Database Foundation For The Configuration Management Of The CERN Accelerator Controls Systems

CERN Document Server

Zaharieva, Z; Peryt, M

2011-01-01

The Controls Configuration Database (CCDB) and its interfaces have been developed over the last 25 years in order to become nowadays the basis for the Configuration Management of the Controls System for all accelerators at CERN. The CCDB contains data for all configuration items and their relationships, required for the correct functioning of the Controls System. The configuration items are quite heterogeneous, depicting different areas of the Controls System – ranging from 3000 Front-End Computers, 75 000 software devices allowing remote control of the accelerators, to valid states of the Accelerators Timing System. The article will describe the different areas of the CCDB, their interdependencies and the challenges to establish the data model for such a diverse configuration management database, serving a multitude of clients. The CCDB tracks the life of the configuration items by allowing their clear identification, triggering of change management processes as well as providing status accounting and aud...

Rejuvenating CERN's Accelerators

CERN Multimedia

2004-01-01

In the coming years and especially in 2005, CERN's accelerators are going to receive an extensive renovation programme to ensure they will perform reliably and effectively when the LHC comes into service.

The CERN Accelerator School

CERN Multimedia

2016-01-01

Introduction to accelerator physics The CERN Accelerator School: Introduction to Accelerator Physics, which should have taken place in Istanbul, Turkey, later this year has now been relocated to Budapest, Hungary.  Further details regarding the new hotel and dates will be made available as soon as possible on a new Indico site at the end of May.

CERN Accelerator School - Beam injection, extraction and transfer

CERN Multimedia

2016-01-01

Registration is now open for the CERN Accelerator School’s specialised course to be held in Erice, Italy, from 10 to 19 March, 2017.   The course will be of interest to staff and students in accelerator laboratories, university departments and companies manufacturing accelerator who wish to learn about accelerator science and technology. Further information can be found at: http://indico.cern.ch/event/451905/ http://cas.web.cern.ch/cas/IET2017/IET-advert.html

JACoW Decoupling CERN accelerators

CERN Document Server

Dworak, Andrzej

2018-01-01

The accelerator complex at CERN is a living system. Accelerators are being dismantled, upgraded or change their purpose. New accelerators are built. The changes do not happen overnight, but when they happen they may require profound changes across the handling systems. Central timings (CT), responsible for sequencing and synchronization of accelerators, are good examples of such systems. This paper shows how over the past twenty years the changes and new requirements influenced the evolution of the CTs. It describes experience gained from using the Central Beam and Cycle Manager (CBCM) CT model, for strongly coupled accelerators, and how it led to a design of a new Dynamic Beam Negotiation (DBN) model for the AD and ELENA accelerators, which reduces the coupling, increasing accelerator independence. The paper ends with an idea how to merge strong points of both models in order to create a single generic system able to efficiently handle all CERN accelerators and provide more beam time to experiments and LHC.

CAS CERN Accelerator School: Advanced accelerator physics. Proceedings. Vol. 2

International Nuclear Information System (INIS)

Turner, S.

1987-01-01

This advanced course on general accelerator physics is the second of the biennial series given by the CERN Accelerator School and follows on from the first basic course given at Gif-sur-Yvette, Paris, in 1984. Stress is placed on the mathematical tools of Hamiltonian mechanics and the Vlasov and Fokker-Planck equations, which are widely used in accelerator theory. The main topics treated in this present work include: nonlinear resonances, chromaticity, motion in longitudinal phase space, growth and control of longitudinal and transverse beam emittance, space-charge effects and polarization. The seminar programme treats some specific accelerator techniques, devices, projects and future possibilities. (orig.)

CAS - CERN Accelerator School: Power Converters

CERN Document Server

2015-01-01

These proceedings collate lectures given at the twenty-eighth specialized course organised by the CERN Accelerator School (CAS). The course was held at the Hotel du Parc, Baden, Switzerland from 7 - 14 May 2014, in collaboration with the Paul Scherrer Institute. Following introductory lectures on accelerators and the requirements on power converters, the course covered components and topologies of the different types of power converters needed for particle accelerators. Issues of design, control and exploitation in a sometimes-hostile environment were addressed. Site visits to ABB and PSI provided an insight into state-of-the-art power converter production and operation, while topical seminars completed the programme.

Database foundation for the configuration management of the CERN accelerator controls systems

International Nuclear Information System (INIS)

Zaharieva, Z.; Martin Marquez, M.; Peryt, M.

2012-01-01

The Controls Configuration Database (CCDB) and its interfaces have been developed over the last 25 years in order to become nowadays the basis for the Configuration Management of the Control System for all accelerators at CERN. The CCDB contains data for all configuration items and their relationships, required for the correct functioning of the Control System. The configuration items are quite heterogeneous, depicting different areas of the Control System - ranging from 3000 Front-End Computers, 75000 software devices allowing remote control of the accelerators, to valid states of the Accelerators Timing System. The article will describe the different areas of the CCDB, their inter-dependencies and the challenges to establish the data model for such a diverse configuration management database, serving a multitude of clients. The CCDB tracks the life of the configuration items by allowing their clear identification, triggering of change management processes as well as providing status accounting and audits. This required the development and implementation of a combination of tailored processes and tools. The Controls System is a data-driven one - the data stored in the CCDB is extracted and propagated to the controls hardware in order to configure it remotely. Therefore a special attention is placed on data security and data integrity as an incorrectly configured item can have a direct impact on the operation of the accelerators. (authors)

Meet the winner artists of Accelerate@CERN Taiwan | 3 February

CERN Multimedia

2016-01-01

The winners of Accelerate@CERN Taiwan are WenChi Su (left) and Pei-Ying Lin (right). Accelerate@CERN is the country-specific, one-month research award for artists who have never been in a science laboratory before. Accelerate@CERN Taiwan, is funded by the Ministry of Culture for Taiwan. From within thirty outstanding applicants, the winners of Accelerate@CERN Taiwan are WenChi Su - dancer and choreographer - and Pei-Ying Lin - digital artist. This is the first opportunity for two talented artists to work and research together on the joint creation of a new dance project which engages with the digital realm and is inspired by the world of particle physics. In the past month they have been exploring CERN together, and now they are working on their project. Meet the artists on Wednesday 3 February at 4:30 p.m. in Restaurant 1. For more information on Accelerate@CERN, see here. Follow the artists blog to know what they have been doing for the past month at CERN.

CAS CERN Accelerator School. Third advanced accelerator physics course

International Nuclear Information System (INIS)

Turner, S.

1990-01-01

The third version of the CERN Accelerator School's (CAS) advanced course on General Accelerator Physics was given at Uppsala University from 18-29 September, 1989. Its syllabus was based on the previous courses held in Oxford, 1985 and Berlin, 1987 whose proceedings were published as CERN Yellow Reports 87-03 and 89-01 respectively. However, the opportunity was taken to emphasize the physics of small accelerators and storage rings, to present some topics in new ways, and to introduce new seminars. Thus the lectures contained in the present volume include chromaticity, dynamic aperture, kinetic theory, Landau damping, ion-trapping, Schottky noise, laser cooling and small ring lattice problems while the seminars include interpretation of numerical tracking, internal targets and living with radiation. (orig.)

CAS CERN Accelerator School: Fourth general accelerator physics course

International Nuclear Information System (INIS)

Turner, S.

1991-01-01

The fourth CERN Accelerator School (CAS) basic course on General Accelerator Physics was given at KFA, Juelich, from 17 to 28 September 1990. Its syllabus was based on the previous similar courses held at Gif-sur-Yvette in 1984, Aarhus 1986, and Salamanca 1988, and whose proceedings were published as CERN Reports 85-19, 87-10, and 89-05, respectively. However, certain topics were treated in a different way, improved or extended, while new subjects were introduced. All of these appear in the present proceedings, which include lectures or seminars on the history and applications of accelerators, phase space and emittance, chromaticity, beam-beam effects, synchrotron radiation, radiation damping, tune measurement, transition, electron cooling, the designs of superconducting magnets, ring lattices, conventional RF cavities and ring RF systems, and an introduction to cyclotrons. (orig.)

The CERN Control Centre is up and running!

CERN Multimedia

Maximilien Brice

2006-01-01

The CERN Control Centre (CCC) that combines all the control rooms for the accelerators, the cryogenic system and the technical infrastructure came into operation on 1st February. On 1st February, at 2.00 p.m., Patrick Villeton Pachot started the first Technical Infrastructure shift at the brand new CERN Control Centre.

A great start for the whole CERN accelerator chain

CERN Multimedia

2016-01-01

With physics data-taking under way this week at the LHC, I’d like to take a look at what’s been happening at the rest of the CERN accelerator chain.   The LHC tends to dominate the news from CERN for all kinds of reasons, beech martens included, but we should not forget that there is a unique chain of accelerators upstream of the LHC, tended to and operated by an incredible group of people. If our whole accelerator chain does not work perfectly, nor can the LHC, and in addition to forming the LHC’s injector chain, our upstream accelerators support their own experiments, bringing great diversity to the CERN research programme. The chain begins with the proton source and Linac2, which have been faithfully delivering beams since 1978. This year, Linac2 accelerated its first beams on 29 February. Beams were then passed on to the PS Booster and the veteran PS, the linchpin of the CERN accelerator complex and in operation since 1959. The final link in the chain before the ...

CERN Accelerator School | 26 May – 5 June 2015

CERN Multimedia

2014-01-01

The CERN Accelerator School in collaboration with MedAustron, Wiener Neustadt, Austria is organising a specialised school on Accelerators for Medical Applications in the Eventhotel Pyramide, Vösendorf, Austria, from 26 May – 5 June 2015. Please note that the deadline for applications is 20 January 2015. More details can be found at the following sites: http://cas.web.cern.ch/cas/Austria2015/Vienna-­‐advert.html http://indico.cern.ch/event/324187/ For further information please contact Barbara.strasser@cern.ch

CERN Accelerator School: Cyclotrons, linacs and applications

International Nuclear Information System (INIS)

Wilson, E.J.N.

1994-01-01

When the CERN Accelerator School (CAS) was set up over ten years ago it was expected that its job of training a new generation of accelerator scientists would slacken off after a few years as recruitment eased back. It has therefore been a puzzle to explain why, a decade later, there is still a steady flow of 200 or 300 participants a year coming to CAS Courses. The explanation seems to be that the ''graduates'' are from the many laboratories considerably smaller than CERN and from university physics departments and hospitals where accelerators are used. There are also factories and even production lines where small accelerators are produced

Proceedings of CAS - CERN Accelerator School: Advanced Accelerator Physics Course

International Nuclear Information System (INIS)

Herr, W

2014-01-01

This report presents the proceedings of the Course on Advanced Accelerator Physics organized by the CERN Accelerator School. The course was held in Trondheim, Norway from 18 to 29 August 2013, in collaboration with the Norwegian University of Science and Technology. Its syllabus was based on previous courses and in particular on the course held in Berlin 2003 whose proceedings were published as CERN Yellow Report CERN-2006-002. The field has seen significant advances in recent years and some topics were presented in a new way and other topics were added. The lectures were supplemented with tutorials on key topics and 14 hours of hands on courses on Optics Design and Corrections, RF Measurement Techniques and Beam Instrumentation and Diagnostics. These courses are a key element of the Advanced Level Course

CAS CERN Accelerator School third general accelerator physics course

International Nuclear Information System (INIS)

Turner, S.

1989-01-01

The general course on accelerator physics given in Salamanca, Spain, closely followed those organised by the CERN Accelerator School at Gif-sur-Yvette, Paris in 1984, and at Aarhus, Denmark in 1986 and whose proceedings were published as CERN Yellow Reports 85-19 (1985) and 87-10 (1987) respectively. However, certain topics were treated in a different way, improved or extended, while some new ones were introduced and it is all of these which are included in the present proceedings. The lectures include beam-cooling concepts, Liouville's theorem and emittance, emittance dilution in transfer lines, weak-betatron coupling, diagnostics, while the seminars are on positron and electron sources, linac structures and the LEP L3 experiment, together with industrial aspects of particle accelerators. Also included are errata and addenda to the Yellow Reports mentioned above. (orig.)

Engineering a large application software project: the controls of the CERN PS accelerator complex

International Nuclear Information System (INIS)

Benincasa, G.P.; Daneels, A.; Heymans, P.; Serre, Ch.

1985-01-01

The CERN PS accelerator complex has been progressively converted to full computer controls without interrupting its full-time operation (more than 6000 hours per year with on average not more than 1% of the total down-time due to controls). The application software amounts to 120 man-years and 450'000 instructions: it compares with other large software projects, also outside the accelerator world: e.g. Skylab's ground support software. This paper outlines the application software structure which takes into account technical requirements and constraints (resulting from the complexity of the process and its operation) and economical and managerial ones. It presents the engineering and management techniques used to promote implementation, testing and commissioning within budget, manpower and time constraints and concludes with experience gained

CAS CERN Accelerator School. Measurement and alignment of accelerator and detector magnets. Proceedings

International Nuclear Information System (INIS)

Turner, S.

1998-01-01

These proceedings present the lectures given at the eleventh specialised course organised by the CERN Accelerator School (CAS), the topic this time being 'Measurement and Alignment of Accelerator and Detector Magnets'. A similar course was already presented at Montreux, Switzerland in 1992 and its proceedings published as CERN 92-05. However recent progress in the field, especially in the use of superconducting magnets, has been so rapid that a revised course had become imperative. The lectures start with basic magnet theory and the motivation for magnet measurements followed by a review of superconducting magnets and their field dynamics. After a review of measurement methods, the details of search and harmonic coils, magnetic resonance techniques and Hall generators are given followed by methods to minimise errors in mechanical equipment, series production and detector magnet measurements. Turning to magnet metrology and alignment, first data quality control is explained followed by the setting of reference targets, and the alignment methods for accelerators and experiments including alignment by feedback. Finally seminars are presented on the biological effects of magnetic fields and on superconducting magnet fabrication and quality control. (orig.)

CASE in CERN's accelerator sector

International Nuclear Information System (INIS)

Albrecht, A.; Cabas-Alonso, A.; Chevrier, F.

1992-01-01

As in the software industry where computer aided software engineering (CASE) methodologies and tools are commonly used, CERN endeavours to introduce this technology to improve the efficiency of designing, producing and maintaining software. A large project is currently under development in the administrative area whereas a dedicated group had been set up to evaluate state of the art techniques for software development relating to physics experiments. A similar activity, though on a smaller scale, has been initiated in the accelerator sector also in view of the large amount of software that will be required by the LEP200 and the LHC projects. This paper briefly describes this technology and gives an account of current experience with the use of CASE methods and tools for technical projects in the accelerator sector at CERN. (author)

CAS CERN Accelerator School: Power converters for particle accelerators

International Nuclear Information System (INIS)

Turner, S.

1990-01-01

This volume presents the proceedings of the fifth specialized course organized by the CERN Accelerator School, the subject on this occasion being power converters for particle accelerators. The course started with lectures on the classification and topologies of converters and on the guidelines for achieving high performance. It then went on to cover the more detailed aspects of feedback theory, simulation, measurements, components, remote control, fault diagnosis and equipment protection as well as systems and grid-related problems. The important topics of converter specification, procurement contract management and the likely future developments in semiconductor components were also covered. Although the course was principally directed towards DC and slow-pulsed supplies, lectures were added on fast converters and resonant excitation. Finally the programme was rounded off with three seminars on the related fields of Tokamak converters, battery energy storage for electric vehicles, and the control of shaft generators in ships. (orig.)

Discovery Mondays "Controlling the accelerators: tracking the protons"

CERN Multimedia

2007-01-01

Le Centre de contrôle des accélérateurs du CERN.Like a train of particles that picks up speed every time it passes a set of points, by the time they collide the protons and ions in the LHC will have followed their path through the six stages of the CERN accelerator complex, picking up speed at each stage. Operating the controls of this huge complex designed to accelerate the infinitesimally small are its peerless controllers. From the CERN Control Centre, they will be on duty day and night to accelerate the "wagon-loads" of particles, ensuring that they stay on track and lining them up for head-on collisions. At the next Discovery Monday you will discover the path taken by the particles through the accelerator chain. You will gain an insight into the complex work performed by those controlling the particles and learn more about the CERN accelerator complex and its Control Centre. Hop on board for a speed-of-light tour of the C...

Operation Statistics of the CERN Accelerators Complex for 2003

CERN Document Server

CERN. Geneva; Baird, S A; Rey, A; Steerenberg, R; CERN. Geneva. AB Department

2004-01-01

This report gives an overview of the performance of the different Accelerators (Linacs, PS Booster, PS, AD and SPS) of the CERN Accelerator Complex for 2003. It includes scheduled activities, beam availabilities, beam intensities and an analysis of faults and breakdowns by system and by beam. MORE INFORATION by using the OP Statistics Tool: http://eLogbook.web.cern.ch/eLogbook/statistics.php and on the SPS HomePage: http://ab-div-op-sps.web.cern.ch/ab-div-op-sps/SPSss.html

Full steam ahead for the CERN Accelerator School

CERN Multimedia

2003-01-01

The CERN Accelerator School (CAS), now in its 20th year, has a new head, Daniel Brandt. Here he talks to the Bulletin about the most recent school, which was held in collaboration with the Paul Scherrer Institute (PSI), and about the school's future. The CERN Accelerator School has been running since 1983. It holds training courses for accelerator physicists and engineers twice a year, with a pattern of introductory, intermediate and specialised courses. The courses, which take place in different Member States, consist of a programme of lectures and tutorials spread over a period of one or two weeks. Participants come from Member States and other countries world-wide. This year, CAS has a new head, Daniel Brandt, who has taken over from Ted Wilson. Brandt, an accelerator physicist, has been at CERN since 1981, working on aspects of LEP from the early days of design, and throughout most of its operation. More recently his responsibilities have included the LHC Heavy Ions Programme (Heavy Ions in the LHC). Th...

Quality Management of CERN Vacuum Controls

CERN Document Server

Antoniotti, F; Fortescue-Beck, E; Gama, J; Gomes, P; Le Roux, P; Pereira, H F; Pigny, G

2014-01-01

The vacuum controls Section (TE-VSC-ICM) is in charge of the monitoring, maintenance and consolidation of the control systems of all accelerators and detectors in CERN; this represents 6 000 instruments distributed along 128 km of vacuum chambers, often of heterogeneous architectures and of diverse

CAS CERN Accelerator School: Superconductivity in particle accelerators. Proceedings

Energy Technology Data Exchange (ETDEWEB)

Turner, S [ed.

1996-05-01

These proceedings present the lectures given at the ninth specialized course organized by the CERN Accelerator School (CAS), the topic this time being ``Superconductivity in Particle Accelerators``. This course is basically a repeat of that given at the same location in 1988 whose proceedings were published as CERN 89-04. However, the opportunity was taken to improve the presentation of the various topics and to introduce the latest developments in this rapidly expanding field. First the basic theory of superconductivity is introduced. A review of the materials used for sc magnetics is followed by magnet design requirements, the influence of eddy and persistent currents, and the methods used to provide quench protection. Next follows the basic theory of sc cavities, their materials, high-gradient limitations, the problem of field emission and then their power couplers. After an introduction to cryogenics and cryoplants, the theory of superfluidity is presented followed by a review of the use of superfluid helium. Finally, two seminars detail the impact of superconductors in the design of the LHC and LEP2 accelerators. (orig.).

CAS CERN Accelerator School: Superconductivity in particle accelerators. Proceedings

International Nuclear Information System (INIS)

Turner, S.

1996-05-01

These proceedings present the lectures given at the ninth specialized course organized by the CERN Accelerator School (CAS), the topic this time being ''Superconductivity in Particle Accelerators''. This course is basically a repeat of that given at the same location in 1988 whose proceedings were published as CERN 89-04. However, the opportunity was taken to improve the presentation of the various topics and to introduce the latest developments in this rapidly expanding field. First the basic theory of superconductivity is introduced. A review of the materials used for sc magnetics is followed by magnet design requirements, the influence of eddy and persistent currents, and the methods used to provide quench protection. Next follows the basic theory of sc cavities, their materials, high-gradient limitations, the problem of field emission and then their power couplers. After an introduction to cryogenics and cryoplants, the theory of superfluidity is presented followed by a review of the use of superfluid helium. Finally, two seminars detail the impact of superconductors in the design of the LHC and LEP2 accelerators. (orig.)

