; Ovcharova, Ana; Owen, Mark; Owen, Rhys Edward; Ozcan, Veysi Erkcan; Ozturk, Nurcan; Pachal, Katherine; Pacheco Pages, Andres; Padilla Aranda, Cristobal; Pagáčová, Martina; Pagan Griso, Simone; Paganis, Efstathios; Paige, Frank; Pais, Preema; Pajchel, Katarina; Palacino, Gabriel; Palestini, Sandro; Palka, Marek; Pallin, Dominique; Palma, Alberto; Pan, Yibin; Panagiotopoulou, Evgenia; Pandini, Carlo Enrico; Panduro Vazquez, William; Pani, Priscilla; Panitkin, Sergey; Pantea, Dan; Paolozzi, Lorenzo; Papadopoulou, Theodora; Papageorgiou, Konstantinos; Paramonov, Alexander; Paredes Hernandez, Daniela; Parker, Michael Andrew; Parker, Kerry Ann; Parodi, Fabrizio; Parsons, John; Parzefall, Ulrich; Pasqualucci, Enrico; Passaggio, Stefano; Pastore, Fernanda; Pastore, Francesca; Pásztor, Gabriella; Pataraia, Sophio; Patel, Nikhul; Pater, Joleen; Pauly, Thilo; Pearce, James; Pearson, Benjamin; Pedersen, Lars Egholm; Pedersen, Maiken; Pedraza Lopez, Sebastian; Pedro, Rute; Peleganchuk, Sergey; Pelikan, Daniel; Penc, Ondrej; Peng, Cong; Peng, Haiping; Penning, Bjoern; Penwell, John; Perepelitsa, Dennis; Perez Codina, Estel; Pérez García-Estañ, María Teresa; Perini, Laura; Pernegger, Heinz; Perrella, Sabrina; Peschke, Richard; Peshekhonov, Vladimir; Peters, Krisztian; Peters, Yvonne; Petersen, Brian; Petersen, Troels; Petit, Elisabeth; Petridis, Andreas; Petridou, Chariclia; Petroff, Pierre; Petrolo, Emilio; Petrucci, Fabrizio; Pettersson, Nora Emilia; Pezoa, Raquel; Phillips, Peter William; Piacquadio, Giacinto; Pianori, Elisabetta; Picazio, Attilio; Piccaro, Elisa; Piccinini, Maurizio; Pickering, Mark Andrew; Piegaia, Ricardo; Pignotti, David; Pilcher, James; Pilkington, Andrew; Pin, Arnaud Willy J; Pina, João Antonio; Pinamonti, Michele; Pinfold, James; Pingel, Almut; Pires, Sylvestre; Pirumov, Hayk; Pitt, Michael; Pizio, Caterina; Plazak, Lukas; Pleier, Marc-Andre; Pleskot, Vojtech; Plotnikova, Elena; Plucinski, Pawel; Pluth, Daniel; Poettgen, Ruth; Poggioli, Luc; Pohl, David-leon; Polesello, Giacomo; Poley, Anne-luise; Policicchio, Antonio; Polifka, Richard; Polini, Alessandro; Pollard, Christopher Samuel; Polychronakos, Venetios; Pommès, Kathy; Pontecorvo, Ludovico; Pope, Bernard; Popeneciu, Gabriel Alexandru; Popovic, Dragan; Poppleton, Alan; Pospisil, Stanislav; Potamianos, Karolos; Potrap, Igor; Potter, Christina; Potter, Christopher; Poulard, Gilbert; Poveda, Joaquin; Pozdnyakov, Valery; Pozo Astigarraga, Mikel Eukeni; Pralavorio, Pascal; Pranko, Aliaksandr; Prasad, Srivas; Prell, Soeren; Price, Darren; Price, Lawrence; Primavera, Margherita; Prince, Sebastien; Proissl, Manuel; Prokofiev, Kirill; Prokoshin, Fedor; Protopapadaki, Eftychia-sofia; Protopopescu, Serban; Proudfoot, James; Przybycien, Mariusz; Ptacek, Elizabeth; Puddu, Daniele; Pueschel, Elisa; Puldon, David; Purohit, Milind; Puzo, Patrick; Qian, Jianming; Qin, Gang; Qin, Yang; Quadt, Arnulf; Quarrie, David; Quayle, William; Queitsch-Maitland, Michaela; Quilty, Donnchadha; Raddum, Silje; Radeka, Veljko; Radescu, Voica; Radhakrishnan, Sooraj Krishnan; Radloff, Peter; Rados, Pere; Ragusa, Francesco; Rahal, Ghita; Rajagopalan, Srinivasan; Rammensee, Michael; Rangel-Smith, Camila; Rauscher, Felix; Rave, Stefan; Ravenscroft, Thomas; Raymond, Michel; Read, Alexander Lincoln; Readioff, Nathan Peter; Rebuzzi, Daniela; Redelbach, Andreas; Redlinger, George; Reece, Ryan; Reeves, Kendall; Rehnisch, Laura; Reichert, Joseph; Reisin, Hernan; Rembser, Christoph; Ren, Huan; Renaud, Adrien; Rescigno, Marco; Resconi, Silvia; Rezanova, Olga; Reznicek, Pavel; Rezvani, Reyhaneh; Richter, Robert; Richter, Stefan; Richter-Was, Elzbieta; Ricken, Oliver; Ridel, Melissa; Rieck, Patrick; Riegel, Christian Johann; Rieger, Julia; Rifki, Othmane; Rijssenbeek, Michael; Rimoldi, Adele; Rinaldi, Lorenzo; Ristić, Branislav; Ritsch, Elmar; Riu, Imma; Rizatdinova, Flera; Rizvi, Eram; Robertson, Steven; Robichaud-Veronneau, Andree; Robinson, Dave; Robinson, James; Robson, Aidan; Roda, Chiara; Roe, Shaun; Røhne, Ole; Romaniouk, Anatoli; Romano, Marino; Romano Saez, Silvestre Marino; Romero Adam, Elena; Rompotis, Nikolaos; Ronzani, Manfredi; Roos, Lydia; Ros, Eduardo; Rosati, Stefano; Rosbach, Kilian; Rose, Peyton; Rosenthal, Oliver; Rossetti, Valerio; Rossi, Elvira; Rossi, Leonardo Paolo; Rosten, Jonatan; Rosten, Rachel; Rotaru, Marina; Roth, Itamar; Rothberg, Joseph; Rousseau, David; Royon, Christophe; Rozanov, Alexandre; Rozen, Yoram; Ruan, Xifeng; Rubbo, Francesco; Rubinskiy, Igor; Rud, Viacheslav; Rudolph, Christian; Rudolph, Matthew Scott; Rühr, Frederik; Ruiz-Martinez, Aranzazu; Rurikova, Zuzana; Rusakovich, Nikolai; Ruschke, Alexander; Russell, Heather; Rutherfoord, John; Ruthmann, Nils; Ryabov, Yury; Rybar, Martin; Rybkin, Grigori; Ryder, Nick; Ryzhov, Andrey; Saavedra, Aldo; Sabato, Gabriele; Sacerdoti, Sabrina; Saddique, Asif; Sadrozinski, Hartmut; Sadykov, Renat; Safai Tehrani, Francesco; Saha, Puja; Sahinsoy, Merve; Saimpert, Matthias; Saito, Tomoyuki; Sakamoto, Hiroshi; Sakurai, Yuki; Salamanna, Giuseppe; Salamon, Andrea; Salazar Loyola, Javier Esteban; Saleem, Muhammad; Salek, David; Sales De Bruin, Pedro Henrique; Salihagic, Denis; Salnikov, Andrei; Salt, José; Salvatore, Daniela; Salvatore, Pasquale Fabrizio; Salvucci, Antonio; Salzburger, Andreas; Sammel, Dirk; Sampsonidis, Dimitrios; Sanchez, Arturo; Sánchez, Javier; Sanchez Martinez, Victoria; Sandaker, Heidi; Sandbach, Ruth Laura; Sander, Heinz Georg; Sanders, Michiel; Sandhoff, Marisa; Sandoval, Carlos; Sandstroem, Rikard; Sankey, Dave; Sannino, Mario; Sansoni, Andrea; Santoni, Claudio; Santonico, Rinaldo; Santos, Helena; Santoyo Castillo, Itzebelt; Sapp, Kevin; Sapronov, Andrey; Saraiva, João; Sarrazin, Bjorn; Sasaki, Osamu; Sasaki, Yuichi; Sato, Koji; Sauvage, Gilles; Sauvan, Emmanuel; Savage, Graham; Savard, Pierre; Sawyer, Craig; Sawyer, Lee; Saxon, James; Sbarra, Carla; Sbrizzi, Antonio; Scanlon, Tim; Scannicchio, Diana; Scarcella, Mark; Scarfone, Valerio; Schaarschmidt, Jana; Schacht, Peter; Schaefer, Douglas; Schaefer, Ralph; Schaeffer, Jan; Schaepe, Steffen; Schaetzel, Sebastian; Schäfer, Uli; Schaffer, Arthur; Schaile, Dorothee; Schamberger, R Dean; Scharf, Veit; Schegelsky, Valery; Scheirich, Daniel; Schernau, Michael; Schiavi, Carlo; Schillo, Christian; Schioppa, Marco; Schlenker, Stefan; Schmieden, Kristof; Schmitt, Christian; Schmitt, Sebastian; Schmitt, Stefan; Schmitz, Simon; Schneider, Basil; Schnellbach, Yan Jie; Schnoor, Ulrike; Schoeffel, Laurent; Schoening, Andre; Schoenrock, Bradley Daniel; Schopf, Elisabeth; Schorlemmer, Andre Lukas; Schott, Matthias; Schouten, Doug; Schovancova, Jaroslava; Schramm, Steven; Schreyer, Manuel; Schuh, Natascha; Schultens, Martin Johannes; Schultz-Coulon, Hans-Christian; Schulz, Holger; Schumacher, Markus; Schumm, Bruce; Schune, Philippe; Schwanenberger, Christian; Schwartzman, Ariel; Schwarz, Thomas Andrew; Schwegler, Philipp; Schweiger, Hansdieter; Schwemling, Philippe; Schwienhorst, Reinhard; Schwindling, Jerome; Schwindt, Thomas; Scifo, Estelle; Sciolla, Gabriella; Scuri, Fabrizio; Scutti, Federico; Searcy, Jacob; Sedov, George; Sedykh, Evgeny; Seema, Pienpen; Seidel, Sally; Seiden, Abraham; Seifert, Frank; Seixas, José; Sekhniaidze, Givi; Sekhon, Karishma; Sekula, Stephen; Seliverstov, Dmitry; Semprini-Cesari, Nicola; Serfon, Cedric; Serin, Laurent; Serkin, Leonid; Serre, Thomas; Sessa, Marco; Seuster, Rolf; Severini, Horst; Sfiligoj, Tina; Sforza, Federico; Sfyrla, Anna; Shabalina, Elizaveta; Shamim, Mansoora; Shan, Lianyou; Shang, Ruo-yu; Shank, James; Shapiro, Marjorie; Shatalov, Pavel; Shaw, Kate; Shaw, Savanna Marie; Shcherbakova, Anna; Shehu, Ciwake Yusufu; Sherwood, Peter; Shi, Liaoshan; Shimizu, Shima; Shimmin, Chase Owen; Shimojima, Makoto; Shiyakova, Mariya; Shmeleva, Alevtina; Shoaleh Saadi, Diane; Shochet, Mel; Shojaii, Seyedruhollah; Shrestha, Suyog; Shulga, Evgeny; Shupe, Michael; Sicho, Petr; Sidebo, Per Edvin; Sidiropoulou, Ourania; Sidorov, Dmitri; Sidoti, Antonio; Siegert, Frank; Sijacki, Djordje; Silva, José; Silver, Yiftah; Silverstein, Samuel; Simak, Vladislav; Simard, Olivier; Simic, Ljiljana; Simion, Stefan; Simioni, Eduard; Simmons, Brinick; Simon, Dorian; Simon, Manuel; Sinervo, Pekka; Sinev, Nikolai; Sioli, Maximiliano; Siragusa, Giovanni; Sisakyan, Alexei; Sivoklokov, Serguei; Sjölin, Jörgen; Sjursen, Therese; Skinner, Malcolm Bruce; Skottowe, Hugh Philip; Skubic, Patrick; Slater, Mark; Slavicek, Tomas; Slawinska, Magdalena; Sliwa, Krzysztof; Smakhtin, Vladimir; Smart, Ben; Smestad, Lillian; Smirnov, Sergei; Smirnov, Yury; Smirnova, Lidia; Smirnova, Oxana; Smith, Matthew; Smith, Russell; Smizanska, Maria; Smolek, Karel; Snesarev, Andrei; Snidero, Giacomo; Snyder, Scott; Sobie, Randall; Socher, Felix; Soffer, Abner; Soh, Dart-yin; Sokhrannyi, Grygorii; Solans Sanchez, Carlos; Solar, Michael; Solc, Jaroslav; Soldatov, Evgeny; Soldevila, Urmila; Solodkov, Alexander; Soloshenko, Alexei; Solovyanov, Oleg; Solovyev, Victor; Sommer, Philip; Song, Hong Ye; Soni, Nitesh; Sood, Alexander; Sopczak, Andre; Sopko, Bruno; Sopko, Vit; Sorin, Veronica; Sosa, David; Sosebee, Mark; Sotiropoulou, Calliope Louisa; Soualah, Rachik; Soukharev, Andrey; South, David; Sowden, Benjamin; Spagnolo, Stefania; Spalla, Margherita; Spangenberg, Martin; Spanò, Francesco; Spearman, William Robert; Sperlich, Dennis; Spettel, Fabian; Spighi, Roberto; Spigo, Giancarlo; Spiller, Laurence Anthony; Spousta, Martin; St Denis, Richard Dante; Stabile, Alberto; Staerz, Steffen; Stahlman, Jonathan; Stamen, Rainer; Stamm, Soren; Stanecka, Ewa; Stanek, Robert; Stanescu, Cristian; Stanescu-Bellu, Madalina; Stanitzki, Marcel Michael; Stapnes, Steinar; Starchenko, Evgeny; Stark, Jan; Staroba, Pavel; Starovoitov, Pavel; Staszewski, Rafal; Steinberg, Peter; Stelzer, Bernd; Stelzer, Harald Joerg; Stelzer-Chilton, Oliver; Stenzel, Hasko; Stewart, Graeme; Stillings, Jan Andre; Stockton, Mark; Stoebe, Michael; Stoicea, Gabriel; Stolte, Philipp; Stonjek, Stefan; Stradling, Alden; Straessner, Arno; Stramaglia, Maria Elena; Strandberg, Jonas; Strandberg, Sara; Strandlie, Are; Strauss, Emanuel; Strauss, Michael; Strizenec, Pavol; Ströhmer, Raimund; Strom, David; Stroynowski, Ryszard; Strubig, Antonia; Stucci, Stefania Antonia; Stugu, Bjarne; Styles, Nicholas Adam; Su, Dong; Su, Jun; Subramaniam, Rajivalochan; Succurro, Antonella; Suchek, Stanislav; Sugaya, Yorihito; Suk, Michal; Sulin, Vladimir; Sultansoy, Saleh; Sumida, Toshi; Sun, Siyuan; Sun, Xiaohu; Sundermann, Jan Erik; Suruliz, Kerim; Susinno, Giancarlo; Sutton, Mark; Suzuki, Shota; Svatos, Michal; Swiatlowski, Maximilian; Sykora, Ivan; Sykora, Tomas; Ta, Duc; Taccini, Cecilia; Tackmann, Kerstin; Taenzer, Joe; Taffard, Anyes; Tafirout, Reda; Taiblum, Nimrod; Takai, Helio; Takashima, Ryuichi; Takeda, Hiroshi; Takeshita, Tohru; Takubo, Yosuke; Talby, Mossadek; Talyshev, Alexey; Tam, Jason; Tan, Kong Guan; Tanaka, Junichi; Tanaka, Reisaburo; Tanaka, Shuji; Tannenwald, Benjamin Bordy; Tapia Araya, Sebastian; Tapprogge, Stefan; Tarem, Shlomit; Tarrade, Fabien; Tartarelli, Giuseppe Francesco; Tas, Petr; Tasevsky, Marek; Tashiro, Takuya; Tassi, Enrico; Tavares Delgado, Ademar; Tayalati, Yahya; Taylor, Aaron; Taylor, Frank; Taylor, Geoffrey; Taylor, Pierre Thor Elliot; Taylor, Wendy; Teischinger, Florian Alfred; Teixeira-Dias, Pedro; Temming, Kim Katrin; Temple, Darren; Ten Kate, Herman; Teng, Ping-Kun; Teoh, Jia Jian; Tepel, Fabian-Phillipp; Terada, Susumu; Terashi, Koji; Terron, Juan; Terzo, Stefano; Testa, Marianna; Teuscher, Richard; Theveneaux-Pelzer, Timothée; Thomas, Juergen; Thomas-Wilsker, Joshuha; Thompson, Emily; Thompson, Paul; Thompson, Ray; Thompson, Stan; Thomsen, Lotte Ansgaard; Thomson, Evelyn; Thomson, Mark; Thun, Rudolf; Tibbetts, Mark James; Ticse Torres, Royer Edson; Tikhomirov, Vladimir; Tikhonov, Yury; Timoshenko, Sergey; Tiouchichine, Elodie; Tipton, Paul; Tisserant, Sylvain; Todome, Kazuki; Todorov, Theodore; Todorova-Nova, Sharka; Tojo, Junji; Tokár, Stanislav; Tokushuku, Katsuo; Tollefson, Kirsten; Tolley, Emma; Tomlinson, Lee; Tomoto, Makoto; Tompkins, Lauren; Toms, Konstantin; Torrence, Eric; Torres, Heberth; Torró Pastor, Emma; Toth, Jozsef; Touchard, Francois; 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    2016-01-01

    The reconstruction of the signal from hadrons and jets emerging from the proton-proton collisions at the Large Hadron Collider (LHC) and entering the ATLAS calorimeters is based on a three-dimensional topological clustering of individual calorimeter cell signals. The cluster formation follows cell signal-significance patterns generated by electromagnetic and hadronic showers. In this, the clustering algorithm implicitly performs a topological noise suppression by removing cells with insignificant signals which are not in close proximity to cells with significant signals. The resulting topological cell clusters have shape and location information, which is exploited to apply a local energy calibration and corrections depending on the nature of the cluster. Topological cell clustering is established as a well-performing calorimeter signal definition for jet and missing transverse momentum reconstruction in ATLAS.

  10. Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1

    Science.gov (United States)

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A.; Schwegler, Ph.; Schweiger, H.; Schwemling, Ph.; Schwienhorst, R.; Schwindling, J.; Schwindt, T.; Scifo, E.; Sciolla, G.; Scuri, F.; Scutti, F.; Searcy, J.; Sedov, G.; Sedykh, E.; Seema, P.; Seidel, S. C.; Seiden, A.; Seifert, F.; Seixas, J. M.; Sekhniaidze, G.; Sekhon, K.; Sekula, S. J.; Seliverstov, D. M.; Semprini-Cesari, N.; Serfon, C.; Serin, L.; Serkin, L.; Serre, T.; Sessa, M.; Seuster, R.; Severini, H.; Sfiligoj, T.; Sforza, F.; Sfyrla, A.; Shabalina, E.; Shamim, M.; Shan, L. Y.; Shang, R.; Shank, J. T.; Shapiro, M.; Shatalov, P. B.; Shaw, K.; Shaw, S. M.; Shcherbakova, A.; Shehu, C. Y.; Sherwood, P.; Shi, L.; Shimizu, S.; Shimmin, C. O.; Shimojima, M.; Shiyakova, M.; Shmeleva, A.; Saadi, D. Shoaleh; Shochet, M. J.; Shojaii, S.; Shrestha, S.; Shulga, E.; Shupe, M. A.; Sicho, P.; Sidebo, P. E.; Sidiropoulou, O.; Sidorov, D.; Sidoti, A.; Siegert, F.; Sijacki, Dj.; Silva, J.; Silver, Y.; Silverstein, S. B.; Simak, V.; Simard, O.; Simic, Lj.; Simion, S.; Simioni, E.; Simmons, B.; Simon, D.; Simon, M.; Sinervo, P.; Sinev, N. B.; Sioli, M.; Siragusa, G.; Sisakyan, A. N.; Sivoklokov, S. Yu.; Sjölin, J.; Sjursen, T. B.; Skinner, M. B.; Skottowe, H. P.; Skubic, P.; Slater, M.; Slavicek, T.; Slawinska, M.; Sliwa, K.; Smakhtin, V.; Smart, B. H.; Smestad, L.; Smirnov, S. Yu.; Smirnov, Y.; Smirnova, L. N.; Smirnova, O.; Smith, M. N. K.; Smith, R. W.; Smizanska, M.; Smolek, K.; Snesarev, A. A.; Snidero, G.; Snyder, S.; Sobie, R.; Socher, F.; Soffer, A.; Soh, D. A.; Sokhrannyi, G.; Sanchez, C. A. Solans; Solar, M.; Solc, J.; Soldatov, E. Yu.; Soldevila, U.; Solodkov, A. A.; Soloshenko, A.; Solovyanov, O. V.; Solovyev, V.; Sommer, P.; Song, H. Y.; Soni, N.; Sood, A.; Sopczak, A.; Sopko, B.; Sopko, V.; Sorin, V.; Sosa, D.; Sosebee, M.; Sotiropoulou, C. L.; Soualah, R.; Soukharev, A. M.; South, D.; Sowden, B. C.; Spagnolo, S.; Spalla, M.; Spangenberg, M.; Spanò, F.; Spearman, W. R.; Sperlich, D.; Spettel, F.; Spighi, R.; Spigo, G.; Spiller, L. A.; Spousta, M.; Denis, R. D. St.; Stabile, A.; Staerz, S.; Stahlman, J.; Stamen, R.; Stamm, S.; Stanecka, E.; Stanek, R. W.; Stanescu, C.; Stanescu-Bellu, M.; Stanitzki, M. M.; Stapnes, S.; Starchenko, E. A.; Stark, J.; Staroba, P.; Starovoitov, P.; Staszewski, R.; Steinberg, P.; Stelzer, B.; Stelzer, H. J.; Stelzer-Chilton, O.; Stenzel, H.; Stewart, G. A.; Stillings, J. A.; Stockton, M. C.; Stoebe, M.; Stoicea, G.; Stolte, P.; Stonjek, S.; Stradling, A. R.; Straessner, A.; Stramaglia, M. E.; Strandberg, J.; Strandberg, S.; Strandlie, A.; Strauss, E.; Strauss, M.; Strizenec, P.; Ströhmer, R.; Strom, D. M.; Stroynowski, R.; Strubig, A.; Stucci, S. A.; Stugu, B.; Styles, N. A.; Su, D.; Su, J.; Subramaniam, R.; Succurro, A.; Suchek, S.; Sugaya, Y.; Suk, M.; Sulin, V. V.; Sultansoy, S.; Sumida, T.; Sun, S.; Sun, X.; Sundermann, J. E.; Suruliz, K.; Susinno, G.; Sutton, M. R.; Suzuki, S.; Svatos, M.; Swiatlowski, M.; Sykora, I.; Sykora, T.; Ta, D.; Taccini, C.; Tackmann, K.; Taenzer, J.; Taffard, A.; Tafirout, R.; Taiblum, N.; Takai, H.; Takashima, R.; Takeda, H.; Takeshita, T.; Takubo, Y.; Talby, M.; Talyshev, A. A.; Tam, J. Y. C.; Tan, K. G.; Tanaka, J.; Tanaka, R.; Tanaka, S.; Tannenwald, B. B.; Araya, S. Tapia; Tapprogge, S.; Tarem, S.; Tarrade, F.; Tartarelli, G. F.; Tas, P.; Tasevsky, M.; Tashiro, T.; Tassi, E.; Delgado, A. Tavares; Tayalati, Y.; Taylor, A. C.; Taylor, F. E.; Taylor, G. N.; Taylor, P. T. E.; Taylor, W.; Teischinger, F. A.; Teixeira-Dias, P.; Temming, K. K.; Temple, D.; Kate, H. Ten; Teng, P. K.; Teoh, J. J.; Tepel, F.; Terada, S.; Terashi, K.; Terron, J.; Terzo, S.; Testa, M.; Teuscher, R. J.; Theveneaux-Pelzer, T.; Thomas, J. P.; Thomas-Wilsker, J.; Thompson, E. N.; Thompson, P. D.; Thompson, R. J.; Thompson, A. S.; Thomsen, L. A.; Thomson, E.; Thomson, M.; Thun, R. P.; Tibbetts, M. J.; Torres, R. E. Ticse; Tikhomirov, V. 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    2017-07-01

    The reconstruction of the signal from hadrons and jets emerging from the proton-proton collisions at the Large Hadron Collider (LHC) and entering the ATLAS calorimeters is based on a three-dimensional topological clustering of individual calorimeter cell signals. The cluster formation follows cell signal-significance patterns generated by electromagnetic and hadronic showers. In this, the clustering algorithm implicitly performs a topological noise suppression by removing cells with insignificant signals which are not in close proximity to cells with significant signals. The resulting topological cell clusters have shape and location information, which is exploited to apply a local energy calibration and corrections depending on the nature of the cluster. Topological cell clustering is established as a well-performing calorimeter signal definition for jet and missing transverse momentum reconstruction in ATLAS.

  11. The ATLAS Tile Calorimeter, its performance with pp collisions and its upgrades for high luminosity LHC

    CERN Document Server

    Davidek, Tomas; The ATLAS collaboration

    2016-01-01

    The Tile Calorimeter (TileCal) is the central hadronic calorimeter of the ATLAS experiment at the LHC. Jointly with the other calorimeters it is designed for reconstruction of hadrons, jets, tau-particles and missing transverse energy. It also assists in the muon identification.  A summary of the upgrades and performance results for TileCal using pp collisions from the initial LHC Run II at 13 TeV will be presented. For the high luminosity era a major upgrade of the TileCal electronics is planned, and the ongoing developments for on- and off-detector systems, together with expected performance characteristics and recent beam tests of prototypes, will be described.

  12. Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1.

    Science.gov (United States)

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Torres, R E Ticse; Tikhomirov, V O; Tikhonov, Yu A; Timoshenko, S; Tiouchichine, E; Tipton, P; Tisserant, S; Todome, K; Todorov, T; Todorova-Nova, S; Tojo, J; Tokár, S; Tokushuku, K; Tollefson, K; Tolley, E; Tomlinson, L; Tomoto, M; Tompkins, L; Toms, K; Torrence, E; Torres, H; Pastor, E Torró; Toth, J; Touchard, F; Tovey, D R; Trefzger, T; Tremblet, L; Tricoli, A; Trigger, I M; Trincaz-Duvoid, S; Tripiana, M F; Trischuk, W; Trocmé, B; Troncon, C; Trottier-McDonald, M; Trovatelli, M; Truong, L; Trzebinski, M; Trzupek, A; Tsarouchas, C; Tseng, J C-L; Tsiareshka, P V; Tsionou, D; Tsipolitis, G; Tsirintanis, N; Tsiskaridze, S; Tsiskaridze, V; Tskhadadze, E G; Tsui, K M; Tsukerman, I I; Tsulaia, V; Tsuno, S; Tsybychev, D; Tudorache, A; Tudorache, V; Tuna, A N; Tupputi, S A; Turchikhin, S; Turecek, D; Turra, R; Turvey, A J; Tuts, P M; Tykhonov, A; Tylmad, M; Tyndel, M; Ueda, I; Ueno, R; Ughetto, M; Ukegawa, F; Unal, G; Undrus, A; Unel, G; Ungaro, F C; Unno, Y; Unverdorben, C; Urban, J; Urquijo, P; Urrejola, P; Usai, G; Usanova, A; Vacavant, L; Vacek, V; Vachon, B; Valderanis, C; Valencic, N; Valentinetti, S; Valero, A; Valery, L; Valkar, S; Vallecorsa, S; Ferrer, J A Valls; Van Den Wollenberg, W; Van Der Deijl, P C; van der Geer, R; van der Graaf, H; van Eldik, N; van Gemmeren, P; Van Nieuwkoop, J; van Vulpen, I; van Woerden, M C; Vanadia, M; Vandelli, W; Vanguri, R; Vaniachine, A; Vannucci, F; Vardanyan, G; Vari, R; Varnes, E W; Varol, T; Varouchas, D; Vartapetian, A; Varvell, K E; Vazeille, F; Schroeder, T Vazquez; Veatch, J; Veloce, L M; Veloso, F; Velz, T; Veneziano, S; Ventura, A; Ventura, D; Venturi, M; Venturi, N; Venturini, A; Vercesi, V; Verducci, M; Verkerke, W; Vermeulen, J C; Vest, A; Vetterli, M C; Viazlo, O; Vichou, I; Vickey, T; Boeriu, O E Vickey; Viehhauser, G H A; Viel, S; Vigne, R; Villa, M; Perez, M Villaplana; Vilucchi, E; Vincter, M G; Vinogradov, V B; Vivarelli, I; Vlachos, S; Vladoiu, D; Vlasak, M; Vogel, M; Vokac, P; Volpi, G; Volpi, M; von der Schmitt, H; von Radziewski, H; von Toerne, E; Vorobel, V; Vorobev, K; Vos, M; Voss, R; Vossebeld, J H; Vranjes, N; Milosavljevic, M Vranjes; Vrba, V; Vreeswijk, M; Vuillermet, R; Vukotic, I; Vykydal, Z; Wagner, P; Wagner, W; Wahlberg, H; Wahrmund, S; Wakabayashi, J; Walder, J; Walker, R; Walkowiak, W; Wang, C; Wang, F; Wang, H; Wang, H; Wang, J; Wang, J; Wang, K; Wang, R; Wang, S M; Wang, T; Wang, T; Wang, X; Wanotayaroj, C; Warburton, A; Ward, C P; Wardrope, D R; Washbrook, A; Wasicki, C; Watkins, P M; Watson, A T; Watson, I J; Watson, M F; Watts, G; Watts, S; Waugh, B M; Webb, S; Weber, M S; Weber, S W; Webster, J S; Weidberg, A R; Weinert, B; Weingarten, J; Weiser, C; Weits, H; Wells, P S; Wenaus, T; Wengler, T; Wenig, S; Wermes, N; Werner, M; Werner, P; Wessels, M; Wetter, J; Whalen, K; Wharton, A M; White, A; White, M J; White, R; White, S; Whiteson, D; Wickens, F J; Wiedenmann, W; Wielers, M; Wienemann, P; Wiglesworth, C; Wiik-Fuchs, L A M; Wildauer, A; Wilkens, H G; Williams, H H; Williams, S; Willis, C; Willocq, S; Wilson, A; Wilson, J A; Wingerter-Seez, I; Winklmeier, F; Winter, B T; Wittgen, M; Wittkowski, J; Wollstadt, S J; Wolter, M W; Wolters, H; Wosiek, B K; Wotschack, J; Woudstra, M J; Wozniak, K W; Wu, M; Wu, M; Wu, S L; Wu, X; Wu, Y; Wyatt, T R; Wynne, B M; Xella, S; Xu, D; Xu, L; Yabsley, B; Yacoob, S; Yakabe, R; Yamada, M; Yamaguchi, D; Yamaguchi, Y; Yamamoto, A; Yamamoto, S; Yamanaka, T; Yamauchi, K; Yamazaki, Y; Yan, Z; Yang, H; Yang, H; Yang, Y; Yao, W-M; Yap, Y C; Yasu, Y; Yatsenko, E; Wong, K H Yau; Ye, J; Ye, S; Yeletskikh, I; Yen, A L; Yildirim, E; Yorita, K; Yoshida, R; Yoshihara, K; Young, C; Young, C J S; Youssef, S; Yu, D R; Yu, J; Yu, J M; Yu, J; Yuan, L; Yuen, S P Y; Yurkewicz, A; Yusuff, I; Zabinski, B; Zaidan, R; Zaitsev, A M; Zalieckas, J; Zaman, A; Zambito, S; Zanello, L; Zanzi, D; Zeitnitz, C; Zeman, M; Zemla, A; Zeng, J C; Zeng, Q; Zengel, K; Zenin, O; Ženiš, T; Zerwas, D; Zhang, D; Zhang, F; Zhang, G; Zhang, H; Zhang, J; Zhang, L; Zhang, R; Zhang, X; Zhang, Z; Zhao, X; Zhao, Y; Zhao, Z; Zhemchugov, A; Zhong, J; Zhou, B; Zhou, C; Zhou, L; Zhou, L; Zhou, M; Zhou, N; Zhu, C G; Zhu, H; Zhu, J; Zhu, Y; Zhuang, X; Zhukov, K; Zibell, A; Zieminska, D; Zimine, N I; Zimmermann, C; Zimmermann, S; Zinonos, Z; Zinser, M; Ziolkowski, M; Živković, L; Zobernig, G; Zoccoli, A; Nedden, M Zur; Zurzolo, G; Zwalinski, L

    2017-01-01

    The reconstruction of the signal from hadrons and jets emerging from the proton-proton collisions at the Large Hadron Collider (LHC) and entering the ATLAS calorimeters is based on a three-dimensional topological clustering of individual calorimeter cell signals. The cluster formation follows cell signal-significance patterns generated by electromagnetic and hadronic showers. In this, the clustering algorithm implicitly performs a topological noise suppression by removing cells with insignificant signals which are not in close proximity to cells with significant signals. The resulting topological cell clusters have shape and location information, which is exploited to apply a local energy calibration and corrections depending on the nature of the cluster. Topological cell clustering is established as a well-performing calorimeter signal definition for jet and missing transverse momentum reconstruction in ATLAS.

  13. Design and Performance Tests of Ultra-Compact Calorimeters for High Energy Astrophysics

    Science.gov (United States)

    Salgado, Carlos W.

    2003-01-01

    This R&D project had two goals: a) the study of general-application ultra-compact calorimetry technologies for use in High Energy Astrophysics and, b) contribute to the design of an efficient calorimeter for the ACCESS mission. The direct measurement of galactic cosmic ray fluxes is performed from space or from balloon-borne detectors. Detectors used in those studies are limited in size and, specially, in weight. Since galactic cosmic ray fluxes are very small, detectors with high geometrical acceptances and long exposures are usually required for collecting enough statistics. We have studied calorimeter techniques that could produce large geometrical acceptance per unit of mass (G/w) and that may be used to study galactic cosmic rays at intermediate energies (knee energies).-The most important asset for detection of primary cosmic rays at and about the knee is large acceptance. To construct a large acceptance calorimeter (this term is used here in its most general accepted meaning of calorimeter as a device to measure particle energies ) the detector needs to be verv liaht or verv shallow . We studied two possible technologies to built compact calorimeters: the use of lead-tungstate crystals (PWO) and the use of sampling calorimetry using scintillating fibers embedded in a matrix of powder tungsten. For a very light detector, we considered the possibility of using Optical Transition Radiation (OTR) to measure the energy (and perhaps also direction and identity) of VHE cosmic rays.

  14. Electronic Readout of the Atlas Liquid Argon Calorimeter: Calibration and Performance

    CERN Document Server

    Majewski, S; The ATLAS collaboration

    2010-01-01

    The Liquid Argon (LAr) calorimeter is a key detector component in the ATLAS experiment at the Large Hadron Collider (LHC) at CERN. The LHC is a proton-proton collider with a center-of-mass energy of 14 TeV. The machine has been operated at energies of 900 GeV and 2.36 TeV in 2009 and is expected to reach the energy of 7 TeV in 2010. The LAr calorimeter is designed to provide precision measurements of electrons, photons, jets and missing transverse energy. It consists of a set of sampling calorimeters with liquid argon as active medium kept into three separate cryostats. The LAr calorimeters are read out via a system of custom electronics. The electronic readout of the ATLAS LAr calorimeters is divided into a Front End (FE) system of boards mounted in custom crates directly on the cryostat feedthroughs, and a Back End (BE) system of VME-based boards located in an off-detector underground counting room where there is no radiation. The FE system includes Front End boards (FEBs), which perform the readout and dig...

  15. Calibration and Performance of the ATLAS Tile Calorimeter During the Run 2 of the LHC

    CERN Document Server

    Solovyanov, Oleg; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) is a hadronic calorimeter covering the central region of the ATLAS experiment at the LHC. It is a non-compensating sampling calorimeter comprised of steel and scintillating plastic tiles which are read-out by photomultiplier tubes (PMT). The TileCal is regularly monitored and calibrated by several di erent calibration systems: a Cs radioactive source that illuminates the scintillating tiles directly, a laser light system to directly test the PMT response, and a charge injection system (CIS) for the front-end electronics. These calibrations systems, in conjunction with data collected during proton-proton collisions, provide extensive monitoring of the instrument and a means for equalizing the calorimeter response at each stage of the signal propagation. The performance of the calorimeter and its calibration has been established with cosmic ray muons and the large sample of the proton-proton collisions to study the energy response at the electromagnetic scale, probe of the hadroni...

  16. Calibration and reconstruction performances of the KLOE electromagnetic calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Adinolfi, M.; Aloisio, A.; Ambrosino, F.; Andryakov, A.; Antonelli, A.; Antonelli, M.; Anulli, F.; Bacci, C.; Bankamp, A.; Barbiellini, G.; Bellini, F.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocci, V.; Bossi, F.; Branchini, P.; Bulychjov, S.A.; Cabibbo, G.; Calcaterra, A.; Caloi, R.; Campana, P.; Capon, G.; Carboni, G.; Cardini, A.; Casarsa, M.; Cataldi, G.; Ceradini, F.; Cervelli, F.; Cevenini, F.; Chiefari, G.; Ciambrone, P.; Conetti, S.; Conticelli, S.; Lucia, E. De; Robertis, G. De; Sangro, R. De; Simone, P. De; Zorzi, G. De; Dell' Agnello, S.; Denig, A.; Domenico, A. Di; Donato, C. Di; Falco, S. Di; Doria, A.; Drago, E.; Elia, V.; Erriquez, O.; Farilla, A.; Felici, G.; Ferrari, A.; Ferrer, M.L.; Finocchiaro, G.; Forti, C.; Franceschi, A.; Franzini, P.; Gao, M.L.; Gatti, C.; Gauzzi, P.; Giovannella, S.; Golovatyuk, V.; Gorini, E.; Grancagnolo, F.; Grandegger, W.; Graziani, E.; Guarnaccia, P.; Hagel, U.V.; Han, H.G.; Han, S.W.; Huang, X.; Incagli, M.; Ingrosso, L.; Jang, Y.Y.; Kim, W.; Kluge, W.; Kulikov, V.; Lacava, F.; Lanfranchi, G.; Lee-Franzini, J.; Lomtadze, F.; Luisi, C.; Mao, C.S.; Martemianov, M.; Matsyuk, M.; Mei, W.; Merola, L.; Messi, R.; Miscetti, S. E-mail: stefano.miscetti@lnf.infn.it; Moalem, A.; Moccia, S.; Moulson, M.; Mueller, S.; Murtas, F.; Napolitano, M.; Nedosekin, A.; Panareo, M.; Pacciani, L.; Pages, P.; Palutan, M.; Paoluzi, L.; Pasqualucci, E.; Passalacqua, L.; Passaseo, M.; Passeri, A.; Patera, V.; Petrolo, E.; Petrucci, G.; Picca, D.; Pirozzi, G.; Pistillo, C.; Pollack, M.; Pontecorvo, L.; Primavera, M.; Ruggieri, F.; Santangelo, P.; Santovetti, E.; Saracino, G.; Schamberger, R.D.; Schwick, C.; Sciascia, B.; Sciubba, A.; Scuri, F.; Sfiligoi, I.; Shan, J.; Silano, P.; Spadaro, T.; Spagnolo, S.; Spiriti, E.; Stanescu, C.; Tong, G.L.; Tortora, L.; Valente, E.; Valente, P.; Valeriani, B.; Venanzoni, G.; Veneziano, S.; Wu, Y.; Xie, Y.G.; Zhao, P.P.; Zhou, Y

    2001-04-01

    The main aim of the KLOE experiment at DAPHINE, the Frascati phi-factory, is to study CP violation in the K{sup 0}-K-bar{sup 0} system. Requirements on shower detection are very stringent. An hermetic, lead-scintillating fiber sampling calorimeter has been chosen and built. A review of the methods used to calibrate and reconstruct energy and timing is reported in this paper. Emphasis is given to the calibration procedures developed using the 2.4 pb{sup -1} collected in 1999. An energy resolution of 5.7% E/GeV is achieved together with a linearity in energy response better than 1% above 50 MeV. A time resolution of {approx}54 ps E/GeV is also measured on samples of radiative Bhabha and PHI decays.

  17. Calibration and reconstruction performances of the KLOE electromagnetic calorimeter

    CERN Document Server

    Adinolfi, M; Ambrosino, F; Andryakov, A; Antonelli, A; Antonelli, M; Anulli, F; Bacci, C; Bankamp, A; Barbiellini, G; Bellini, F; Bencivenni, G; Bertolucci, Sergio; Bini, C; Bloise, C; Bocci, V; Bossi, F; Branchini, P; Bulychjov, S A; Cabibbo, G; Calcaterra, A; Caloi, R; Campana, P; Capon, G; Carboni, G; Cardini, A; Casarsa, M; Cataldi, G; Ceradini, F; Cervelli, F; Cevenini, F; Chiefari, G; Ciambrone, P; Conetti, S; Conticelli, S; Lucia, E D; Robertis, G D; Sangro, R D; Simone, P D; Zorzi, G D; Dell'Agnello, S; Denig, A; Domenico, A D; Donato, C D; Falco, S D; Doria, A; Drago, E; Elia, V; Erriquez, O; Farilla, A; Felici, G; Ferrari, A; Ferrer, M L; Finocchiaro, G; Forti, C; Franceschi, A; Franzini, P; Gao, M L; Gatti, C; Gauzzi, P; Giovannella, S; Golovatyuk, V; Gorini, E; Grancagnolo, F; Grandegger, W; Graziani, E; Guarnaccia, P; Von Hagel, U; Han, H G; Han, S W; Huang, X; Incagli, M; Ingrosso, L; Jang, Y Y; Kim, W; Kluge, W; Kulikov, V; Lacava, F; Lanfranchi, G; Lee-Franzini, J; Lomtadze, F; Luisi, C; Mao Chen Sheng; Martemyanov, M; Matsyuk, M; Mei, W; Merola, L; Messi, R; Miscetti, S; Moalem, A; Moccia, S; Moulson, M; Müller, S; Murtas, F; Napolitano, M; Nedosekin, A; Panareo, M; Pacciani, L; Pagès, P; Palutan, M; Paoluzi, L; Pasqualucci, E; Passalacqua, L; Passaseo, M; Passeri, A; Patera, V; Petrolo, E; Petrucci, Guido; Picca, D; Pirozzi, G; Pistillo, C; Pollack, M; Pontecorvo, L; Primavera, M; Ruggieri, F; Santangelo, P; Santovetti, E; Saracino, G; Schamberger, R D; Schwick, C; Sciascia, B; Pirozzi, G; Sciubba, A; Scuri, F; Sfiligoi, I; Shan, J; Silano, P; Spadaro, T; Spagnolo, S; Spiriti, E; Stanescu, C; Tong, G L; Tortora, L; Valente, E; Valente, P; Valeriani, B; Venanzoni, G; Veneziano, Stefano; Wu, Y; Xie, Y G; Zhao, P P; Zhou, Y

    2001-01-01

    The main aim of the KLOE experiment at DAPHINE, the Frascati phi-factory, is to study CP violation in the K sup 0 -K-bar sup 0 system. Requirements on shower detection are very stringent. An hermetic, lead-scintillating fiber sampling calorimeter has been chosen and built. A review of the methods used to calibrate and reconstruct energy and timing is reported in this paper. Emphasis is given to the calibration procedures developed using the 2.4 pb sup - sup 1 collected in 1999. An energy resolution of 5.7% E/GeV is achieved together with a linearity in energy response better than 1% above 50 MeV. A time resolution of approx 54 ps E/GeV is also measured on samples of radiative Bhabha and PHI decays.

  18. Timing performance of the CMS electromagnetic calorimeter and prospects for the future

    CERN Document Server

    Del Re, Daniele

    2014-01-01

    The CMS electromagnetic calorimeter (ECAL) is made of about 75000 scintillating lead tungstate crystals arranged in a barrel and two endcaps. The scintillation light is read out by avalanche photodiodes in the barrel and vacuum phototriodes in the endcaps, at which point the scintillation pulse is amplified and sampled at 40 MHz by the on-detector electronics. The fast signal from the crystal scintillation enables energy as well as timing measurements from the data collected in proton-proton collisions with high energy electrons and photons. The stability of the timing measurement required to maintain the energy resolution is on the order of 1ns. The single-channel time resolution of ECAL measured at beam tests for high energy showers is better than 100 ps. The timing resolution achieved with the data collected in proton-proton collisions at the LHC is presented. The timing precision achieved is used in important physics measurements and also allows the study of subtle calorimetric effects, such as the timin...

  19. Timing performance of the CMS electromagnetic calorimeter and prospects for the future

    CERN Document Server

    Bornheim, Adolf

    2014-01-01

    The CMS electromagnetic calorimeter (ECAL) is made of 75,848 scintillating lead tungstate crystals arranged in a barrel and two endcaps. The scintillation light is read out by avalanche photodiodes in the barrel and vacuum phototriodes in the endcaps, at which point the scintillation pulse is amplified and sampled at 40 MHz by the on-detector electronics. The fast signal from the crystal scintillation enables energy as well as timing measurements from the data collected in proton-proton collisions with high energy electrons and photons. The single-channel time resolution of ECAL measured at beam tests for high energy showers is better than 100 ps. The timing resolution achieved with the data collected in proton-proton collisions at the LHC is discussed. We present how precision timing is used in current physics measurements and discuss studies of subtle calorimetric effects, such as the timing response of different crystals belonging to the same electromagnetic shower. In addition, we present prospects for th...

  20. Status of the Atlas Calorimeters: their performance after two years of LHC operation and plans for future upgrades

    CERN Document Server

    Solans, CA; The ATLAS collaboration

    2012-01-01

    The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. Its calorimeter system measures the energy and direction of final state particles with pseudo rapidity $|eta| < 4.9$. Accurate identification and measurement of the characteristics of electromagnetic objects (electrons/photons) are performed by liquid argon (LAr)-lead sampling calorimeters in the region $|eta| < 3.2$, using an innovative accordion geometry that provides a fast, uniform azimuthal response without gaps. The hadronic calorimeters measure the properties of hadrons, jets, and tau leptons, and also contribute to the measurement of the missing transverse energy and identification of muons. This is done in the region $|eta| < 1.7$ with a scintillator-steel sampling calorimeter, and in the region $1.4 < |eta| < 3.2$ with a copper-LAr sampling calorimeter. The coverage is extended to $|eta| < 4.9$ by an integrated forward calorimeter (FCal...

  1. Performance of an endcap prototype of the ATLAS accordion electromagnetic calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Gingrich, D.M. [Alberta Univ., Edmonton, AB (Canada); Greeniaus, G. [Alberta Univ., Edmonton, AB (Canada); Kitching, P. [Alberta Univ., Edmonton, AB (Canada); Olsen, B. [Alberta Univ., Edmonton, AB (Canada); Pinfold, J.L. [Alberta Univ., Edmonton, AB (Canada); Rodning, N.L. [Alberta Univ., Edmonton, AB (Canada); Boos, E.; Zhautykov, B.O.; Aubert, B.; Bazan, A.; Beaugiraud, B.; Boniface, J.; Colas, J.; Jezequel, S.; Leflour, T.; Maire, M.; Rival, F.; Stipcevic, M.; Thion, J.; Van Den Plas, D.; Wingerter-Seez, I.; Zitoun, R.; Zolnierowski, Y.P.; Chmeissani, M.; Fernandez, E.; Garrido, Ll.; Martinez, M.; Padilla, C.; Gordon, H.A.; Radeka, V.; Rahm, D.; Stephani, D.; Baisin, L.; Berset, J.C.; Chevalley, J.L.; Gianotti, F.; Gildemeister, O.; Marin, C.P.; Nessi, M.; Poggioli, L.; Richter, W.; Vuillemin, V.; Baze, J.M.; Gosset, L.; Lavocat, P.; Lottin, J.P.; Mansoulie, B.; Meyer, J.P.; Renardy, J.F.; Schwindling, J.; Teiger, J.; Collot, J.; Saintignon, P. de; Dzahini, D.; Hostachy, J.Y.; Laborie, G.; Mahout, G.; Merchez, E.; Pouxe, J.; Hervas, L.; Labarga, L.; Scheel, C.V.; Chekhtman, A.; Dargent, P.; Dinkespiller, B.; Etienne, F.; Fassnacht, P.; Fouchez, D.; Martin, L.; Martin, O.; Miotto, A.; Monnier, E.; Nagy, E.; Olivetto, C.; Tisserant, S.; Battistoni, G.; Camin, D.V.; Cavalli, D.; Costa, G.; Cozzi, L.; Cravero, A.; Fedyakin, N.; Ferrari, A.; Mandelli, L.; Mazzanti, M.; Perini, L.; Sala, P.; Azuelos, G.; Beaudoin, G.; Depommier, P.; Leon-Florian, E.; Leroy, C.; Roy, P.; Seman, M.; Auge, E.; Chase, R.; Chollet, J.C.; La Taille, C. de; Fayard, L.; Fournier, D.; Hrisoho, A.; Merkel, B.; Noppe, J.M.; Parrour, G.; Petroff, P.; Schaffer, A.; Seguin-Moreau, N.; Serin, L.; Tisserand, V.; Vichou, I.; Canton, B.; David, J.; Genat, J.F.; Imbault, D.; Le Dortz, O.; Savoy-Navarro, A.; Schwemling, P.; Eek, L.O.; Lund-Jensen, B.; Soederqvist, J.; Lefebvre, M.; Robertson, S.; White, J.; RD3 Collaboration

    1997-04-21

    The design and construction of a lead-liquid-argon endcap calorimeter prototype using an accordion geometry and conceived as a sector of the inner wheel of the endcap calorimeter of the future ATLAS experiment at the LHC is described. The performance obtained using electron beam data is presented. The main results are energy resolution with a sampling term below 11%/{radical}(E(GeV)) and a small local constant term, good linearity of the response with the incident energy and a global constant term of 0.8% over an extended area in the rapidity range 2.2 < {eta} < 2.9. These properties make the design suitable for the ATLAS electromagnetic endcap calorimeter. (orig.).