CAS CERN Accelerator School superconductivity in particle accelerators

International Nuclear Information System (INIS)

Turner, S.

1989-01-01

One of the objectives of the CERN Accelerator School is to run courses on specialised topics in the particle accelerator field. The present volume contains the proceedings of one such course, this time organized in conjunction with the Deutsches Elektronen Synchrotron (DESY) on the subject of superconductivity in particle accelerators. This course reflects the very considerable progress made over the last few years in the use of the technology for the magnet and radio-frequency systems of many large and small accelerators already in use or nearing completion, while also taking account of the development work now going on for future machines. The lectures cover the theory of superconductivity, cryogenics and accelerator magnets and cavities, while the seminars include superfluidity, superconductors, special magnets and the prospects for high-temperature superconductors. (orig.)

CERN/KEK: Very high accelerating gradients

Energy Technology Data Exchange (ETDEWEB)

Anon.

1993-01-15

Full text: A world-wide effort is under way to develop linear electron-positron colliders so that physics experiments can be extended into a range of energies where circular machines (necessarily much larger than CERN's 27-kilometre LEP machine) would be crippled by synchrotron radiation. CERN is studying the feasibility of building a 2 TeV machine called CLIC powered not by individual klystrons, but by a high intensity electron 'drive' linac running parallel to the main linac (November 1990, page 7). This drive linac will itself be powered by similar superconducting cavities to those developed for LEP. A high gradient is an obvious design aim for any future high energy linear collider because it makes it shorter and therefore cheaper - the design figure for the CLIC machine is 80 MV/m. The CLIC study group has taken a significant step forward in demonstrating the technical feasibility of their machine by achieving peak and average accelerating gradients of 137 MV/m and 84 MV/m respectively in a short section of accelerating structure during high gradient tests at the Japanese KEK Laboratory last year. This result obtained within the framework of a CERN/KEK collaboration on linear colliders was obtained using a 20-cell accelerating section built at CERN using state-of the- art technology which served both as a model for CLIC studies as well as a prototype for the Japanese Linear Collider studies. The operating frequency of the model accelerating section is 2.6 times lower than the CLIC frequency but was chosen because a high power r.f. source and pulse compression scheme has been developed for this frequency at KEK. Testing CLIC models at 11.4 GHz is however more stringent than at 30 GHz because the chance of electrical breakdown increases as the frequency is lowered. This recent result clearly demonstrates that a gradient of 80 MV/m is feasible.

CERN/KEK: Very high accelerating gradients

International Nuclear Information System (INIS)

Anon.

1993-01-01

Full text: A world-wide effort is under way to develop linear electron-positron colliders so that physics experiments can be extended into a range of energies where circular machines (necessarily much larger than CERN's 27-kilometre LEP machine) would be crippled by synchrotron radiation. CERN is studying the feasibility of building a 2 TeV machine called CLIC powered not by individual klystrons, but by a high intensity electron 'drive' linac running parallel to the main linac (November 1990, page 7). This drive linac will itself be powered by similar superconducting cavities to those developed for LEP. A high gradient is an obvious design aim for any future high energy linear collider because it makes it shorter and therefore cheaper - the design figure for the CLIC machine is 80 MV/m. The CLIC study group has taken a significant step forward in demonstrating the technical feasibility of their machine by achieving peak and average accelerating gradients of 137 MV/m and 84 MV/m respectively in a short section of accelerating structure during high gradient tests at the Japanese KEK Laboratory last year. This result obtained within the framework of a CERN/KEK collaboration on linear colliders was obtained using a 20-cell accelerating section built at CERN using state-of the- art technology which served both as a model for CLIC studies as well as a prototype for the Japanese Linear Collider studies. The operating frequency of the model accelerating section is 2.6 times lower than the CLIC frequency but was chosen because a high power r.f. source and pulse compression scheme has been developed for this frequency at KEK. Testing CLIC models at 11.4 GHz is however more stringent than at 30 GHz because the chance of electrical breakdown increases as the frequency is lowered. This recent result clearly demonstrates that a gradient of 80 MV/m is feasible

Computer control applied to accelerators

CERN Document Server

Crowley-Milling, Michael C

1974-01-01

The differences that exist between control systems for accelerators and other types of control systems are outlined. It is further indicated that earlier accelerators had manual control systems to which computers were added, but that it is essential for the new, large accelerators to include computers in the control systems right from the beginning. Details of the computer control designed for the Super Proton Synchrotron are presented. The method of choosing the computers is described, as well as the reasons for CERN having to design the message transfer system. The items discussed include: CAMAC interface systems, a new multiplex system, operator-to-computer interaction (such as touch screen, computer-controlled knob, and non- linear track-ball), and high-level control languages. Brief mention is made of the contributions of other high-energy research laboratories as well as of some other computer control applications at CERN. (0 refs).

Lauch of CERN particle accelerator delayed

CERN Multimedia

2007-01-01

"Scientists seeking to uncover the secrets of the universe will have to wait a little longer after the CERN laboratory inSwitzerland yesterday confirmed a delay in tests of its massive new particle accelerator." (1 page)

Simon van der Meer and his legacy to CERN and particle accelerators

International Nuclear Information System (INIS)

Chohan, Vinod

2012-01-01

Simon van der Meer was a brilliant scientist and a true giant in the field of accelerators. His seminal contributions to accelerator science are essential to this day in our quest to satisfy the demands of modern particle physics. Whether we are talking of long-baseline neutrino physics or antiproton-proton physics at CERN and Fermilab, or proton-proton physics at the LHC, his techniques and inventions have been a vital and necessary part of modern-day successes. Simon van der Meer and Carlo Rubbia were the first CERN scientists to become Nobel laureates in Physics in 1984. His less well-known contributions spanned a whole range of subjects in accelerator science from magnet design to power supply design, beam measurements, slow beam extraction, sophisticated programs, and controls. (author)

CERN accelerator school: Antiprotons for colliding beam facilities

International Nuclear Information System (INIS)

Bryant, P.; Newman, S.

1984-01-01

This is a specialized course which addresses a wide spectrum of theoretical and technological problems confronting the designer of an antiproton facility for high-energy-physics research. A broad and profound basis is provided by the lecturers' substantial experience gained over many years with CERN's unique equipment. Topics include beam optics, special lattices for antiproton accumulation and storage rings, antiproton production, stochastic cooling, acceleration and storage, r.f. noise, r.f. beam manipulations, beam-beam interaction, beam stability due to ion accumulation, and diagnostics. The SPS (Super Proton Synchrotron) panti p collider, LEAR (the Low Energy Antiproton Ring at CERN), antiprotons in the ISR (Intersecting Storage Rings), the new antiproton collector (ACOL) and gas jet targets are also discussed. A table is included listing the parameters of all CERN's accelerators and storage rings. See hints under the relevant topics. (orig./HSI)

Monitoring Control Applications at CERN

CERN Document Server

Bernard, F; Milcent, H; Petrova, L B; Varela, F

2011-01-01

The Industrial Controls and Engineering (EN-ICE) group [1] of the Engineering Department at CERN has produced, and is responsible for the operation of around 60 applications, which control critical processes in the domains of cryogenics, quench protection systems, power interlocks for the Large Hadron Collider and other subsystems of the accelerator complex. These applications require 24/7 operation and a quick reaction to problems. For this reason the EN-ICE group is presently developing the Monitoring Operation of cOntrols Networks (MOON) tool to detect, anticipate and inform of possible anomalies in the integrity of the applications. The tool builds on top of Simatic WinCC Open Architecture (WinCC OA) [2] SCADA and makes usage of the Joint COntrols Project (JCOP) [3] and the UNified INdustrial COntrol System (UNICOS) [4] Frameworks developed at CERN. The tool provides centralized monitoring and software management of the different elements integrating the control systems like Windows and L...

MONITORING CONTROL APPLICATIONS AT CERN

CERN Document Server

Bernard, F; Milcent, H; Petrova, L B; Varlea, F

2011-01-01

The Industrial Controls and Engineering (EN-ICE) group [1] of the Engineering Department at CERN has produced, and is responsible for the operation of around 60 applications, which control critical processes in the domains of cryogenics, quench protection systems, power interlocks for the Large Hadron Collider and other sub-systems of the accelerator complex. These applications require 24/7 operation and a quick reaction to problems. For this reason the EN-ICE group is presently developing the Monitoring Operation of cOntrols Networks (MOON) tool to detect, anticipate and inform of possible anomalies in the integrity of the applications. The tool builds on top of Simatic WinCC Open Architecture (WinCC OA) [2] SCADA and makes usage of the Joint COntrols Project (JCOP) [3] and the UNified INdustrial COntrol System (UNICOS) [4] Frameworks developed at CERN. The tool provides centralized monitoring and software management of the different elements integrating the control systems like Windows and Linux servers, PL...

CERN-LHC accelerator superconducting magnet. Development and international cooperation

International Nuclear Information System (INIS)

Yamamoto, Akira; Nakamoto, Tatsushi; Sasaki, Ken-ichi

2009-01-01

CERN-LHC accelerator superconducting magnets and a cooperative work for interaction region quadrupole magnets are introduced. The accelerator commissioning and the incident happened during the commissioning in 2008 is also briefly discussed. (author)

Two members of the CERN personnel receive the 2002 Accelerator Prize

CERN Multimedia

2002-01-01

Kurt H bner and Frank Zimmermann have been awarded the 2002 Accelerator Prize by the Interdivisional Group on Accelerators of the European Physical Society (EPS-IGA).   Kurt H bner Frank Zimmermann Kurt H bner is well known to CERN, as he was Director of Accelerators from 1994 to 2001, after having been PS Division Leader. A member of the CERN personnel since 1966, Kurt H bner, who is of Austrian nationality, has taken part in the design and operation of many accelerators including the PS, the ISR and LEP. He has received the award for his major contributions to accelerator physics and for his excellent leadership in this field. In its citation, the Prize Selection Committee stated that «he has provided guidance for generations of accelerator physicists and engineers, thereby contributing immensely to the prosperity of accelerators at CERN and many other laboratories around the world.» Frank Zimmermann has been awarded the prize for an individual in the early part of his or her career who has made a rece...

CAS CERN accelerator school: 5. general accelerator physics course. Vol. 2. Proceedings

International Nuclear Information System (INIS)

Turner, S.

1994-01-01

The fifth CERN Accelerator School (CAS) basic course on General Accelerator Physics was given at the University of Jyvaeskylae, Finland, from 7 to 18 September 1992. Its syllabus was based on the previous similar courses held at Gif-sur-Yvette in 1984, Aarhus 1986, Salamanca 1988 and Juelich 1990, and whose proceedings were published as CERN Reports 85-19, 87-10, 89-05 and 91-04, respectively. However, certain topics were treated in a different way, improved or extended, while new subjects were introduced. As far as the proceedings of this school are concerned the opportunity was taken not only to include the lectures presented but also to select and revise the most appropriate chapters from the previous similar schools. In this way the present volumes constitute a rather complete introduction to all aspects of the design and construction of particle accelerators, including optics, emittance, luminosity, longitudinal and transverse beam dynamics, insertions, chromaticity, transfer lines, resonances, accelerating structures, tune shifts, coasting beams, lifetime, synchrotron radiation, radiation damping, beam-beam effects, diagnostics, cooling, ion and positron sources, RF and vacuum systems, injection and extraction, conventional, permanent and superconducting magnets, cyclotrons, RF linear accelerators, microtrons, as well as applications of particle accelerators (including therapy) and the history of accelerators. See hints under the relevant topics. (orig.)

CAS CERN Accelerator School. 5. Advanced accelerator physics course. Proceedings. Vol. 2

International Nuclear Information System (INIS)

Turner, S.

1995-01-01

The fifth CERN Accelerator School (CAS) advanced course on Accelerator Physics was given at the Paradise Hotel, Rhodes, Greece from 20 September to 1 October 1993. Its syllabus was based on the previous similar courses held at Oxford 1985, Berlin 1987, Uppsala 1989 and Noordwijkerhout 1991, and whose proceedings were published as CERN Reports 97-03, 89-01, 90-04 and 92-01, respectively. The present volumes are intended to replace and to bring up to date all the material in earlier publications. They contain not only all the lectures given in the Rhodes course but a number of important contributions to previous courses which are thought to be essential for a complete understanding of all aspects of the design and construction of particle accelerators at an advanced level. They include sections on Hamiltonian equations and accelerator optics, chromaticity and dynamic beam aperture, particle tracking, the kinetic theory, longitudinal beam optics, coherent instabilities, beam-beam dynamics, intra-beam scattering, beam cooling, Schottky noise, beam radiation, neutralisation, beam polarisation, radio-frequency quadrupoles, as well as chapters on space charge, superconducting magnets, crystal bending, beam-beam measurement and accelerator medical applications. (orig.)

CAS CERN Accelerator School. 5. Advanced accelerator physics course. Proceedings. Vol. 1

Energy Technology Data Exchange (ETDEWEB)

Turner, S [ed.

1995-11-22

The fifth CERN Accelerator School (CAS) advanced course on Accelerator Physics was given at the Paradise Hotel, Rhodes, Greece from 20 September to 1 October 1993. Its syllabus was based on the previous similar courses held at Oxford 1985, Berlin 1987, Uppsala 1989 and Noordwijkerhout 1991, and whose proceedings were published as CERN Reports 87-03, 89-01, 90-04 and 92-01, respectively. The present volumes are intended to replace and to bring up to date all the material in earlier publications. They contain not only all the lectures given in the Rhodes course but a number of important contributions to previous courses which are thought to be essential for a complete understanding of all aspects of the design and construction of particle accelerators at an advanced level. They include sections on Hamiltonian equations and accelerator optics, chromaticity and dynamic beam aperture, particle tracking, the kinetic theory, longitudinal beam optics, coherent instabilities, beam-beam dynamics, intra-beam scattering, beam cooling, Schottky noise, beam radiation, neutralisation, beam polarisation, radio-frequency quadrupoles, as well as chapters on space charge, superconducting magnets, crystal bending, beam-beam measurement and accelerator medical applications. (orig.).

CAS CERN Accelerator School. 5. Advanced accelerator physics course. Proceedings. Vol. 1

International Nuclear Information System (INIS)

Turner, S.

1995-01-01

The fifth CERN Accelerator School (CAS) advanced course on Accelerator Physics was given at the Paradise Hotel, Rhodes, Greece from 20 September to 1 October 1993. Its syllabus was based on the previous similar courses held at Oxford 1985, Berlin 1987, Uppsala 1989 and Noordwijkerhout 1991, and whose proceedings were published as CERN Reports 87-03, 89-01, 90-04 and 92-01, respectively. The present volumes are intended to replace and to bring up to date all the material in earlier publications. They contain not only all the lectures given in the Rhodes course but a number of important contributions to previous courses which are thought to be essential for a complete understanding of all aspects of the design and construction of particle accelerators at an advanced level. They include sections on Hamiltonian equations and accelerator optics, chromaticity and dynamic beam aperture, particle tracking, the kinetic theory, longitudinal beam optics, coherent instabilities, beam-beam dynamics, intra-beam scattering, beam cooling, Schottky noise, beam radiation, neutralisation, beam polarisation, radio-frequency quadrupoles, as well as chapters on space charge, superconducting magnets, crystal bending, beam-beam measurement and accelerator medical applications. (orig.)

CAS CERN Accelerator School. 5. Advanced accelerator physics course. Proceedings. Vol. 2

Energy Technology Data Exchange (ETDEWEB)

Turner, S [ed.

1995-11-22

The fifth CERN Accelerator School (CAS) advanced course on Accelerator Physics was given at the Paradise Hotel, Rhodes, Greece from 20 September to 1 October 1993. Its syllabus was based on the previous similar courses held at Oxford 1985, Berlin 1987, Uppsala 1989 and Noordwijkerhout 1991, and whose proceedings were published as CERN Reports 97-03, 89-01, 90-04 and 92-01, respectively. The present volumes are intended to replace and to bring up to date all the material in earlier publications. They contain not only all the lectures given in the Rhodes course but a number of important contributions to previous courses which are thought to be essential for a complete understanding of all aspects of the design and construction of particle accelerators at an advanced level. They include sections on Hamiltonian equations and accelerator optics, chromaticity and dynamic beam aperture, particle tracking, the kinetic theory, longitudinal beam optics, coherent instabilities, beam-beam dynamics, intra-beam scattering, beam cooling, Schottky noise, beam radiation, neutralisation, beam polarisation, radio-frequency quadrupoles, as well as chapters on space charge, superconducting magnets, crystal bending, beam-beam measurement and accelerator medical applications. (orig.).

CERN Accelerator School: Intensity Limitations in Particle Beams | 2-11 November

CERN Multimedia

2015-01-01

Registration is now open for the CERN Accelerator School’s specialised course on Intensity Limitations in Particle Beams, to be held at CERN between 2 and 11 November 2015.   This course will mainly be of interest to staff in accelerator laboratories, university departments and companies manufacturing accelerator equipment. Many accelerators and storage rings, whether intended for particle physics experiments, synchrotron light sources or industrial applications, require beams of high brightness and the highest possible intensities. A good understanding of the possible limitations is required to achieve the desired performance. The programme for this course will cover the interaction of beams with their surroundings, with other beams and further collective effects. Lectures on the effects and possible mitigations will be complemented by tutorials. Further information can be found at: http://cas.web.cern.ch/cas/Intensity-Limitations-2015/IL-advert.html   http:/...

The CERN Control Centre is up and running!

CERN Multimedia

2006-01-01

The CERN Control Centre (CCC) that combines all the control rooms for the accelerators, the cryogenic system and the technical infrastructure came into operation on 1st February. This is not a mock-up but the real thing! The CERN Control Centre has been built and put into operation in only 15 months.On 1st February, at 2.00 p.m., Patrick Villeton Pachot started the first Technical Infrastructure shift at the brand new CERN Control Centre. From now on, when you dial 72201 to report a leak or an electrical fault, your call will ring out in the brand new CERN Control Centre. The much anticipated CCC came on line on 1st February, exactly as planned. The 2.00 p.m. shift by the operators of the former Technical Control Room (TCR), now renamed TI for Technical Infrastructure, marked the start of operations at the Centre. The PCR, MCR, TCR and QCR are no more, and all the individual control rooms have been merged into one. And what a control room it is! True to the streamlined image announced when the project was f...

CAS CERN Accelerator School vacuum technology. Proceedings

International Nuclear Information System (INIS)

Turner, S.

1999-01-01

These proceedings present the lectures given at the twelfth specialized course organized by the CERN Accelerator School (CAS), the topic this time being 'Vacuum Technology'. Despite the importance of vacuum technology in the design and operation of particle accelerators at CERN and at the many other accelerators already installed around the world, this was the first time that CAS has organized a course devoted entirely to this topic. Perhaps this reflects the facts that vacuum has become one of the more critical aspects of future accelerators, and that many of the pioneers in the accelerator field are being replaced by new, younger personnel. The lectures start with the basic concepts of the physics and technology of vacuum followed by detailed descriptions of the many different types of gas-pumping devices and methods to measure the pressures achieved. The outgassing characteristics of the different materials used in the construction of vacuum systems and the optimisation of cleaning methods to reduce this outgassing are then explained together with the effects of the residual gases on the particle beams. Then follow chapters on leak detection, materials and vacuum system engineering. Finally, seminars are presented on designing vacuum systems, the history of vacuum devices, the LHC (large hadron collider) vacuum system, vacuum systems for electron storage rings, and quality assurance for vacuum. (orig.)