  2. Performance of the ATLAS Tile Hadronic Calorimeter at LHC in Run 1 and planned upgrades

    CERN Document Server

    Solovyanov, Oleg; The ATLAS collaboration

    2014-01-01

    The Tile Calorimeter (TileCal) is the central section of the ATLAS hadronic calorimeter at the Large Hadron Collider, a key detector for the measurements of hadrons, jets, tau leptons and missing transverse energy. Scintillation light produced in the tiles is transmitted by wavelength shifting fibres to photomultiplier tubes (PMTs). The resulting electronic signals from approximately 10000 PMTs are digitized before being transferred to off-detector data-acquisition systems. The data quality procedures used during the LHC data-taking and the evolution of the detector status are explained in the presentation. The energy and the time reconstruction performance of the digitized signals is presented and the noise behaviour and its improvement during the detector consolidation in maintenance periods are shown. A set of calibration systems allow monitoring and equalization of the calorimeter channels responses via signal sources that act at every stage of the signal path, from scintillation light to digitized signal...

  3. The performance of the ATLAS Level-1 Calorimeter Trigger with LHC collision data

    CERN Document Server

    Bracinik, J

    2011-01-01

    The ATLAS first-level calorimeter trigger is a hardware-based system designed to identify high-E$_T$ jets, electron/photon and $ au$ candidates and to measure total and missing E$_T$ in the ATLAS calorimeters. After more than two years of commissioning in situ with calibration data and cosmic rays, the system has now been used extensively to select the most interesting proton-proton collision events. Fine tuning of timing and energy calibration has been carried out in 2010 to improve the trigger response to physics objects. In these proceedings, an analysis of the performance of the level-1 calorimeter trigger is presented, along with the techniques used to achieve these results.

  4. Performance of an endcap prototype of the ATLAS accordion electromagnetic calorimeter

    CERN Document Server

    Gingrich, D M; Boos, E; Zhautykov, B O; Aubert, Bernard; Bazan, A; Beaugiraud, B; Boniface, J; Colas, Jacques; Jézéquel, S; Le Flour, T; Maire, M; Rival, F; Stipcevic, M; Thion, J; Van den Plas, D; Wingerter-Seez, I; Zitoun, R; Zolnierowski, Y; Chmeissani, M; Fernández, E; Garrido, L; Martínez, M; Padilla, C; Gordon, H A; Radeka, V; Rahm, David Charles; Stephani, D; Baisin, L; Berset, J C; Chevalley, J L; Gianotti, F; Gildemeister, O; Marin, C P; Nessi, Marzio; Poggioli, Luc; Richter, W; Vuillemin, V; Baze, J M; Gosset, L G; Lavocat, P; Lottin, J P; Mansoulié, B; Meyer, J P; Renardy, J F; Schwindling, J; Teiger, J; Collot, J; de Saintignon, P; Dzahini, D; Hostachy, J Y; Laborie, G; Mahout, G; Merchez, E; Pouxe, J; Hervás, L; Labarga, L; Scheel, C V; Chekhtman, A; Dargent, P; Dinkespiler, B; Etienne, F; Fassnacht, P; Fouchez, D; Martin, L; Martin, O; Miotto, A; Monnier, E; Nagy, E; Olivetto, C; Tisserant, S; Battistoni, G; Camin, D V; Cavalli, D; Costa, G; Cozzi, L; Resconi, S; Fedyakin, N N; Ferrari, A; Mandelli, L; Mazzanti, M; Perini, L; Sala, P R; Azuelos, Georges; Beaudoin, G; Depommier, P; León-Florián, E; Leroy, C; Roy, P; Serman, M; Augé, E; Chase, Robert L; Chollet, J C; de La Taille, C; Fayard, Louis; Fournier, D; Hrisoho, A T; Merkel, B; Noppe, J M; Parrour, G; Pétroff, P; Schaffer, A C; Seguin-Moreau, N; Serin, L; Tisserand, V; Vichou, I; Canton, B; David, J; Genat, J F; Imbault, D; Le Dortz, O; Savoy-Navarro, Aurore; Schwemling, P; Eek, L O; Lund-Jensen, B; Söderqvist, J; Lefebvre, M; Robertson, S; White, J

    1997-01-01

    The design and construction of a lead-liquid argon endcap calorimeter prototype using an accordion geometry and conceived as a sector of the inner wheel of the endcap calorimeter of the future ATLAS experiment at the LHC is described. The performance obtained using electron beam data is presented. The main results are an energy resolution with a sampling term below $11\\%/\\sqrt{E(\\rm GeV)}$ and a small local constant term, a good linearity of the response with the incident energy and a global constant term of 0.8\\% over an extended area in the rapidity range of $2.2 < \\eta <2.9$. These properties make the design suitable for the ATLAS electromagnetic endcap calorimeter.

  5. Performance of a 3d Imaging Electromagnetic Calorimeter for the AMS02 Space Experiment

    Science.gov (United States)

    Adloff, C.; Coignet, G.; Girard, L.; Goy, C.; Kossakowski, R.; Lees-Rosier, S.; Pochon, J.; Vialle, J. P.; Cervelli, F.; di Falco, S.; Galeotti, S.; Incagli, M.; Pedreschi, E.; Spinella, F.; Venanzoni, G.; Falchini, E.; Maestro, P.; Marrocchesi, P. S.; Paoletti, R.; Pilo, F.; Turini, N.; Valle, G.; Bolmont, J.; Jacholkowska, A.; Piron, F.; Sapinski, M.; Chen, G.; Chen, G.; Chen, H. S.; Lu, Y.; Yang, C.

    2005-02-01

    A 3D imaging electromagnetic calorimeter (ECAL) based on a lead/scintillating-fiber sandwich has been developed for the AMS-02 experiment on the International Space Station. This calorimeter should fulfill the constraints due to the launch and to the operation conditions in space. The engineering model of the ECAL was put through space qualification tests. Results of the vibration and thermal-vacuum tests are presented. To satisfy the physics aims, precise energy measurement and high discrimination between hadronic and electromagnetic cascades are required on a large dynamic range. The ECAL performances were checked by exposing the engineering model to a test beam at CERN in July 2002.

  6. Performance Studies of Prototype II for the CASTOR forward Calorimeter at the CMS Experiment

    CERN Document Server

    Aslanoglou, Xenofon; Cerci, Salim; Cyz, Antoni; D'Enterria, David; Gladysz-Dziadus, Ewa; Gouskos, Loukas; Ivashkin, Alesandr; Kalfas, Costas; Katsas, Panagiotis; Kuznetsov, Andrey; Musienko, Yuri; Panagiotou, Apostolos; Vlassov, E

    2007-01-01

    We present results of the performance of the second prototype of the CASTOR quartz-tungsten sampling calorimeter, to be installed in the very forward region of the CMS experiment at the LHC. The energy linearity and resolution, as well as the spatial resolution of the prototype to electromagnetic and hadronic showers are studied with E=20-200 GeV electrons, E=20-350 GeV pions, and E=50,150 GeV muons from beam tests carried out at CERN/SPS in 2004. The responses of the calorimeter using two different types of photodetectors (avalanche photodiodes APDs, and photomultiplier tubes PMTs) are compared.

  7. Performance of the first prototype of the CALICE scintillator strip electromagnetic calorimeter

    CERN Document Server

    Francis, K.; Schlereth, J.; Smith, J.; Xia, L.; Baldolemar, E.; Li, J.; Park, S.T.; Sosebee, M.; White, A.P.; Yu, J.; Eigen, G.; Mikami, Y.; Watson, N.K.; Thomson, M.A.; Ward, D.R.; Benchekroun, D.; Hoummada, A.; Khoulaki, Y.; Apostolakis, J.; Dotti, A.; Folger, G.; Ivantchenko, V.; Ribon, A.; Uzhinskiy, V.; Carloganu, C.; Gay, P.; Manen, S.; Royer, L.; Tytgat, M.; Zaganidis, N.; Blazey, G.C.; Dyshkant, A.; Lima, J.G.R.; Zutshi, V.; Hostachy, J. -Y.; Morin, L.; Cornett, U.; David, D.; Ebrahimi, A.; Falley, G.; Gadow, K.; Goettlicher, P.; Guenter, C.; Hartbrich, O.; Hermberg, B.; Karstensen, S.; Krivan, F.; Krueger, K.; Lutz, B.; Morozov, S.; Morgunov, V.; Neubueser, C.; Reinecke, M.; Sefkow, F.; Smirnov, P.; Terwort, M.; Garutti, E.; Laurien, S.; Lu, S.; Marchesini, I.; Matysek, M.; Ramilli, M.; Briggl, K.; Eckert, P.; Harion, T.; Schultz-Coulon, H. -Ch.; Shen, W.; Stamen, R.; Bilki, B.; Norbeck, E.; Northacker, D.; Onel, Y.; Wilson, G.W.; Kawagoe, K.; Sudo, Y.; Yoshioka, T.; Dauncey, P.D.; Wing, M.; Salvatore, F.; Cortina Gil, E.; Mannai, S.; Baulieu, G.; Calabria, P.; Caponetto, L.; Combaret, C.; Della Negra, R.; Grenier, G.; Han, R.; Ianigro, J-C.; Kieffer, R.; Laktineh, I.; Lumb, N.; Mathez, H.; Mirabito, L.; Petrukhin, A.; Steen, A.; Tromeur, W.; Vander donckt, M.; Zoccarato, Y.; Calvo Alamillo, E.; Fouz, M.-C.; Puerta-Pelayo, J.; Corriveau, F.; Bobchenko, B.; Chadeeva, M.; Danilov, M.; Epifantsev, A.; Markin, O.; Mizuk, R.; Novikov, E.; Popov, V.; Rusinov, V.; Tarkovsky, E.; Besson, D.; Buzhan, P.; Ilyin, A.; Kantserov, V.; Kaplin, V.; Karakash, A.; Popova, E.; Tikhomirov, V.; Kiesling, C.; Seidel, K.; Simon, F.; Soldner, C.; Weuste, L.; Amjad, M.S.; Bonis, J.; Callier, S.; Conforti di Lorenzo, S.; Cornebise, P.; Doublet, Ph.; Dulucq, F.; Fleury, J.; Frisson, T.; van der Kolk, N.; Li, H.; Martin-Chassard, G.; Richard, F.; de la Taille, Ch.; Poeschl, R.; Raux, L.; Rouene, J.; Seguin-Moreau, N.; Anduze, M.; Balagura, V.; Boudry, V.; Brient, J-C.; Cornat, R.; Frotin, M.; Gastaldi, F.; Guliyev, E.; Haddad, Y.; Magniette, F.; Musat, G.; Ruan, M.; Tran, T.H.; Videau, H.; Bulanek, B.; Zacek, J.; Cvach, J.; Gallus, P.; Havranek, M.; Janata, M.; Kvasnicka, J.; Lednicky, D.; Marcisovsky, M.; Polak, I.; Popule, J.; Tomasek, L.; Tomasek, M.; Ruzicka, P.; Sicho, P.; Smolik, J.; Vrba, V.; Zalesak, J.; Belhorma, B.; Ghazlane, H.; Kotera, K.; Ono, H.; Takeshita, T.; Uozumi, S.; Jeans, D.; Chang, S.; Khan, A.; Kim, D.H.; Kong, D.J.; Oh, Y.D.; Goetze, M.; Sauer, J.; Weber, S.; Zeitnitz, C.

    2014-01-01

    A first prototype of a scintillator strip-based electromagnetic calorimeter was built, consisting of 26 layers of tungsten absorber plates interleaved with planes of 45x10x3 mm3 plastic scintillator strips. Data were collected using a positron test beam at DESY with momenta between 1 and 6 GeV/c. The prototype's performance is presented in terms of the linearity and resolution of the energy measurement. These results represent an important milestone in the development of highly granular calorimeters using scintillator strip technology. This technology is being developed for a future linear collider experiment, aiming at the precise measurement of jet energies using particle flow techniques.

  8. ELECTROMAGNETIC CALORIMETER (ECAL)

    CERN Multimedia

    P. Bloch

    ECAL crystal calorimeter (EB + EE) The Barrel and Endcaps ECAL calorimeters have been used routinely in global runs. The CRAFT data have confirmed that ECAL performance is the same with or without magnetic field. The CRUZET and CRAFT runs have allowed experience to be gained with ECAL operation in many areas, in particular for the trigger and the calibration sequence using gap events (laser events and LED pulsing). More details can be found in the Commissioning/DPG report in this bulletin.   The last components remaining to be installed and commissioned are the specific Endcap Trigger modules (TCC-48). Most of the modules have been delivered to LLR and half of them are already at CERN. In parallel, large progress has been made on the validation of the TCC-48 firmware. Preshower (ES) The Preshower project has also made impressive progress during Autumn. All the elements required to complete the detector assembly are at hand. Ladder assembly, test and calibration with cosmic rays at the operating ...

  9. The Optical Instrumentation of the ATLAS Tile Calorimeter

    CERN Document Server

    Abdallah, J; Alexa, C; Alves, R; Amaral, P; Ananiev, A; Anderson, K; Andresen, X; Antonaki, A; Batusov, V; Bednar, P; Bergeaas, E; Biscarat, C; Blanch, O; Blanchot, G; Bohm, C; Boldea, V; Bosi, F; Bosman, M; Bromberg, C; Budagov, Yu A; Calvet, D; Cardeira, C; Carli, T; Carvalho, J; Cascella, M; Castillo, M V; Costelo, J; Cavalli-Sforza, M; Cavasinni, V; Cerqueira, A S; Clément, C; Cobal, M; Cogswell, F; Constantinescu, S; Costanzo, D; Da Silva, P; David, M; Davidek, T; Dawson, J; De, K; Del Prete, T; Diakov, E; Di Girolamo, B; Dita, S; Dolejsi, J; Dolezal, Z; Dotti, A; Downing, R; Drake, G; Efthymiopoulos, I; Errede, D; Errede, S; Farbin, A; Fassouliotis, D; Feng, E; Fenyuk, A; Ferdi, C; Ferreira, B C; Ferrer, A; Flaminio, V; Flix, J; Francavilla, P; Fullana, E; Garde, V; Gellerstedt, K; Giakoumopoulou, V; Giangiobbe, V; Gildemeister, O; Gilewsky, V; Giokaris, N; Gollub, N; Gomes, A; González, V; Gouveia, J; Grenier, P; Gris, P; Guarino, V; Guicheney, C; Sen-Gupta, A; Hakobyan, H; Haney, M; Hellman, S; Henriques, A; Higón, E; Hill, N; Holmgren, S; Hruska, I; Hurwitz, M; Huston, J; Jen-La Plante, I; Jon-And, K; Junk, T; Karyukhin, A; Khubua, J; Klereborn, J; Konsnantinov, V; Kopikov, S; Korolkov, I; Krivkova, P; Kulchitsky, Y; Kurochkin, Yu; Kuzhir, P; Lapin, V; Le Compte, T; Lefèvre, R; Leitner, R; Li, J; Liablin, M; Lokajícek, M; Lomakin, Y; Lourtie, P; Lovas, L; Lupi, A; Maidantchik, C; Maio, A; Maliukov, S; Manousakis, A; Marques, C; Marroquim, F; Martin, F; Mazzoni, E; Merritt, F S; Myagkov, A; Miller, R; Minashvili, I; Miralles, L; Montarou, G; Némécek, S; Nessi, M; Nikitine, I; Nodulman, L; Norniella, O; Onofre, A; Oreglia, M; Palan, B; Pallin, D; Pantea, D; Pereira, A; Pilcher, J E; Pina, J; Pinhão, J; Pod, E; Podlyski, F; Portell, X; Poveda, J; Pribyl, L; Price, L E; Proudfoot, J; Ramalho, M; Ramstedt, M; Raposeiro, L; Reis, J; Richards, R; Roda, C; Romanov, V; Rosnet, R; Roy, P; Ruiz, A; Rumiantsau, V; Russakovich, N; Sada Costa, J; Salto, O; Salvachúa, B; Sanchis, E; Sanders, H; Santoni, C; Santos, J; Saraiva, J G; Sarri, F; Says, L P; Schlager, G; Schlereth, J L; Seixas, J M; Selldén, B; Shalanda, N; Shevtsov, P; Shochet, M; Silva, J; Simaitis, V; Simonyan, M; Sisakian, A; Sjölin, J; Solans, C; Solodkov, A; Solovyanov, O; Sosebee, M; Spanó, F; Speckmeyer, P; Stanek, R; Starchenko, E; Starovoitov, P; Suk, M; Sykora, I; Tang, F; Tas, P; Teuscher, R; Tischenko, M; Tokar, S; Topilin, N; Torres, J; Underwood, D; Usai, G; Valero, A; Valkár, S; Valls, J A; Vartapetian, A; Vazielle, F; Vellidis, C; Ventura, F; Vichou, I; Vivarelli, I; Volpi, M; White, A; Zaitsev, A; Zaytsev, Yu; Zenin, A; Zenis, T; Zenonos, Z; Zenz, S; Zilka, B

    2013-01-01

    The purpose of this Note is to describe the optical assembly procedure called here Optical Instrumentation and the quality tests conducted on the assembled units. Altogether, 65 Barrel (or LB) modules were constructed - including one spare - together with 129 Extended Barrel (EB) modules (including one spare). The LB modules were mechanically assembled at JINR (Dubna, Russia) and transported to CERN, where the optical instrumentation was performed with personnel contributed by several Institutes. The modules composing one of the two Extended Barrels (known as EBA) were mechanically assembled in the USA, and instrumented in two US locations (ANL, U. of Michigan), while the modules of the other Extended barrel (EBC) were assembled in Spain and instrumented at IFAE (Barcelona). Each of the EB modules includes a subassembly known as ITC that contributes to the hermeticity of the calorimeter; all ITCs were assembled at UTA (Texas), and mounted onto the module mechanical structures at the EB mechanical assembly loc...

  10. First Test of the Performance of CMS Muon Chambers inside the Barrel Yoke

    CERN Document Server

    Jacobi, Emanuel

    2008-01-01

    The Compact Muon Solenoid (CMS) is a multi purpose experimental particle detector at the Large Hardon Collider (LHC). The goal of this experiment is to do fundamental research in particle physics and in particular to prove the validity of the Higgs model. The CMS muon barrel system provides a precise measurement of the position and the momentum of high energy muons. It consists of 250 drift tube chambers, with rectangular drift cells filled with a gas mixture of 85% Ar and 15%CO$_{2}$. Each chamber is equipped with on-chamber readout and trigger electronics. The chambers for the innermost station have been produced at the Physics Institute IIIA at the RWTH University. After installing the chambers at their final position inside the barrel return yoke for the CMS solenoid magnet, cosmic muons have been recorded individually for all chambers and used to evaluate the detector performance, as this is the last chance to easily access the chambers for hardware interventions. These data also provide a good opportuni...

  11. Performance of the ATLAS Tile Hadronic Calorimeter at LHC in Run I and planned upgrades

    CERN Document Server

    Solovyanov, Oleg; The ATLAS collaboration

    2014-01-01

    The Tile Calorimeter (TileCal) is the central section of the ATLAS hadronic calorimeter at the Large Hadron Collider, a key detector for the measurements of hadrons, jets tau leptons and missing transverse energy. Scintillation light produced in the tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The resulting electronic signals from approximately 10000 PMTs are measured and digitized before being transferred to off-detector data-acquisition systems. After an initial setting of the absolute energy scale in test beams with particles of well-defined momentum, the calibrated scale was transferred to the rest of the detector via the response to radioactive sources. The calibrated scale was validated in situ with muons and single hadrons and the timing performance with muons and jets as detailed in this contribution. The data quality procedures used during the LHC data-taking and the evolution of the detector status are exposed. The energy and the time reconstruction performance...

  12. Construction and tests of the Atlas barrel pre sampler and study of the photon/pion rejection in the electromagnetic calorimeter; Realisation du pre-echantillonneur central d'ATLAS et etude de la separation {gamma}/{pi}{sup 0} dans le calorimetre electromagnetique

    Energy Technology Data Exchange (ETDEWEB)

    Saboumazrag, S

    2004-02-01

    ATLAS is one of the detectors which will equip the future proton-proton collider LHC at CERN. The main motivation for the ATLAS experiment is the quest for the Higgs boson. The observation of this particle would be an important step in the understanding of particle physics in the context of the standard model, with or without supersymmetry. This thesis aims to present the construction of the barrel pre-sampler which will equip the front face of the ATLAS electromagnetic calorimeter. The construction and tests of sectors were achieved at the Laboratory of Subatomic Physics and Cosmology of Grenoble. Two of these sectors were mounted on one module of the electromagnetic calorimeter and tested with electron, photon and muon beams at CERN. I participated in these tests and analysed the data. The results were compared to a Monte-Carlo simulation GEANT3. One of the difficulties lies in the necessity to discard photons coming from {pi}{sup 0} {yields} {gamma}{gamma} events because they can be mistaken for photons released in gamma channels of Higgs boson decay. In the mass range spreading from 95 MeV to 150 MeV, H{sup 0} {yields} {gamma}{gamma} is the most adequate process to detect the Higgs boson. A study of the discard parameter {gamma}/{pi}{sup 0} has been performed. For a photon detection efficiency of 90%, the average discard parameter has been assessed to be 2.5 which is slightly lower than the value given by the simulation.

  13. Software studies of GLD calorimeter

    Indian Academy of Sciences (India)

    H Matsunaga

    2007-12-01

    The baseline design of the GLD calorimeter is scintillator-strip arrays interleaved with absorber plates. We present preliminary performance studies of the hit clustering with this calorimeter using a simulator. Also, simulation results of a `digital' calorimeter, which is an option of the GLD calorimeter, are presented.

  14. 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.

  15. Performance of the Tile PreProcessor Demonstrator for the ATLAS Tile Calorimeter Phase II Upgrade

    CERN Document Server

    Carrio Argos, Fernando; The ATLAS collaboration

    2015-01-01

    The Tile Calorimeter PreProcessor (TilePPr) demonstrator is a high performance double AMC board based on FPGA resources and QSFP modules. This board has been designed in the framework of the ATLAS Tile Calorimeter (TileCal) Demonstrator Project for the Phase II Upgrade as the first stage of the back-end electronics. The TilePPr demonstrator has been conceived for receiving and processing the data coming from the front-end electronics of the TileCal Demonstrator module, as well as for configuring it. Moreover, the TilePPr demonstrator handles the communication with the Detector Control System to monitor and control the front-end electronics. The TilePPr demonstrator represents 1/8 of the final TilePPr that will be designed and installed into the detector for the ATLAS Phase II Upgrade.

  16. Performance of the TilePPr demonstrator for the ATLAS Tile Calorimeter Phase II Upgrade

    CERN Document Server

    Carrio Argos, Fernando; The ATLAS collaboration

    2015-01-01

    The Tile Calorimeter Pre-processor (TilePPr) demonstrator is a high performance double AMC board based on FPGA resources and QSFP modules. This board has been designed in the framework of the ATLAS Tile Calorimeter (TileCal) Demonstrator Project for the Phase II Upgrade as the first stage of the off-detector electronics. The TilePPr demonstrator has been conceived for receiving and processing the data coming from the on-detector electronics of the TileCal Demonstrator module, as well as for configuring it. Moreover, the TilePPr demonstrator handles the communication with the Detector Control System to monitor and control the on-detector electronics.

  17. Performance of the ATLAS Calorimeters in LHC Run-1 and Run-2

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00354209; The ATLAS collaboration

    2016-01-01

    The ATLAS experiment at the Large Hadron Collider (LHC) is equipped with electromagnetic and hadronic liquid-argon (LAr) calorimeters and a hadronic scintillator-steel sampling calorimeter (TileCal) for measuring energy and direction of final state particles in the pseudorapidity range $|\\eta|<4.9$. The calibration and performance of the calorimetry system was established through beam tests, cosmic ray muon measurements and in particular the first three years of pp collision data-taking. During this period, referred to as Run-1, approximately 27~\\ifb of proton-proton collision data were collected at the center-of-mass energies of 7 and 8~TeV. Following a period of detector consolidation during a long shutdown, Run-2 started in 2015 with approximately 3.9~\\ifb of data at a center-of-mass energy of 13~TeV recorded in the first year. We present a summary of the calorimeter operation, monitoring and data quality, as well as their performance, including the calibration and stability of the electromagnetic scale...

  18. Performance of the ATLAS Calorimeters in LHC Run-1 and Run-2

    CERN Document Server

    Burghgrave, Blake; The ATLAS collaboration

    2016-01-01

    The ATLAS experiment at the Large Hadron Collider (LHC) is equipped with electromagnetic and hadronic liquid-argon (LAr) calorimeters and a hadronic scintillator-steel sampling calorimeter (TileCal) for measuring energy and direction of final state particles in the pseudorapidity range |η|<4.9. The calibration and performance of the calorimetry system was established during beam tests, cosmic ray muon measurements and in particular the first three years of pp collision data-taking. During this period, referred to as Run-1, approximately 27~fb−1 of data have been collected at the center-of-mass energies of 7 and 8~TeV. Following a period of detector consolidation during a long shutdown, Run-2 started in 2015 with approximately 3.9~fb−1 of data at a center-of-mass energy of 13~TeV recorded in this year. Results on the calorimeter operation, monitoring and data quality, as well as their performance will be presented, including the calibration and stability of the electromagnetic scale, response uniformit...

  19. Timing calibration and performance of the ATLAS Level-1 calorimeter trigger

    Energy Technology Data Exchange (ETDEWEB)

    Antel, Claire [Universitaet Heidelberg, Heidelberg (Germany)

    2016-07-01

    The level-1 calorimeter (L1Calo) trigger is part of the first, and fastest-working, stage of online event selection at the ATLAS experiment at CERN. The system is required to process analogue signals, so-called trigger towers, from the calorimeter and identify and count particle candidates as well as missing and total transverse energy above configurable energy thresholds. The final acceptance decision is subsequently made by the central trigger processor using the combined information sent by all level-1 systems. The entire process is limited to 2.5 microseconds. One of the many aspects of the commissioning and performance checks of the ATLAS calorimeter trigger to ensure correct functionality is the input timing of the trigger tower signals. Signals, once received by L1Calo, have undergone several delays - time-of-flight delays as well as cable delays - and are different for each trigger tower. It is essential to synchronise the system so that signals from the same collision arrive simultaneously and the correct bunch crossing can thus be identified. Further fine-tuning of the signal delay, of 1 nanosecond precision, ensures that pulses are digitised at the pulse peak for optimum energy resolution. The procedure for the timing commissioning and findings in performance for Run 2 of the LHC are hereby presented.

  20. Performance and Mechanical Tolerances Achieved with a Full Size Prototype of a CMS Barrel Muon Drift Tubes Chamber

    CERN Document Server

    Bethke, Siegfried; Benettoni, Massimo; Benvenuti, Alberto; Berdugo, Javier; Cerrada, Marcos; Colino, Nicanor; Conti, Enrico; Dallavalle, Gaetano-Marco; Daniel, Manuel; De Giorgi, Marco; De Min, Alberto; Dosselli, Umberto; Fanin, Claudio; Fouz-Iglesias, M C; Gasparini, Fabrizio; Gasparini, Ugo; Giantin, R; Grandi, Claudio; Guaita, Paola; Guerzoni, Marco; Ladrón de Guevara, Pedro; Lippi, Ivano; Marcellini, Stefano; Martinelli, Roberto; Meneguzzo, Anna Teresa; Mocholí-Mocholí, J; Montanari, Alessandro; Montanari, Christian; Navarria, Francesco; Odorici, Fabrizio; Reithler, Hans; Romero, Luciano; Rossi, Antonio; Rovelli, Tiziano; Schwarthoff, Hubert; Sondermann, Volker; Tano, Valeria; Teykal, Helmut; Tutas, Joerg; Van den Hirtz, J; Wagner, H; Wegner, Martin; Willmott, Carlos

    1998-01-01

    The barrel muon chambers of the CMS experiment are made assembling 3 independent modules ( SuperLayers) which together measure the impact point and the angles theta and phi. Each SuperLayer consists of four layers of rectangular Drift Tubes. MB96 is a full size prototype of the smallest CMS Barrel Muon Chamber ( MB1) built in early 1997 at the Legnaro INFN laboratory and tested in summer 1997 at the CERN CMS test beam facility. The performance of the prototype and the mechanical tolerances achieved in the construction are presented.

  1. Performance Test of the First Prototype of 2 Ways Video Camera for the Muon Barrel Position Monitor

    CERN Document Server

    Brunel, Laurent; Bondar, Tamas; Bencze, Gyorgy; Raics, Peter; Szabó, Jozsef

    1998-01-01

    The CMS Barrel Position Monitor is based on 360 video cameras mounted on 36 very stable mechanical structures. One type of camera is used to observe optical sources mounted on the muon chambers. A first prototype was produced to test the main performances. This report gives the experimental results about stability, linearity and temperature effects.

  2. ATLAS level-1 calorimeter trigger: Run-2 performance and Phase-1 upgrades

    Science.gov (United States)

    Carlson, Ben; Hong, Tae Min; Atlas Collaboration

    2017-01-01

    The Run-2 performance and Phase-1 upgrade are presented for the hardware-based level-1 calorimeter trigger (L1Calo) for the ATLAS Experiment. This trigger has a latency of about 2.2 microseconds to make a decision to help ATLAS select about 100 kHz of the most interesting collisions from the nominal LHC rate of 40 MHz. We summarize the upgrade after Run-1 (2009-2012) and discuss its performance in Run-2 (2015-current). We also outline the on-going Phase-1 upgrade for the next run (2021-2024) and its expected performance.

  3. Readiness of the ATLAS liquid argon calorimeter for LHC collisions

    Science.gov (United States)

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W.; Hughes, G.; Hughes-Jones, R. E.; Hurst, P.; Hurwitz, M.; Husemann, U.; Huseynov, N.; Huston, J.; Huth, J.; Iacobucci, G.; Iakovidis, G.; Ibragimov, I.; Iconomidou-Fayard, L.; Idarraga, J.; Iengo, P.; Igonkina, O.; Ikegami, Y.; Ikeno, M.; Ilchenko, Y.; Iliadis, D.; Ilyushenka, Y.; Imori, M.; Ince, T.; Ioannou, P.; Iodice, M.; Irles Quiles, A.; Ishikawa, A.; Ishino, M.; Ishmukhametov, R.; Isobe, T.; Issakov, V.; Issever, C.; Istin, S.; Itoh, Y.; Ivashin, A. V.; Iwanski, W.; Iwasaki, H.; Izen, J. M.; Izzo, V.; Jackson, J. N.; Jackson, P.; Jaekel, M.; Jahoda, M.; Jain, V.; Jakobs, K.; Jakobsen, S.; Jakubek, J.; Jana, D.; Jansen, E.; Jantsch, A.; Janus, M.; Jared, R. C.; Jarlskog, G.; Jarron, P.; Jeanty, L.; Jelen, K.; Jen-La Plante, I.; Jenni, P.; Jez, P.; Jézéquel, S.; Ji, W.; Jia, J.; Jiang, Y.; Jimenez Belenguer, M.; Jin, G.; Jin, S.; Jinnouchi, O.; Joffe, D.; Johansen, M.; Johansson, K. E.; Johansson, P.; Johnert, S.; Johns, K. A.; Jon-And, K.; Jones, G.; Jones, R. W. L.; Jones, T. W.; Jones, T. J.; Jonsson, O.; Joos, D.; Joram, C.; Jorge, P. M.; Juranek, V.; Jussel, P.; Kabachenko, V. V.; Kabana, S.; Kaci, M.; Kaczmarska, A.; Kado, M.; Kagan, H.; Kagan, M.; Kaiser, S.; Kajomovitz, E.; Kalinovskaya, L. V.; Kalinowski, A.; Kama, S.; Kanaya, N.; Kaneda, M.; Kantserov, V. A.; Kanzaki, J.; Kaplan, B.; Kapliy, A.; Kaplon, J.; Karagounis, M.; Karagoz Unel, M.; Kartvelishvili, V.; Karyukhin, A. N.; Kashif, L.; Kasmi, A.; Kass, R. D.; Kastanas, A.; Kastoryano, M.; Kataoka, M.; Kataoka, Y.; Katsoufis, E.; Katzy, J.; Kaushik, V.; Kawagoe, K.; Kawamoto, T.; Kawamura, G.; Kayl, M. S.; Kayumov, F.; Kazanin, V. A.; Kazarinov, M. Y.; Kazi, S. I.; Keates, J. R.; Keeler, R.; Keener, P. T.; Kehoe, R.; Keil, M.; Kekelidze, G. D.; Kelly, M.; Kennedy, J.; Kenyon, M.; Kepka, O.; Kerschen, N.; Kerševan, B. P.; Kersten, S.; Kessoku, K.; Khakzad, M.; Khalil-Zada, F.; Khandanyan, H.; Khanov, A.; Kharchenko, D.; Khodinov, A.; Kholodenko, A. G.; Khomich, A.; Khoriauli, G.; Khovanskiy, N.; Khovanskiy, V.; Khramov, E.; Khubua, J.; Kilvington, G.; Kim, H.; Kim, M. S.; Kim, P. C.; Kim, S. H.; Kind, O.; Kind, P.; King, B. T.; Kirk, J.; Kirsch, G. P.; Kirsch, L. E.; Kiryunin, A. E.; Kisielewska, D.; Kittelmann, T.; Kiyamura, H.; Kladiva, E.; Klein, M.; Klein, U.; Kleinknecht, K.; Klemetti, M.; Klier, A.; Klimentov, A.; Klingenberg, R.; Klinkby, E. B.; Klioutchnikova, T.; Klok, P. F.; Klous, S.; Kluge, E.-E.; Kluge, T.; Kluit, P.; Klute, M.; Kluth, S.; Knecht, N. S.; Kneringer, E.; Ko, B. R.; Kobayashi, T.; Kobel, M.; Koblitz, B.; Kocian, M.; Kocnar, A.; Kodys, P.; Köneke, K.; König, A. C.; Köpke, L.; Koetsveld, F.; Koevesarki, P.; Koffas, T.; Koffeman, E.; Kohn, F.; Kohout, Z.; Kohriki, T.; Kokott, T.; Kolanoski, H.; Kolesnikov, V.; Koletsou, I.; Koll, J.; Kollar, D.; Kolos, S.; Kolya, S. D.; Komar, A. A.; Komaragiri, J. R.; Kondo, T.; Kono, T.; Kononov, A. I.; Konoplich, R.; Konovalov, S. P.; Konstantinidis, N.; Koperny, S.; Korcyl, K.; Kordas, K.; Koreshev, V.; Korn, A.; Korolkov, I.; Korolkova, E. V.; Korotkov, V. A.; Kortner, O.; Kostka, P.; Kostyukhin, V. V.; Kotamäki, M. J.; Kotov, S.; Kotov, V. M.; Kotov, K. Y.; Koupilova, Z.; Kourkoumelis, C.; Koutsman, A.; Kowalewski, R.; Kowalski, H.; Kowalski, T. Z.; Kozanecki, W.; Kozhin, A. S.; Kral, V.; Kramarenko, V. A.; Kramberger, G.; Krasny, M. W.; Krasznahorkay, A.; Kreisel, A.; Krejci, F.; Krepouri, A.; Kretzschmar, J.; Krieger, P.; Krobath, G.; Kroeninger, K.; Kroha, H.; Kroll, J.; Kroseberg, J.; Krstic, J.; Kruchonak, U.; Krüger, H.; Krumshteyn, Z. V.; Kubota, T.; Kuehn, S.; Kugel, A.; Kuhl, T.; Kuhn, D.; Kukhtin, V.; Kulchitsky, Y.; Kuleshov, S.; Kummer, C.; Kuna, M.; Kupco, A.; Kurashige, H.; Kurata, M.; Kurchaninov, L. L.; Kurochkin, Y. A.; Kus, V.; Kuykendall, W.; Kuznetsova, E.; Kvasnicka, O.; Kwee, R.; La Rosa, M.; La Rotonda, L.; Labarga, L.; Labbe, J.; Lacasta, C.; Lacava, F.; Lacker, H.; Lacour, D.; Lacuesta, V. R.; Ladygin, E.; Lafaye, R.; Laforge, B.; Lagouri, T.; Lai, S.; Lamanna, M.; Lampen, C. L.; Lampl, W.; Lancon, E.; Landgraf, U.; Landon, M. P. J.; Lane, J. L.; Lankford, A. J.; Lanni, F.; Lantzsch, K.; Lanza, A.; Laplace, S.; Lapoire, C.; Laporte, J. F.; Lari, T.; Larionov, A. V.; Larner, A.; Lasseur, C.; Lassnig, M.; Laurelli, P.; Lavrijsen, W.; Laycock, P.; Lazarev, A. B.; Lazzaro, A.; Le Dortz, O.; Le Guirriec, E.; Le Maner, C.; Le Menedeu, E.; Le Vine, M.; Leahu, M.; Lebedev, A.; Lebel, C.; Lecompte, T.; Ledroit-Guillon, F.; Lee, H.; Lee, J. S. H.; Lee, S. C.; Lefebvre, M.; Legendre, M.; Legeyt, B. C.; Legger, F.; Leggett, C.; Lehmacher, M.; Lehmann Miotto, G.; Lei, X.; Leitner, R.; Lelas, D.; Lellouch, D.; Lellouch, J.; Leltchouk, M.; Lendermann, V.; Leney, K. J. C.; Lenz, T.; Lenzen, G.; Lenzi, B.; Leonhardt, K.; Leroy, C.; Lessard, J.-R.; Lester, C. G.; Leung Fook Cheong, A.; Levêque, J.; Levin, D.; Levinson, L. J.; Levitski, M. S.; Levonian, S.; Lewandowska, M.; Leyton, M.; Li, H.; Li, J.; Li, S.; Li, X.; Liang, Z.; Liang, Z.; Liberti, B.; Lichard, P.; Lichtnecker, M.; Lie, K.; Liebig, W.; Liko, D.; Lilley, J. N.; Lim, H.; Limosani, A.; Limper, M.; Lin, S. C.; Lindsay, S. W.; Linhart, V.; Linnemann, J. T.; Liolios, A.; Lipeles, E.; Lipinsky, L.; Lipniacka, A.; Liss, T. M.; Lissauer, D.; Litke, A. M.; Liu, C.; Liu, D.; Liu, H.; Liu, J. B.; Liu, M.; Liu, S.; Liu, T.; Liu, Y.; Livan, M.; Lleres, A.; Lloyd, S. L.; Lobodzinska, E.; Loch, P.; Lockman, W. S.; Lockwitz, S.; Loddenkoetter, T.; Loebinger, F. K.; Loginov, A.; Loh, C. W.; Lohse, T.; Lohwasser, K.; Lokajicek, M.; Loken, J.; Lopes, L.; Lopez Mateos, D.; Losada, M.; Loscutoff, P.; Losty, M. J.; Lou, X.; Lounis, A.; Loureiro, K. F.; Lovas, L.; Love, J.; Love, P.; Lowe, A. J.; Lu, F.; Lu, J.; Lubatti, H. J.; Luci, C.; Lucotte, A.; Ludwig, A.; Ludwig, D.; Ludwig, I.; Ludwig, J.; Luehring, F.; Luisa, L.; Lumb, D.; Luminari, L.; Lund, E.; Lund-Jensen, B.; Lundberg, B.; Lundberg, J.; Lundquist, J.; Lutz, G.; Lynn, D.; Lys, J.; Lytken, E.; Ma, H.; Ma, L. L.; Maccarrone, G.; Macchiolo, A.; Maček, B.; Miguens, J. Machado; Mackeprang, R.; Madaras, R. J.; Mader, W. F.; Maenner, R.; Maeno, T.; Mättig, P.; Mättig, S.; Magalhaes Martins, P. J.; Magradze, E.; Magrath, C. A.; Mahalalel, Y.; Mahboubi, K.; Mahmood, A.; Mahout, G.; Maiani, C.; Maidantchik, C.; Maio, A.; Majewski, S.; Makida, Y.; Makouski, M.; Makovec, N.; Malecki, Pa.; Malecki, P.; Maleev, V. P.; Malek, F.; Mallik, U.; Malon, D.; Maltezos, S.; Malyshev, V.; Malyukov, S.; Mambelli, M.; Mameghani, R.; Mamuzic, J.; Manabe, A.; Mandelli, L.; Mandić, I.; Mandrysch, R.; Maneira, J.; Mangeard, P. S.; Manjavidze, I. D.; Manousakis-Katsikakis, A.; Mansoulie, B.; Mapelli, A.; Mapelli, L.; March, L.; Marchand, J. F.; Marchese, F.; Marcisovsky, M.; Marino, C. P.; Marques, C. N.; Marroquim, F.; Marshall, R.; Marshall, Z.; Martens, F. K.; Marti I Garcia, S.; Martin, A. J.; Martin, A. J.; Martin, B.; Martin, B.; Martin, F. F.; Martin, J. P.; Martin, T. A.; Martin Dit Latour, B.; Martinez, M.; Martinez Outschoorn, V.; Martini, A.; Martynenko, V.; Martyniuk, A. C.; Maruyama, T.; Marzano, F.; Marzin, A.; Masetti, L.; Mashimo, T.; Mashinistov, R.; Masik, J.; Maslennikov, A. L.; Massaro, G.; Massol, N.; Mastroberardino, A.; Masubuchi, T.; Mathes, M.; Matricon, P.; Matsumoto, H.; Matsunaga, H.; Matsushita, T.; Mattravers, C.; Maxfield, S. J.; May, E. N.; Mayne, A.; Mazini, R.; Mazur, M.; Mazzanti, M.; Mazzanti, P.; Mc Donald, J.; Mc Kee, S. P.; McCarn, A.; McCarthy, R. L.; McCubbin, N. A.; McFarlane, K. W.; McGlone, H.; McHedlidze, G.; McLaren, R. A.; McMahon, S. J.; McMahon, T. R.; McPherson, R. A.; Meade, A.; Mechnich, J.; Mechtel, M.; Medinnis, M.; Meera-Lebbai, R.; Meguro, T. M.; Mehdiyev, R.; Mehlhase, S.; Mehta, A.; Meier, K.; Meirose, B.; Melamed-Katz, A.; Mellado Garcia, B. R.; Meng, Z.; Menke, S.; Meoni, E.; Merkl, D.; Mermod, P.; Merola, L.; Meroni, C.; Merritt, F. S.; Messina, A. M.; Messmer, I.; Metcalfe, J.; Mete, A. S.; Meyer, J.-P.; Meyer, J.; Meyer, T. C.; Meyer, W. T.; Miao, J.; Micu, L.; Middleton, R. P.; Migas, S.; Mijović, L.; Mikenberg, G.; Mikuž, M.; Miller, D. W.; Mills, W. J.; Mills, C. M.; Milov, A.; Milstead, D. A.; Minaenko, A. A.; Miñano, M.; Minashvili, I. A.; Mincer, A. I.; Mindur, B.; Mineev, M.; Mir, L. M.; Mirabelli, G.; Misawa, S.; Miscetti, S.; Misiejuk, A.; Mitrevski, J.; Mitsou, V. A.; Miyagawa, P. S.; Mjörnmark, J. U.; Mladenov, D.; Moa, T.; Mockett, P.; Moed, S.; Moeller, V.; Mönig, K.; Möser, N.; Mohn, B.; Mohr, W.; Mohrdieck-Möck, S.; Moles-Valls, R.; Molina-Perez, J.; Moloney, G.; Monk, J.; Monnier, E.; Montesano, S.; Monticelli, F.; Moore, R. W.; Herrera, C. 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O.; Osculati, B.; Osuna, C.; Otec, R.; P Ottersbach, J.; Ould-Saada, F.; Ouraou, A.; Ouyang, Q.; Owen, M.; Owen, S.; Ozcan, V. E.; Ozone, K.; Ozturk, N.; Pacheco Pages, A.; Padhi, S.; Padilla Aranda, C.; Paganis, E.; Pahl, C.; Paige, F.; Pajchel, K.; Pal, A.; Palestini, S.; Pallin, D.; Palma, A.; Palmer, J. D.; Pan, Y. B.; Panagiotopoulou, E.; Panes, B.; Panikashvili, N.; Panitkin, S.; Pantea, D.; Panuskova, M.; Paolone, V.; Papadopoulou, Th. D.; Park, S. J.; Park, W.; Parker, M. A.; Parker, S. I.; Parodi, F.; Parsons, J. A.; Parzefall, U.; Pasqualucci, E.; Passardi, G.; Passeri, A.; Pastore, F.; Pastore, Fr.; Pásztor, G.; Pataraia, S.; Pater, J. R.; Patricelli, S.; Patwa, A.; Pauly, T.; Peak, L. S.; Pecsy, M.; Pedraza Morales, M. I.; Peleganchuk, S. V.; Peng, H.; Penson, A.; Penwell, J.; Perantoni, M.; Perez, K.; Perez Codina, E.; Pérez García-Estañ, M. T.; Perez Reale, V.; Perini, L.; Pernegger, H.; Perrino, R.; Perrodo, P.; Persembe, S.; Perus, P.; Peshekhonov, V. D.; Petersen, B. A.; Petersen, J.; Petersen, T. C.; Petit, E.; Petridou, C.; Petrolo, E.; Petrucci, F.; Petschull, D.; Petteni, M.; Pezoa, R.; Pfeifer, B.; Phan, A.; Phillips, A. W.; Piacquadio, G.; Piccinini, M.; Piegaia, R.; Pilcher, J. E.; Pilkington, A. D.; Pina, J.; Pinamonti, M.; Pinfold, J. L.; Ping, J.; Pinto, B.; Pirotte, O.; Pizio, C.; Placakyte, R.; Plamondon, M.; Plano, W. G.; Pleier, M.-A.; Poblaguev, A.; Poddar, S.; Podlyski, F.; Poffenberger, P.; Poggioli, L.; Pohl, M.; Polci, F.; Polesello, G.; Policicchio, A.; Polini, A.; Poll, J.; Polychronakos, V.; Pomarede, D. M.; Pomeroy, D.; Pommès, K.; Pontecorvo, L.; Pope, B. G.; Popovic, D. S.; Poppleton, A.; Popule, J.; Portell Bueso, X.; Porter, R.; Pospelov, G. E.; Pospichal, P.; Pospisil, S.; Potekhin, M.; Potrap, I. N.; Potter, C. J.; Potter, C. T.; Potter, K. P.; Poulard, G.; Poveda, J.; Prabhu, R.; Pralavorio, P.; Prasad, S.; Pravahan, R.; Preda, T.; Pretzl, K.; Pribyl, L.; Price, D.; Price, L. E.; Prichard, P. M.; Prieur, D.; Primavera, M.; Prokofiev, K.; Prokoshin, F.; Protopopescu, S.; Proudfoot, J.; Prudent, X.; Przysiezniak, H.; Psoroulas, S.; Ptacek, E.; Puigdengoles, C.; Purdham, J.; Purohit, M.; Puzo, P.; Pylypchenko, Y.; Qi, M.; Qian, J.; Qian, W.; Qian, Z.; Qin, Z.; Qing, D.; Quadt, A.; Quarrie, D. R.; Quayle, W. B.; Quinonez, F.; Raas, M.; Radeka, V.; Radescu, V.; Radics, B.; Rador, T.; Ragusa, F.; Rahal, G.; Rahimi, A. M.; Rahm, D.; Rajagopalan, S.; Rammes, M.; Ratoff, P. N.; Rauscher, F.; Rauter, E.; Raymond, M.; Read, A. L.; Rebuzzi, D. M.; Redelbach, A.; Redlinger, G.; Reece, R.; Reeves, K.; Reinherz-Aronis, E.; Reinsch, A.; Reisinger, I.; Reljic, D.; Rembser, C.; Ren, Z. L.; Renkel, P.; Rescia, S.; Rescigno, M.; Resconi, S.; Resende, B.; Reznicek, P.; Rezvani, R.; Richards, A.; Richards, R. A.; Richter, D.; Richter, R.; Richter-Was, E.; Ridel, M.; Rieke, S.; Rijpstra, M.; Rijssenbeek, M.; Rimoldi, A.; Rinaldi, L.; Rios, R. R.; Riu, I.; Rivoltella, G.; Rizatdinova, F.; Rizvi, E. R.; Roa Romero, D. A.; Robertson, S. H.; Robichaud-Veronneau, A.; Robinson, D.; Robinson, M.; Robson, A.; Rocha de Lima, J. G.; Roda, C.; Rodriguez, D.; Rodriguez Garcia, Y.; Roe, S.; Røhne, O.; Rojo, V.; Rolli, S.; Romaniouk, A.; Romanov, V. M.; Romeo, G.; Romero Maltrana, D.; Roos, L.; Ros, E.; Rosati, S.; Rosenbaum, G. A.; Rosenberg, E. I.; Rosselet, L.; Rossi, L. P.; Rotaru, M.; Rothberg, J.; Rottländer, I.; Rousseau, D.; Royon, C. R.; Rozanov, A.; Rozen, Y.; Ruan, X.; Ruckert, B.; Ruckstuhl, N.; Rud, V. I.; Rudolph, G.; Rühr, F.; Ruggieri, F.; Ruiz-Martinez, A.; Rumyantsev, L.; Rusakovich, N. A.; Rutherfoord, J. P.; Ruwiedel, C.; Ruzicka, P.; Ryabov, Y. F.; Ryadovikov, V.; Ryan, P.; Rybkin, G.; Rzaeva, S.; Saavedra, A. F.; Sadrozinski, H. F.-W.; Sadykov, R.; Sakamoto, H.; Salamanna, G.; Salamon, A.; Saleem, M.; Salihagic, D.; Salnikov, A.; Salt, J.; Salvachua Ferrando, B. M.; Salvatore, D.; Salvatore, F.; Salvucci, A.; Salzburger, A.; Sampsonidis, D.; Samset, B. H.; Sanchis Lozano, M. A.; Sandaker, H.; Sander, H. G.; Sanders, M. P.; Sandhoff, M.; Sandstroem, R.; Sandvoss, S.; Sankey, D. P. C.; Sanny, B.; Sansoni, A.; Santamarina Rios, C.; Santi, L.; Santoni, C.; Santonico, R.; Santos, D.; Santos, J.; Saraiva, J. G.; Sarangi, T.; Sarkisyan-Grinbaum, E.; Sarri, F.; Sasaki, O.; Sasaki, T.; Sasao, N.; Satsounkevitch, I.; Sauvage, G.; Savard, P.; Savine, A. Y.; Savinov, V.; Sawyer, L.; Saxon, D. H.; Says, L. P.; Sbarra, C.; Sbrizzi, A.; Scannicchio, D. A.; Schaarschmidt, J.; Schacht, P.; Schäfer, U.; Schaetzel, S.; Schaffer, A. C.; Schaile, D.; Schamberger, R. D.; Schamov, A. G.; Schegelsky, V. A.; Scheirich, D.; Schernau, M.; Scherzer, M. I.; Schiavi, C.; Schieck, J.; Schioppa, M.; Schlenker, S.; Schlereth, J. L.; Schmid, P.; Schmidt, M. P.; Schmieden, K.; Schmitt, C.; Schmitz, M.; Schott, M.; Schouten, D.; Schovancova, J.; Schram, M.; Schreiner, A.; Schroeder, C.; Schroer, N.; Schroers, M.; Schuler, G.; Schultes, J.; Schultz-Coulon, H.-C.; Schumacher, J.; Schumacher, M.; Schumm, B. A.; Schune, Ph.; Schwanenberger, C.; Schwartzman, A.; Schwemling, Ph.; Schwienhorst, R.; Schwierz, R.; Schwindling, J.; Scott, W. G.; Searcy, J.; Sedykh, E.; Segura, E.; Seidel, S. C.; Seiden, A.; Seifert, F.; Seixas, J. M.; Sekhniaidze, G.; Seliverstov, D. M.; Sellden, B.; Seman, M.; Semprini-Cesari, N.; Serfon, C.; Serin, L.; Seuster, R.; Severini, H.; Sevior, M. E.; Sfyrla, A.; Shamim, M.; Shan, L. Y.; Shank, J. T.; Shao, Q. T.; Shapiro, M.; Shatalov, P. B.; Shaver, L.; Shaw, C.; Shaw, K.; Sherman, D.; Sherwood, P.; Shibata, A.; Shimojima, M.; Shin, T.; Shmeleva, A.; Shochet, M. J.; Shupe, M. A.; Sicho, P.; Sidoti, A.; Siebel, A.; Siegert, F.; Siegrist, J.; Sijacki, Dj.; Silbert, O.; Silva, J.; Silver, Y.; Silverstein, D.; Silverstein, S. B.; Simak, V.; Simic, Lj.; Simion, S.; Simmons, B.; Simonyan, M.; Sinervo, P.; Sinev, N. B.; Sipica, V.; Siragusa, G.; Sisakyan, A. N.; Sivoklokov, S. Yu.; Sjoelin, J.; Sjursen, T. B.; Skubic, P.; Skvorodnev, N.; Slater, M.; Slavicek, T.; Sliwa, K.; Sloper, J.; Sluka, T.; Smakhtin, V.; Smirnov, S. Yu.; Smirnov, Y.; Smirnova, L. N.; Smirnova, O.; Smith, B. C.; Smith, D.; Smith, K. M.; Smizanska, M.; Smolek, K.; Snesarev, A. A.; Snow, S. W.; Snow, J.; Snuverink, J.; Snyder, S.; Soares, M.; Sobie, R.; Sodomka, J.; Soffer, A.; Solans, C. A.; Solar, M.; Solfaroli Camillocci, E.; Solodkov, A. A.; Solovyanov, O. V.; Soluk, R.; Sondericker, J.; Sopko, V.; Sopko, B.; Sosebee, M.; Sosnovtsev, V. V.; Sospedra Suay, L.; Soukharev, A.; Spagnolo, S.; Spanò, F.; Speckmayer, P.; Spencer, E.; Spighi, R.; Spigo, G.; Spila, F.; Spiwoks, R.; Spousta, M.; Spreitzer, T.; Spurlock, B.; Denis, R. D. St.; Stahl, T.; Stamen, R.; Stancu, S. N.; Stanecka, E.; Stanek, R. W.; Stanescu, C.; Stapnes, S.; Starchenko, E. A.; Stark, J.; Staroba, P.; Starovoitov, P.; Stastny, J.; Staude, A.; Stavina, P.; Stavropoulos, G.; Steinbach, P.; Steinberg, P.; Stekl, I.; Stelzer, B.; Stelzer, H. J.; Stelzer-Chilton, O.; Stenzel, H.; Stevenson, K.; Stewart, G.; Stockton, M. C.; Stoerig, K.; Stoicea, G.; Stonjek, S.; Strachota, P.; Stradling, A.; Straessner, A.; Strandberg, J.; Strandberg, S.; Strandlie, A.; Strauss, M.; Strizenec, P.; Ströhmer, R.; Strom, D. M.; Strong, J. A.; Stroynowski, R.; Strube, J.; Stugu, B.; Stumer, I.; Soh, D. A.; Su, D.; Suchkov, S. I.; Sugaya, Y.; Sugimoto, T.; Suhr, C.; Suk, M.; Sulin, V. V.; Sultansoy, S.; Sumida, T.; Sun, X.; Sundermann, J. E.; Suruliz, K.; Sushkov, S.; Susinno, G.; Sutton, M. R.; Suzuki, T.; Suzuki, Y.; Sviridov, Yu. M.; Sykora, I.; Sykora, T.; Szymocha, T.; Sánchez, J.; Ta, D.; Tackmann, K.; Taffard, A.; Tafirout, R.; Taga, A.; Takahashi, Y.; Takai, H.; Takashima, R.; Takeda, H.; Takeshita, T.; Talby, M.; Talyshev, A.; Tamsett, M. C.; Tanaka, J.; Tanaka, R.; Tanaka, S.; Tanaka, S.; Tappern, G. P.; Tapprogge, S.; Tardif, D.; Tarem, S.; Tarrade, F.; Tartarelli, G. F.; Tas, P.; Tasevsky, M.; Tassi, E.; Taylor, C.; Taylor, F. E.; Taylor, G. N.; Taylor, R. P.; Taylor, W.; Teixeira-Dias, P.; Ten Kate, H.; Teng, P. K.; Terada, S.; Terashi, K.; Terron, J.; Terwort, M.; Testa, M.; Teuscher, R. J.; Tevlin, C. M.; Thadome, J.; Thananuwong, R.; Thioye, M.; Thoma, S.; Thomas, J. P.; Thomas, T. L.; Thompson, E. N.; Thompson, P. D.; Thompson, P. D.; Thompson, R. J.; Thompson, A. S.; Thomson, E.; Thun, R. P.; Tic, T.; Tikhomirov, V. O.; Tikhonov, Y. A.; Timmermans, C. J. W. P.; Tipton, P.; Tique Aires Viegas, F. J.; Tisserant, S.; Tobias, J.; Toczek, B.; Todorov, T.; Todorova-Nova, S.; Toggerson, B.; Tojo, J.; Tokár, S.; Tokushuku, K.; Tollefson, K.; Tomasek, L.; Tomasek, M.; Tomasz, F.; Tomoto, M.; Tompkins, D.; Tompkins, L.; Toms, K.; Tong, G.; Tonoyan, A.; Topfel, C.; Topilin, N. D.; Torrence, E.; Torró Pastor, E.; Toth, J.; Touchard, F.; Tovey, D. R.; Tovey, S. N.; Trefzger, T.; Tremblet, L.; Tricoli, A.; Trigger, I. M.; Trincaz-Duvoid, S.; Trinh, T. N.; Tripiana, M. F.; Triplett, N.; Trivedi, A.; Trocmé, B.; Troncon, C.; Trzupek, A.; Tsarouchas, C.; Tseng, J. C.-L.; Tsiafis, I.; Tsiakiris, M.; Tsiareshka, P. V.; Tsionou, D.; Tsipolitis, G.; Tsiskaridze, V.; Tskhadadze, E. G.; Tsukerman, I. I.; Tsulaia, V.; Tsung, J.-W.; Tsuno, S.; Tsybychev, D.; Turala, M.; Turecek, D.; Turk Cakir, I.; Turlay, E.; Tuts, P. M.; Twomey, M. S.; Tylmad, M.; Tyndel, M.; Tzanakos, G.; Uchida, K.; Ueda, I.; Uhlenbrock, M.; Uhrmacher, M.; Ukegawa, F.; Unal, G.; Underwood, D. G.; Undrus, A.; Unel, G.; Unno, Y.; Urbaniec, D.; Urkovsky, E.; Urquijo, P.; Urrejola, P.; Usai, G.; Uslenghi, M.; Vacavant, L.; Vacek, V.; Vachon, B.; Vahsen, S.; Valenta, J.; Valente, P.; Valentinetti, S.; Valkar, S.; Valladolid Gallego, E.; Vallecorsa, S.; Valls Ferrer, J. A.; van Berg, R.; van der Graaf, H.; van der Kraaij, E.; van der Poel, E.; van der Ster, D.; van Eldik, N.; van Gemmeren, P.; van Kesteren, Z.; van Vulpen, I.; Vandelli, W.; Vandoni, G.; Vaniachine, A.; Vankov, P.; Vannucci, F.; Varela Rodriguez, F.; Vari, R.; Varnes, E. W.; Varouchas, D.; Vartapetian, A.; Varvell, K. E.; Vasilyeva, L.; Vassilakopoulos, V. I.; Vazeille, F.; Vegni, G.; Veillet, J. J.; Vellidis, C.; Veloso, F.; Veness, R.; Veneziano, S.; Ventura, A.; Ventura, D.; Venturi, M.; Venturi, N.; Vercesi, V.; Verducci, M.; Verkerke, W.; Vermeulen, J. C.; Vetterli, M. C.; Vichou, I.; Vickey, T.; Viehhauser, G. H. A.; Villa, M.; Villani, E. G.; Villaplana Perez, M.; Villate, J.; Vilucchi, E.; Vincter, M. G.; Vinek, E.; Vinogradov, V. B.; Viret, S.; Virzi, J.; Vitale, A.; Vitells, O. V.; Vivarelli, I.; Vives Vaques, F.; Vlachos, S.; Vlasak, M.; Vlasov, N.; Vogt, H.; Vokac, P.; Volpi, M.; Volpini, G.; von der Schmitt, H.; von Loeben, J.; von Radziewski, H.; von Toerne, E.; Vorobel, V.; Vorobiev, A. P.; Vorwerk, V.; Vos, M.; Voss, R.; Voss, T. T.; Vossebeld, J. H.; Vranjes, N.; Vranjes Milosavljevic, M.; Vrba, V.; Vreeswijk, M.; Vu Anh, T.; Vudragovic, D.; Vuillermet, R.; Vukotic, I.; Wagner, P.; Wahlen, H.; Walbersloh, J.; Walder, J.; Walker, R.; Walkowiak, W.; Wall, R.; Wang, C.; Wang, H.; Wang, J.; Wang, J. C.; Wang, S. M.; Ward, C. P.; Warsinsky, M.; Wastie, R.; Watkins, P. M.; Watson, A. T.; Watson, M. F.; Watts, G.; Watts, S.; Waugh, A. T.; Waugh, B. M.; Webel, M.; Weber, J.; Weber, M. D.; Weber, M.; Weber, M. S.; Weber, P.; Weidberg, A. R.; Weingarten, J.; Weiser, C.; Wellenstein, H.; Wells, P. S.; Wen, M.; Wenaus, T.; Wendler, S.; Wengler, T.; Wenig, S.; Wermes, N.; Werner, M.; Werner, P.; Werth, M.; Werthenbach, U.; Wessels, M.; Whalen, K.; Wheeler-Ellis, S. J.; Whitaker, S. P.; White, A.; White, M. J.; White, S.; Whiteson, D.; Whittington, D.; Wicek, F.; Wicke, D.; Wickens, F. J.; Wiedenmann, W.; Wielers, M.; Wienemann, P.; Wiglesworth, C.; Wiik, L. A. M.; Wildauer, A.; Wildt, M. A.; Wilhelm, I.; Wilkens, H. G.; Williams, E.; Williams, H. H.; Willis, W.; Willocq, S.; Wilson, J. A.; Wilson, M. G.; Wilson, A.; Wingerter-Seez, I.; Winklmeier, F.; Wittgen, M.; Wolter, M. W.; Wolters, H.; Wosiek, B. K.; Wotschack, J.; Woudstra, M. J.; Wraight, K.; Wright, C.; Wright, D.; Wrona, B.; Wu, S. L.; Wu, X.; Wulf, E.; Xella, S.; Xie, S.; Xie, Y.; Xu, D.; Xu, N.; Yamada, M.; Yamamoto, A.; Yamamoto, S.; Yamamura, T.; Yamanaka, K.; Yamaoka, J.; Yamazaki, T.; Yamazaki, Y.; Yan, Z.; Yang, H.; Yang, U. K.; Yang, Y.; Yang, Z.; Yao, W.-M.; Yao, Y.; Yasu, Y.; Ye, J.; Ye, S.; Yilmaz, M.; Yoosoofmiya, R.; Yorita, K.; Yoshida, R.; Young, C.; Youssef, S. P.; Yu, D.; Yu, J.; Yu, M.; Yu, X.; Yuan, J.; Yuan, L.; Yurkewicz, A.; Zaidan, R.; Zaitsev, A. M.; Zajacova, Z.; Zambrano, V.; Zanello, L.; Zarzhitsky, P.; Zaytsev, A.; Zeitnitz, C.; Zeller, M.; Zema, P. F.; Zemla, A.; Zendler, C.; Zenin, O.; Zenis, T.; Zenonos, Z.; Zenz, S.; Zerwas, D.; Zevi Della Porta, G.; Zhan, Z.; Zhang, H.; Zhang, J.; Zhang, Q.; Zhang, X.; Zhao, L.; Zhao, T.; Zhao, Z.; Zhemchugov, A.; Zheng, S.; Zhong, J.; Zhou, B.; Zhou, N.; Zhou, Y.; Zhu, C. G.; Zhu, H.; Zhu, Y.; Zhuang, X.; Zhuravlov, V.; Zilka, B.; Zimmermann, R.; Zimmermann, S.; Zimmermann, S.; Ziolkowski, M.; Zitoun, R.; Živković, L.; Zmouchko, V. V.; Zobernig, G.; Zoccoli, A.; Zur Nedden, M.; Zutshi, V.