JMS-based SOA monitors CERN particle accelerators

CERN Multimedia

Seeley, Rich

2007-01-01

"Service-oriented architecture (SOA) may not exactly be nuclear physics, but at the CERN (European Organization for Nuclear Research) physics laboratory on the border of France and Switzerland, an SOA system is watching over giant particle accelerators." (1,5 page)

CERN opens up its control rooms to youngsters

CERN Multimedia

CERN Bulletin

2011-01-01

CERN is inviting 13 to 18 year-olds to come and spend a couple of hours in the control rooms of the LHC and its experiments. Registration is now open.   Is your neighbour's kid eager to come and see what's going on in the CERN control rooms for himself? Is your niece from Germany fascinated by the famous accelerator near Geneva that she's heard about and asking to know more? Then Researchers Night is for them! From 6.00 p.m. on Friday 23 September until 1.00 a.m. the following morning, the LHC and its experiments will open their doors to 13 to 18 year-olds. They are invited to come and spend a couple of hours in the control rooms watching the physicists and taking part in various activities. ALICE, ATLAS, CMS, LHCb, TOTEM, and the CERN Control Centre (CCC) will all be welcoming visitors. For this second year of CERN's involvement in European Researchers Night, the CERN exhibitions will be open late and special activities will be organised in Microcosm....

CAS - CERN Accelerator School: Free Electron Lasers and Energy Recovery Linacs

CERN Document Server

2018-01-01

These proceedings collate lectures given at the course on Free Electron Lasers and Energy Recovery Linacs (FELsand ERLs), organised by the CERN Accelerator School (CAS). The course was held at the Hotel Scandic HamburgEmporio, Hamburg, Germany from 31 May to 10 June 2016, in collaboration with DESY. Following introductorylectures on radiation issues, the basic requirements on linear accelerators and ERLs are discussed. Undulators andthe process of seeding and lasing are then treated in some detail, followed by lectures on various beam dynamicsand controls issues.

A day in the CERN Control Centre

CERN Multimedia

Rosaria Marraffino

2015-01-01

The CERN Control Centre (CCC) is the nerve centre of the CERN beam systems. From this room, the experts prepare, monitor, adjust, and control the particle beams that circulate throughout the accelerator complex while ensuring that the services and the technical infrastructure work flawlessly. Buttons, screens, telephones, lights (but no sound): in the CCC, everything is ready to make it possible for the LHC to reach the unprecedented energies expected at Run 2.   Seen from above, the CERN Control Centre resembles the shape of a quadrupole magnet. The consoles are distributed in four circles, called “islands”, dedicated to the LHC, the SPS, the PS Complex and the Technical Infrastructure (TI) respectively. Spread between TI and LHC are the Cryogenics consoles. Being in the same room allows the 24h-manned islands to be constantly in touch with one another, thus ensuring the best performance of the machines. At the LHC island, operators are currently busy training the magnet...

Proceedings, CAS - CERN Accelerator School: RF for Accelerators, Ebeltoft, Denmark, 8 - 17 Jun 2010

CERN Document Server

Bailey, R

2012-01-01

These proceedings present the lectures given at the twenty-fourth specialized course organized by the CERN Accelerator School (CAS). The course was held in Ebeltoft, Denmark, from 8-17 June, 2010 in collaboration with Aarhus University, with the topic 'RF for Accelerators' While this topic has been covered by CAS previously, early in the 1990s and again in 2000, it was recognized that recent advances in the field warranted an updated course. Following introductory courses covering the background physics, the course attempted to cover all aspects of RF for accelerators; from RF power generation and transport, through cavity and coupler design, electronics and low level control, to beam diagnostics and RF gymnastics. The lectures were supplemented with several sessions of exercises, which were completed by discussion sessions on the solutions.

Hacking control systems, switching… accelerators off?

CERN Multimedia

Computer Security Team

2013-01-01

In response to our article in the last Bulletin, we received the following comment: “Wasn’t Stuxnet designed to stop the Iranian nuclear programme? Why then all this noise with regard to CERN accelerators? Don’t you realize that ‘computer security’ is not the raison d'être of CERN?”. Thank you for this golden opportunity to delve into this issue.   Given the sophistication of Stuxnet, it might have been hard to detect such a targeted attack against CERN, if at all. But this is not the point. There are much simpler risks for our accelerator complex and infrastructure. And, while “‘computer security’ is [indeed] not the raison d' être”, it is our collective responsibility to keep this risk at bay.   Examples? Just think of a simple computer virus infecting Windows-based control PCs connected to the accelerator network (the Technical Network, &ld...

CAS - CERN Accelerator School and ALBA Synchrotron Light Facility : Course on Vacuum in Accelerators

CERN Document Server

Vacuum in Accelerators

2007-01-01

These proceedings present the lectures given at the twentieth specialized course organized by the CERN Accelerator School (CAS), the topic being Vacuum in Accelerators. The course was held in Platja d’Aro, Spain, from 16 to 24 May 2006. A similar course took place in Snekersten, Denmark, in 1999, with proceedings published as CERN 99-05. After an interval of seven years, the aim of this course was to present a review of the actual state of the art and to highlight the latest developments in the field. The lectures start with a general overview of vacuum, accelerators and cryogenics followed by a more detailed review of the basic principles concerning thermal and non-thermal outgassing. More specialized lectures are then proposed on gas dynamics, on the interaction of energetic particles with matter, and on beam–gas collisions. The production and measurement of vacuum is addressed in subsequent lectures on pumps and vacuum gauges which present a detailed view of the materials currently used in accelerators...

The new generation of PowerPC VMEbus front end computers for the CERN SPS and LEP accelerators control system

CERN Document Server

Van den Eynden, M

1995-01-01

The CERN SPS and LEP PowerPC project is aimed at introducing a new generation of PowerPC VMEbus processor modules running the LynxOS real-time operating system. This new generation of front end computers using the state-of-the-art microprocessor technology will first replace the obsolete Xenix PC based systems (about 140 installations) successfully used since 1988 to control the LEP accelerator. The major issues addressed in the scope of this large scale project are the technical specification for the new PowerPC technology, the re-engineering aspects, the interfaces with other CERN wide projects, and the set up of a development environment. This project offers also support for other major SPS and LEP projects interested in the PowerPC microprocessor technology.

Radiations effects on polymeric materials used in CERN particles accelerators

International Nuclear Information System (INIS)

Tavlet, M.

1997-01-01

For fundamental research on the basis structure of matter, the European Organization for Nuclear Research (CERN) operates several high-energy particle accelerators around which materials and components are exposed to ionizing radiation. To ensure a safe and reliable operation, the radiation behaviour of most of the components is systematically tested prior to their selection. The long-term radiation-test programme allows to assess the component lifetime in the environment or our accelerators where the absorbed doses are continuously recorded. This article presents organic materials in use at CERN, and some recent results are given on their behaviour under irradiation. (authors)

Proceedings of CAS - CERN Accelerator School: Course on Superconductivity for Accelerators

Energy Technology Data Exchange (ETDEWEB)

Bailey, R [European Organization for Nuclear Research, Geneva (Switzerland)

2014-07-01

These proceedings collate lectures given at the twenty-seventh specialized course organised by the CERN Accelerator School (CAS). The course was held at the Ettore Majorana Foundation and Centre for Scientific Culture (EMFCSC) in Erice, Italy, from 24 April to 4 May 2013. Following recapitulation lectures on basic accelerator physics and superconductivity, the course covered topics related to the design, production and operation of superconducting RF systems and superconducting magnets for accelerators. The participants pursued one of six case studies in order to get ’hands-on’ experience of the issues connected with the design of superconducting systems. A series of topical seminars completed the programme.

Quality Management of CERN Vacuum Controls

CERN Document Server

Antoniotti, F; Fortescue-Beck, E; Gama, J; Gomes, P; Le Roux, P; Pereira, H; Pigny, G

2014-01-01

The vacuum controls Section (TE-VSC-ICM) is in charge of the monitoring, maintenance and consolidation of the control systems of all accelerators and detectors in CERN; this represents 6 000 instruments distributed along 128 km of vacuum chambers, often of heterogeneous architectures and of diverse technical generations. In order to improve the efficiency of the services provided by ICM, to vacuum experts and to accelerator operators, a Quality Management Plan is being put into place. The first step was the standardization of the naming convention across different accelerators. The traceability of problems, requests, repairs, and other actions, has also been put into place (VTL). This was combined with the effort to identify each individual device by a coded label, and register it in a central database (MTF). Occurring in parallel, was the gathering of old documents and the centralization of information concerning architectures, procedures, equipment and settings (EDMS). To describe the topology of control c...

Developments on the SCADA of CERN Accelerators Vacuum

CERN Document Server

Antoniotti, F; Boccioli, M; Gomes, P; Pereira, H; Kopylov, L; Mikheev, M; Merker, S

2014-01-01

During the first 3 years of LHC operation, the priority for the SCADA (Supervisory Control And Data Acquisition) of vacuum controls was to attend to user requests, and to improve its ergonomics and efficiency: access & presentation of information simplified and normalized; coherent functionalities & menus across all accelerators; automatic scripts instead of fastidious manual actions; enhanced tools for data analysis and for maintenance interventions. Several decades of cumulative developments, based on heterogeneous technologies and architectures, have been asking for a homogenization effort. The first LHC Long Shutdown (LS1) provides the opportunity to further standardize the vacuum controls systems [1], around Siemens-S7 PLCs (Programmable Logic Controllers) and PVSS SCADA. Meanwhile, exchanges with other Groups at CERN and outside Institutes have been promoted: to follow the global update policy for software libraries; to discuss philosophies and development details; and to accomplish common pro...

Control protocol: the proposed new CERN standard access procedure to accelerator equipment

International Nuclear Information System (INIS)

Baribaud, G.; Barnett, I.; Benincasa, G.

1992-01-01

Control protocol provides a normalized access procedure for equipment of the same kind from a control system. Modelisation and the subsequent identification of functionalities with their parameters, variables and attributes have now been carried out at CERN for representative families of devices. ISO specifications, such as the ASN.1 metalanguage for data structure representation and MMS definitions and services have, to some extent, been introduced in the design for generality and compatibility with external world. The final product of this design is totally independent of the control systems and permits object oriented implementations in any controls frame. The present paper describes the different phases of the project with a short overview of the various implementations under development at CERN. (author)

Arts@CERN | ACCELERATE Austria | 19 May | IdeaSquare

CERN Multimedia

2016-01-01

​Arts@CERN welcomes you to a talk by architects Sandra Manninger and Matias Del Campo, at IdeaSquare (Point 1) on May 19 at 6:00 p.m.   Sensible Bodies - architecture, data, and desire. Sandra and Matias are the winning architects for ACCELERATE Austria. Focusing on the notion of geometry, they are at CERN during the month of May, as artists in residence. Their research highlights how to go beyond beautiful data to discover something that could be defined voluptuous data. This coagulation of numbers, algorithms, procedures and programs uses the forces of thriving nature and, passing through the calculation of a multi-core processor, knits them with human desire. Read more. ACCELERATE Austria is supported by The Department of Arts of the Federal Chancellery of Austria. Thursday, May 19 at 6:00 p.m. at IdeaSquare.  See event on Indico. 

Beam Tests of a New Digital Beam Control System for the CERN LEIR Accelerator

CERN Document Server

Angoletta, Maria Elena; Blas, Alfred; De Long, Joseph; Findlay, Alan; Matuszkiewicz, Pawel; Pedersen, Flemming; Salom-Sarasqueta, Angela

2005-01-01

The Low Energy Ion Ring (LEIR) is a major component in the Large Hadron Collider ion injector chain. We have been developing an all-digital beam control and cavity servo system for the RF acceleration in LEIR. The system is housed by VME motherboards that may hold various daughter boards. Fast tasks are executed in Field Programmable Gate Arrays (FPGAs), slower tasks and communication with the software layer above are achieved in Digital Signal Processors (DSPs). We describe a simplified system prototype, which we tested with low intensity beams on the CERN PS Booster (PSB). The aim was to verify the combined DSP+FPGA architecture and the feedback loop dynamics. An additional goal was to deploy and validate novel software concepts, such as reference-functions and timings generation, and user-selectable digital data acquisition.

Commissioning results of CERN HIE-ISOLDE and INFN ALPI cryogenic control systems

Science.gov (United States)

Inglese, V.; Pezzetti, M.; Calore, A.; Modanese, P.; Pengo, R.

2017-02-01

The cryogenic systems of both accelerators, namely HIE ISOLDE (High Intensity and Energy Isotope Separator On Line DEvice) at CERN and ALPI (Acceleratore Lineare Per Ioni) at LNL, have been refurbished. HIE ISOLDE is a major upgrade of the existing ISOLDE facilities, which required the construction of a superconducting linear accelerator consisting of six cryomodules, each containing five superconductive RF cavities and superconducting solenoids. The ALPI linear accelerator, similar to HIE ISOLDE, is located at Legnaro National Laboratories (LNL) and became operational in the early 90’s. It is composed of 74 superconducting RF cavities, assembled inside 22 cryostats. The new control systems are equipped with PLC, developed on the CERN UNICOS framework, which include Schneider and Siemens PLCs and various fieldbuses (Profibus DP and PA, WorldFIP). The control systems were developed in synergy between CERN and LNL in order to build, effectively and with an optimized use of resources, control systems allowing to enhance ease of operation, maintainability, and long-term availability. This paper describes (i) the cryogenic systems, with special focus on the design of the control systems hardware and software, (ii) the strategy adopted in order to achieve a synergic approach, and (iii) the commissioning results after the cool-down to 4.5 K of the cryomodules.

Monitoring control applications at CERN

International Nuclear Information System (INIS)

Bernard, F.; Gonzalez, M.; Milcent, H.; Petrova, L.B.; Varela, F.

2012-01-01

The Industrial Controls and Engineering (EN-ICE) group of the Engineering Department at CERN has produced, and is responsible for the operation of around 60 applications, which control critical processes in the domains of cryogenics, quench protection systems, power interlocks for the Large Hadron Collider and other subsystems of the accelerator complex. These applications require 24/7 operation and a quick reaction to problems. For this reason the EN-ICE group is presently developing the Monitoring Operation of controls Networks (MOON) tool to detect, anticipate and inform of possible anomalies in the integrity of the applications. The tool builds on top of Simatic WinCC Open Architecture (WinCC OA) SCADA and makes usage of the Joint Controls Project (JCOP) and the Unified Industrial Control System (UNICOS) Frameworks developed at CERN. The tool provides centralized monitoring and software management of the different elements integrating the control systems like Windows and Linux servers, PLCs, applications, etc. Although the primary aim of the monitoring tool is to assist the members of the EN-ICE Standby Service, the tool may offer different levels of detail, which also enables experts to diagnose and troubleshoot problems. In this paper, the scope, functionality and architecture of the tool are presented and some initial results on its performance are summarized. (authors)

Scientists confirm delay in testing new CERN particle accelerator

CERN Multimedia

2007-01-01

"Scientists seeking to uncover the secrets of the universe will have to wait a little longer after the CERN laboratory inswitzerland on Monday confirmed a delay in tests of a massive new particle accelerator." (1 page)

The new generation of PowerPC VMEbus front end computers for the CERN SPS and LEP accelerators control system

OpenAIRE

Van den Eynden, M

1995-01-01

The CERN SPS and LEP PowerPC project is aimed at introducing a new generation of PowerPC VMEbus processor modules running the LynxOS real-time operating system. This new generation of front end computers using the state-of-the-art microprocessor technology will first replace the obsolete Xenix PC based systems (about 140 installations) successfully used since 1988 to control the LEP accelerator. The major issues addressed in the scope of this large scale project are the technical specificatio...

CERN Proton Synchrotron Complex High-Level Controls Renovation

CERN Document Server

Deghaye, S; Garcia Quintas, D; Gourber-Pace, M; Kruk, G; Kulikova, O; Lezhebokov, V; Pasinelli, S; Peryt, M; Roderick, C; Roux, E; Sobczak, M; Steerenberg, R; Wozniak, J; Zaharieva, Z

2009-01-01

After a detailed study of the Proton Synchrotron (PS) complex requirements by experts of CERN controls & operation groups, a proposal to develop a new system, called Injector Controls Architecture (InCA), was presented to and accepted by the management late 2007. Aiming at the homogenisation of the control systems across CERN accelerators, InCA is based on components developed for the Large Hadron Collider (LHC) but also new components required to fulfil operation needs. In 2008, the project was in its elaboration phase and we successfully validated its architecture and critical use-cases during several machine development sessions. After description of the architecture put in place and the components used, this paper describes the planning approach taken combining iterative development phases with deployment in operation for validation sessions.

Greece welcomes CERN Accelerator School

CERN Multimedia

CAS School

2011-01-01

The CERN Accelerator School (CAS) and the University of the Aegean jointly organised a course on intermediate-level Accelerator Physics in Chios, Greece, from 19 to 30 September, 2011.   CAS Students pose for a group photo in Chios, Greece. This course followed the established format of the intermediate school, with lectures in the mornings and specialised courses in the afternoons. The latter provided “hands-on” education and experience in three topics: “RF Measurement Techniques”, “Beam Instrumentation and Diagnostics” and “Optics Design and Correction”.  Participants selected one of the three courses and followed the chosen topic throughout the school. Guided studies and tutorials on core subjects, seminars and a poster session completed the programme. An excursion included a visit to the Nea Moni monastery, a guided tour of two medieval villages, Pyrgi and Mesta, and finished with a typical Greek me...

Software factory techniques applied to process control at CERN

OpenAIRE

Dutour, Mathias D

2007-01-01

The CERN Large Hadron Collider (LHC) requires constant monitoring and control of quantities of parameters to guarantee operational conditions. For this purpose, a methodology called UNICOS (UNIfied Industrial COntrols Systems) has been implemented to standardize the design of process control applications. To further accelerate the development of these applications, we migrated our existing UNICOS tooling suite toward a software factory in charge of assembling project, domain and technical inf...

Concept for a lead-ion accelerating facility at CERN

International Nuclear Information System (INIS)

Billinge, R.; Boltezar, E.; Boussard, D.; Brouzet, E.; Cappi, R.; Raad, B. de; Doble, N.; Grafstroem, P.; Haseroth, H.; Hill, C.E.; Kissler, K.H.; Knott, J.; Linnecar, T.; Nitsch, F.; Poncet, A.; Raich, U.; Rasmussen, N.; Schoenauer, H.; Sherwood, T.R.; Siegel, N.; Tallgren, U.; Tetu, P.; Warner, D.; Weiss, M.

1990-01-01

After the successful acceleration of deuterons, alpha particles and in more recent years of oxygen and sulphur ions, interest arose for even heavier particles. This paper describes the problems associated with heavy ions. A proposal is made for a scenario which allows the CERN accelerators to cope with ions heavier than sulphur, e.g. lead. Discussed are the different options for the injector and the necessary upgrading for the circular machines. (orig.)

Plans for the Future of Proton Accelerators at CERN

CERN Document Server

Garoby, R; High Intensity Frontier Workshop (HIF04)

2005-01-01

The Large Hadron Collider, presently in construction at CERN, will be filled through a set of high performance proton accelerators providing the high brightness beam needed to reach the foreseen luminosity. Although this difficult project has top priority and uses most of the CERN resources, it is nevertheless time investigating improvements of the proton accelerator complex for physical cases beyond the LHC expectations. The needs of multiple physics communities have to be taken into account, as well as the necessity of consolidating the installations while keeping high reliability. This paper starts from the analysis and proposals made by the “High Intensity Proton” (HIP) working group [1, 2] to improve the performances of the PS and the SPS complex and better match the users requests in a staged scenario at short and medium term, and complement it, addressing the main possibilities beyond that horizon.