    2010-12-01

    The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing performance, electronics noise, and gain stability are presented. High energy deposits from radiative cosmic muons and beam splash events allow to check the intrinsic constant term of the energy resolution. The uniformity of the electromagnetic barrel calorimeter response along η (averaged over φ) is measured at the percent level using minimum ionizing cosmic muons. Finally, studies of electromagnetic showers from radiative muons have been used to cross-check the Monte Carlo simulation. The performance results obtained using the ATLAS readout, data acquisition, and reconstruction software indicate that the liquid argon calorimeter is well-prepared for collisions at the dawn of the LHC era.

  4. Performance of a lead radiator, gas tube calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Spiegel, L.; Arenton, M.; Chen, T.Y.; Conetti, S.; Cox, B.; Delchamps, S.W.; Etemadi, B.; Fortney, L.; Guffey, K.; Haire, M.

    1989-03-13

    Design and performance of a 4.2 radiation length lead-sandwich, gas tube hodoscope are discussed. The device, measuring 1 /times/ 2 m/sup 2/ in area and 12 cm in depth, was employed in Fermi National Accelerator Laboratory experiment 705. Multiple samplings of anode wires situated within three-walled aluminum tubes were used to generate an X coordinate; similarly, capacitively coupled copper-clad strips were ganged together to yield a Y coordinate. The results reviewed are based on an analysis of electron calibration data taken during a recent six-month running period. In particular, position resolution (in millimeters) is seen to be 0.8 + 3.3/..sqrt..E + 31/E for the 9.92 mm spaced wires and 0.6 + 3.2/..sqrt..E + 32/E for the 12.5 mm strips, where E represents the electron beam energy in GeV. 5 refs., 6 figs.

  5. The Snellen human calorimeter revisited, re-engineered and upgraded: design and performance characteristics.

    Science.gov (United States)

    Reardon, Francis D; Leppik, Kalle E; Wegmann, René; Webb, Paul; Ducharme, Michel B; Kenny, Glen P

    2006-08-01

    The measurement of whole body heat loss in humans and the performance characteristics of a modified Snellen whole body air calorimeter are described. Modifications included the location of the calorimeter in a pressurized room, control of operating temperature over a range of - 15 to + 35 degrees C, control of ambient relative humidity over a range of 20-65%, incorporation of an air mass flow measuring system to provide real time measurement of air mass flow through the calorimeter, incorporation of a constant load 'eddy current' resistance ergometer and an open circuit, expired gas analysis calorimetry system. The performance of the calorimeter is a function of the sensitivity, precision, accuracy and response time characteristics of the fundamental measurement systems including: air mass flow; thermometry and hygrometry. Calibration experiments included a calibration of the air mass flow sensor, the response of the thermometric measurement system for dry heat loss and the response of the hygrometric measurement system for evaporative heat loss. The air mass flow system was evaluated using standard differential temperature procedures to demonstrate linearity and sensitivity of the device. A novel procedure based on differential hygrometry was developed to ascertain the absolute calibration of air mass flow by resolving the unique system coefficient K. The results of the hygrometric calibration demonstrate the air mass flow response of the system is linear over the range of air mass flows from 6 to 15 kg min(-1). R(2) was 0.995. The average half response time (tR50) was 14.5 +/- 2.1 s. Similarly the results of the thermometric calibration demonstrate that the response of the apparatus is linear over the range of power input measured (coefficient of linearity R(2)=0.9997) with a precision of 0.72 W and an accuracy to within 0.36 W. The average (tR50) over all conditions was 6.0 +/- 1.9 min. In summary, modifications brought to the Snellen calorimeter have

  6. Oral creatine supplementation on performance of Quarter Horses used in barrel racing.

    Science.gov (United States)

    Teixeira, F A; Araújo, A L; Ramalho, L O; Adamkosky, M S; Lacerda, T F; Coelho, C S

    2016-06-01

    The aim of this study was to evaluate the effects of oral creatine supplementation on the athletic performance of equines used for barrel racing. Ten healthy Quarter Horses, or Quarter Horse crossbred, weighing 429.7 ± 25.3 kg and with mean age of 3.8 ± 1.2 years, were used. Animals were evaluated in four different moments (M1, M2, M3, M4), and between M3 and M4, they were supplemented with 28 g of creatine/100 kg of body weight, orally, for 45 days. Although significant alterations for LDH activity, plasma glucose and packed cell volume were observed, it was possible to conclude that there was no improvement in the athletic performance for the animals used on the experiment, as there were no changes in time scores, heart rate and plasma lactate, variables considered as performance indicators, before and after supplementation.

  7. Performance of the PADME calorimeter prototype at the DA$\\Phi$NE BTF

    CERN Document Server

    Raggi, M; Valente, P; Ferrarotto, F; Leonardi, E; Organtini, G; Tsankov, L; Georgiev, G; Alexander, J; Buonomo, B; Di Giulio, C; Foggetta, L; Piperno, G

    2016-01-01

    The PADME experiment at the DA$\\Phi$NE Beam-Test Facility (BTF) aims at searching for invisible decays of the dark photon by measuring the final state missing mass in the process $e^+e^- \\to \\gamma+ A'$, with $A'$ undetected. The measurement requires the determination of the 4-momentum of the recoil photon, performed using a homogeneous, highly segmented BGO crystals calorimeter. We report the results of the test of a 5$\\times$5 crystals prototype performed with an electron beam at the BTF in July 2016.

  8. Results of the First Performance Tests of the CMS Electromagnetic Calorimeter

    CERN Document Server

    Adzic, Petar; Almeida, Carlos; Almeida, Nuno; Anagnostou, Georgios; Anfreville, Marc; Anicin, Ivan; Antunovic, Zeljko; Asimidis, Asimakis; Auffray, Etiennette; Baccaro, Stefania; Barney, David; Barone, Luciano; Barrillon, Pierre; Bartoloni, Alessandro; Beauceron, Stephanie; Beaudette, Florian; Bell, Ken W; Benetta, Robert; Bercher, Michel; Beteva, B; Beuselinck, Raymond; Bhardwa, A; Biino, Cristina; Bimbot, Stephane; Bloch, Philippe; Blyth, Simon; Bonesini, Maurizio; Bordalo, Paula; Bornheim, Adolf; Bourotte, Jean; Britton, David; Brown, Robert M; Brunelière, Renaud; Busson, Philippe; Camporesi, Tiziano; Cartiglia, Nicolo; Cavallari, Francesca; Chamont, David; Chang, Paoti; Chang, You-Hao; Charlot, Claude; Chen, E Augustine; Chipaux, Rémi; Cockerill, David J A; Collard, Caroline; Combaret, Christophe; Costantini, Silvia; Da Silva, J C; Dafinei, Ioan; Daskalakis, Georgios; Davatz, Giovanna; De Min, Alberto; Deiters, Konrad; Dejardin, Marc; Della Negra, Rodolphe; Depasse, Pierre; Descamp, J; Dewhirst, Guy; Dhawan, Satish; Diemoz, Marcella; Dissertori, Günther; Dittmar, Michael; Djambazov, Lubomir; Dobrzynski, Ludwik; Drndarevic, Snezana; Dupanloup, Michel; Dzelalija, Mile; Ehlers, Jan; El-Mamouni, H; Peisert, Anna; Evangelou, Ioannis; Fabbro, Bernard; Faure, Jean-Louis; Fay, Jean; Ferri, Federico; Flower, Paul S; Franzoni, Giovanni; Funk, Wolfgang; Gaillac, Anne-Marie; Gargiulo, Corrado; Gascon-Shotkin, S; Geerebaert, Yannick; Gentit, François-Xavier; Ghezzi, Alessio; Gilly, Jean; Giolo-Nicollerat, Anne-Sylvie; Givernaud, Alain; Gninenko, Sergei; Go, Apollo; Godinovic, Nikola; Golubev, Nikolai; Gómez-Reino, Robert; Govoni, Pietro; Grahl, James; Gras, Philippe; Greenhalgh, Justin; Guillaud, Jean-Paul; Haguenauer, Maurice; Hamel De Montechenault, G; Hansen, Magnus; Heath, Helen F; Hill, Jack; Hobson, Peter R; Holmes, Daniel; Holzner, André; Hou, George Wei-Shu; Ille, Bernard; Ingram, Quentin; Jain, Adarsh; Janot, Patrick; Jarry, Patrick; Karar, M A; Kataria, Sushil Kumar; Katchanov, V A; Kennedy, Bruce W; Kloukinas, Kostas; Koblitz, Birger; Kokkas, Panagiotis; Korjik, M; Krasnikov, Nikolai; Krpic, Dragomir; Kyriakis, Aristotelis; Lebeau, Michel; Lecomte, Pierre; Lecoq, Paul; Lemaire, Marie-Claude; Lethuillier, Morgan; Lin, Willis; Lintern, A L; Lister, Alison; Locci, Elizabeth; Lodge, Anthony B; Longo, Egidio; Loukas, Demetrios; Lustermann, Werner; Lynch, Clare; MacKay, Catherine Kirsty; Maletic, Dimitrije; Mandjavidze, Irakli; Manthos, Nikolaos; Markou, Athanasios; Mathez, Hervé; Matveev, Viktor; Maurelli, Georges; Menichetti, Ezio; Meridiani, Paolo; Milenovic, Predrag; Milleret, Gérard; Miné, Philippe; Montecchi, Marco; Mur, Michel; Musienko, Yuri; Nardulli, Alessandro; Nash, Jordan; Neal, Homer; Nédélec, Patrick; Negri, Pietro; Nessi-Tedaldi, Francesca; Newman, Harvey B; Nikitenko, Alexander; Obertino, Maria Margherita; Ofierzynski, Radoslaw Adrian; Organtini, Giovanni; Paganini, Pascal; Paganoni, Marco; Papadopoulos, Ioannis; Paramatti, Riccardo; Pastrone, Nadia; Pauss, Felicitas; Poilleux, Patrick; Puljak, Ivica; Pullia, Antonino; Puzovic, Jovan; Ragazzi, Stefano; Ramos, Sergio; Rander, John; Ravat, Olivier; Raymond, M; Razis, Panos A; Redaelli, Nicola; Regnault, Nicolas; Renker, Dieter; Reucroft, Steve; Reymond, Jean-Marc; Reynaud, Michel; Reynaud, Serge; Romanteau, Thierry; Rondeaux, Françoise; Rosowsky, André; Rovelli, Chiara; Rusack, Roger; Rusakov, Sergey V; Ryan, Matthew John; Rykaczewski, Hans; Sakhelashvili, Tariel; Salerno, Roberto; Santos, Marcelino; Schinzel, Dietrich; Seez, Christopher; Semeniouk, Igor; Sempere-Roldan, P; Sharif, Omar; Sharp, Peter; Shepherd-Themistocleous, Claire; Shevchenko, Sergey; Shivpuri, Ram Krishen; Sidiropoulos, Georgios; Sillou, Daniel; Singovsky, Alexander; Sirois, Yves; Sirunyan, Albert M; Smith, Brian; Smith, Vincent J; Sproston, Martin; Suter, Henry; Swain, John; Tabarelli de Fatis, Tommaso; Takahashi, Maiko; Tapper, Robert J; Tcheremoukhine, Alexandre; Teixeira, Isabel; Teixeira, Joao Paulo; Teller, Olivier; Triantis, Frixos A; Troshin, Sergey; Tyurin, Nikolay; Udriot, Stève; Ueno, Koji; Uzunian, Andrey; Van Vulpen, Ivo; Varela, Joao; Vaz-Cardoso, N; Verrecchia, Patrice; Vichoudis, Paschalis; Viertel, Gert; Virdee, Tejinder; Wang, Minzu; Williams, Jennifer C; Yaselli, Ignacio; Zamiatin, Nikolai; Zelepoukine, Serguei; Zeller, Michael E; Zhang, Lin; Zhu, Kejun; Zhu, Ren-Yuan

    2006-01-01

    Performance tests of some aspects of the CMS ECAL were carried out on modules of the "barrel" sub-system in 2002 and 2003. A brief test with high energy electron beams was made in late 2003 to validate prototypes of the new Very Front End electronics. The final versions of the monitoring and cooling systems, and of the high and low voltage regulation were used in these tests. The results are consistent with the performance targets including those for noise and overall energy resolution, required to fulfil the physics programme of CMS at the LHC.

  9. Calorimeter insertion

    CERN Multimedia

    2006-01-01

    Calorimeter insertion between toroids in the ATLAS experiment detector Calorimeters are surrounding the inner detector. Calorimeters will absorb and measure the energies of the most charged and neutral particles after the collisions. The saved energy in the calorimeter is detected and converted to signals that are taken out with data taking electronics.

  10. Performance of the ATLAS Hadronic Tile Calorimeter in Run-2 and its Upgrade for the High Luminosity LHC

    CERN Document Server

    Solovyanov, Oleg; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudorapidity signals produced by about 10000 channels measuring energies ranging from $\\sim$30 MeV to $\\sim$2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the Tile calorimeter has been studied in-situ employing cosmic ray muons and a large sample of proton-proton collisions acquired during the operations of the LHC. Prompt isolated muons of high momentum from electroweak bosons decays are employed to study the energy response of the calorimeter at the electromagnetic scale. The calorimeter response to hadronic particles is evaluated with a sample of isolated hadrons and the modelling of the response by the Monte Carlo simulation is dis...

  11. Status of the Atlas Calorimeters: their performance after two years of LHC operation and plans for future upgrades.

    CERN Document Server

    Solans, C; The ATLAS collaboration

    2012-01-01

    The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. Its calorimeter system measures the energy and direction of final state particles with pseudo rapidity $|eta| < 4.9$. Accurate identification and measurement of the characteristics of electromagnetic objects (electrons/photons) are performed by liquid argon (LAr)-lead sampling calorimeters in the region $|eta| < 3.2$, using an innovative accordion geometry that provides a fast, uniform azimuthal response without gaps. The hadronic calorimeters measure the properties of hadrons, jets, and tau leptons, and also contribute to the measurement of the missing transverse energy and identification of muons. This is done in the region $|eta| < 1.7$ with a scintillator-steel sampling calorimeter, and in the region $1.4 < |eta| < 3.2$ with a copper-LAr sampling calorimeter. The coverage is extended to $|eta| < 4.9$ by an integrated forward calorimeter (FCal) based on LAr with copp...

  12. Performance studies of the final prototype for the CASTOR forward calorimeter at the CMS experiment

    CERN Document Server

    Aslanoglou, Xenofon; Bakirci, Mustafa Numan; Basegmez, Suzan; Beaumont, Willem; Blocki, Jacek; Borras, Kerstin; Campbell, Alan; Çerçi, Salim; d'Enterria, David; de Silva, M; Dumanoglu, Isa; Erturk, Sefa; Eskut, Eda; Erchov, Y; Göttlicher, P; Gouskos, Loukas; Onengüt, G; Gusev, Yuri; Jung, Hannes; Katkov, Igor; Katsas, Panagiotis; Khein, Lev; Kisoglu, F; Knutsson, Albert; Kuleshov, Sergey; Kuznetsov, Andrey; Lebeau, Michel; McCauley, Thomas; Muhl, Carsten; Musienko, Yuri; Ochesanu, Silvia; Oroku, M; Ozdemir, Kadri; Ozturk, Sertac; Panagiotou, Apostolos; Shileev, K; Sogut, Kenan; Swain, John; Reucroft, Steve; Ripert, Marion; Tiflov, V; Kayis-Topaksu, A; Van Haevermaet, Hans; Van Mechelen, Pierre

    2008-01-01

    We present performance results of the final prototype for the CASTOR quartz-tungsten sampling calorimeter, to be installed in the very forward region of the CMS experiment at the LHC. The energy linearity and resolution, the uniformity, as well as the spatial resolution of the prototype to electromagnetic and hadronic showers are studied with $E=$ 10--200 GeV electrons, $E=$ 20--350 GeV pions, and $E=$ 50, 150 GeV muons in beam tests carried out at CERN/SPS in 2007.

  13. Performance of a Tungsten-Cerium Fluoride Sampling Calorimeter in High-Energy Electron Beam Tests

    CERN Document Server

    Becker, R.; Dissertori, G.; Djambazov, L.; Donega, M.; Lustermann, W.; Marini, A.C.; Nessi-Tedaldi, F.; Pandolfi, F.; Peruzzi, M.; Schönenberger, M.; Cavallari, F.; Dafinei, I.; Diemoz, M.; Lope, C. Jorda; Meridiani, P.; Nuccetelli, M.; Paramatti, R.; Pellegrino, F.; Micheli, F.; Organtini, G.; Rahatlou, S.; Soffi, L.; Brianza, L.; Govoni, P.; Martelli, A.; Tabarelli de Fatis, T.; Monti, V.; Pastrone, N.; Trapani, P.P.; Candelise, V.; Della Ricca, G.

    2015-12-21

    A prototype for a sampling calorimeter made out of cerium fluoride crystals interleaved with tungsten plates, and read out by wavelength-shifting fibres, has been exposed to beams of electrons with energies between 20 and 150 GeV, produced by the CERN Super Proton Synchrotron accelerator complex. The performance of the prototype is presented and compared to that of a Geant4 simulation of the apparatus. Particular emphasis is given to the response uniformity across the channel front face, and to the prototype's energy resolution.

  14. Performance of a tungsten–cerium fluoride sampling calorimeter in high-energy electron beam tests

    Energy Technology Data Exchange (ETDEWEB)

    Becker, R.; Bianchini, L.; Dissertori, G.; Djambazov, L.; Donega, M.; Lustermann, W.; Marini, A.C.; Nessi-Tedaldi, F. [Institut for Particle Physics, ETH Zurich (Switzerland); Pandolfi, F., E-mail: francesco.pandolfi@cern.ch [Institut for Particle Physics, ETH Zurich (Switzerland); Peruzzi, M.; Schönenberger, M. [Institut for Particle Physics, ETH Zurich (Switzerland); Cavallari, F.; Dafinei, I.; Diemoz, M.; Lope, C. Jorda; Meridiani, P.; Nuccetelli, M.; Paramatti, R.; Pellegrino, F. [INFN – Sezione di Roma (Italy); Micheli, F. [Dipartimento di Fisica “Sapienza”, Università di Roma e INFN – Sezione di Roma (Italy); and others

    2015-12-21

    A prototype for a sampling calorimeter made out of cerium fluoride crystals interleaved with tungsten plates, and read out by wavelength-shifting fibres, has been exposed to beams of electrons with energies between 20 and 150 GeV, produced by the CERN Super Proton Synchrotron accelerator complex. The performance of the prototype is presented and compared to that of a GEANT4 simulation of the apparatus. Particular emphasis is given to the response uniformity across the channel front face, and to the prototype's energy resolution.

  15. The KLOE electromagnetic calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Adinolfi, M.; Ambrosino, F.; Antonelli, A.; Antonelli, M.; Anulli, F.; Barbiellini, G.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocci, V.; Bossi, F.; Branchini, P.; Cabibbo, G.; Caloi, R.; Campana, P.; Casarsa, M.; Cataldi, G.; Ceradini, F.; Cervelli, F.; Ciambrone, P.; De Lucia, E.; De Simone, P.; De Zorzi, G.; Dell' Agnello, S.; Denig, A.; Di Domenico, A.; Di Donato, C.; Di Falco, S.; Doria, A.; Erriquez, O.; Farilla, A.; Ferrari, A.; Ferrer, M.L.; Finocchiaro, G.; Forti, C.; Franceschi, A.; Franzini, P.; Gao, M.L.; Gatti, C.; Gauzzi, P.; Giannasi, A.; Giovannella, S.; Graziani, E.; Han, H.G.; Han, S.W.; Huang, X.; Incagli, M.; Ingrosso, L.; Keeble, L.; Kim, W.; Kuo, C.; Lanfranchi, G. E-mail: gaia.lanfranchi@lnf.infn.it; Lee-Franzini, J.; Lomtadze, T.; Mao, C.S.; Martemianov, M.; Mei, W.; Messi, R.; Miscetti, S.; Moccia, S.; Moulson, M.; Mueller, S.; Murtas, F.; Pacciani, L.; Palomba, M.; Palutan, M.; Pasqualucci, E.; Passalacqua, L.; Passeri, A.; Picca, D.; Pirozzi, G.; Pontecorvo, L.; Primavera, M.; Santangelo, P.; Santovetti, E.; Saracino, G.; Schamberger, R.D.; Sciascia, B.; Scuri, F.; Sfiligoi, I.; Silano, P.; Spadaro, T.; Spiriti, E.; Tortora, L.; Valente, P.; Valeriani, B.; Venanzoni, G.; Ventura, A.; Woelfle, S.; Wu, Y.; Xie, Y.G.; Zema, P.F.; Zhang, C.D.; Zhang, J.Q.; Zhao, P.P

    2002-11-21

    The KLOE calorimeter is a fine lead-scintillating fiber sampling calorimeter. We describe in the following the calibration procedures and the calorimeter performances obtained after 3 years of data taking. We get an energy resolution for electromagnetic showers of 5.4%/{radical}E(GeV) and a time resolution of 56 ps/{radical}E(GeV). We also present a measurement of efficiency for low-energy photons.

  16. Micro Calorimeter for Batteries

    Energy Technology Data Exchange (ETDEWEB)

    Santhanagopalan, Shriram [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-08-01

    As battery technology forges ahead and consumer demand for safer, more affordable, high-performance batteries grows, the National Renewable Energy Laboratory (NREL) has added a patented Micro Calorimeter to its existing family of R&D 100 Award-winning Isothermal Battery Calorimeters (IBCs). The Micro Calorimeter examines the thermal signature of battery chemistries early on in the design cycle using popular coin cell and small pouch cell designs, which are simple to fabricate and study.

  17. Calibration of the CMS Electromagnetic Calorimeter with first LHC data

    CERN Document Server

    Sola, Valentina

    2011-01-01

    The first 7 TeV LHC collisions recorded with the CMS detector have been used to perform a channel-by-channel calibration of the electromagnetic calorimeter (ECAL). Decays of $\\pi^0$ and $\\eta$ into two photons as well as the azimuthal symmetry of the average energy deposition at a given pseudorapidity are utilized to equalize the response of the individual channels. The ECAL comprises a central {\\it barrel} section and two {\\it endcaps}. Based on an integrated luminosity of up to 250~nb$^{-1}$, a channel-by-channel {\\it in-situ} calibration precision of 0.6\\% has been achieved in the barrel ECAL in the pseudorapidity region $\\textpipe \\eta \\textpipe < 0.8$. The energy scale of the ECAL has been investigated and found to agree with the simulation to within 1\\% in the barrel and 3\\% in the endcaps.

  18. Performance of a prototype for stimulated recovery of radiation damage for the PANDA EMC forward endcap and barrel

    Energy Technology Data Exchange (ETDEWEB)

    Kuske, Till; Dormenev, Valera; Novotny, Rainer; Zaunick, Hans-Georg [II. Physikalisches Institut, Justus-Liebig Universitaet (Germany)

    2015-07-01

    The future Electromagnetic Calorimeter (EMC) of the PANDA detector at FAIR will be based on a new generation of lead tungstate crystals (PWO-II). It is optimized to measure particle energies from 10 GeV down to 10-20 MeV. The operating temperature of the EMC will be -25 C. Due to the operation in a strong radiation environment one of the most critical parameter of PWO-II is radiation hardness. The radiation damage of PWO-II can be compensated by spontaneous relaxation of the color centers via thermo-activation. The process is strongly suppressed at -25 C, which is limiting the energy resolution of the EMC. The recovery process can be accelerated by illumination of the crystal with light even in the infrared region. A prototype implementation of the stimulated recovery for the PANDA EMC forward endcap is shown. Detailed studies concerning flux and intensity for different recovery modes at -25 C are presented. Additionally a concept for the recovery of radiation damage in the barrel part of the EMC is discussed.

  19. Performance of the ATLAS Liquid Argon Calorimeter after three years of LHC operation and plans for a future upgrade

    CERN Document Server

    Nikiforou, Nikiforos

    2013-01-01

    The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. Liquid argon sampling calorimeters are used for all electromagnetic calorimetry as well as hadronic calorimetry in the endcaps. After installation in 2004--2006, the calorimeters were extensively commissioned over the three--year period prior to first collisions in 2009, using cosmic rays and single LHC beams. Since then, approximately 27~fb$\\mathbf{^{-1}}$ of data have been collected at an unprecedented center of mass energy. During all these stages, the calorimeter and its electronics have been operating almost optimally, with a performance very close to specifications. This paper covers all aspects of these first years of operation. The excellent performance achieved is especially presented in the context of the discovery of the elusive Higgs boson. The future plans to preserve this performance until the end of the LHC program are also presented.

  20. 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.

  1. Construction and Performance of the ATLAS SCT Barrels and Cosmic Tests

    CERN Document Server

    Demirkoz, Bilge Melahat

    2007-01-01

    ATLAS is a multi-purpose detector for the LHC and will detect proton-proton collisions with center of mass energy of $14$TeV. Part of the central inner detector, the Semi-Conductor Tracker (SCT) barrels, were assembled and tested at Oxford University and later integrated at CERN with the TRT (Transition Radiation Tracker) barrel. The barrel SCT is composed of 4 layers of silicon strip modules with two sensor layers with $80 \\mu$m channel width. The design of the modules and the barrels has been optimized for low radiation length while maintaining mechanical stability, bringing services to the detector, and ensuring a cold and dry environment. The high granularity, high detector efficiency and low noise occupancy ($ < 5 \\times 10^{-4}$) of the SCT will enable ATLAS to have an efficient pattern recognition capability. Due to the binary nature of the SCT read-out, a stable read-out system and the calibration system is of critical importance. SctRodDaq is the online software framework for the calibration and a...

  2. Performance and upgrade of the CMS electromagnetic calorimeter trigger for Run II

    CERN Document Server

    Sauvan, Jean-baptiste

    2014-01-01

    The CMS experiment implements a sophisticated two-level online trigger selection system that achieves a rejection factor of nearly $10^5$. The level one (L1) trigger is based on coarse information coming from the calorimeters and the muon detectors while the high-level trigger combines fine-grain information from all sub-detectors. In the near future the LHC will increase its centre of mass energy to 13 TeV and progressively reach an instantaneous luminosity of $2\\times 10^{34}\\,\\textrm{cm}^{-2}\\textrm{s}^{-1}$. In order to guarantee a successful and ambitious physics program under this challenging environment, the CMS Trigger and Data acquisition system must be consolidated. In particular the L1 calorimeter Trigger hardware and architecture will be changed. The aim is to maintain the current thresholds and improve the performance. This programme will be achieved by using $\\mu$TCA (Advanced Mezzanine Card) architecture with fast optical links and latest generation FPGAs. Sophisticated object reconstruction al...

  3. Performance of the ATLAS Liquid Argon Calorimeters in LHC Run-1 and Run-2

    CERN Document Server

    Benitez, Jose; The ATLAS collaboration

    2016-01-01

    The ATLAS detector was designed and built to study proton-proton collisions produced at the LHC at centre-of-mass energies up to 14 TeV and instantaneous luminosities up to $10^{34}$ cm$^{-2}$ s${^-1}$. Liquid argon (LAr) sampling calorimeters are employed for all electromagnetic calorimetry in the pseudorapidity region $|\\eta|<3.2$, and for hadronic calorimetry in the region from $|\\eta|=1.5$ to $|\\eta|=4.9$. The calibration and performance of the LAr calorimetry system was established during beam tests, cosmic ray muon measurements and in particular the first three years of pp collision data-taking. During this period, referred to as Run-1, approximately 27~fb$^{-1}$ of data have been collected at the center-of-mass energies of 7 and 8~TeV. Following a period of detector consolidation during a long shutdown, Run-2 started in 2015 with approximately 3.9~fb$^{-1}$ of data at a center-of-mass energy of 13~TeV recorded in this year. Results on the LAr calorimeter operation, monitoring and data quality, as we...

  4. Design and Performance of the Level 1 Calorimeter Trigger for the BABAR Detector

    CERN Document Server

    Dauncey, P D

    2001-01-01

    Since May 1999 the BABAR detector has been taking data at the PEP-II asymmetric electron-positron collider at the Stanford Linear Accelerator Center, California. This experiment requires a very large data sample and the PEP-II accelerator uses intense beams to deliver the high collision rates needed. This poses a severe challenge to the BaBar trigger system, which must reject the large rate of background signals resulting from the high beam currents whilst accepting the collisions of interest with very high efficiency. One of the systems that performs this task is the Level 1 Calorimeter Trigger, which identifies energy deposits left by particles in the BABAR calorimeter. It is a digital, custom, fixed latency system which makes heavy use of high-speed FPGA devices to allow flexibility in the choice of data filtering algorithms. Results from several intermediate processing stages are read out, allowing the selection algorithm to be fully analysed and optimized offline. In addition, the trigger is monitored in...

  5. Operation and Performance of the ATLAS Level-1 Calorimeter and Topological Triggers in Run 2

    CERN Document Server

    Weber, Sebastian Mario; The ATLAS collaboration

    2017-01-01

    In Run 2 at CERN's Large Hadron Collider, the ATLAS detector uses a two-level trigger system to reduce the event rate from the nominal collision rate of 40 MHz to the event storage rate of 1 kHz, while preserving interesting physics events. The first step of the trigger system, Level-1, reduces the event rate to 100 kHz within a latency of less than $2.5$ $\\mu\\text{s}$. One component of this system is the Level-1 Calorimeter Trigger (L1Calo), which uses coarse-granularity information from the electromagnetic and hadronic calorimeters to identify regions of interest corresponding to electrons, photons, taus, jets, and large amounts of transverse energy and missing transverse energy. In these proceedings, we discuss improved features and performance of the L1Calo system in the challenging, high-luminosity conditions provided by the LHC in Run 2. A new dynamic pedestal correction algorithm reduces pile-up effects and the use of variable thresholds and isolation criteria for electromagnetic objects allows for opt...

  6. Lessons from Monte Carlo simulations of the performance of a dual-readout fiber calorimeter

    CERN Document Server

    Akchurin, N; Cardini, A; Cascella, M; De Pedis, D; Ferrari, R; Fracchia, S; Franchino, S; Fraternali, M; Gaudio, G; Genova, P; Hauptman, J; La Rotonda, L; Lee, S; Livan, M; Meoni, E; Pinci, D; Policicchio, A; Saraiva, J G; Scuri, F; Sill, A; Venturelli, T; Wigmans, R

    2014-01-01

    The RD52 calorimeter uses the dual-readout principle to detect both electromagnetic and hadronic showers, as well as muons. Scintillation and Cherenkov light provide the two signals which, in combination, allow for superior hadronic performance. In this paper, we report on detailed, GEANT4 based Monte Carlo simulations of the performance of this instrument. The results of these simulations are compared in great detail to measurements that have been carried out and published by the DREAM Collaboration. This comparison makes it possible to understand subtle details of the shower development in this unusual particle detector. It also allows for predictions of the improvement in the performance that may be expected for larger detectors of this type. These studies also revealed some inadequacies in the GEANT4 simulation packages, especially for hadronic showers, but also for the Cherenkov signals from electromagnetic showers.

  7. ALEPH end-cap and barrel

    CERN Multimedia

    Patrice Loiez

    1993-01-01

    The end-cap is pulled away from the barrel on the ALEPH detector so that the hadronic calorimeter and muon chambers are revealed. The end-cap maximises the data available from particles produced along the direction of the beam. The workers on the inner part of the detector give a sense of scale.

  8. ATLAS: last few metresfor the Calorimeter

    CERN Multimedia

    2005-01-01

    On Friday 4th November, the ATLAS Barrel Calorimeter was moved from its assembly point at the side of the ATLAS cavern to the centre of the toroidal magnet system. The detector was finally aligned, to the precision of within a millimetre, on Wednesday 9th November. The ATLAS installation team, led by Tommi Nyman, after having positioned the Barrel Calorimeter in its final location in the ATLAS experimental cavern UX15. The Barrel Calorimeter which will absorb and measure the energy of photons, electrons and hadrons at the core of the ATLAS detector is 8.6 meters in diameter, 6.8 meters long, and weighs over 1600 Tonnes. It consists of two concentric cylindrical detector elements. The innermost comprises aluminium pressure vessels containing the liquid argon electromagnetic calorimeter and the solenoid magnet. The outermost is an assembly of 64 hadron tile calorimeter sectors. Assembled 18 meters away from its final position, the Barrel Calorimeter was relocated with the help of a railway, which allows the ...

  9. ATLAS High-Level Trigger performance for calorimeter-based algorithms in LHC Run-I

    CERN Document Server

    Mann, A; The ATLAS collaboration

    2014-01-01

    During Run-I of the Large Hadron Collider at CERN the ATLAS detector recorded more than 26 fb$^{-1}$ of proton-proton collision events. One of the key components of the ATLAS detector is its trigger system. In order to keep up with the fast-paced evolution of the beam conditions during Run-I, the trigger selection had to be constantly adapted. For most of the calorimeter-based triggers only modest modifications of the thresholds had to be made, given the change in instantaneous luminosity of five orders of magnitude. This was achieved by various improvements in the High-Level Trigger algorithms, in several places abandoning the original RoI-based concept and introducing new features to overcome previous limitations. The excellent performance of both ATLAS and the LHC made possible the discovery of a new particle already during Run-I, the long-sought Higgs boson.

  10. ATLAS High Level Calorimeter Trigger Software Performance for Cosmic Ray Events

    CERN Document Server

    Oliveira Damazio, Denis; The ATLAS collaboration

    2009-01-01

    The ATLAS detector is undergoing intense commissioning effort with cosmic rays preparing for the first LHC collisions next spring. Combined runs with all of the ATLAS subsystems are being taken in order to evaluate the detector performance. This is an unique opportunity also for the trigger system to be studied with different detector operation modes, such as different event rates and detector configuration. The ATLAS trigger starts with a hardware based system which tries to identify detector regions where interesting physics objects may be found (eg: large energy depositions in the calorimeter system). An approved event will be further processed by more complex software algorithms at the second level where detailed features are extracted (full detector granularity data for small portions of the detector is available). Events accepted at this level will be further processed at the so-called event filter level. Full detector data at full granularity is available for offline like processing with complete calib...