The CERN PS/SL Controls Java Application Programming Interface

International Nuclear Information System (INIS)

I. Deloose; J. Cuperus; P. Charrue; F. DiMaio; K. Kostro; M. Vanden Eynden; W. Watson

1999-01-01

The PS/SL Convergence Project was launched in March 1998. Its objective is to deliver a common control as infrastructure for the CERN accelerators by year 2001. In the framework of this convergence activity, a project was launched to develop a Java Application Programming Interface (API) between programs written in the Java language and the PS and SL accelerator equipment. This Java API was specified and developed in collaboration with TJNAF. It is based on the Java CDEV [1] package that has been extended in order to end up with a CERN/TJNAF common product. It implements a detailed model composed of devices organized in named classes that provide a property-based interface. It supports data subscription and introspection facilities. The device model is presented and the capabilities of the API are described with syntax examples. The software architecture is also described

CERN Open Days 2013, Point 6: Accelerator Systems

CERN Multimedia

CERN Photolab

2013-01-01

Stand description: Each beam of protons that races around the Large Hadron Collider can contain as much energy as a French TGV train travelling at 150 km/hour.  When it's time to shut the machine down, the Beam Dump System ensures that this energy is safely dissipated. In the tunnel at Point 6 you will be able to see the devices which form part of this system, as well as the blue LHC dipole magnets curving away into the distance. On surface no restricted access  On the surface, you can explore a fascinating exhibition of equipment used in CERN's accelerators, with CERN engineers and physicists on hand all day to answer your questions. You will also see one of the cryogenics installations which keep the LHC at just few degrees above absolute zero and you can find out about the measures CERN has put in place to ensure safety and protect the environment.

CAS - CERN Accelerator School: Course on Digital Signal Processing

CERN Document Server

Digital Signal Processing; CAS 2007

2008-01-01

These proceedings present the lectures given at the twenty-first specialized course organized by the CERN Accelerator School (CAS), the topic being Digital Signal Processing. The course was held in Sigtuna, Sweden, from 31 May–9 June 2007. This is the first time this topic has been selected for a specialized course. Taking into account the number of related applications currently in use in accelerators around the world, it was recognized that such a topic should definitively be incorporated into the CAS series of specialized courses. The specific aim of the course was to introduce the participants to the use and programming of Digital Signal Processors (DSPs) and Field Programmable Gate Arrays (FPGAs) evaluation boards. The course consisted of lectures in the mornings covering fundamental background knowledge in mathematics, controls theory, design tools, programming hardware platforms, and implementation details. In the afternoons the students split into two groups with people working in pairs. One group w...

Tuning of Clic accelerating structure prototypes at CERN

CERN Document Server

Shi, J; Olyunin, A; Wuensch, W

2010-01-01

An RF measurement system has been set up at CERN for use in the X-band accelerating structure development program of the CLIC study. Using the system, S-parameters are measured and the field distribution is obtained automatically using a bead-pull technique. The corrections for tuning the structure are calculated from an initial measurement and cell-by-cell tuning is applied to obtain the correct phase advance and minimum reflection at the operation frequency. The detailed tuning procedure is presented and explained along with an example of measurement and tuning of CLIC accelerating structure prototypes.

Evolution of control systems for accelerators

International Nuclear Information System (INIS)

Crowley-Milling, M.C.

1983-01-01

The author reviews the development of control systems for accelerators. After an historical survey and a general introduction the hardware and software of such systems is described. As example the control system of the CERN SP5 is considered. Finally an outlook is given to future developments with special regards to the LEP storage ring. (HSI)

A portable accelerator control toolkit

Energy Technology Data Exchange (ETDEWEB)

Watson, W.A. III

1997-06-01

In recent years, the expense of creating good control software has led to a number of collaborative efforts among laboratories to share this cost. The EPICS collaboration is a particularly successful example of this trend. More recently another collaborative effort has addressed the need for sophisticated high level software, including model driven accelerator controls. This work builds upon the CDEV (Common DEVice) software framework, which provides a generic abstraction of a control system, and maps that abstraction onto a number of site-specific control systems including EPICS, the SLAC control system, CERN/PS and others. In principle, it is now possible to create portable accelerator control applications which have no knowledge of the underlying and site-specific control system. Applications based on CDEV now provide a growing suite of tools for accelerator operations, including general purpose displays, an on-line accelerator model, beamline steering, machine status displays incorporating both hardware and model information (such as beam positions overlaid with beta functions) and more. A survey of CDEV compatible portable applications will be presented, as well as plans for future development.

A portable accelerator control toolkit

International Nuclear Information System (INIS)

Watson, W.A. III.

1997-01-01

In recent years, the expense of creating good control software has led to a number of collaborative efforts among laboratories to share this cost. The EPICS collaboration is a particularly successful example of this trend. More recently another collaborative effort has addressed the need for sophisticated high level software, including model driven accelerator controls. This work builds upon the CDEV (Common DEVice) software framework, which provides a generic abstraction of a control system, and maps that abstraction onto a number of site-specific control systems including EPICS, the SLAC control system, CERN/PS and others. In principle, it is now possible to create portable accelerator control applications which have no knowledge of the underlying and site-specific control system. Applications based on CDEV now provide a growing suite of tools for accelerator operations, including general purpose displays, an on-line accelerator model, beamline steering, machine status displays incorporating both hardware and model information (such as beam positions overlaid with beta functions) and more. A survey of CDEV compatible portable applications will be presented, as well as plans for future development

For information - Université de Genève : Accelerator Physics Challenges for the Large Hadron Collider at CERN

CERN Multimedia

Université de Genève

2005-01-01

UNIVERSITE DE GENEVE Faculte des sciences Section de physique - Département de physique nucléaire et corspusculaire 24, Quai Ernest-Ansermet - 1211 GENEVE 4 Tél : (022) 379 62 73 Fax: (022) 379 69 92 Mercredi 16 March SEMINAIRE DE PHYSIQUE CORPUSCULAIRE à 17h00 - Auditoire Stückelberg Accelerator Physics Challenges for the Large Hadron Collider at CERN Prof. Olivier Bruning / CERN The Large Hadron Collider project at CERN will bring the energy frontier of high energy particle physics back to Europe and with it push the accelerator technology into uncharted teritory. The talk presents the LHC project in the context of the past CERN accelerator developments and addresses the main challenges in terms of technology and accelerator physics. Information: http://dpnc.unige.ch/seminaire/annonce.html Organizer: A. Cervera Villanueva

The transmission of accelerator timing information around CERN

International Nuclear Information System (INIS)

Beetham, C.G.; Kohler, K.; Parker, C.R.C.B.; Ribes, J.B.

1992-01-01

Prior to the construction of the Large Electron Positron (LEP) collider, machine timing information was transmitted around CERN's accelerators using a labyrinth of dedicated copper wires. However, at an early stage in the design of the LEP control system, it was decided to use an integrated communication system based on Time Division Multiplex (TDM) techniques. Therefore it was considered appropriate to use this facility to transmit timing information over long distances. This note describes the overall system, with emphasis placed on the connectivity requirements for the CCITT G.703 series of recommendations. In addition the methods used for error detection and correction, and also for redundancy, are described. The cost implications of using such a TDM based system are also analyzed. Finally the performance and reliability obtained by using this approach are discussed. (author)

Overview of CERN Technology Transfer Strategy and Accelerator-Related Activities

CERN Document Server

Chesta, E; Wuensch, W; Sgobba, S; Stora, T; Chiggiato, P; Taborelli, M

2013-01-01

CERN, the European Organization for Nuclear Research, is actively engaged in identifying technologies developed for its accelerator complex that could be profitably used by partner research organizations or commercial companies in applications with potentially high socio-economic impact beyond pure fundamental physics research. \

The electron accelerator for the AWAKE experiment at CERN

Energy Technology Data Exchange (ETDEWEB)

Pepitone, K., E-mail: kevin.pepitone@cern.ch [CERN, Geneva (Switzerland); Doebert, S., E-mail: steffen.doebert@cern.ch [CERN, Geneva (Switzerland); Burt, G. [The University of Lancaster, Lancaster (United Kingdom); Chevallay, E.; Chritin, N.; Delory, C.; Fedosseev, V.; Hessler, Ch.; McMonagle, G. [CERN, Geneva (Switzerland); Mete, O. [The University of Manchester, Manchester (United Kingdom); Verzilov, V. [Triumf, Vancouver (Canada); Apsimon, R. [The University of Lancaster, Lancaster (United Kingdom)

2016-09-01

The AWAKE collaboration prepares a proton driven plasma wakefield acceleration experiment using the SPS beam at CERN. A long proton bunch extracted from the SPS interacts with a high power laser and a 10 m long rubidium vapour plasma cell to create strong wakefields allowing sustained electron acceleration. The electron bunch to probe these wakefields is supplied by a 20 MeV electron accelerator. The electron accelerator consists of an RF-gun and a short booster structure. This electron source should provide beams with intensities between 0.1 and 1 nC, bunch lengths between 0.3 and 3 ps and an emittance of the order of 2 mm mrad. The wide range of parameters should cope with the uncertainties and future prospects of the planned experiments. The layout of the electron accelerator, its instrumentation and beam dynamics simulations are presented.

CERN accelerator school: an introductory course in Poland

CERN Multimedia

2006-01-01

For the first time since the CERN Accelerator School (CAS) was set up, the â€ﾜIntroduction to Accelerator Physics” course was held in Zakopane, Poland.  This course was organised together with the National Atomic Energy Agency, Warsaw and the AGH University of Science and Technology, Cracow and was held from 1-13 October 2006 at the foot of the Tatra Mountains. The course was very well attended with 113 participants representing 26 different nationalities. Although most of the participants originated from Europe, some students came from countries as far away as Canada, China, India and North America.

Personal computers in accelerator control

International Nuclear Information System (INIS)

Anderssen, P.S.

1988-01-01

The advent of the personal computer has created a popular movement which has also made a strong impact on science and engineering. Flexible software environments combined with good computational performance and large storage capacities are becoming available at steadily decreasing costs. Of equal importance, however, is the quality of the user interface offered on many of these products. Graphics and screen interaction is available in ways that were only possible on specialized systems before. Accelerator engineers were quick to pick up the new technology. The first applications were probably for controllers and data gatherers for beam measurement equipment. Others followed, and today it is conceivable to make personal computer a standard component of an accelerator control system. This paper reviews the experience gained at CERN so far and describes the approach taken in the design of the common control center for the SPS and the future LEP accelerators. The design goal has been to be able to integrate personal computers into the accelerator control system and to build the operator's workplace around it. (orig.)

The New Modular Control System for Power Converters at CERN

CERN Document Server

Di Cosmo, Matteo

2015-01-01

The CERN accelerator complex consists of several generations of particle accelerators, with around 5000 power converters supplying regulated current and voltage to normal and superconducting magnet circuits. Today around 12 generations of converter control platforms can be found in the accelerator complex, ranging in age and technology. The diversity of these platforms has a significant impact on operability, maintenance and support of power converters. Over the past few years a new generation of modular controls called RegFGC3 has been developed by CERN’s power conversion group, with a goal to provide a standardised control platform, supporting a wide variety of converter topologies. The aim of this project is to reduce maintenance costs by decreasing the variety and diversity of control systems whilst simultaneously improving the operability and reliability of power converters and their controls. This paper describes the state of the on-going design and realization of the RegFGC3 platform, focusing on fun...

An Industrial Control System for the Supervision of the CERN Electrical Distribution Network

CERN Document Server

Poulsen, S

1999-01-01

CERN operates a large distribution network for the supply of electricity to the particle accelerators, experiments and the associated infrastructure. The distribution network operates on voltage levels from 400 V to 400 kV with a total yearly consumption of near to 1000 GWh. In the past, the laboratory has developed an in-house control system for this network, using the technologies applied to the accelerator control system. However, CERN is now working on a project to purchase, configure and install an industrial Electrical Network Supervisor (ENS). This is a state-of-the-art industrial control system completely developed and supported by an external contractor. The system - based on a scalable and distributed architecture - will allow the installation to be performed gradually, and will be tested while the existing system is fully operational. Ultimately, the complete electrical distribution network will be supervised with this new system, the maintenance and further development of which will be the complet...

CERN, Accelerating Science

CERN Multimedia

AUTHOR|(CDS)2086185

2015-01-01

What is the Universe made of? Where did it come from, where is it going and why does it behave the way it does? These are some of the questions that CERN set out to address when a small number of pioneering scientists created Europe’s first scientific international organization. Founded in 1954, in the aftermath of the Second World War, CERN is not only a first-class centre for fundamental research but also a pioneering adventure in international collaboration.

CAS CERN Accelerator School: Applied geodesy for particle accelerators

International Nuclear Information System (INIS)

Turner, S.

1987-01-01

This specialized course addresses the many topics involved in the application of geodesy to large particle accelerators, though many of the techniques described are equally applicable to large construction projects and surveillance systems where the highest possible surveying accuracies are required. The course reflects the considerable experience gained over many years, not only at CERN but in projects all over the world. The methods described range from the latest approach using satellites to recent developments in conventional techniques. They include the global positioning system (GPS), its development, deployment and precision, the use of the Terrameter and the combination or comparison of its results with those of the GPS, the automation of instruments, the management of measurements and data, and the highly evolved treatment of the observations. (orig.)

Development of an In-Situ Radiological Classification Technique for Material from CERN's Accelerator Facilities

CERN Document Server

AUTHOR|(CDS)2081300; Froeschl, Robert; Forkel-Wirth, Doris

CERN, the European Organization for Nuclear Research, operates high energy accelerators for particle physics research. Because of beam losses and subsequent particle interactions, radioactivity can be induced in certain accelerator components. Material and waste taken out of the accelerators facilities as a result of maintenance repair and upgrade actions as well as in case of decommissioning needs to be radiologically classied for future handling. Depending on the level of residual activity, some of these components are candidates for clearance from regulatory control in Switzerland. The Swiss radiation protection ordinance sets as criteria for clearance of material and waste from regulatory control the compliance with radionuclide specic limits for surface contamination and for specic activity as well as an ambient dose equivalent rate criterion. For objects with a mass below 1 kg a radionuclide specic clearance limit for total activity has to be respected. This work is focused on the specic activity criter...

The CERN Antiproton Collider Programme Accelerators and Accumulation Rings

CERN Document Server

Koziol, Heribert

2004-01-01

One of CERN's most daring and successful undertakings was the quest for the intermediate bosons, W and Z. In this paper, we describe the accelerator part of the venture which relied on a number of innovations: an extension of the budding method of stochastic cooling by many orders of magnitude; the construction of the Antiproton Accumulator, depending on several novel accelerator methods and technologies; major modifications to the 26 GeV PS Complex; and the radical conversion of the 300 GeV SPS, which just had started up as an accelerator, to a protonâ€"antiproton collider. The SPS Collider had to master the beamâ€"beam effect far beyond limits reached ever before and had to function in a tight symbiosis with the huge detectors UA1 and UA2.

Overview of different control strategies for a typical cryogenic warm compressor station at CERN

Science.gov (United States)

Pezzetti, M.; Garcia, C. V. M.; Bradu, B.; Rogez, E.

2017-12-01

Helium cryogenic systems are extensively used at CERN under several configurations for accelerators and detectors. The Warm Compressor Station (WCS) is the primary component of the helium cryogenic systems. The basic controls structure mainly depends on the bypass, charge and discharge valves configuration ensuring the nominal flow and compression ratio. This paper presents three studied methods for the WCS process control systems covering all transient and operational requirements: the proportional-integral-derivative (PID) control approach, the Fuzzy Logic Control approach (FLC) and the Internal Model Control approach (IMC). The paper emphasizes on simulation results of the different control strategies using Ecosimpro software associated to the CERN CryoLib library. Advantages and limitations of each method are presented.

Forum | Accelerating respect @ CERN | 5 May | Council Chamber

CERN Multimedia

2015-01-01

Forum for discussion: Accelerating respect @ CERN - What does this mean in our daily working lives?   Tuesday, 5 May at 2 p.m. Council Chamber Join our forum for discussion on the topic of “Respect in the workplace” where Alan Richter will be leading a discussion on the relationship between respect and trust, including some recent research on trust, and exploring the role of unconscious bias, how respect is differently interpreted across cultures, and the connection between respect, listening, and the appreciative inquiry process. Alan Richter is the president of QED Consulting, a 26-year-old company based in New York. He has consulted to organisations in the areas of leadership, values, culture and change and is a recognised pioneer in global diversity and international ethics. He has worked with CERN, NASA, the UN and many global companies and leading universities around the world. He has a Ph.D. in Philosophy from London University, and a Master’s degree fro...

General man-machine interface used in accelerators controls

International Nuclear Information System (INIS)

Boutheon, M.; Di Maio, F.; Pace, A.

1992-01-01

A large community is now using Workstations as Accelerators Computer Controls Interface, through the concepts of windows - menus - synoptics - icons. Some standards were established for the CERN-PS control systems rejuvenation. The Booster-to-PS transfer and injection process is now entirely operated with these tools. This application constitutes a global environment providing the users with the controls, analysis, visualization of a part of an accelerator. Individual commands, measurements, and specialized programs including complex treatments are available in a homogeneous frame. Some months of experience in current operation have shown that this model can be extended to the whole project. (author)

Progress in the fabrication of the RFQ accelerator for the CERN Linac4

CERN Document Server

Rossi, C; Lallement, J B; Lombardi, A M; Mathot, S; Pugnat, D; Timmins, M; Vandoni, G; Vretenar, M; Desmons, M; France, A; Le Noa, Y; Novo, G; Piquet, O

2010-01-01

The construction of Linac4, the new 160 MeV CERN H- injector, has started with the goal of improving the LHC injection chain from 2015 with a new higher energy linac. The low energy front end of Linac4 is based on a 352 MHz, 3-m long Radiofrequency Quadrupole (RFQ) accelerator [1]. The RFQ accelerates the 70 mA, 45 keV H- beam from the RF source to the energy of 3 MeV. The fabrication of the RFQ has started at CERN in 2009 and is presently in progress, aiming at the completion of the full structure by early 2011. The RFQ consists of three modules, one meter each; the fabrication alternates machining phases and stress relief cycles, for copper stabilization. Two brazing steps are required: one to assemble the four parts composing a module, and a second one to install the stainless steel flanges. In order to monitor that the tight mechanical and alignment budget is not exceeded, metrology measurements at the CERN workshop and RF bead-pull measurements are performed during the fabrication process. In this paper ...

CERN accelerator school: Introductory course in Poland

CERN Document Server

2006-01-01

For the first time since the CERN Accelerator School (CAS) was set up, the 'Introduction to Accelerator Physics' course was held in Zakopane, Poland. This course was organised together with the National Atomic Energy Agency, Warsaw, and the AGH University of Science and Technology, Cracow, and was held from 1-13 October 2006 at the foot of the Tatra Mountains. The course was very well attended with 113 participants representing 26 different nationalities. Although most of the participants originated from Europe, some students came from countries as far away as Canada, China, India and North America. The intensive programme comprised 35 lectures, 3 seminars given by local Polish lecturers, 5 tutorials where the students were split into four groups, a poster session where students could present their own work and 7 hours of guided and private study. The participants appreciated these study periods, which encouraged collaboration and knowledge-sharing in solving problems and gave them the opportunity to get t...

Monte Carlo simulations and benchmark studies at CERN's accelerator chain

CERN Document Server

AUTHOR|(CDS)2083190; Brugger, Markus

2016-01-01

Mixed particle and energy radiation fields present at the Large Hadron Collider (LHC) and its accelerator chain are responsible for failures on electronic devices located in the vicinity of the accelerator beam lines. These radiation effects on electronics and, more generally, the overall radiation damage issues have a direct impact on component and system lifetimes, as well as on maintenance requirements and radiation exposure to personnel who have to intervene and fix existing faults. The radiation environments and respective radiation damage issues along the CERN’s accelerator chain were studied in the framework of the CERN Radiation to Electronics (R2E) project and are hereby presented. The important interplay between Monte Carlo simulations and radiation monitoring is also highlighted.

Conference: ActiWiz – Optimizing material selection at CERN's accelerators from the radiological point of view

CERN Multimedia

2012-01-01

by Dr. Helmut Vincke (CERN), Chris Theis (CERN). Tuesday, October 30, 2012 from 15:00 to 16:30 at CERN ( 864-1-D02 - BE Auditorium Prévessin ) Description: The operation of a high-energy accelerator inevitably triggers the activation of equipment, which poses a safety hazard. Consequently access and handling constraints have to be imposed to ensure optimized working conditions. One of the key parameters determining the level of radioactivity is the material composition. Considering the radiological impact in addition to the engineering requirements during the selection of material clearly results in a safety benefit as well as a more efficient accelerator operation due to less stringent access and handling constraints. Another aspect is the minimization of future radioactive waste, which constitutes an important part of CERN’s commitment to limit its environmental impact by applying best practices. The ActiWiz software developed at CERN provides an easy to use method to optimize the m...