  11. Study of BESIII electromagnetic calorimeter performance with radiative lepton pair events

    CERN Document Server

    Prasad, Vindhyawasini; Ji, Xiaobin; Li, Weidong; Liu, Huaimin; Lou, Xinchou

    2016-01-01

    We study the photon detection efficiency and position resolution of the electromagnetic calorimeter (EMC) of the BESIII detector. The control samples of the initial-state-radiation (ISR) process of $e^+e^-\\rightarrow \\gamma \\mu^+\\mu^-$ at $J/\\psi$ and $\\psi(3770)$ resonances are used for the calibration of the photon cluster shapes and photon detection efficiency study. The photon detection efficiency is defined as the fraction of predicted photon, determined by performing a kinematic fit with the four momenta of two charged tracks only, matched with the actual photons in the EMC. The spatial resolution of the EMC is studied in polar ($\\theta$) and azimuthal ($\\phi$) angle directions in a cylindrical coordinate system centered at the interaction point, with z-axis along the beam direction.

  12. Performance of the ATLAS liquid argon forward calorimeter in beam tests

    CERN Document Server

    Archambault, J P; Cadabeschi, M; Epshteyn, V; Galt, C; Gillberg, D; Gorbounov, P; Heelan, L; Khakzad, M; Khovanskiy, V; Krieger, P; Loch, P; McCarthy, T G; Oakham, F G; Orr, R S; Rutherfoord, J; Savine, A; Schram, M; Shatalov, P; Shaver, L; Shupe, M; Strickland, V; Thompson, P; Tsukerman, I

    2013-01-01

    One of two ATLAS Forward Calorimeters, consisting of threemodules, one behind the other, was exposed to particle beams ofknown energies in order to study the detector performance with andwithout the presence of upstream material in the beam, and at theinner edge of the acceptance where shower energy containment isincomplete. Data were taken in the H6 beamline at CERN usingelectron and hadron beams with energies from 10 to 200 GeV.Results related to the intrinsic detector calibration, based on datataken with a minimal amount of material in front of the detector,have been previously published, but are updated here. This paperfocuses on studies of data taken with additional upstream materialin place. The effects of this additional material on the linearityand resolution of the response are presented. The response at theinner edge of the acceptance is also investigated. For all analyses,results based on a GEANT4 simulation of the beam-test setup anddetector response are also presented.

  13. Investigation of Battery Heat Generation and Key Performance Indicator Efficiency Using Isothermal Calorimeter

    DEFF Research Database (Denmark)

    Khan, Mohammad Rezwan; Kær, Søren Knudsen

    2016-01-01

    , and the heat flux of the battery cell at the same time. Temperatures on the surface of the cell are measured using contact thermocouples, whereas, the heat flux is measured simultaneously by the isothermal calorimeter. This heat flux measurement is used for determining the heat generation inside the cell....... Consequently, using the heat generation result the important performance constituent of the battery cell efficiency is calculated. Those are accomplished at different temperature levels (-5°C, 10°C, 25°C and 40°C) of continuous charge and discharge constant current rate (1C,2C,4......C,8C,10C (maximum)). There is a significant change in heat generation in both charge and discharge events on different temperature and C-rate. The heat flux change level is non-linear. This nonlinear heat flux is responsible for the nonlinear change of efficiency in different C-rate in a particular...

  14. AIDA: concerted calorimeter development

    CERN Multimedia

    Felix Sefkow

    2013-01-01

    AIDA – the EU-funded project bringing together more than 80 institutes worldwide – aims at developing new detector solutions for future accelerators. Among the highlights reported at AIDA’s recent annual meeting in Frascati was the completion of an impressive calorimeter test beam programme, conducted by the CALICE collaboration over the past two years at CERN’s PS and SPS beam lines.   The CALICE tungsten calorimeter prototype under test at CERN. This cubic-metre hadron calorimeter prototype has almost 500,000 individually read-out electronics channels – more than all the calorimeters of ATLAS and CMS put together. Calorimeter development in AIDA is mainly motivated by experiments at possible future electron-positron colliders, namely ILC or CLIC. The physics requirements of such future machines demand extremely high-performance calorimetry. This is best achieved using a finely segmented system that reconstructs events using the so-called pa...

  15. The design and performance of a twenty barrel hydrogen pellet injector for Alcator C-Mod

    Energy Technology Data Exchange (ETDEWEB)

    Urbahn, John A. [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

    1994-05-01

    A twenty barrel hydrogen pellet injector has been designed, built and tested both in the laboratory and on the Alcator C-Mod Tokamak at MIT. The injector functions by firing pellets of frozen hydrogen or deuterium deep into the plasma discharge for the purpose of fueling the plasma, modifying the density profile and increasing the global energy confinement time. The design goals of the injector are: (1) Operational flexibility, (2) High reliability, (3) Remote operation with minimal maintenance. These requirements have lead to a single stage, pipe gun design with twenty barrels. Pellets are formed by in- situ condensation of the fuel gas, thus avoiding moving parts at cryogenic temperatures. The injector is the first to dispense with the need for cryogenic fluids and instead uses a closed cycle refrigerator to cool the thermal system components. The twenty barrels of the injector produce pellets of four different size groups and allow for a high degree of flexibility in fueling experiments. Operation of the injector is under PLC control allowing for remote operation, interlocked safety features and automated pellet manufacturing. The injector has been extrusively tested and shown to produce pellets reliably with velocities up to 1400 m/sec. During the period from September to November of 1993, the injector was successfully used to fire pellets into over fifty plasma discharges. Experimental results include data on the pellet penetration into the plasma using an advanced pellet tracking diagnostic with improved time and spatial response. Data from the tracker indicates pellet penetrations were between 30 and 86 percent of the plasma minor radius.

  16. The performance of the Barrel CRID at the SLD: Long-term operational experience

    Energy Technology Data Exchange (ETDEWEB)

    Abe, K. [Tohoku Univ., Sendai (Japan); Ashford, V.; Aston, D. [Stanford Univ., CA (US). Stanford Linear Accelerator Center] [and others

    1997-11-01

    The Barrel CRID detector has been operating successfully at SLD for the past 7 years. It is an important tool for SLD physics analyses. The authors report results based on long term operational experience of a number of important quantities such as the Cherenkov quality factor, N{sub o}, of the device, fluid transparency, electron lifetime, single electron detection efficiency, anode wire aging, TMAE purity, long term stability of the gas refraction index, liquid radiator transparency, Cherenkov angle resolution and the number of photoelectrons observed per ring.

  17. Fast Shower Simulation in the ATLAS Calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    Barberio, E.; /Melbourne U.; Boudreau, J.; /Pittsburgh U.; Butler, B.; /SLAC; Cheung, S.L.; /Toronto U.; Dell' Acqua, A.; /CERN; Di Simone, A.; /CERN; Ehrenfeld, W.; /Hamburg U. /DESY; Gallas, M.V.; /CERN; Glazov, A.; /DESY; Marshall, Z.; /Caltech /Nevis Labs, Columbia U.; Mueller, J.; /Pittsburgh U.; Placakyte, R.; /DESY; Rimoldi, A.; /Pavia U. /INFN, Pavia; Savard, P.; /Toronto U.; Tsulaia, V.; /Pittsburgh U.; Waugh, A.; /Sydney U.; Young, C.C.; /SLAC

    2011-11-08

    The time to simulate pp collisions in the ATLAS detector is largely dominated by the showering of electromagnetic particles in the heavy parts of the detector, especially the electromagnetic barrel and endcap calorimeters. Two procedures have been developed to accelerate the processing time of electromagnetic particles in these regions: (1) a fast shower parameterisation and (2) a frozen shower library. Both work by generating the response of the calorimeter to electrons and positrons with Geant 4, and then reintroduce the response into the simulation at runtime. In the fast shower parameterisation technique, a parameterization is tuned to single electrons and used later by simulation. In the frozen shower technique, actual showers from low-energy particles are used in the simulation. Full Geant 4 simulation is used to develop showers down to {approx} 1 GeV, at which point the shower is terminated by substituting a frozen shower. Judicious use of both techniques over the entire electromagnetic portion of the ATLAS calorimeter produces an important improvement of CPU time. We discuss the algorithms and their performance in this paper.

  18. The TileCal Barrel Test Assembly

    CERN Multimedia

    Leitner, R

    On 30th October, the mechanics test assembly of the central barrel of the ATLAS tile hadronic calorimeter was completed in building 185. It started on 23rd June and is the second wheel for the Tilecal completely assembled this year. The ATLAS engineers and technicians are quick: instead of the 27 weeks initially foreseen for assembling the central barrel of the tile hadronic calorimeter (Tilecal) in building 185, they inserted the last of the 64 modules on 30th October after only 19 weeks. In part, this was due to the experience gained in the dry run assembly of the first extended barrel, produced in Spain, in spring this year (see Bulletin 23/2003); however, the central barrel is twice as long - and twice as heavy. With a length of 6.4 metres, an outer diameter of 8.5 metres and an inner diameter of 4.5 metres, the object weight is 1300 tonnes. The whole barrel cylinder is supported by the stainless steel support structure weighing only 27 tons. The barrel also has to have the right shape: over the whole 8...

  19. Performance of the ATLAS Hadronic Tile Calorimeter in Run-2 and its Upgrade for the High Luminosity LHC

    CERN Document Server

    Solovyanov, Oleg; The ATLAS collaboration

    2017-01-01

    The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudorapidity < 1.7. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal frontend electronics reads out the signals produced by about 10000 channels measuring energies ranging from ~30 MeV to ~2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the Tile calorimeter has been studied in-situ employing cosmic ray muons and a large sample of proton-proton collisions acquired during the operations of the LHC. Prompt isolated muons of high moment...

  20. Investigation of Battery Heat Generation and Key Performance Indicator Efficiency Using Isothermal Calorimeter

    DEFF Research Database (Denmark)

    Khan, Mohammad Rezwan; Kær, Søren Knudsen

    2016-01-01

    In this experiment-based research, the performance and behaviour of a pouch type Li-ion battery cell are reported. The commercial test cell has a Lithium Titanate Oxide (LTO) based anode with 13Ah capacity. It is accomplished by measuring the evolution of surface temperature distribution, and the......In this experiment-based research, the performance and behaviour of a pouch type Li-ion battery cell are reported. The commercial test cell has a Lithium Titanate Oxide (LTO) based anode with 13Ah capacity. It is accomplished by measuring the evolution of surface temperature distribution......, and the heat flux of the battery cell at the same time. Temperatures on the surface of the cell are measured using contact thermocouples, whereas, the heat flux is measured simultaneously by the isothermal calorimeter. This heat flux measurement is used for determining the heat generation inside the cell....... Consequently, using the heat generation result the important performance constituent of the battery cell efficiency is calculated. Those are accomplished at different temperature levels (-5°C, 10°C, 25°C and 40°C) of continuous charge and discharge constant current rate (1C,2C,4...

  1. GSPEL - Calorimeter Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — Testing performance claims on heat transfer componentsThe Calorimeter Lab, located in the Ground Systems Power and Energy Lab (GSPEL), is one of the largest in the...

  2. GSPEL - Calorimeter Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — Testing performance claims on heat transfer components The Calorimeter Lab, located in the Ground Systems Power and Energy Lab (GSPEL), is one of the largest in the...

  3. Performance of CMS hadron calorimeter timing and synchronization using test beam, cosmic ray, and LHC beam data

    CERN Document Server

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    2010-01-01

    This paper discusses the design and performance of the time measurement technique and of the synchronization systems of the CMS hadron calorimeter. Timing performance results are presented from the Cosmic Run At Four Tesla and LHC beam runs taken in the Autumn of 2008. For hadronic showers of energy greater than 100 GeV, the timing resolution is measured to be about 1.2 ns. The inter-channel synchronization is measured to be within 2 ns.

  4. Performance of CMS hadron calorimeter timing and synchronization using test beam, cosmic ray, and LHC beam data

    CERN Document Server

    Chatrchyan, S; 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; 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; Pinto, C; Pompili, A; Pugliese, G; Rajan, R; Ranieri, A; Romano, F; Roselli, G; Selvaggi, G; Shinde, Y; Silvestris, L; Tupputi, S; Zito, G; Abbiendi, G; Bacchi, W; Benvenuti, A C; Boldini, M; Bonacorsi, D; Braibant-Giacomelli, S; Cafaro, V D; Caiazza, S S; Capiluppi, P; Castro, A; Cavallo, F R; Codispoti, G; Cuffiani, M; D'Antone, I; Dallavalle, G M; Fabbri, F; Fanfani, A; Fasanella, D; Giacomelli, P; Giordano, V; Giunta, M; Grandi, C; Guerzoni, M; Marcellini, S; Masetti, G; Montanari, A; Navarria, F L; Odorici, F; Pellegrini, G; Perrotta, A; Rossi, A M; Rovelli, T; Siroli, G; Torromeo, G; Travaglini, R; Albergo, S; Costa, S; Potenza, R; Tricomi, A; Tuve, C; Barbagli, G; Broccolo, G; Ciulli, V; Civinini, C; D'Alessandro, R; Focardi, E; Frosali, S; Gallo, E; Genta, C; Landi, G; Lenzi, P; Meschini, M; Paoletti, S; Sguazzoni, G; Tropiano, A; Benussi, L; Bertani, M; Bianco, S; Colafranceschi, S; Colonna, D; Fabbri, F; Giardoni, M; Passamonti, L; Piccolo, D; Pierluigi, D; Ponzio, B; Russo, A; Fabbricatore, P; Musenich, R; Benaglia, A; Calloni, M; Cerati, G B; D'Angelo, P; De Guio, F; Farina, F M; Ghezzi, A; Govoni, P; Malberti, M; Malvezzi, S; Martelli, A; Menasce, D; Miccio, V; Moroni, L; Negri, P; Paganoni, M; Pedrini, D; Pullia, A; Ragazzi, S; Redaelli, N; Sala, S; Salerno, R; Tabarelli de Fatis, T; Tancini, V; Taroni, S; Buontempo, S; Cavallo, N; Cimmino, A; De Gruttola, M; Fabozzi, F; Iorio, A O M; Lista, L; Lomidze, D; Noli, P; Paolucci, P; Sciacca, C; Azzi, P; Bacchetta, N; Barcellan, L; Bellan, P; Bellato, M; Benettoni, M; Biasotto, M; Bisello, D; Borsato, E; Branca, A; Carlin, R; Castellani, L; Checchia, P; Conti, E; Dal Corso, F; De Mattia, M; Dorigo, T; Dosselli, U; Fanzago, F; Gasparini, F; Gasparini, U; Giubilato, P; Gonella, F; Gresele, A; Gulmini, M; Kaminskiy, A; Lacaprara, S; Lazzizzera, I; Margoni, M; Maron, G; Mattiazzo, S; Mazzucato, M; Meneghelli, M; Meneguzzo, A T; Michelotto, M; Montecassiano, F; Nespolo, M; Passaseo, M; Pegoraro, M; Perrozzi, L; Pozzobon, N; Ronchese, P; Simonetto, F; Toniolo, N; Torassa, E; Tosi, M; Triossi, A; Vanini, S; Ventura, S; Zotto, P; Zumerle, G; Baesso, P; Berzano, U; Bricola, S; Necchi, M M; Pagano, D; Ratti, S P; Riccardi, C; Torre, P; Vicini, A; Vitulo, P; Viviani, C; Aisa, D; Aisa, S; Babucci, E; Biasini, M; Bilei, G M; Caponeri, B; Checcucci, B; Dinu, N; Fanò, L; Farnesini, L; Lariccia, P; Lucaroni, A; Mantovani, G; Nappi, A; Piluso, A; Postolache, V; Santocchia, A; Servoli, L; Tonoiu, D; Vedaee, A; Volpe, R; Azzurri, P; Bagliesi, G; Bernardini, J; Berretta, L; Boccali, T; Bocci, A; Borrello, L; Bosi, F; Calzolari, F; Castaldi, R; Dell'Orso, R; Fiori, F; Foà, L; Gennai, S; Giassi, A; Kraan, A; Ligabue, F; Lomtadze, T; Mariani, F; Martini, L; Massa, M; Messineo, A; Moggi, A; Palla, F; Palmonari, F; Petragnani, G; Petrucciani, G; Raffaelli, F; Sarkar, S; Segneri, G; Serban, A T; Spagnolo, P; Tenchini, R; Tolaini, S; Tonelli, G; Venturi, A; Verdini, P G; Baccaro, S; Barone, L; Bartoloni, A; Cavallari, F; Dafinei, I; Del Re, D; Di Marco, E; Diemoz, M; Franci, D; Longo, E; Organtini, G; Palma, A; Pandolfi, F; Paramatti, R; Pellegrino, F; Rahatlou, S; Rovelli, C; Alampi, G; Amapane, N; Arcidiacono, R; Argiro, S; Arneodo, M; Biino, C; Borgia, M A; Botta, C; Cartiglia, N; Castello, R; Cerminara, G; Costa, M; Dattola, D; Dellacasa, G; Demaria, N; Dughera, G; Dumitrache, F; Graziano, A; Mariotti, C; Marone, M; Maselli, S; Migliore, E; Mila, G; Monaco, V; Musich, M; Nervo, M; Obertino, M M; Oggero, S; Panero, R; Pastrone, N; Pelliccioni, M; Romero, A; Ruspa, M; Sacchi, R; Solano, A; Staiano, A; Trapani, P P; Trocino, D; Vilela Pereira, A; Visca, L; Zampieri, A; Ambroglini, F; Belforte, S; Cossutti, F; Della Ricca, G; Gobbo, B; Penzo, A; Chang, S; Chung, J; Kim, D H; Kim, G N; Kong, D J; Park, H; Son, D C; Bahk, S Y; Song, S; Jung, S Y; Hong, B; Kim, H; Kim, J H; Lee, K S; Moon, D H; Park, S K; Rhee, H B; Sim, K S; Kim, J; Choi, M; Hahn, G; Park, I C; Choi, S; Choi, Y; Goh, J; Jeong, H; Kim, T J; Lee, J; Lee, S; Janulis, M; Martisiute, D; Petrov, P; Sabonis, T; Castilla Valdez, H; Sánchez Hernández, A; Carrillo Moreno, S; Morelos Pineda, A; Allfrey, P; Gray, R N C; Krofcheck, D; Bernardino Rodrigues, N; Butler, P H; Signal, T; Williams, J C; Ahmad, M; Ahmed, I; Ahmed, W; Asghar, M I; Awan, M I M; Hoorani, H R; Hussain, I; Khan, W A; Khurshid, T; Muhammad, S; Qazi, S; Shahzad, H; Cwiok, M; Dabrowski, R; Dominik, W; Doroba, K; Konecki, M; Krolikowski, J; Pozniak, K; Romaniuk, Ryszard; Zabolotny, W; Zych, P; Frueboes, T; Gokieli, R; Goscilo, L; Górski, M; Kazana, M; Nawrocki, K; Szleper, M; Wrochna, G; Zalewski, P; Almeida, N; Antunes Pedro, L; Bargassa, P; David, A; Faccioli, P; Ferreira Parracho, P G; Freitas Ferreira, M; Gallinaro, M; Guerra Jordao, M; Martins, P; Mini, G; Musella, P; Pela, J; Raposo, L; Ribeiro, P Q; Sampaio, S; Seixas, J; Silva, J; Silva, P; Soares, D; Sousa, M; Varela, J; Wöhri, H K; Altsybeev, I; Belotelov, I; Bunin, P; Ershov, Y; Filozova, I; Finger, M; Finger, M Jr; Golunov, A; Golutvin, I; Gorbounov, N; Kalagin, V; Kamenev, A; Karjavin, V; Konoplyanikov, V; Korenkov, V; Kozlov, G; Kurenkov, A; Lanev, A; Makankin, A; Mitsyn, V V; Moisenz, P; Nikonov, E; Oleynik, D; Palichik, V; Perelygin, V; Petrosyan, A; Semenov, R; Shmatov, S; Smirnov, V; Smolin, D; Tikhonenko, E; Vasil'ev, S; Vishnevskiy, A; Volodko, A; Zarubin, A; Zhiltsov, V; Bondar, N; Chtchipounov, L; Denisov, A; Gavrikov, Y; Gavrilov, G; Golovtsov, V; Ivanov, Y; Kim, V; Kozlov, V; Levchenko, P; Obrant, G; Orishchin, E; Petrunin, A; Shcheglov, Y; Shchetkovskiy, A; Sknar, V; Smirnov, I; Sulimov, V; Tarakanov, V; Uvarov, L; Vavilov, S; Velichko, G; Volkov, S; Vorobyev, A; Andreev, Yu; Anisimov, A; Antipov, P; Dermenev, A; Gninenko, S; Golubev, N; Kirsanov, M; Krasnikov, N; Matveev, V; Pashenkov, A; Postoev, V E; Solovey, A; Solovey, A; Toropin, A; Troitsky, S; Baud, A; Epshteyn, V; Gavrilov, V; Ilina, N; Kaftanov, V; Kolosov, V; Kossov, M; Krokhotin, A; Kuleshov, S; Oulianov, A; Safronov, G; Semenov, S; Shreyber, I; Stolin, V; Vlasov, E; Zhokin, A; Boos, E; Dubinin, M; Dudko, L; Ershov, A; Gribushin, A; Klyukhin, V; Kodolova, O; Lokhtin, I; Petrushanko, S; Sarycheva, L; Savrin, V; Snigirev, A; Vardanyan, I; Dremin, I; Kirakosyan, M; Konovalova, N; Rusakov, S V; Vinogradov, A; Akimenko, S; Artamonov, A; Azhgirey, I; Bitioukov, S; Burtovoy, V; Grishin, V; Kachanov, V; Konstantinov, D; Krychkine, V; Levine, A; Lobov, I; Lukanin, V; Mel'nik, Y; Petrov, V; Ryutin, R; Slabospitsky, S; Sobol, A; Sytine, A; Tourtchanovitch, L; Troshin, S; Tyurin, N; Uzunian, A; Volkov, A; Adzic, P; Djordjevic, M; Jovanovic, D; Krpic, D; Maletic, D; Puzovic, J; Smiljkovic, N; Aguilar-Benitez, M; Alberdi, J; Alcaraz Maestre, J; Arce, P; Barcala, J M; Battilana, C; Burgos Lazaro, C; Caballero Bejar, J; Calvo, E; Cardenas Montes, M; Cepeda, M; Cerrada, M; Chamizo Llatas, M; Clemente, F; Colino, N; Daniel, M; De La Cruz, B; Delgado Peris, A; Diez Pardos, C; Fernandez Bedoya, C; Fernández Ramos, J P; Ferrando, A; Flix, J; 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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; 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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

    This paper discusses the design and performance of the time measurement technique and of the synchronization systems of the CMS hadron calorimeter. Timing performance results are presented from the Cosmic Run At Four Tesla and LHC beam runs taken in the Autumn of 2008. For hadronic showers of energy greater than 100 GeV, the timing resolution is measured to be about 1.2 ns. The inter-channel synchronization is measured to be within 2 ns.

  5. Liquid Argon Barrel Cryostat Arrived

    CERN Multimedia

    Pailler, P

    Last week the first of three cryostats for the ATLAS liquid argon calorimeter arrived at CERN. It had travelled for 46 days over several thousand kilometers from Japan to CERN. During three years it has been fabricated by Kawasaki Heavy Industries Ltd. at Harima, close to Kobe, under contract from Brookhaven National Laboratory (BNL) of the U.S.. This cryostat consists of two concentric cylinders made of aluminium: the outer vacuum vessel with a diameter of 5.5 m and a length of 7 m, and the inner cold vessel which will contain the electromagnetic barrel calorimeter immersed in liquid argon. The total weight will be 270 tons including the detectors and the liquid argon. The cryostat is now located in building 180 where it will be equipped with 64 feed-throughs which serve for the passage of 122,880 electrical lines which will carry the signals of the calorimeter. After integration of the calorimeter, the solenoidal magnet of ATLAS will be integrated in the vacuum vessel. A final cold test of the cryostat inc...

  6. The CMS forward calorimeter with quartz fibres

    CERN Multimedia

    Laurent Guiraud

    1999-01-01

    Part of the forward hadron calorimeter for the CMS experiment at the LHC is seen here. The calorimeter will be placed at the ends of the experiment barrel to measure the energy of particles produced in the 14 TeV proton-proton collisions. In consists of an iron absorber and specially designed radiation-hard quartz so that it survives the high radiation levels produced by collisions.

  7. Array-scale performance of TES X-ray Calorimeters Suitable for Constellation-X

    Science.gov (United States)

    Kilbourne, C. A.; Bandler, S. R.; Brown, A. D.; Chervenak, J. A.; Eckart, M. E.; Finkbeiner, F. M.; Iyomoto, N.; Kelley, R. L.; Porter, F. S.; Smith, S. J.; Doriese, W. B.; Irwin, K. D.