Supervision Software for the Integration of the Beam Interlock System with the CERN Accelerator Complex

CERN Document Server

Audrain, M; Dragu, M; Fuchsberger, K; Garnier, JC; Gorzawski, AA; Koza, M; Krol, K; Moscatelli, A; Puccio, B; Stamos, K; Zerlauth, M

2014-01-01

The Accelerator complex at the European Organisation for Nuclear Research (CERN) is composed of many systems which are required to function in a valid state to ensure safe beam operation. One key component of machine protection, the Beam Interlock System (BIS), was designed to interface critical systems around the accelerator chain, provide fast and reliable transmission of beam dump requests and trigger beam extraction in case of malfunctioning of equipment systems or beam losses. Numerous upgrades of accelerator and controls components during the Long Shutdown 1 (LS1) are followed by subsequent software updates that need to be thoroughly validated before the restart of beam operation in 2015. In parallel, the ongoing deployments of the BIS hardware in the PS booster (PSB) and the future LINAC4 give rise to new requirements for the related controls and monitoring software due to their fast cycle times. This paper describes the current status and ongoing work as well as the long-term vision for the integratio...

The CERN Control Centre Setting Standards for the 21st Century

CERN Document Server

Manglunki, Django

2008-01-01

In 2003, CERN decided to build a unified control centre to replace four of its control rooms: the â€ﾜMeyrin Control Room” which controlled the PS complex, the â€ﾜPrevessin Control Room” (PCR) which controlled the SPS and until 2000 LEP, the Technical Control Room (TCR), and the Cryogenics Control Room (QCR). After first contemplating a possible implementation next to the â€ﾜGlobe of Science and Innovation”, it was decided for budgetary reasons to build the new CERN Control Centre (CCC) on the same location as the PCR. This represented a 50% saving in construction costs as most of the technical infrastructure (computer network, water, electricity, ventilation) was already in place, but added stringent time constraints: civil engineering could not begin before the SPS shutdown in November 2004, yet the room had to be ready for the accelerator operations to resume in March 2006. Although this presented a strict construction schedule, it allowed the project to be completely driven by th...

Update on the CERN Computing and Network Infrastructure for Controls (CNIC)

CERN Multimedia

Lueders, S

2007-01-01

Over the last few years modern accelerator and experiment control systems have increasingly been based on commercial-off-the-shelf products (VME crates, PLCs, SCADA systems, etc.), on Windows or Linux PCs, and on communication infrastructures using Ethernet and TCP/IP. Despite the benefits coming with this (r)evolution, new vulnerabilities are inherited too: Worms and viruses spread within seconds via the Ethernet cable, and attackers are becoming interested in control systems. Unfortunately, control PCs cannot be patched as fast as office PCs. Even worse, vulnerability scans at CERN using standard IT tools have shown that commercial automation systems lack fundamental security precautions: Some systems crashed during the scan, others could easily be stopped or their process data be altered. During the two years following the presentation of the CNIC Security Policy at ICALEPCS2005, a "Defense-in-Depth" approach has been applied to protect CERN's control systems. This presentation will give a review of its th...

Experience with workstations for accelerator control at the CERN SPS

International Nuclear Information System (INIS)

Ogle, A.; Ulander, J.; Wilkie, I.

1990-01-01

The CERN super proton synchrotron (SPS) control system is currently undergoing a major long-term upgrade. This paper reviews progress on the high-level application software with particular reference to the operator interface. An important feature of the control-system upgrade is the move from consoles with a number of fixed screens and limited multitasking ability to workstations with the potential to display a large number of windows and perform a number of independent tasks simultaneously. This workstation environment thus permits the operator to run tasks in one machine for which he previously had to monopolize two or even three old consoles. However, the environment also allows the operator to cover the screen with a multitude of windows, leading to complete confusion. Initial requests to present some form of 'global status' of the console proved to be naive, and several iterations were necessary before the operators were satisfied. (orig.)

Council celebrates CERN Control Centre

CERN Multimedia

2006-01-01

With the unveiling of its new sign, the CERN Control Centre was officially inaugurated on Thursday 16 March. To celebrate its startup, CERN Council members visited the sleek centre, a futuristic-looking room filled with a multitude of monitoring screens.

Spaceflight participant visits CERN!

CERN Multimedia

Kathryn Coldham

2016-01-01

On 15 July, CERN welcomed spaceflight participant Anousheh Ansari.   Anousheh Ansari’s grin stretches from ear to ear, during an intriguing conversation with Nobel laureate Samuel C.C. Ting at AMS POCC. (Image: Maximilien Brice/CERN) Iranian-American Anousheh Ansari was the first-ever female spaceflight participant, spending eight days on the International Space Station (ISS) in 2006. She now has a new addition to her list of extraordinary sights ­– the home of the world’s largest particle accelerator: CERN.   On 15 July, Anousheh Ansari came to CERN and, unsurprisingly, visited the control room of the experiment attached to the ISS: the AMS. At the AMS Payload Operations Control Centre (AMS POCC) on CERN’s Prévessin site, she met the Nobel laureate Samuel Ting, spokesperson of the AMS experiment. Ansari and her accompanying guests were thrilled to expand their knowledge about CERN, its research and its...

AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN

CERN Document Server

Gschwendtner, E.; Amorim, L.; Apsimon, R.; Assmann, R.; Bachmann, A.M.; Batsch, F.; Bauche, J.; Berglyd Olsen, V.K.; Bernardini, M.; Bingham, R.; Biskup, B.; Bohl, T.; Bracco, C.; Burrows, P.N.; Burt, G.; Buttenschon, B.; Butterworth, A.; Caldwell, A.; Cascella, M.; Chevallay, E.; Cipiccia, S.; Damerau, H.; Deacon, L.; Dirksen, P.; Doebert, S.; Dorda, U.; Farmer, J.; Fedosseev, V.; Feldbaumer, E.; Fiorito, R.; Fonseca, R.; Friebel, F.; Gorn, A.A.; Grulke, O.; Hansen, J.; Hessler, C.; Hofle, W.; Holloway, J.; Huther, M.; Jaroszynski, D.; Jensen, L.; Jolly, S.; Joulaei, A.; Kasim, M.; Keeble, F.; Li, Y.; Liu, S.; Lopes, N.; Lotov, K.V.; Mandry, S.; Martorelli, R.; Martyanov, M.; Mazzoni, S.; Mete, O.; Minakov, V.A.; Mitchell, J.; Moody, J.; Muggli, P.; Najmudin, Z.; Norreys, P.; Oz, E.; Pardons, A.; Pepitone, K.; Petrenko, A.; Plyushchev, G.; Pukhov, A.; Rieger, K.; Ruhl, H.; Salveter, F.; Savard, N.; Schmidt, J.; Seryi, A.; Shaposhnikova, E.; Sheng, Z.M.; Sherwood, P.; Silva, L.; Soby, L.; Sosedkin, A.P.; Spitsyn, R.I.; Trines, R.; Tuev, P.V.; Turner, M.; Verzilov, V.; Vieira, J.; Vincke, H.; Wei, Y.; Welsch, C.P.; Wing, M.; Xia, G.; Zhang, H.

2016-01-01

The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment at CERN and the world's first proton driven plasma wakefield acceleration experiment. The AWAKE experiment will be installed in the former CNGS facility and uses the 400 GeV/c proton beam bunches from the SPS. The first experiments will focus on the self-modulation instability of the long (rms ~12 cm) proton bunch in the plasma. These experiments are planned for the end of 2016. Later, in 2017/2018, low energy (~15 MeV) electrons will be externally injected to sample the wakefields and be accelerated beyond 1 GeV. The main goals of the experiment will be summarized. A summary of the AWAKE design and construction status will be presented.

7 March 2013 -Stanford University Professor N. McKeown FREng, Electrical Engineering and Computer Science and B. Leslie, Creative Labs visiting CERN Control Centre and the LHC tunnel with Director for Accelerators and Technology S. Myers.

CERN Multimedia

Anna Pantelia

2013-01-01

7 March 2013 -Stanford University Professor N. McKeown FREng, Electrical Engineering and Computer Science and B. Leslie, Creative Labs visiting CERN Control Centre and the LHC tunnel with Director for Accelerators and Technology S. Myers.

Study of muon-induced neutron production using accelerator muon beam at CERN

Energy Technology Data Exchange (ETDEWEB)

Nakajima, Y.; Lin, C. J.; Ochoa-Ricoux, J. P. [Lawrence Berkeley National Laboratory, Berkeley, California (United States); Draeger, E.; White, C. G. [Illinois Institute of Technology, Chicago, Illinois (United States); Luk, K. B.; Steiner, H. [Lawrence Berkeley National Laboratory, Berkeley, California (United States); Department of Physics, University of California, Berkeley, California (United States)

2015-08-17

Cosmogenic muon-induced neutrons are one of the most problematic backgrounds for various underground experiments for rare event searches. In order to accurately understand such backgrounds, experimental data with high-statistics and well-controlled systematics is essential. We performed a test experiment to measure muon-induced neutron production yield and energy spectrum using a high-energy accelerator muon beam at CERN. We successfully observed neutrons from 160 GeV/c muon interaction on lead, and measured kinetic energy distributions for various production angles. Works towards evaluation of absolute neutron production yield is underway. This work also demonstrates that the setup is feasible for a future large-scale experiment for more comprehensive study of muon-induced neutron production.

CAS - CERN Accelerator School: Specialised course on Magnets

CERN Document Server

CAS 2009

2010-01-01

These proceedings present the lectures given at the twenty-third specialized course organized by the CERN Accelerator School (CAS), the topic being 'Magnets'. The course was held in Bruges, Belgium, from 16 to 25 June 2009. This is the first time this topic has been selected for a specialized course. Taking into account the number of related applications currently in use in accelerators around the world, but, even more important, the worrying decrease in the corresponding expertise in the different laboratories, it was recognized that such a topic should definitively be incorporated into the CAS series of specialized courses. The specific aim of the course was to introduce the participants to the basics of resistive magnet design and its underlying theoretical concepts. The first part of the school dealt with basic introductory courses such as Maxwell's equations for magnets, beam optics, physics and measurement of magnetic materials, the different types of resistive magnets and their respective performance, ...

CERN Technical Training 2003: Learning for the LHC! : AXEL-2003  -  Introduction to Particle Accelerators

CERN Multimedia

2003-01-01

AXEL-2003 is a course given at CERN within the framework of the Technical Training Programme. The course will present an introduction to particle accelerators. Known in the past as the PS Complex Operation Course (or the "PS Shutdown Course"), and organised by the ex-PS division until last year, it is now organised as a joint venture between the AB division and Technical Training, and open to a wider CERN community. The AXEL-2003 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to all people (technicians, engineers, physicists) interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course and the course supports will be in English, with questions and answers also in French. Lectures will be recorded and available online via the Web Lectu...

CERN, accelerator of motivation

CERN Multimedia

François Becler

2014-01-01

Have your dreams ever come true? My dream did, when I was lucky enough to be allowed into the world’s largest particle physics laboratory and spend five whole days there.   François, in front of LEP's DELPHI detector, displayed in the LHCb cavern. François was given the opportunity to visit the experiment during his placement at CERN. I’m a pupil in my last year at the Collège Jean-Jacques Rousseau in Saint-Julien-en-Genevois and was on a work experience placement at CERN from 16 to 20 December last year. I’m so happy I was chosen because working alongside physicists and engineers of all nationalities was like a dream come true. The first thing that impressed me was the size of the site, its infrastructures and facilities but also the fact that I was working in a prestigious, world-renowned organisation. I spent lots of time looking at the map and trying to find my way around... CERN's such a massive place ! Th...

CERN and the LHC

CERN Multimedia

Cramer, J G

1992-01-01

CERN, a high-energy physics laboratory in Europe, is planning to build a more powerful particle accelerator, the Large Hadronic Collider. The US spreads its accelerators around the country while most of Europe's research is conducted at and around CERN.

Accelerator Studies on a possible Experiment on Proton-Driven Plasma Wakefields at CERN

CERN Document Server

Assmann, R W; Fartoukh, S; Geschonke, G; Goddard, B; Hessler, C; Hillenbrand, S; Meddahi, M; Roesler, S; Zimmermann, F; Caldwell, A; Muggli, P; Xia, G

2011-01-01

There has been a proposal by Caldwell et al to use proton beams as drivers for high energy linear colliders. An experimental test with CERN’s proton beams is being studied. Such a test requires a transfer line for transporting the beam to the experiment, a focusing section for beam delivery into the plasma, the plasma cell and a downstream diagnostics and dump section. The work done at CERN towards the conceptual layout and design of such a test area is presented. A possible development of such a test area into a CERN test facility for high-gradient acceleration experiments is discussed.

Impact of thermal and intermediate energy neutrons on the semiconductor memories for the CERN accelerators

CERN Document Server

Cecchetto, Matteo; Gerardin, Simone

A wide quantity of SRAM memories are employed along the Large Hadron Collider (LHC), the main CERN accelerator, and they are subjected to high levels of ionizing radiations which compromise the reliability of these devices. The Single Event Effect (SEE) qualification for components to be used in the complex high-energy accelerator at CERN relies on the characterization of two cross sections: 200-MeV protons and thermal neutrons. However, due to cost and time constraints, it is not always possible to characterize the SEE response of components to thermal neutrons, which is often regarded as negligible for components without borophosphosilicate glass (BPSG). Nevertheless, as recent studies show, the sensitivity of deep sub-micron technologies to thermal neutrons has increased owing to the presence of Boron 10 as a dopant and contact contaminant. The very large thermal neutron fluxes relative to high-energy hadron fluxes in some of the heavily shielded accelerator areas imply that even comparatively small therm...

Control week at CERN

CERN Multimedia

2008-01-01

From 19 to 23 May, the IT-CO Group will be organising the first "Poster forum" at CERN on the theme of process control. Process control lies at the heart of numerous conferences across the world in which CERN takes an active part. Many posters have been produced, and these deserve to be presented to everybody in order to give value to, share and derive maximum benefit from the software, tools and methods developed and used at CERN in this field. This initiative will also allow each group, section and member of the personnel to present their work to others at the Laboratory. The forum will take place from 19 to 23 May in the main hall of Building 500, leading to Restaurant No. 1, on the Meyrin site. To stimulate discussions and exchanges, the authors will be in attendance by their posters on Thursday 22 May between 12 noon and 2.00 p.m. Interested? If you wish to take part and present your work, please contact mathias.philippe.dutou...

Advanced Control Facility for the CERN-UNICOS Framework

CERN Document Server

Pezzetti, M; Coppier, H

2010-01-01

CERN, during last decade, has extensively applied the CERN/UNICOS framework to large scale cryoplant control system. An increase of interested to advanced control techniques and innovative simulation environment applied to cryogenic processes has also occur. Since new control algorithm development into UNICOS framework requires significant time, a control testing platform which can be externally connected can improve and simplify the procedure of testing advanced controllers implementation. In this context, the present paper describes the development of a control testing tool at CERN, which allows rapid control strategies implementation through the Matlab/Simulink® environment, coupled with the large scale cryogenics UNICOS control system or with the CERN PROCOS simulation environment. The time delays which are inherently introduced by network links and communication protocols are analyzed and experimentally identified. Security and reliability issues are also discussed.

The new generation of PowerPC VMEbus front end computers for the CERN SPS and LEP accelerators system

CERN Document Server

Charrue, P; Ghinet, F; Ribeiro, P

1995-01-01

The CERN SPS and LEP PowerPC project is aimed at introducing a new generation of PowerPC VMEbus processor modules running the LynxOS real-time operating system. This new generation of front end computers using the state-of-the-art microprocessor technology will first replace the obsolete XENIX PC based systems (about 140 installations) successfully used since 1988 to control the LEP accelerator. The major issues addressed in the scope of this large scale project are the technical specification for the new PowerPC technology, the re-engineering aspects, the interfaces with other CERN wide projects, and the set up of a development environment. This project offers also support for other major SPS and LEP projects interested in the PowerPC microprocessor technology.

Computer Security: Security operations at CERN (4/4)

CERN Document Server

CERN. Geneva

2012-01-01

Stefan Lueders, PhD, graduated from the Swiss Federal Institute of Technology in Zurich and joined CERN in 2002. Being initially developer of a common safety system used in all four experiments at the Large Hadron Collider, he gathered expertise in cyber-security issues of control systems. Consequently in 2004, he took over responsibilities in securing CERN's accelerator and infrastructure control systems against cyber-threats. Subsequently, he joined the CERN Computer Security Incident Response Team and is today heading this team as CERN's Computer Security Officer with the mandate to coordinate all aspects of CERN's computer security --- office computing security, computer centre security, GRID computing security and control system security --- whilst taking into account CERN's operational needs. Dr. Lueders has presented on these topics at many different occasions to international bodies, governments, and companies, and published several articles. With the prevalence of modern information technologies and...

New life for CERN's first accelerator

CERN Multimedia

Anaïs Schaeffer

2011-01-01

Building 300 right in the middle of the CERN site houses a special "antique": the Laboratory's very first accelerator. After several years in the wilderness following its decommissioning in 1990, the Synchrocyclotron is set to take on a new lease of life in the near future, this time as a visitor attraction.   The Synchrocyclotron as it was in 1975; it will be restored to this configuration for public viewing. The Synchrocyclotron (SC) began operation in 1957, two years before the PS was commissioned. Running at an energy of 600 MeV and producing beams of protons, neutrons, muons and pions, it helped to further research in the nuclear physics field for no fewer than 33 years, providing beams for various decay experiments as well as the muon capture experiment (*). Since the SC was decommissioned in 1990, three of its four buildings (160, 161 and 301) have been converted into offices for members of the ALICE collaboration, but the shielded hall housing the machine it...

Accelerator shielding experts meet at CERN

CERN Multimedia

CERN Bulletin

2010-01-01

Fifteen years after its first CERN edition, the Shielding Aspects of Accelerator, Targets and Irradiation Facility (SATIF) conference was held again here from 2-4 June. Now at its 10th edition, SATIF10 brought together experts from all over the world to discuss issues related to the shielding techniques. They set out the scene for an improved collaboration and discussed novel shielding solutions.   This was the most attended meeting of the series with more than 65 participants from 34 institutions and 14 countries. “We welcomed experts from many different laboratories around the world. We come from different contexts but we face similar problems. In this year’s session, among other things, we discussed ways for improving the effectiveness of calculations versus real data, as well as experimental solutions to investigate the damage that radiation produces on various materials and the electronics”, says Marco Silari, Chair of the conference and member of the DGS/RP gro...

Nonlinear predictive control in the LHC accelerator

CERN Document Server

Blanco, E; Cristea, S; Casas, J

2009-01-01

This paper describes the application of a nonlinear model-based control strategy in a real challenging process. A predictive controller based on a nonlinear model derived from physical relationships, mainly heat and mass balances, has been developed and commissioned in the inner triplet heat exchanger unit (IT-HXTU) of the large hadron collider (LHC) particle accelerator at European Center for Nuclear Research (CERN). The advanced regulation\\ maintains the magnets temperature at about 1.9 K. The development includes a constrained nonlinear state estimator with a receding horizon estimation procedure to improve the regulator predictions.

Software factory techniques applied to process control at CERN

CERN Document Server

Dutour, Mathias D

2008-01-01

The CERN Large Hadron Collider (LHC) requires constant monitoring and control of quantities of parameters to guarantee operational conditions. For this purpose, a methodology called UNICOS (UNIfied Industrial COntrols Systems) has been implemented to standardize the design of process control applications. To further accelerate the development of these applications, we migrated our existing UNICOS tooling suite toward a software factory in charge of assembling project, domain and technical information seamlessly into deployable PLC (Programmable logic Controller) - SCADA (Supervisory Control And Data Acquisition) systems. This software factory delivers consistently high quality by reducing human error and repetitive tasks, and adapts to user specifications in a cost-efficient way. Hence, this production tool is designed to encapsulate and hide the PLC and SCADA target platforms, enabling the experts to focus on the business model rather than specific syntaxes and grammars. Based on industry standard software, ...

Follow-up research at CERN

International Nuclear Information System (INIS)

1993-01-01

At The European Center for High Energy Physics (Conseil Europeen de Recherche Nucleaire - CERN) basic research is carried out based on some of the world's largest particle accelerators, especially the Large Electron Positron collider (LEP). Danish membership of CERN gives Danish physicists access to these machines and the Accelerator Committee offers advice on their utilization and related financing. Danish research carried out at CERN is described, based on contributions from individual research groups. The functions, administration and budgets of the Accelerator Committee are explained in addition to other forms of administration connected with CERN, such as the Danish CERN Delegation, and an evaluation of Danish experimentation within physics is presented. Information is given on individual Danish members of the CERN groups of scientists and a list of the publications of international research groups which include Danish subjects, covering the years 1991-93, is presented. The publication is related to the delegation of grants for research projects carried out by Danish physicists. (AB)

CAS CERN Accelerator School. Synchrotron radiation and free electron lasers. Proceedings

International Nuclear Information System (INIS)

Turner, S.

1998-01-01

These proceedings present the lectures given at the tenth specialised course organised by the CERN Accelerator School (CAS), the topic this time being 'Synchrotron Radiation and Free-electron Lasers'. A similar course was already given at Chester, UK in 1989 and whose proceedings were published as CERN 90-03. However, recent progress in this field has been so rapid that it became urgent to present a revised version of the course. Starting with a review of the characteristics of synchrotron radiation there follows introductory lectures on electron dynamics in storage rings, beam insertion devices, and beam current and radiation brightness limits. These themes are then developed with more detailed lectures on lattices and emittance, wigglers and undulators, current limitations, beam lifetime and quality, diagnostics and beam stability. Finally lectures are presented on linac and storage ring free-electron lasers. (orig.)

CAS CERN Accelerator School: Cyclotrons, linacs and their applications. Proceedings

International Nuclear Information System (INIS)

Turner, S.

1996-01-01

These proceedings present the lectures given at the eighth specialized course organized by the CERN Accelerator School (CAS), the topic this time being 'Cyclotrons, Linacs and Their Applications'. Following an introductory lecture on linacs, the fundamental features of electron, ion and induction linacs are described together with their RF systems and particle sources. Cyclotrons are then introduced followed by details of their different types, their magnet and RF design, and their injection and extraction systems, with a glance towards exotic and possible future machines. Chapters are then presented on the use of linacs and cyclotrons for medical, fission, fusion and material applications, as well as for isotope production. Finally, descriptions of the design of a radioisotope facility, the matching of accelerators to their task and the computational tools used in their design are included. (orig.)

CAS CERN Accelerator School: Cyclotrons, linacs and their applications. Proceedings

Energy Technology Data Exchange (ETDEWEB)

Turner, S [ed.

1996-03-04

These proceedings present the lectures given at the eighth specialized course organized by the CERN Accelerator School (CAS), the topic this time being `Cyclotrons, Linacs and Their Applications`. Following an introductory lecture on linacs, the fundamental features of electron, ion and induction linacs are described together with their RF systems and particle sources. Cyclotrons are then introduced followed by details of their different types, their magnet and RF design, and their injection and extraction systems, with a glance towards exotic and possible future machines. Chapters are then presented on the use of linacs and cyclotrons for medical, fission, fusion and material applications, as well as for isotope production. Finally, descriptions of the design of a radioisotope facility, the matching of accelerators to their task and the computational tools used in their design are included. (orig.).

How to Successfully Renovate a Controls System? - Lessons Learned from the Renovation of the CERN Injectors’ Controls Software

CERN Document Server

Kruk, G; Kulikova, O; Lezhebokov, V; Pace, M; Pera Mira, P; Roux, E; Wozniak, J Pawel

2014-01-01

Renovation of the control system of the CERN LHC injectors was initiated in 2007 in the scope of the Injector Controls Architecture (InCA) project. One of its main objectives was to homogenize the controls software across CERN accelerators and reuse as much as possible the existing modern sub-systems, such as the settings management used for the LHC. The project team created a platform that would permit coexistence and intercommunication between old and new components via a dedicated gateway, allowing a progressive replacement of the former. Dealing with a heterogeneous environment, with many diverse and interconnected modules, implemented using different technologies and programming languages, the team had to introduce all the modifications in the smoothest possible way, without causing machine downtime. After a brief description of the system architecture, the paper discusses the technical and non-technical sides of the renovation process such as validation and deployment methodology, operational applicatio...

CERN openlab Open Day

CERN Multimedia

Andrew Purcell

2015-01-01

CERN openlab is the unique public-private partnership between CERN and leading companies in the field of information and communication technology. The programme is now entering an exciting new phase and is expanding to include other public research organisations for the first time. A special event will be held at CERN to mark this occasion.   CERN openlab was created in 2001 and is now entering its fifth three-year phase (2015-2017). Its mission is to accelerate the development of cutting-edge solutions to be used by the scientific community to control the operations of complex machines and to analyse the vast amounts of data produced by physics experiments. During Run 2 of the LHC, it is expected that the CERN Data Centre will store more than 30 petabytes of data per year from the LHC experiments, which is equivalent to about 1.2 million Blu-ray discs, or 250 years of HD video. Testing in this demanding environment provides the companies collaborating in CERN openlab with valuable feedback o...

The 1956 CERN Symposium

CERN Document Server

Jarlskog, Cecilia

2014-01-01

CERN, currently the largest organization in the world for particle physics, was founded in 1954. Originally located in Meyrin, at the outskirts of the city of Geneva in Switzerland, it has with time extended into neighboring France. The Theoretical Study Division of CERN, however, was created already in 1952, i.e., before the official inauguration of CERN. It was situated in Copenhagen. Christian Møller [1] was appointed (part-time) as the Director and there were two full time senior staff members, Gunnar Källén and Ben R. Mottelson. While constructing buildings and accelerators were in progress, an international conference was organized by CERN in the city of Geneva. This “CERN Symposium on High Energy Accelerators and Pion Physics”, 11–23 June 1956, attracted about 250 participants from outside CERN, among them at least 18 Nobel Laureates or future Laureates. Unfortunately, the participants from CERN are not listed in the Proceedings [2]. The conference focused on measuring devices such as bubbl...

CERN Heavy-Ion Facility design report

International Nuclear Information System (INIS)

Warner, D.; Angert, N.; Bourgarel, M.P.; Brouzet, E.; Cappi, R.; Dekkers, D.; Evans, J.; Gelato, G.; Haseroth, H.; Hill, C.E.; Hutter, G.; Knott, J.; Kugler, H.; Lombardi, A.; Lustig, H.; Malwitz, E.; Nitsch, F.; Parisi, G.; Pisent, A.; Raich, U.; Ratzinger, U.; Riccati, L.; Schempp, A.; Schindl, K.; Schoenauer, H.; Tetu, P.; Umstaetter, H.H.; Rooij, M. van; Weiss, M.

1993-01-01

The design of the CERN Heavy-Ion Facility is described. This facility will be based on a new ion linear accelerator (Linac 3), together with improvements to the other accelerators of the CERN complex to allow them to cope with heavy ions, i.e. to the Proton Synchrotron Booster (PSB), the Proton Synchrotron (PS) and the Super Proton Synchrotron (SPS). For this reference design, the pure isotope of lead, 208 Pb, is considered. The bulk of the report describes Linac 3, a purpose-built heavy-ion linac mainly designed and constructed in collaboration with several CERN member state laboratories, but also with contributions from non-member states. Modifications and improvements to existing CERN accelerators essentially concern the RF acceleration, beam control and beam monitoring (all machines), beam kickers and septa at the input and output of the PSB, and major vacuum improvements, aiming to reduce the pressure by factors of at least seven and three in the PSB and PS respectively. After injection from the Electron Cyclotron Resonance source at 2.5 keV/u the partially stripped heavy-ion beam is accelerated successively by a Radio Frequency Quadrupole and an Interdigital-H linac to 4.2 MeV/u. After stripping to 208 Pb 53+ , the beam is again accelerated, firstly in the PSB (to 98.5 MeV/u), then in the PS (to 4.25 GeV/u). The final stage of acceleration in the SPS takes the fully stripped 208 Pb 82+ ions to 177 GeV/u, delivering a beam of 4.10 8 ions per SPS supercycle (15.2 s) to the experiments. The first physics run with lead ions is scheduled for the end of 1994. Finally, some requirements for carrying out heavy-ion physics at the Large Hadron Collider are mentioned. (orig.)

The planned replacement of a functioning control system on the CERN 28 GEV accelerator

International Nuclear Information System (INIS)

Carpenter, B.E.; Daneels, A.; Perriollat, F.

1979-01-01

The subject is discussed under the following headings: the accelerators (in the 28 GeV accelerator complex) and the old control system; goals of the new control system; constraints (involved in planning a replacement for the control system); a pilot project; major software issues in the system design; portability; parallelism; transition; conclusion. (U.K.)

CERN, Accelerating Science (bilingual brochure)

CERN Multimedia

Kahle, Kate

2016-01-01

What is the Universe made of? Where did it come from, where is it going and why does it behave the way it does? These are some of the questions that CERN set out to address when a small number of pioneering scientists created Europe’s first scientific international organization. Founded in 1954, in the aftermath of the Second World War, CERN is not only a first-class centre for fundamental research but also a pioneering adventure in international collaboration.

Software factory techniques applied to Process Control at CERN

CERN Multimedia

Dutour, MD

2007-01-01

The CERN Large Hadron Collider (LHC) requires constant monitoring and control of quantities of parameters to guarantee operational conditions. For this purpose, a methodology called UNICOS (UNIfied Industrial COntrols Systems) has been implemented to standardize the design of process control applications. To further accelerate the development of these applications, we migrated our existing UNICOS tooling suite toward a software factory in charge of assembling project, domain and technical information seamlessly into deployable PLC (Programmable logic Controller) – SCADA (Supervisory Control And Data Acquisition) systems. This software factory delivers consistently high quality by reducing human error and repetitive tasks, and adapts to user specifications in a cost-efficient way. Hence, this production tool is designed to encapsulate and hide the PLC and SCADA target platforms, enabling the experts to focus on the business model rather than specific syntaxes and grammars. Based on industry standard software...

Resistance to ionizing radiations of materials installed at the CERN accelerators

International Nuclear Information System (INIS)

Schoenbacher, H.

1982-01-01

All materials installed in high energy accelerators along the lines of primary and secondary beams are exposed to ionizing radiation. This can in certain cases cause a degradation of the properties of these materials and consequently affect the good function of the installation. The author has taken at CERN large number of samples of materials in order to determine their radioresistance. Generally the organic materials and the electronic components are more sensitive to ionizing radiation. The author presents the results of these studies which concern the isolations of the cables (polyethylene, polyvinyl chloride, caoutchouc ethylene propylene, etc.), the isolations for the magnets on the base of epoxy resins, as well as other thermoresistant and thermoplastic products. The author equally presents a choice of materials and components which are used at CERN and which are resistant to radiations above an integral dose of 10 7 -10 8 Gy. (orig.)

The database for accelerator control in the CERN PS Complex

International Nuclear Information System (INIS)

Cuperus, J.H.

1987-01-01

The use of a database started 7 years ago and is an effort to separate logic from data so that programs and routines can do a larger number of operations on data structures without knowing a priori the contents of these structures. It is of great help in coping with the complexities of a system controlling many linked accelerators and storage rings

Feasibility study concerning a possible layout for a lead-ion injector for the CERN accelerator complex

International Nuclear Information System (INIS)

Haseroth, H.; Lombardi, A.; Weiss, M.

1987-01-01

A possible machine layout for acceleration of lead ions is presented, based on the experience gained with the successful - but painful - acceleration of oxygen ions in the CERN Linac. The scenario consists of an ECR source, a RFQ and an Alvarez Linac. One has tried to optimize the parameters within the restrictions of the space available, keeping in mind the requirements and desiderata of the subsequent machines

The new generation of PowerPC VMEbus front end computers for the CERN SPS and LEP accelerators system

OpenAIRE

Charrue, P; Bland, A; Ghinet, F; Ribeiro, P

1995-01-01

The CERN SPS and LEP PowerPC project is aimed at introducing a new generation of PowerPC VMEbus processor modules running the LynxOS real-time operating system. This new generation of front end computers using the state-of-the-art microprocessor technology will first replace the obsolete XENIX PC based systems (about 140 installations) successfully used since 1988 to control the LEP accelerator. The major issues addressed in the scope of this large scale project are the technical specificatio...

Restart of the LHC. CERN and the accelerators. The world machine illustratively explained; Neustart des LHC. CERN und die Beschleuniger. Die Weltmaschine anschaulich erklaert

Energy Technology Data Exchange (ETDEWEB)

Hauschild, Michael

2016-07-01

The following topics are dealt with: The development of the European research center for particle physics CERN, the standard model of elementary-particle physics, the detection of the W and Z bosons with the SPS collider, the principles of particle accelerators, the way to the LHC. (HSI)

Electron cloud in the CERN accelerators (PS, SPS, LHC)

International Nuclear Information System (INIS)

Iadarola, G; Rumolo, G

2013-01-01

Several indicators have pointed to the presence of an Electron Cloud (EC) in some of the CERN accelerators, when operating with closely spaced bunched beams. In particular, spurious signals on the pick ups used for beam detection, pressure rise and beam instabilities were observed at the Proton Synchrotron (PS) during the last stage of preparation of the beams for the Large Hadron Collider (LHC), as well as at the Super Proton Synchrotron (SPS). Since the LHC has started operation in 2009, typical electron cloud phenomena have appeared also in this machine, when running with trains of closely packed bunches (i.e. with spacings below 150ns). Beside the above mentioned indicators, other typical signatures were seen in this machine (due to its operation mode and/or more refined detection possibilities), like heat load in the cold dipoles, bunch dependent emittance growth and degraded lifetime in store and bunch-by-bunch stable phase shift to compensate for the energy loss due to the electron cloud. An overview of the electron cloud status in the different CERN machines (PS, SPS, LHC) will be presented in this paper, with a special emphasis on the dangers for future operation with more intense beams and the necessary countermeasures to mitigate or suppress the effect. (author)

All Digital IQ Servo-System for CERN Linacs

CERN Document Server

Broere, J; Garoby, R; Rohlev, A; Serrano, J

2004-01-01

A VME based control system has been developed and built at CERN for the servo loops regulating the field in linac accelerating structures. It is an all-digital system built on a single VME card, providing digital detection, processing, and modulation. It is foreseen to be used, in different versions, for the needs of both present and future CERN hadron linacs. The first application will be in the energy ramping RF chain of the CERN Heavy Ion Linac (linac 3). Design principle and the experimental results are described.

CERN

CERN Multimedia

2007-01-01

"Geat ready for the mother of all particle accelerator: the Large Hadron Collider (LHC), nearing completion at CERN, the International particle physics lab headquartered in Geneva, Switzerland." (1 paragraph)

Radiological Characterization of TFA metallic tubes from CERN Accelerator Complex

CERN Document Server

Saraiva, João Pedro de Carvalho; Carvalho, João

The scope of this thesis consists in the radiological characterization of chilled water pipes used for air-conditioning and exposed to ionizing radiation in the PS accelerator, one of the CERN accelerators, for more than 40 years. Due to corrosion problems, the 1200 m of steel pipeline were removed from the PS tunnel during the long shutdowns between the years 2000 to 2004. The radiological characterization, that included the use of FLUKA Monte Carlo simulations and the JEREMY code, began in mid-2011 and revealed a radionuclide inventory with the presence of 55Fe as dominant radionuclide and 60Co as dominant gamma emitter. Due to operational reasons, only 5.5% of the pipeline were characterized for validation. In the course of this work it was found that the contribution of both aforementioned radionuclides corresponds to more than 90% of the total computed IRAS factor (Indice Radiologique d’Acceptation en Stokage). Two different methods were used for the characterization of the PS pipes, yielding two diffe...

The CERN's year

International Nuclear Information System (INIS)

Chadli, M.; Coppier, H.; Pezzeti, M.

2007-01-01

CERN, the European organization for nuclear research, has just celebrated its fifty years of existence. Its first goal was to counterbalance the migration of physics scientists towards the USA by the creation of a physics laboratory gathering scientists from the different European countries. Today, the CERN's mission has changed and has overcome all the expectations of its founders. In 2008, it will become, with the LHC (Large Hadron Collider), the biggest particle accelerator in the world. The CERN employs about 3000 physicists, engineers, technicians and workers. There is also 6500 people from 80 different countries who use the CERN's facilities during the year. The CERN is controlled by 20 European member states and 6 observer countries, and 20 non-member countries participate to the programs in progress. The CERN's power comes from its international and cosmopolitan spirit. The whole most famous physicists of the world can work together for the progress of science and for a better understanding of matter, of its interactions and of our universe. Two Nobel prices of physics come from the CERN: C. Rubbia and S. Van der Meer in 1983 for the discovery of W + , W - and Z 0 bosons, and G. Charpak for the development of particle detectors. One can foresee that the LHC will allow new scientific achievements, like for instance, during experiments for the quest of the famous Higgs boson. It is important also to mention that the CERN has been at the origin of several technological innovations in all technical and engineering domains in the framework of its fundamental physics researches. (J.S.)

External radiation exposure control system in accelerator facilities

International Nuclear Information System (INIS)

Ogawa, Tatsuhiko; Iimoto, Takeshi; Kosako, Toshiso

2011-01-01

The external exposure control systems in KEK and CERN are discussed to find out good practices and unreasonableness of radiation control in accelerator facilities, which plays an important role in optimizing national and/or site specific radiological regulations, referring to relevant ICRP publications. Personal dose limits and radiation area classifications were analyzed and their reasonableness were explored. Good example of supervised areas, area classification based on realistic assumptions on working time etc are found. On the other hand, unreasonable systems, that are often attributed to the national regulation or ideas presented in the old publications are also found. (author)

The CERN's year; L'annee du CERN

Energy Technology Data Exchange (ETDEWEB)

Chadli, M. [Universite de Picardie Jules Verne, CREA, 80 - Amiens (France); Coppier, H. [Ecole Superieure d' Ingenieurs en Electrotechnique et Electronique d' Amiens - ESIEE Amiens, 80 - Amiens (France); Pezzeti, M. [Conseil Europeen pour la Recherche Nucleaire (CERN), Geneve (Switzerland)

2007-12-15

CERN, the European organization for nuclear research, has just celebrated its fifty years of existence. Its first goal was to counterbalance the migration of physics scientists towards the USA by the creation of a physics laboratory gathering scientists from the different European countries. Today, the CERN's mission has changed and has overcome all the expectations of its founders. In 2008, it will become, with the LHC (Large Hadron Collider), the biggest particle accelerator in the world. The CERN employs about 3000 physicists, engineers, technicians and workers. There is also 6500 people from 80 different countries who use the CERN's facilities during the year. The CERN is controlled by 20 European member states and 6 observer countries, and 20 non-member countries participate to the programs in progress. The CERN's power comes from its international and cosmopolitan spirit. The whole most famous physicists of the world can work together for the progress of science and for a better understanding of matter, of its interactions and of our universe. Two Nobel prices of physics come from the CERN: C. Rubbia and S. Van der Meer in 1983 for the discovery of W{sup +}, W{sup -} and Z{sub 0} bosons, and G. Charpak for the development of particle detectors. One can foresee that the LHC will allow new scientific achievements, like for instance, during experiments for the quest of the famous Higgs boson. It is important also to mention that the CERN has been at the origin of several technological innovations in all technical and engineering domains in the framework of its fundamental physics researches. (J.S.)

Towards full automation of accelerators through computer control

CERN Document Server

Gamble, J; Kemp, D; Keyser, R; Koutchouk, Jean-Pierre; Martucci, P P; Tausch, Lothar A; Vos, L

1980-01-01

The computer control system of the Intersecting Storage Rings (ISR) at CERN has always laid emphasis on two particular operational aspects, the first being the reproducibility of machine conditions and the second that of giving the operators the possibility to work in terms of machine parameters such as the tune. Already certain phases of the operation are optimized by the control system, whilst others are automated with a minimum of manual intervention. The authors describe this present control system with emphasis on the existing automated facilities and the features of the control system which make it possible. It then discusses the steps needed to completely automate the operational procedure of accelerators. (7 refs).