    2008-01-01

    Having developed a transition-edge-sensor (TES) calorimeter design that enables high spectral resolution in high fill-factor arrays, we now present array-scale results from 32-pixel arrays of identical closely packed TES pixels. Each pixel in such an array contains a Mo/Au bilayer with a transition temperature of 0.1 K and an electroplated Au or Au/Bi xray absorber. The pixels in an array have highly uniform physical characteristics and performance. The arrays are easy to operate due to the range of bias voltages and heatsink temperatures over which solution better than 3 eV at 6 keV can be obtained. Resolution better than 3 eV has also been obtained with 2x8 time-division SQUID multiplexing. We will present the detector characteristics and show spectra acquired through the read-out chain from the multiplexer electronics through the demultiplexer software to real-time signal processing. We are working towards demonstrating this performance over the range of count rates expected in the observing program of the Constellation-X observatory. We mill discuss the impact of increased counting rate on spectral resolution, including the effects of crosstalk and optimal-filtering dead time.

  8. Performance of the CMS electromagnetic calorimeter in Run II and its role in the measurement of the Higgs boson properties

    CERN Document Server

    Organtini, Giovanni

    2017-01-01

    The characterisation of the Higgs boson discovered in 2012 around 125 GeV, and confirmed with the data collected in Run II, requires the precise determination of its mass, width and couplings. The electromagnetic calorimeter (ECAL) of the Compact Muon Solenoid Experiment (CMS) is crucial for measurements in the highest resolution channels, $H\\to \\gamma \\gamma$ and $H\\to 4$ leptons. In particular the energy resolution, the scale uncertainty and the position resolution for electrons and photons are required to be as good as possible.During Run II the LHC is continuously operating with 25 ns bunch spacing and increasing instantaneous luminosity. The calorimeter reconstruction algorithm has been adapted to cope with increasing levels of pile-up and the calibration and monitoring strategy have been optimised to maintain the excellent performance of the CMS ECAL throughout Run II. We show first performance results from the Run II data taking periods, achieved through energy calibrations using physics events, with...

  9. CMS Technical Design Report for the Phase 1 Upgrade of the Hadron Calorimeter

    CERN Document Server

    Mans, J; Dahmes, B; de Barbaro, P; Freeman, J; Grassi, T; Hazen, E; Mans, J; Ruchti, R; Schimdt, I; Shaw, T; Tully, C; Whitmore, J; Yetkin, T

    2012-01-01

    This report describes the technical design and outlines the expected performance of the Phase 1 Upgrade of the CMS Hadron Calorimeters. The upgrade is designed to improve the performance of the calorimeters at high luminosity with large numbers of pileup events by increasing the depth-segmentation of the calorimeter and providing new capabilities for anomalous background rejection. The photodetectors of the CMS Barrel and Endcap Hadron Calorimeters, currently hybrid photodiodes (HPDs), will be replaced by silicon photomultiplier (SiPM) devices. The single-channel phototubes of the Forward Hadron Calorimeter will be replaced by multi-anode phototubes operated in a dual-anode configuration. The readout electronics for all three calorimeter systems will also be replaced. A new charge-integrating ADC, the QIE10, with an integrated TDC will be used along with a 4.8 Gbps data-link. The off-detector electronics will also be substantially upgraded to handle higher data volumes and improve the information sent to the ...

  10. ELECTROMAGNETIC CALORIMETER (ECAL)

    CERN Multimedia

    P. Bloch

    ECAL Barrel (EB) The cabling of the ECAL Barrel services on YB0 was completed early December 2007. The team has now commissioned the complete Barrel. To run all the supermodules in parallel, it is necessary to remove the heat from the service cables on YB0. The corresponding thermal screens are being installed and, for the time being, a max¬imum of 25 supermodules has been run concurrently. EB is read out regularly with a local DAQ as well as with the central DAQ and trigger. The calorimeter trigger has also been commissioned, allowing us to trigger on cosmic muons. ECAL Endcaps (EE) The Endcaps crystal production will be completed before the end of March 2008, as planned. The gluing of the VPTs (Vacuum Photo Triodes) on the crystals and the assembly of Supercrystals (sets of 25 crystals) are proceeding at the pace of 16 Supercrystals (400 channels) per week. Two thirds of the Supercrystals needed for the complete EE have been produced. Their mounting on the Dee backplates (including the connectio...

  11. The CMS ECAL Barrel HV system

    CERN Document Server

    Bartoloni, Alessandro

    2012-01-01

    The CMS electro-magnetic calorimeter comprises 75848 scintillating lead tungstate crystals. 61200 crystals are contained in the ECAL Barrel section and these are readout by avalanche photodiodes (APD) with internal gain. The APD gain strongly depends on the bias voltage that, for a gain G=50, is around 400 V. In order to match the requirements for gain stability, the power supply voltage must be stable to within 0.01\\%. In this talk we describe our experience with the installed Barrel HV power supply system which has been used for data taking at the LHC since 2008.

  12. Periodic position dependence of the energy measured in the CMS electromagnetic calorimeter

    CERN Document Server

    Descamps, Julien

    2006-01-01

    A uniform energy measurement response of the CMS electromagnetic calorimeter ECAL is essential for precision physics at the LHC. The ECAL barrel calorimeter consists of 61200 lead tungstate crystals arranged in a quasi-projective geometry. The energy of photons reaching the ECAL will be reconstructed by summing the channels corresponding to matrices of 3x3 or 5x5 crystals centred on the crystal with the largest energy deposit. The energy measured using such matrices of fixed size has been studied using electron test beam data taken in 2004. The variation of the energy containment with the incident electron impact position on the central crystal leads to a degradation of the energy resolution. A method using only the calorimeter information is presented to correct for the position dependent response. After correction, the energy resolution performance for uniform impact distributions of the electrons on the front face of a crystal approaches that obtained for maximal containment with a central impact. The univ...

  13. Status of the KLOE Electromagnetic Calorimeter: final optimization, progress in construction and first calibration

    Energy Technology Data Exchange (ETDEWEB)

    Antonelli, M.; Anulli, F.; Barbiellini, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Caloi, R.; Cabibbo, G.; Campana, P.; Cervelli, F.; De Zorzi, G.; Di Cosimo, G.; Di Domenico, A.; Erriquez, O.; Di Falco, S.; Farilla, A.; Ferrari, A.; Franzini, P.; Gauzzi, P.; Giovannella, S.; Graziani, E.; Han, S.W.; Incagli, M.; Kim, W.; Lanfranchi, G.; Lee-Franzini, J.; Lomtadze, T.; Miscetti, S.; Murtas, F.; Scuri, F.; Spiriti, E.; Tortora, L.; Venanzoni, G.; Woelfle, S.; Zhang, J.Q. [Bari Univ. (Italy). Dipt. di Fisica]|[INFN, Bari (Italy)]|[Institute of High Energy Physics of Academica Sinica, Beijing (China)]|[Laboratori Nazionali di Frascati dell`INFN, Frascati (Italy)]|[Physics Department, Columbia University, New York (United States)]|[Dipartimento di Fisica dell`Universita e Sezione INFN, Pisa (Italy)]|[Dipartimento di Fisica dell`Universita e Sezione INFN, Roma I (Italy)]|[Dipartimento di Fisica dell`Universita e Sezione INFN, Roma II (Italy)]|[Istituto Superiore di Sanita and Sezione INFN, ISS, Roma (Italy)]|[Physics Department, State University of New York at Stony Brook, Stony Brook, NY (United States)]|[Dipartimento di Fisica dell`Universita e Sezione INFN, Trieste/Udine (Italy)

    1997-03-01

    The design and the status of construction of the KLOE electromagnetic calorimeter are described in this report. 18 out of 24 barrel modules have been fully assembled and more than 50% of the end-cap modules are built. All experimental specifications are fulfilled as shown by the test beam results of the final size prototype. Since the quality of fibers and photomultipliers have gone through improvements, the final calorimeter performances will exceed our expectations. The main parameters of each calorimeter module (light yield, attenuation length and time resolution) are fully surveyed using cosmic rays. Extrapolating the results to electromagnetic showers, a time resolution of 55 ps/{radical}(E(GeV)) and a resolution of 0.9 cm/{radical}(E(GeV)) on the coordinate along the fibers are obtained. An energy resolution of 4.7%/{radical}(E(GeV)) can also be quoted. (orig.).

  14. The design, implementation, and performance of the Atro-H SXS calorimeter array and anti-coincidence detector

    Science.gov (United States)

    Kilbourne, Caroline A.; Adams, Joseph S.; Brekosky, Regis P.; Chervenak, James A.; Chiao, Meng P.; Eckart, Megan E.; Figueroa-Feliciano, Enectali; Galeazzi, Massimiliano; Grein, Christoph; Jhabvala, Christine A.; Kelley, Richard L.; Kelly, Daniel P.; Leutenegger, Maurice A.; McCammon, Dan; Porter, F. S.; Szymkowiak, Andrew E.; Watanabe, Tomomi; Zhao, Jun

    2016-07-01

    The calorimeter array of the JAXA Astro-H (renamed Hitomi) Soft X-ray Spectrometer (SXS) was designed to provide unprecedented spectral resolution of spatially extended cosmic x-ray sources and of all cosmic x-ray sources in the Fe-K band around 6 keV, enabling essential plasma diagnostics. The SXS has a square array of 36 microcalorimeters at the focal plane. These calorimeters consist of ion-implanted silicon thermistors and HgTe thermalizing x-ray absorbers. These devices have demonstrated a resolution of better than 4.5 eV at 6 keV when operated at a heat-sink temperature of 50 mK. We will discuss the basic physical parameters of this array, including the array layout, thermal conductance of the link to the heat sink, resistance function, absorber details, and means of attaching the absorber to the thermistorbearing element. We will also present the thermal characterization of the whole array, including thermal conductance and crosstalk measurements and the results of pulsing the frame temperature via alpha particles, heat pulses, and the environmental background. A silicon ionization detector is located behind the calorimeter array and serves to reject events due to cosmic rays. We will briefly describe this anti-coincidence detector and its performance.

  15. The Design, Implementation, and Performance of the Astro-H SXS Calorimeter Array and Anti-Coincidence Detector

    Science.gov (United States)

    Kilbourne, Caroline A.; Adams, Joseph S.; Brekosky, Regis P.; Chiao, Meng P.; Chervenak, James A.; Eckart, Megan E.; Figueroa-Feliciano, Enectali; Galeazzi, Masimilliano; Grein, Christoph; Jhabvala, Christine A.; hide

    2016-01-01

    The calorimeter array of the JAXA Astro-H (renamed Hitomi) Soft X-ray Spectrometer (SXS) was designed to provide unprecedented spectral resolution of spatially extended cosmic x-ray sources and of all cosmic x-ray sources in the Fe-K band around 6 keV, enabling essential plasma diagnostics. The SXS has a square array of 36 microcalorimeters at the focal plane. These calorimeters consist of ion-implanted silicon thermistors and HgTe thermalizing x-ray absorbers. These devices have demonstrated a resolution of better than 4.5 eV at 6 keV when operated at a heat-sink temperature of 50 mK. We will discuss the basic physical parameters of this array, including the array layout, thermal conductance of the link to the heat sink, resistance function, absorber details, and means of attaching the absorber to the thermistor-bearing element. We will also present the thermal characterization of the whole array, including thermal conductance and crosstalk measurements and the results of pulsing the frame temperature via alpha particles, heat pulses, and the environmental background. A silicon ionization detector is located behind the calorimeter array and serves to reject events due to cosmic rays. We will briefly describe this anti-coincidence detector and its performance.

  16. Performance of the ATLAS forward calorimeter and search for the invisible Higgs via vector boson fusion at ATLAS

    CERN Document Server

    Schram, Malachi

    2008-01-01

    The ATLAS detector will examine proton-proton collisions at 14 TeV provided by CERN's Large Hadron Collider (LHC). ATLAS is a general purpose detector with tracking, calorime- try and a large muon system. The calorimeter system provides hermetic coverage of a large fraction of the solid angle of the detector. In the region close to the beam line, the calorimeter components are the FCal detectors which provide additional rj coverage im- proving the jet tagging efficiency and the missing energy resolution. The performance of the FCal calorimeter for both electrons and hadrons is one of the major topics of this thesis. The measured electromagnetic response for the FCal 1 module was 12.14±0.06 ADC/GeV which is in good agreement with the predicted value of 12 ADC/GeV from IE the simulation which will be used to provide the initial electromagnetic response for the FCal modules during the early stages of ATLAS data taking. The hadronic per- formance was investigated using two calibration schemes: flat weights and t...

  17. ATLAS: First rehearsal for the tile calorimeter

    CERN Multimedia

    2003-01-01

    The dry run assembly of the first barrel of the ATLAS tile hadron calorimeter has been successfully completed. It is now being dismantled again so that it can be lowered into the ATLAS cavern where it will be reassembled in October 2004.

  18. The ATLAS Tile Calorimeter gets into shape!

    CERN Multimedia

    2002-01-01

    The last of the 64 modules for one of the ATLAS Hadron tile calorimeter barrels has just arrived at CERN. This arrival puts an end to two and a half years work assembling and testing all the modules in the Institut de Física d'Altes Energies (IFAE), in Barcelona.

  19. 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.

  20. Performance of the ATLAS Hadronic End-Cap Calorimeter in Beam Tests

    CERN Document Server

    Dowler, B; Soukup, J; Vincter, M G; Cheplakov, A P; Datskov, V I; Fedorov, A; Javadov, N; Kalinnikov, V; Kakurin, S; Kazarinov, M; Kukhtin, V; Ladygin, E; Lazarev, A B; Neganov, A B; Pisarev, I; Serochkin, E; Shilov, S N; Shalyugin, A N; Usov, Yu; Bán, J; Bruncko, Dusan; Chytracek, R; Jusko, A; Kladiva, E; Strízenec, P; Gärtner, V; Hiebel, S; Hohlfeld, M; Jakobs, K; Köpke, L; Marschalkowski, E; Meder, D; Othegraven, R; Schäfer, U; Thomas, J; Walkowiak, W; Zeitnitz, C; Leroy, C; Mazini, R; Mehdiyev, R; Akimov, A; Blagov, M I; Komar, A; Snesarev, A A; Speransky, M N; Sulin, V; Yakimenko, M; Aderholz, M; Brettel, H; Cwienk, W D; Dulny, B; Fent, J; Fischer, A; Haberer, W; Huber, J; Huber, R; Karev, A; Kiryunin, A E; Kobler, T; Kurchaninov, L L; Laskus, H; Lindenmayer, M; Mooshofer, P; Oberlack, H; Salihagic, D; Schacht, P; Stenzel, H; Striegel, D; Tribanek, W; Chekulaev, S V; Denisov, S; Levitsky, M; Minaenko, A A; Mitrofanov, G Ya; Moiseev, A; Pleskatch, A; Sytnik, V V; Benoit, P; Hoyle, K; Honma, A; Maharaj, R; Oram, C J; Pattyn, E; Rosvick, M; Sbarra, C; Wellisch, H P; Wielers, M; Birney, P; Dobbs, M; Fincke-Keeler, M; Fortin, D; Hodges, T; Keeler, Richard K; Langstaf, R; Lefebvre, M; Lenckowski, M; McPherson, R A; O'Neil, D C; Forbush, D

    2002-01-01

    Modules of the ATLAS liquid argon Hadronic End-cap calorimeter (HEC) were exposed to beams of electrons, muons and pions in the energy range 6GeV

  1. Performance of the ATLAS electromagnetic calorimeter end-cap module 0

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.; Ballansat, J.; Bazan, A.; Beaugiraud, B.; Boniface, J.; Chollet, F.; Colas, J.; Delebecque, P.; Di Ciaccio, L.; Dumont-Dayot, N.; El Kacimi, M.; Gaumer, O.; Ghez, P.; Girard, C.; Gouanere, M.; Kambara, H.; Jeremie, A.; Jezequel, S.; Lafaye, R.; Leflour, T.; Le Maner, C.; Lesueur, J.; Massol, N.; Moynot, M.; Neukermans, L.; Perrodo, P.; Perrot, G.; Poggioli, L.; Prast, J.; Przysiezniak, H.; Riccadona, X.; Sauvage, G.; Thion, J.; Wingerter-Seez, I.; Zitoun, R.; Zolnierowski, Y.; Chen, H.; Citterio, M.; Farrell, J.; Gordon, H.; Hackenburg, B.; Hoffman, A.; Kierstead, J.; Lanni, F.; Leite, M.; Lissauer, D.; Ma, H.; Makowiecki, D.; Radeka, V.; Rahm, D.; Rajagopalan, S.; Rescia, S.; Stumer, I.; Takai, H.; Yip, K.; Benchekroun, D.; Driouichi, C.; Hoummada, A.; Hakimi, M.; Stroynowski, R.; Ye, J.; Beck Hansen, J.; Belymam, A.; Bremer, J.; Chevalley, J.L.; Fassnacht, P.; Gianotti, F.; Hervas, L.; Marin, C.P.; Pailler, P.; Schilly, P.; Seidl, W.; Vossebeld, J.; Vuillemin, V.; Clark, A.; Efthymiopoulos, I.; Moneta, L.; Belhorma, B.; Collot, J.; Ferrari, A.; Gallin-Martel, M.L.; Hostachy, J.Y.; Martin, P.; Ohlsson-Malek, F.; Saboumazrag, S.; Ban, J.; Cartiglia, N.; Cunitz, H.; Dodd, J.; Gara, A.; Leltchouk, M.; Negroni, S.; Parsons, J.A.; Seman, M.; Simion, S.; Sippach, W.; Willis, W.; Barreiro, F.; Garcia, G.; Labarga, L.; Rodier, S.; Peso, J. del; Alexa, C.; Barrillon, P.; Benchouk, C.; Chekhtman, A.; Dinkespiler, B.; Djama, F.; Duval, P.Y.; Henry-Couannier, F.; Hinz, L.; Jevaud, M.; Karst, P.; Le Van Suu, A.; Martin, L.; Martin, O.; Mirea, A.; Monnier, E.; Nagy, E.; Nicod, D.; Olivier, C.; Pralavorio, P. E-mail: pralavor@cppm.in2p3.fr; Repetti, B.; Raymond, M.; Sauvage, D.; Tisserant, S.; Toth, J.; Wielers, M.; Battistoni, G.; Carminati, L.; Costa, G.; Delmastro, M.; Fanti, M.; Mandelli, L.; Mazzanti, M.; Tartarelli, G.F.; Aulchenko, V.; Kazanin, V.; Kolachev, G.; Malyshev, V.; Maslennikov, A.; Pospelov, G.; Snopkov, R.; Shousharo, A.; Talyshev, A. [and others

    2003-03-11

    The construction and beam test results of the ATLAS electromagnetic end-cap calorimeter pre-production module 0 are presented. The stochastic term of the energy resolution is between 10% and 12.5% GeV{sup 1/2} over the full pseudorapidity range. Position and angular resolutions are found to be in agreement with simulation. A global constant term of 0.6% is obtained in the pseudorapidity range 2.5<{eta}<3.2 (inner wheel)

  2. Performance of the ATLAS electromagnetic calorimeter end-cap module 0

    Science.gov (United States)

    Aubert, B.; Ballansat, J.; Bazan, A.; Beaugiraud, B.; Boniface, J.; Chollet, F.; Colas, J.; Delebecque, P.; Di Ciaccio, L.; Dumont-Dayot, N.; El Kacimi, M.; Gaumer, O.; Ghez, P.; Girard, C.; Gouanère, M.; Kambara, H.; Jérémie, A.; Jézéquel, S.; Lafaye, R.; Leflour, T.; Le Maner, C.; Lesueur, J.; Massol, N.; Moynot, M.; Neukermans, L.; Perrodo, P.; Perrot, G.; Poggioli, L.; Prast, J.; Przysiezniak, H.; Riccadona, X.; Sauvage, G.; Thion, J.; Wingerter-Seez, I.; Zitoun, R.; Zolnierowski, Y.; Chen, H.; Citterio, M.; Farrell, J.; Gordon, H.; Hackenburg, B.; Hoffman, A.; Kierstead, J.; Lanni, F.; Leite, M.; Lissauer, D.; Ma, H.; Makowiecki, D.; Radeka, V.; Rahm, D.; Rajagopalan, S.; Rescia, S.; Stumer, I.; Takai, H.; Yip, K.; Benchekroun, D.; Driouichi, C.; Hoummada, A.; Hakimi, M.; Stroynowski, R.; Ye, J.; Beck Hansen, J.; Belymam, A.; Bremer, J.; Chevalley, J. L.; Fassnacht, P.; Gianotti, F.; Hervas, L.; Marin, C. P.; Pailler, P.; Schilly, P.; Seidl, W.; Vossebeld, J.; Vuillemin, V.; Clark, A.; Efthymiopoulos, I.; Moneta, L.; Belhorma, B.; Collot, J.; Ferrari, A.; Gallin-Martel, M. L.; Hostachy, J. Y.; Martin, P.; Ohlsson-Malek, F.; Saboumazrag, S.; Ban, J.; Cartiglia, N.; Cunitz, H.; Dodd, J.; Gara, A.; Leltchouk, M.; Negroni, S.; Parsons, J. A.; Seman, M.; Simion, S.; Sippach, W.; Willis, W.; Barreiro, F.; Garcia, G.; Labarga, L.; Rodier, S.; del Peso, J.; Alexa, C.; Barrillon, P.; Benchouk, C.; Chekhtman, A.; Dinkespiler, B.; Djama, F.; Duval, P. Y.; Henry-Couannier, F.; Hinz, L.; Jevaud, M.; Karst, P.; Le Van Suu, A.; Martin, L.; Martin, O.; Mirea, A.; Monnier, E.; Nagy, E.; Nicod, D.; Olivier, C.; Pralavorio, P.; Repetti, B.; Raymond, M.; Sauvage, D.; Tisserant, S.; Toth, J.; Wielers, M.; Battistoni, G.; Carminati, L.; Costa, G.; Delmastro, M.; Fanti, M.; Mandelli, L.; Mazzanti, M.; Tartarelli, G. F.; Aulchenko, V.; Kazanin, V.; Kolachev, G.; Malyshev, V.; Maslennikov, A.; Pospelov, G.; Snopkov, R.; Shousharo, A.; Talyshev, A.; Tikhonov, Yu; Augé, E.; Bourdarios, C.; Breton, D.; Bonivento, W.; Cros, P.; de La Taille, C.; Falleau, I.; Fournier, D.; Guilhem, G.; Hassani, S.; Jacquier, Y.; Kordas, K.; Macé, G.; Merkel, B.; Noppe, J. M.; Parrour, G.; Pétroff, P.; Puzo, P.; Richer, J. P.; Rousseau, D.; Seguin-Moreau, N.; Serin, L.; Tocut, V.; Veillet, J. J.; Zerwas, D.; Astesan, F.; Bertoli, W.; Camard, A.; Canton, B.; Fichet, S.; Hubaut, F.; Imbault, D.; Lacour, D.; Laforge, B.; Le Dortz, O.; Martin, D.; Nikolic-Audit, I.; Orsini, F.; Rossel, F.; Schwemling, P.; Cleland, W.; McDonald, J.; Abouelouafa, E. M.; Ben Mansour, A.; Cherkaoui, R.; El Mouahhidi, Y.; Ghazlane, H.; Idrissi, A.; Belorgey, J.; Bernard, R.; Chalifour, M.; Le Coroller, A.; Ernwein, J.; Mansoulié, B.; Renardy, J. F.; Schwindling, J.; Taguet, J.-P.; Teiger, J.; Clément, C.; Lund-Jensen, B.; Lundqvist, J.; Megner, L.; Pearce, M.; Rydstrom, S.; Egdemir, J.; Engelmann, R.; Hoffman, J.; McCarthy, R.; Rijssenbeek, M.; Steffens, J.; This paper is dedicated to the memory of our colleague Dominique Sauvage, actively involved in the detector construction; beam test activities, who died accidentaly on March 16, 2002.

    2003-03-01

    The construction and beam test results of the ATLAS electromagnetic end-cap calorimeter pre-production module 0 are presented. The stochastic term of the energy resolution is between 10% and 12.5% GeV1/2 over the full pseudorapidity range. Position and angular resolutions are found to be in agreement with simulation. A global constant term of 0.6% is obtained in the pseudorapidity range 2.5< η<3.2 (inner wheel).

  3. Performance of the ATLAS hadronic end-cap calorimeter in beam tests

    Energy Technology Data Exchange (ETDEWEB)

    Dowler, B.; Pinfold, J.; Soukup, J.; Vincter, M.; Cheplakov, A.; Datskov, V.; Fedorov, A.; Javadov, N.; Kalinnikov, V.; Kakurin, S.; Kazarinov, M.; Kukhtin, V.; Ladygin, E.; Lazarev, A.; Neganov, A.; Pisarev, I.; Serochkin, E.; Shilov, S.; Shalyugin, A.; Usov, Yu.; Ban, J.; Bruncko, D.; Chytracek, R.; Jusko, A.; Kladiva, E.; Strizenec, P.; Gaertner, V.; Hiebel, S.; Hohlfeld, M.; Jakobs, K.; Koepke, L.; Marschalkowski, E.; Meder, D.; Othegraven, R.; Schaefer, U.; Thomas, J.; Walkowiak, W.; Zeitnitz, C.; Leroy, C.; Mazini, R.; Mehdiyev, R.; Akimov, A.; Blagov, M.; Komar, A.; Snesarev,