Towards full automation of accelerators through computer control

International Nuclear Information System (INIS)

Gamble, J.; Hemery, J.-Y.; Kemp, D.; Keyser, R.; Koutchouk, J.-P.; Martucci, P.; Tausch, L.; Vos, L.

1980-01-01

The computer control system of the Intersecting Storage Rings (ISR) at CERN has always laid emphasis on two particular operational aspects, the first being the reproducibility of machine conditions and the second that of giving the operators the possibility to work in terms of machine parameters such as the tune. Already certain phases of the operation are optimized by the control system, whilst others are automated with a minimum of manual intervention. The paper describes this present control system with emphasis on the existing automated facilities and the features of the control system which make it possible. It then discusses the steps needed to completely automate the operational procedure of accelerators. (Auth.)

Radiation safety at CERN

Energy Technology Data Exchange (ETDEWEB)

Hoefert, M [CERN, Geneva (Switzerland)

1995-09-01

CERN, the European Laboratory for Particle Physics, operates proton accelerators up to an energy of 450 GeV and an electron-positron storage ring in the 50 GeV energy range for fundamental high-energy particle physics. A strong radiation protection group assures the radiation safety of these machines both during their operation and in periods of maintenance and repair. Particular radiation problems in an accelerator laboratory are presented and recent developments in radiation protection at CERN discussed. (author)

Industrial Activity at CERN

CERN Document Server

Kowalik, G

2000-01-01

The decrease in the number of CERN staff creates the need for optimization of the non-core, infrastructure-related activities. An industrial, service-orientated approach has long been considered as an appropriate way to cope with the problem of diminishing resources. This paper presents industrial and service activity issues at CERN based on the experience of the exploitation of the power network. The most important problems linked to the application of the industrial approach to the exploitation of equipment in the CERN research environment are covered. These include the interface between accelerators and electrical exploitation services, external and internal regulations, sharing of responsibility between CERN staff and external contractors, continuous modification of clients' requirements, the balance between the cost of accelerator downtime versus the cost of infrastructure upgrade. A benchmarking through a comparison with a big industrial manufacturer is followed by recommendations for possible improveme...

Control protocol: large scale implementation at the CERN PS complex - a first assessment

International Nuclear Information System (INIS)

Abie, H.; Benincasa, G.; Coudert, G.; Davydenko, Y.; Dehavay, C.; Gavaggio, R.; Gelato, G.; Heinze, W.; Legras, M.; Lustig, H.; Merard, L.; Pearson, T.; Strubin, P.; Tedesco, J.

1994-01-01

The Control Protocol is a model-based, uniform access procedure from a control system to accelerator equipment. It was proposed at CERN about 5 years ago and prototypes were developed in the following years. More recently, this procedure has been finalized and implemented at a large scale in the PS Complex. More than 300 pieces of equipment are now using this protocol in normal operation and another 300 are under implementation. These include power converters, vacuum systems, beam instrumentation devices, RF equipment, etc. This paper describes how the single general procedure is applied to the different kinds of equipment. The advantages obtained are also discussed. ((orig.))

The on-line repair, improvement and expansion of a working multicomputer control system for the CERN SPS accelerator

International Nuclear Information System (INIS)

Altaber, J.; Beck, F.; Collins, M.; Crowley-Milling, M.C.; Rausch, R.

1979-01-01

The 400 GeV proton synchrotron at CERN was first commissioned in 1976. Those of its features which are pertinent to the design of the control system are summarized. The paper then proceeds as follows: changes to the control system (changes to applications programs, equipment handling routines, system software changes); hardware increases and repairs; changes to the character of the system (hardware changes, microprocessors); conclusions. (U.K.)

Control system design of the CERN/CMS tracker thermal screen

CERN Document Server

Carrone, E

2003-01-01

The Tracker is one of the CMS (Compact Muon Solenoid experiment) subdetectors to be installed at the LHC (Large Hadron Collider) accelerator, scheduled to start data taking in 2007 at CERN (European Organization for Nuclear Research). The tracker will be operated at a temperature of -10 degree C in order to reduce the radiation damage on the silicon detectors; hence, an insulated environment has to be provided by means of a screen that introduces a thermal separation between the Tracker and the neighboring detection systems. The control system design includes a formal description of the process by means of a thermodynamic model; then, the electrical equivalence is derived. The transfer function is inferred by the ratio of the voltage on the outer skin and the voltage input, i.e. the ratio of the temperature outside the tracker and the heat generated (which is the controlled variable). A PID (Proportional Integral Derivative) controller has been designed using MatLab. The results achieved so far prove that thi...

CERN technology in the service of medicine

CERN Multimedia

2001-01-01

The prototype of the first module of the LInac BOster (LIBO) has been constructed and tested at CERN. This new medical accelerator offers new perspectives in deep-seated tumour treatment.   Accelerator technology developed at CERN is set to bring about important advances in cancer therapy. The linac booster - LIBO - project aims to build a 3GHz proton linear accelerator to boost to 200 MeV the energy of the beam from 50-70 MeV cyclotrons, existing in several hospitals and laboratories. This will allow deep-seated tumours to be treated (see box). The prototype of the first LIBO module has just passed high power RF tests at CERN. Two members of the LIBO collaboration, Riccardo Zennaro and Paolo Berra, with the first LIBO module installed in the LIL tunnel. The LIBO idea goes back to 1993 when it was conceived by CERN's Ugo Amaldi, founder of Italy's TERA foundation. From the beginning, Mario Weiss, a former CERN staff member has led the project. A decisive step was taken in 1998 when a collaboration...

A New Concept of Controller for Accelerators' Magnet Power Supplies

Science.gov (United States)

Visintini, Roberto; Cleva, Stefano; Cautero, Marco; Ciesla, Tomasz

2016-04-01

The complexity of a particle accelerator implies the remote control of very large numbers of devices, with many different typologies, either distributed along the accelerator or concentrated in locations, often far away from each other. Local and global control systems handle the devices through dedicated communication channels and interfaces. Each controlled device is practically a “smart node” performing a specific task. In addition, very often, those tasks are managed in real-time mode. The performances required to the control interface has an influence on the cost of the distributed nodes as well as on their hardware and software implementation. In large facilities (e.g. CERN) the “smart nodes” derive from specific in-house developments. Alternatively, it is possible to find on the market commercial devices, whose performances (and prices) are spread over a broad range, and spanning from proprietary design (customizable to the user's needs) to open source/design. In this paper, we will describe some applications of smart nodes in the particle accelerators field, with special focus on the power supplies for magnets. In modern accelerators, in fact, magnets and their associated power supplies constitute systems distributed along the accelerator itself, and strongly interfaced with the remote control system as well as with more specific (and often more demanding) orbit/trajectory feedback systems. We will give examples of actual systems, installed and operational on two light sources, Elettra and FERMI, located in the Elettra Research Center in Trieste, Italy.

Monitoring of conventional environmental parameters at CERN Annual Report 2003

CERN Document Server

Kleiner, S

2004-01-01

The monitoring programme for conventional environmental parameters at CERN comprises the control of water released from CERN installations, checks of water quality in rivers receiving water from CERN and monitoring of ambient air quality at places close to the CERN sites. The control of released water includes continuous monitoring of pH and temperature at six CERN water outlets and periodical sampling and analysis campaigns to check in more details the quality of the water released from the CERN sites. Regular measurements of pH, temperature, concentration of dissolved oxygen and conductivity were performed in the water of the rivers Nant d'Avril (CH) and Le Lion (F) as well as in the water of the streams around the seven LHC sites PA2 − PA8. The concentrations of nitrogen oxides and ozone in the ambient air, which may be produced in accelerator facilities and released into the environment, were measured at two off-site monitoring stations in Maisonnex (CH) and Cessy (F). The report summarises the results ...

Monitoring of conventional environmental parameters at CERN Annual Report 2004

CERN Document Server

Dziewa, A

2005-01-01

The monitoring programme for conventional environmental parameters at CERN comprises the control of water released from CERN installations, checks of water quality in rivers receiving water from CERN and monitoring of ambient air quality at places close to the CERN sites. The control of released water includes continuous monitoring of pH and temperature at six CERN water outlets and periodical sampling and analysis campaigns to check in more details the quality of the water released from the CERN sites. Sporadic river-water analyses and regular measurements of pH, temperature, concentration of dissolved oxygen and conductivity, were performed in the water of the rivers Nant d'Avril (CH) and Le Lion (F) as well as in the water of the streams around the seven LHC sites PA2 − PA8. The concentrations of nitrogen oxides and ozone in the ambient air, which may be produced in accelerator facilities and released into the environment, were measured at two off-site monitoring stations in Maisonnex (CH) and Cessy (F)....

CERN boss quashes LHC delay rumours

CERN Multimedia

2007-01-01

"Robert Aymar, the director general of CERN, has dispelled rumours that a series of buckled electrical connectors at the Large Hadron Collider will delay the accelerator's official start-up date of May 2008. Writing in this week's CERN Bulletin, Aymar says that the problem concerns only a small percentage of the connectors and that it is "business as usual" for bringing the new accelerator online." (1,5 page)

Lecture 8: Data Reliability at CERN and Ideas on How to Improve it

CERN Multimedia

CERN. Geneva

2013-01-01

The talk will give an overview of data management activities at CERN focusing on the ongoing research activities aiming to improve data and service reliability. Alberto Pace is a member if the IT department at CERN where he leads the Data and Storage services group ensuring a coherent development process for Physics Data management activities, strongly driven by operational and user needs. He has more than 25 years experience in computing services, infrastructure, software engineering, accelerator control and accelerator operation. He graduated in Electronic Engineering from Politecnico di Milano (Italy).

submitter Radiation Protection Studies for CERN LINAC4/SPL Accelerator Complex

CERN Document Server

Mauro, Egidio; Silari, Marco

2009-01-01

CERN is presently designing a new chain of accelerators to replace the present Proton Synchrotron (PS) complex: a 160 MeV room-temperature H$^-$ linac (Linac4) to replace the present 50 MeV proton linac injector, a 3.5 GeV Superconducting Proton Linac (SPL) to replace the 1.4 GeV PS booster (PSB) and a 50 GeV synchrotron (named PS2) to replace the 26 GeV PS. Linac4 has been funded and the civil engineering work started in October 2008, whilst the SPL is in an advanced stage of design. Beyond injecting into the future 50 GeV PS, the ultimate goal of the SPL is to generate a 4 MW beam for the production of intense neutrino beams. The radiation protection design is driven by the latter requirement. This thesis summarizes the radiation protection studies conducted for Linac4. FLUKA Monte Carlo simulations, complemented by analytical estimates, were performed 1) to evaluate the propagation of neutrons through the waveguide, ventilation and cable ducts placed along the accelerator, 2) to estimate the radiological i...

CERN Library | Mario Campanelli presents "Inside CERN's Large Hadron Collider" | 16 March

CERN Multimedia

CERN Library

2016-01-01

"Inside CERN's Large Hadron Collider" by Mario Campanelli. Presentation on Wednesday, 16 March at 4 p.m. in the Library (bldg 52-1-052) The book aims to explain the historical development of particle physics, with special emphasis on CERN and collider physics. It describes in detail the LHC accelerator and its detectors, describing the science involved as well as the sociology of big collaborations, culminating with the discovery of the Higgs boson.  Inside CERN's Large Hadron Collider  Mario Campanelli World Scientific Publishing, 2015  ISBN 9789814656641​

A Brief History of CERN

CERN Document Server

Laëtitia Pedroso

2011-01-01

CERN's fascinating history, from the period preceding its creation right up to the present day, has inspired many people to take up pen and paper over the years. Recently, Marie Mazzone, a 19-year old student at Geneva's Collège Sismondi, chose it as the subject for her "travail de maturité", which she presented in the form of a comic book.   Cover of "the Accelerator of Peace" comic book by Marie Mazonne. In her comic book, which she entitled "L’accélérateur de paix" (the Accelerator of Peace, see the full PDF), Marie traces CERN's history back to its creation, explaining how the needs of post-war Europe led to the construction of an international scientific laboratory. Marie's four grandparents are all former CERN employees, so the Organization has been part of her life ever since she was small. "I'd always been familiar with the word CERN," she tells us. "But I...

CARE-HHH-APD Workshop on Finalizing the Roadmap for the Upgrade of the CERN and GSI Accelerator Complex

CERN Document Server

Zimmermann, Frank; BEAM'07; BEAM 2007; Finalizing the Roadmap for the Upgrade of the LHC and GSI Accelerator Complex

2008-01-01

This report contains the Proceedings of the CARE-HHH-APD Event BEAM’07, “Finalizing the Roadmap for the Upgrade of the CERN & GSI Accelerator Complex,” which was held at CERN in Geneva, Switzerland, from 1 to 5 October 2007. BEAM’07 was primarily devoted to beam dynamics limitations for the two, or three, alternative baseline scenarios of the LHC luminosity upgrade and to critical design choices for the upgrade of the LHC injector complex at CERN and for the FAIR complex at GSI. It comprised five parts: (1) a Mini-Workshop on LHC+ Beam Performance, (2) a CERN-GSI Meeting on Collective Effects, (3) the Francesco Ruggiero Memorial Symposium, (4) a Mini-Workshop on the LHC Injectors Upgrade, and (5) the BEAM’07 Summaries. Topics addressed in the first mini-workshop of BEAM’07 ranged from the luminosity performance reach of the upgraded LHC in different scenarios, over the generation and stability of the future LHC beams, the turnaround time, beam–beam effects, luminosity levelling methods, and ...

Integrating CERN e-groups into TWiki access control.

CERN Document Server

Jones, PL; Hoymr, N; CERN. Geneva. IT Department

2010-01-01

Wikis allow for easy collaborative editing of documents on the web for users located in different buildings, cities or even countries. TWiki culture lends to open free form editing and most pages are world readable and editable by CERN authenticated users, however access control is possible and is used to protect sensitive documents. This note discusses the integration of E-groups for authorisation purposes at CERN.

POPS: the 60MW power converter for the PS accelerator: Control strategy and performances

CERN Document Server

Boattini, Fulvio; Skawinski, Gregory

2015-01-01

The main power supply of Proton-Synchrotron (PS) accelerator is one of the biggest at CERN. The old rotating machine system has been replaced with a new NPC based DC/DC power supply named POPS (Power system for PS main magnets) with capacitor banks as energy storage mean. POPS is in operation since February 2011. The operation of the PS accelerator requires a specific design of the control system with very high performance requirements in term of accuracy and precision. This paper describes the main lines of the control strategies analyzing the problems encountered and the solutions adopted. The performances of the converter are presented throughout the paper.

Is the CERN recommended SCADA useable for the ST division?

CERN Document Server

Sollander, P; Epting, U

2001-01-01

Supervisory Control and Data Acquisition (SCADA) systems are widely used at CERN and in industrial control environments. In order to limit the costs of purchase, maintenance and support, a recommendation for one SCADA system is in preparation by the SCADA working group. This SCADA system should be used for all CERN in-house developed applications as they exist today e.g. in the Technical Control Room (TCR). This presentation will show the actual environment for the control and monitoring of the technical infrastructure at CERN and the needs for the future LHC infrastructure monitoring. The presentation will cover the control activities of all ST groups represented in the ST Control System WG. A possible solution for the integration of the technical infrastructure data into a SCADA system and a solution for the data exchange with the accelerators and the experiments will be presented. This includes a short term planning for the evaluation period as well as the long-term strategy on how to implement the chosen ...

The LINAC4 Project at CERN

CERN Document Server

Arnaudon, L; Bertone, C; Body, Y; Broere, J; Brunner, O; Buzio, M; Carli, C; Caspers, F; Corso, JP; Coupard, J; Dallocchio, A; Dos Santos, N; Garoby, R; Gerigk, F; Hammouti, L; Hanke, K; Jones, M; Kozsar, I; Lettry, J; Lallement, JB; Lombardi, A; Lopez-Hernandez, LA; Maglioni, C; Mathot, S; Maury, S; Mikulec, B; Nisbet, D; Noels, C; Paoluzzi, M; Puccio, B; Raich, U; Ramberger, S; Rossi, C; Schwerg, N; Scrivens, R; Vandoni, G; Weisz, S; Vollaire, J; Vretenar, M; Zickler, T

2011-01-01

As the first step of a long-term programme aiming at an increase in the LHC luminosity, CERN is building a new 160 MeV H¯ linear accelerator, Linac4, to replace the ageing 50 MeV Linac2 as injector to the PS Booster (PSB). Linac4 is an 86-m long normal-conducting linac made of an H¯ source, a Radio Frequency Quadrupole (RFQ), a chopping line and a sequence of three accelerating structures: a Drift-Tube Linac (DTL), a Cell-Coupled DTL (CCDTL) and a Pi-Mode Structure (PIMS). The civil engineering has been recently completed, and construction of the main accelerator components has started with the support of a network of international collaborations. The low-energy section up to 3 MeV including a 3-m long 352 MHz RFQ entirely built at CERN is in the final construction phase and is being installed on a dedicated test stand. The present schedule foresees beam commissioning of the accelerator in the new tunnel in 2013/14; the moment of connection of the new linac to the CERN accelerator chain will depend on the L...

A Beam Interlock System for CERN High Energy Accelerators

CERN Document Server

Todd, Benjamin; Schmidt, R

2006-01-01

The Large Hadron Collider (LHC) at CERN (The European Organisation for Nuclear Research) is one of the largest and most complicated machines envisaged to date. The LHC has been conceived and designed over the course of the last 25 years and represents the cutting edge of accelerator technology with a collision energy of 14TeV, having a stored beam energy over 100 times more powerful than the nearest competitor. Commissioning of the machine is already nderway and operation with beam is intended for Autumn 2007, with 7TeV operation expected in 2008. The LHC is set to answer some of the fundemental questions in theoretical physics, colliding particles with such high energy that the inner workings of the quantum world can be revealed. Colliding particles together at such high energy makes very high demands on machine operation and protection. The specified beam energy requires strong magnetic fields that are made in superconducting dipole magnets, these magnets are kept only around two degrees above absolute zero...

The control consoles for the CERN 400 GeV proton synchrotron

CERN Document Server

Beck, F; Shering, G

1977-01-01

The European Organization for Nuclear Research (CERN) provides research facilities for investigation into the physics of high energy particles for physicists from 11 European member states and visitors from several continents. To this end it constructs and operates large accelerators, and of these is a 400 GeV proton synchrotron, which is built in a circular tunnel cut into the bedrock, the majority of the equipment being housed in a number of buildings scattered over the surface of the site. Data are gathered in local units, multiplexed into a CAMAC interface, collected into local computers, and sent down high-speed data links to the control centre. Data-collection rates vary from leisurely status changes to megahertz transfer rates on the data links. All links are connected to a message-transfer system in the control centre, as are connections from various central computers giving library, graphics and alarm facilities. The three computers driving the three control consoles are similarly attached to the mes...

People and things. CERN Courier, Jul-Aug 1990, v. 30(6)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1990-07-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; An Oxford Instruments superconducting solenoid magnet which has exceeded 20 Tesla is now available commercially. ; This year's Joint US-CERN School on Particle Accelerators, organized jointly by the CERN Accelerator School and the US Particle Accelerator School, is from 7-14 November and will be hosted by CEBAF. ; The 4th Symposium on Cosmology, Astronomy and Fundamental Physics, organized jointly by CERN and the European Southern Observatory (ESO), and the 15th Texas Symposium on Relativistic Astrophysics are being combined in a joint Texas/ESO-CERN Symposium to be held in Brighton, UK, from 16-21 December.

People and things. CERN Courier, Jul-Aug 1990, v. 30(6)

International Nuclear Information System (INIS)

Anon.

1990-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; An Oxford Instruments superconducting solenoid magnet which has exceeded 20 Tesla is now available commercially. ; This year's Joint US-CERN School on Particle Accelerators, organized jointly by the CERN Accelerator School and the US Particle Accelerator School, is from 7-14 November and will be hosted by CEBAF. ; The 4th Symposium on Cosmology, Astronomy and Fundamental Physics, organized jointly by CERN and the European Southern Observatory (ESO), and the 15th Texas Symposium on Relativistic Astrophysics are being combined in a joint Texas/ESO-CERN Symposium to be held in Brighton, UK, from 16-21 December

The MedAustron Project at CERN, Status Report, May 2013

CERN Document Server

Benedikt, M; Gutleber, J

2013-01-01

MedAustron is a light ion-therapy and research centre based on a synchrotron accelerator complex under construction in Austria. It is the first large-scale accelerator facility in Austria. For the implementation of the required accelerator technologies, the county of Lower Austria and the company EBG MedAustron have set up dedicated agreements with CERN. These cover the assistance of CERN for the design and manufacturing follow-up of accelerator components and training of MedAustron personnel. CERN contributed to the MedAustron construction in particular by providing domain expertise, infrastructure, and manpower in relation with the design, the tendering and procurement processes.\

Radiation control on the CERN sites

International Nuclear Information System (INIS)

Tuyn, J.W.N.; Alberto, D.; Lamberet, C.; Roubaud, G.; Wolf, J.

1998-01-01

The Site Section of the Radiation Protection Group is in charge of general radiation protection activities related to the two CERN sites. During 1997 these activities were: - stray radiation monitoring, - radioactive waste management, - storage of radioactive items, - radioactive source control, - radioactive transport, - control of non-ionizing radiation, - thermoluminescence dosimetry, - radioactivity measurements. A summary of these activities is presented in this part

Radiation control on the CERN sites

International Nuclear Information System (INIS)

Hoefert, M.; Lamberet, C.; Otto, T.; Roubaud, G.; Wolf, J.

1999-01-01

The Site Section of the Radiation Protection Group is in charge of general radiation protection activities related to the two CERN sites. During 1998 these activities were: - stray radiation monitoring, - radioactive waste management, - storage of radioactive items, - radioactive source control, - radioactive transport, - control of non-ionizing radiation, - thermoluminescence dosimetry, - radioactivity measurements. A summary of the activities during 1998 is presented in this part

Accelerators at school

Energy Technology Data Exchange (ETDEWEB)

Anon.

1986-06-15

Latest subject covered by the CERN Accelerator School was 'Applied Geodesy of Particle Accelerators', which attracted an impressive number of outside participants to CERN for a week in April. Since the forerunners of today's particle accelerators were demonstrated over 50 years ago, the positioning of accelerator components has progressed from the laboratory bench-top to tunnels tens of kilometres long. Despite this phenomenal growth in size, sub-millimetre accuracy is still required.

CERN strives to stay ahead

International Nuclear Information System (INIS)

Sutton, Christine.

1987-01-01

The paper examines the future of CERN, with respect to its proposed research programme and its need to save money. Proposals concerning what accelerators CERN should build for the future are outlined; machines such as the Large Hadron Collider and the CERN Linear Collider have been proposed. Experimental expectations for the first Large Electron Positron (LEP) collider (now close to completion) are briefly described, along with the experimental investigations for the second phase of operation of LEP where modifications will increase the machine's energy. Criticisms of CERN's management by its governing body are also discussed. (UK)

CERN, the US and the W

CERN Document Server

Crease, Robert P

2004-01-01

In 1983, CERN physicists discovered the W boson earning them the first Nobel prize. This discovery served as the turning point for CERN from the point of view of the self-confidence of its physicists, the confidence of its fund-raisers, and its reputation in the US. However, this feat did not come as easy for CERN. Rivalry with the US revealed complexities. Nevertheless in the end, CERN physicists became the more successful. Recognizing this, US physicists agreed to collaborate with CERN physicists. Today, there is no more political competition over accelerators between the two groups. (Edited abstract).

CERN openlab Open Day | 10 June

CERN Multimedia

2015-01-01

CERN openlab is now entering an exciting new phase and is expanding to include other public research organisations for the first time. To mark this occasion, a first-of-its-kind ‘CERN openlab Open Day’ event will be held at CERN on 10 June 2015.   CERN openlab is a unique public-private partnership between CERN and leading ICT companies. Its mission is to accelerate the development of cutting-edge solutions to be used by CERN’s scientific community. The ‘CERN openlab Open Day’ event will take place in the Main Auditorium on 10 June and will be an opportunity to learn more about the work carried out through CERN openlab to help tackle the challenges faced by the scientific community. Find out more: http://indico.cern.ch/event/381083/

Accelerators at school

International Nuclear Information System (INIS)

Anon.

1986-01-01

Latest subject covered by the CERN Accelerator School was 'Applied Geodesy of Particle Accelerators', which attracted an impressive number of outside participants to CERN for a week in April. Since the forerunners of today's particle accelerators were demonstrated over 50 years ago, the positioning of accelerator components has progressed from the laboratory bench-top to tunnels tens of kilometres long. Despite this phenomenal growth in size, sub-millimetre accuracy is still required

People and things. CERN Courier, Apr 1991, v. 31(3)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1991-04-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; In 1992 the XVth International Conference on High Energy Accelerators will be held from 20-24 July at the Congress Centrum, Hamburg, Germany. ; The 100 or so places for the CERN Accelerator School's 'Radiofrequency Engineering for Particle Accelerators' course in Oxford from 3-10 April were sold out well in advance. ; A Symposium on Quantum Physics, in memory of John Stewart Bell who died on 1 October 1990 will be held at CERN on 2-3 May.

HEPTech Academia – Industry Matching Event on Control Systems for Accelerators and Detectors

CERN Multimedia

Anastasios Charitonidis (FP/KT), on behalf of the organizing committee

2013-01-01

The HEPTech AIME (Academia – Industry Matching Event) on Controls for accelerators and detectors will take place from 2 to 3 December in Athens, Greece.   The HEPTech network invites you to Demokritos NCSR to participate in an event that aims to bring together Academia and Industry to share ideas and potential applications of Controls Technology. The event will provide an overview of current Controls Systems for large scale projects including the LHC, the CMS and ATLAS detectors, medical accelerator facilities and contributions from companies active in these fields. CERN Computer Centre. The programme will also address some of the challenges faced by future High Energy Physics projects in the controls area and provide a glimpse into the future requirements of research infrastructures such as the European Spallation Source (ESS), and the Extreme Light Infrastructure (ELI), while exploring different possible approaches to the commercialisation of controls technology. The event ...

CERN Library | Book presentation: "60 years of CERN experiments and discoveries" | 15 December

CERN Document Server

CERN Library

2015-01-01

"60 years of CERN experiments and discoveries", edited by Herwig Schopper and Luigi Di Lella.   Tuesday 15 December at 16:00 Room C (Building 61) The presentation will be followed by refreshments The book contains a description of the most important experimental results achieved at CERN during the past 60 years, from the mid-1950s to the latest discovery of the Higgs particle. It covers the results from early accelerators at CERN to the most recent results at the LHC and thus provides an excellent review of the achievements of this outstanding laboratory. It reflects not only the impressive scientific progress achieved during the past six decades but demonstrates also the special way of successful international collaboration developed at CERN. The e-book is available in Open Access here thanks to an agreement between CERN and the publisher. "60 years of CERN experiments and discoveries", ed. by Herwig Schopper and Luigi Di Lella, World Scientific, 2015, ISBN 9789...

Supervision Application for the New Power Supply of the CERN PS (POPS)

CERN Document Server

Milcent, H; Gonzalez-Berges, M; Voitier, A

2011-01-01

The power supply system for the magnets of the CERN PS has been recently upgraded to a new system called POPS (POwer for PS). The old mechanical machine has been replaced by a system based on capacitors. The equipments as well as the low level controls have been provided by an external company (CONVERTEAM). The supervision application has been developed at CERN reusing the technologies and tools used for the LHC Accelerator and Experiments (UNICOS and JCOP frameworks, SIMATIC WinCC Open Architecture SCADA tool). The paper describes the full architecture of the control application, and the challenges faced for the integration with an outsourced system. The benefits of reusing the CERN industrial control frameworks and the required adaptations will be discussed. Finally, the initial operational experience will be presented.

CERN: Producing radioactive beams

International Nuclear Information System (INIS)

Anon.

1994-01-01

Accelerating radioactive beams has long been of interest at CERN's ISOLDE on-line isotope separator - the possibility was discussed at a CERN Workshop on intermediate energy physics as early as 1977. Meanwhile, as was highlighted in the 1991 report of the Nuclear Physics European Collaboration Committee, widespread scientific interest in these beams has developed and a range of projects are proposed, under construction or operational throughout the world

CERN reacts to increased costs to completion of the LHC

CERN Multimedia

2002-01-01

Aspects of LHC construction. The CERN Council, where the representatives of the 20 Member States of the Organization decide on scientific programmes and financial resources, held its 120th session on 14 December under the chairmanship of Prof. Maurice Bourquin (CH). CERN adjusts to the LHC Director-General, Luciano Maiani, stressed that CERN was now fully engaged in the LHC and outlined the first moves to react to the increased cost to completion of the LHC. The new accelerator is an extremely complex, high-tech project which CERN is building under very severe conditions. However, the technical challenges are solved and industrial production of accelerator elements, and installation are starting. Professor Maiani said that 2001 had been a very hard but decisive year for CERN. An important milestone had been passed during this meeting with the approval of the LHC dipole magnets contract, the last major contract for the accelerator. The new costs to completion of the LHC project are now clear. A first propos...

Proposal for the Award of Two Contracts for the Technical Services for Work on Components of CERN Particle Accelerators and High Energy Physics Experiments

CERN Document Server

2003-01-01

This document concerns the award of two contracts for the technical services for work on components of CERN particle accelerators and high energy physics experiments. Following a market survey carried out among 73 firms in fourteen Member States, a call for tenders (IT-3156/SPL) was sent on 4 November 2002 to three consortia in four Member States. By the closing date, CERN had received tenders from the three consortia. The Finance Committee is invited to agree to the negotiation of two contracts with: 1) the consortium SERCO FACILITIES MANAGEMENT (NL) - GERARD PERRIER INDUSTRIE (FR) - INEO ALPES (FR), the lowest bidder, for approximately 55% of the technical services for work on components of CERN particle accelerators and high energy physics experiments, for an initial period of five years and for a total amount not exceeding 37 435 270 euros (54 902 500 Swiss francs), subject to revision for inflation from 1 January 2005. The contract will include options for two one-year extensions beyond the initial five-...

Radiography at CERN

CERN Multimedia

HSE Unit

2014-01-01

What is industrial radiography? It is a non-destructive method with a wide variety of applications, such as inspecting the quality of a weld. It uses high-energy radioactive sources or an X-ray generator.   Is this inspection technique used at CERN? Yes, it is widely used at CERN by the EN-MME Group, which outsources the work to one or more companies, depending on the workload. Is it possible to carry out radiography anywhere at CERN? Yes, it is possible to carry out radiography in any building/accelerator/experiment area at CERN (including in areas which are not normally subject to radiological hazards). When is radiography carried out? It normally takes place outside of working hours (7 p.m. to 6 a.m.). How will I know if radiography is taking place in my building? If this activity is planned in a CERN building, notices will be affixed to all of its main entrance doors at least 24 hours in advance. What are the risks? There is a risk of exposure to very high levels of radiation, dep...

Rejuvenation of the controls of the CERN PS/ISOLDE facility using industrial components

CERN Document Server

Allard, J.; Locci, F.; Mornacchi, G.

2001-01-01

In the context of the general consolidation of the CERN ISOLDE facility, a project has been started to upgrade the ISOLDE control system. We describe the new ISOLDE control system, emphasizing the systematic use of industrial components such as PLCs and field buses, their integration with the existing, VME based, CERN PS control system and their potential applicability to both existing and new controls problems at the CERN PS complex. We also discuss how to extend a PLC-based solution to the case where real-time response is an issue.

People and things. CERN Courier, Apr 1991, v. 31(3)

International Nuclear Information System (INIS)

Anon.

1991-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; In 1992 the XVth International Conference on High Energy Accelerators will be held from 20-24 July at the Congress Centrum, Hamburg, Germany. ; The 100 or so places for the CERN Accelerator School's 'Radiofrequency Engineering for Particle Accelerators' course in Oxford from 3-10 April were sold out well in advance. ; A Symposium on Quantum Physics, in memory of John Stewart Bell who died on 1 October 1990 will be held at CERN on 2-3 May

Special issue - Applying the accelerator

International Nuclear Information System (INIS)

Anon.

1995-01-01

T'he CERN Courier is the international journal of high energy physics, covering current developments in and around this branch of basic science. A recurrent theme is applying the technology developed for particle accelerators, the machines which produce beams of high energy particles for physics experiments. Twentieth-century science is full of similar examples of applications derived from pure research. This special issue of the CERN Courier is given over to one theme - the applications of accelerators. Accelerator systems and facilities are normally associated with highenergy particle physics research, the search for fundamental particles and the quest to understand the physics of the Big Bang. To the layman, accelerator technology has become synonymous with large and expensive machines, exploiting the most modern technology for basic research. In reality, the range of accelerators and their applications is much broader. A vast number of accelerators, usually much smaller and operating for specific applications, create wealth and directly benefit the population, particularly in the important areas of healthcare, energy and the environment. There are well established applications in diagnostic and therapeutic medicine for research and routine clinical treatments. Accelerators and associated technologies are widely employed by industry for manufacturing and process control. In fundamental and applied research, accelerator systems are frequently used as tools. The biennial conference on the Applications of Accelerators in Industry and Research at Denton, Texas, attracts a thousand participants. This special issue of the CERN Courier includes articles on major applications, reflecting the diversity and value of accelerator technology. Under Guest Editor Dewi Lewis of Amersham International, contributions from leading international specialists with experience of the application end of the accelerator chain describe their fields of direct interest. The

Special issue - Applying the accelerator

Energy Technology Data Exchange (ETDEWEB)

Anon.

1995-07-15

T'he CERN Courier is the international journal of high energy physics, covering current developments in and around this branch of basic science. A recurrent theme is applying the technology developed for particle accelerators, the machines which produce beams of high energy particles for physics experiments. Twentieth-century science is full of similar examples of applications derived from pure research. This special issue of the CERN Courier is given over to one theme - the applications of accelerators. Accelerator systems and facilities are normally associated with highenergy particle physics research, the search for fundamental particles and the quest to understand the physics of the Big Bang. To the layman, accelerator technology has become synonymous with large and expensive machines, exploiting the most modern technology for basic research. In reality, the range of accelerators and their applications is much broader. A vast number of accelerators, usually much smaller and operating for specific applications, create wealth and directly benefit the population, particularly in the important areas of healthcare, energy and the environment. There are well established applications in diagnostic and therapeutic medicine for research and routine clinical treatments. Accelerators and associated technologies are widely employed by industry for manufacturing and process control. In fundamental and applied research, accelerator systems are frequently used as tools. The biennial conference on the Applications of Accelerators in Industry and Research at Denton, Texas, attracts a thousand participants. This special issue of the CERN Courier includes articles on major applications, reflecting the diversity and value of accelerator technology. Under Guest Editor Dewi Lewis of Amersham International, contributions from leading international specialists with experience of the application end of the accelerator chain describe their fields of direct interest. The contributions

CERN'S TECHNICAL CONTROL ROOM (TCR) A CENTRAL SERVICE FOR EVERYONE

CERN Document Server

Mario Batz

2002-01-01

The Technical Control Room (TCR) monitors and operates the entire technical infrastructure of CERN 24 hours a day, 365 days a year. It registers and dispatches troubleshooting requests to the appropriate CERN equipment services or contractors. In addition, the TCR executes first-line interventions on the entire CERN site. Troubleshooting requests are transmitted to the TCR either via a computerised control system or via the phone number '72201'. More than 10'000 such requests are dispatched and dealt with every year. The TCR's diverse field of activity covers the following systems: electrical and fluid distribution networks, heating, cooling, ventilation, air-conditioning and gas equipment, safety and communication installations, electromechanical systems (e.g. lifts, cranes, machine tools, motorised doors), sanitary systems (leaks, sewage), control and monitoring infrastructure equipment, and buildings. These systems can either be part of the administrative infrastructure, such as offices or restaur...

The Particle Physicists’ Song : the CERN Choir in full voice in the CERN Control Centre, with writer Danuta Orlowska

CERN Multimedia

Maximilien Brice

2010-01-01

The song was submitted to CERN Courier by Danuta Orlowska, a clinical psychologist with Guy’s and St Thomas’ NHS Foundation Trust in London. It is written to be sung to the tune of The Hippopotamus Song, by Michael Flanders and Donald Swann, which will be well known to many British readers. On 3 February, members of the CERN choir gathered to give a rendition in the CERN Control Centre – the nerve centre of the LHC, which lies at the heart of the lyrics.

Radio frequency systems for present and future accelerators

International Nuclear Information System (INIS)

Raka, E.C.

1987-01-01

Rf systems are described for the FNAL Main Ring and Tevatron Ring, CERN SPS and LEP, and HERA proton acceleration system, CERN PS e + e/sup minus/ acceleration system, and CERN EPA monochromatic cavity. Low impedance rf systems in CERN ISR, the Brookhaven CBA, and SSC are also discussed

Industrial Application of Accelerators

CERN Multimedia

CERN. Geneva

2017-01-01

At CERN, we are very familiar with large, high energy particle accelerators. However, in the world outside CERN, there are more than 35000 accelerators which are used for applications ranging from treating cancer, through making better electronics to removing harmful micro-organisms from food and water. These are responsible for around $0.5T of commerce each year. Almost all are less than 20 MeV and most use accelerator types that are somewhat different from what is at CERN. These lectures will describe some of the most common applications, some of the newer applications in development and the accelerator technology used for them. It will also show examples of where technology developed for particle physics is now being studied for these applications. Rob Edgecock is a Professor of Accelerator Science, with a particular interest in the medical applications of accelerators. He works jointly for the STFC Rutherford Appleton Laboratory and the International Institute for Accelerator Applications at the Univer...

Industrial Application of Accelerators

CERN Multimedia

CERN. Geneva

2017-01-01

At CERN, we are very familiar with large, high energy particle accelerators. However, in the world outside CERN, there are more than 35000 accelerators which are used for applications ranging from treating cancer, through making better electronics to removing harmful micro-organisms from food and water. These are responsible for around $0.5T of commerce each year. Almost all are less than 20 MeV and most use accelerator types that are somewhat different from what is at CERN. These lectures will describe some of the most common applications, some of the newer applications in development and the accelerator technology used for them. It will also show examples of where technology developed for particle physics is now being studied for these applications. Rob Edgecock is a Professor of Accelerator Science, with a particular interest in the medical applications of accelerators. He works jointly for the STFC Rutherford Appleton Laboratory and the International Institute for Accelerator Applications at the Uni...

DESY greets CERN

CERN Multimedia

Helmut Dosch, Chairman of the DESY Board of Directors, continues the series of occasional exchanges between CERN and other laboratories world-wide. As part of this exchange, CERN Director-General Rolf Heuer wrote a message in DESY inForm. Helmut Dosch took over from Albrecht Wagner in March 2009. You may think that the connections between CERN and DESY are obvious – particle physics labs with record-breaking accelerators and users from all around the world trying to solve mankind’s great mysteries. We even exchanged a few Directors. But did you know that there are similarities that are much closer to home – for example that both labs have names for their staff in the host language that are untranslatable into English? You are CERNoises and CERNois, we are DESYanerinnen and DESYaner. And in the end it’s the people it all comes down to. We at DESY admire the resourcefulness, enthusiasm, dedication and perseverance with which you at CERN have designed, built, started ...

Asia honours accelerator physicists

CERN Multimedia

2010-01-01

"Steve Meyers of Cern and Jie Wei of Beijing's Tsinghua University are the first recipients of a new prize for particle physics. The pair were honoured for their contributions to numerous particle-accelerator projects - including Cern's Large Hadron Collider - by the Asian Committee for Future Accelerators (ACFA)..." (1 paragraph)

CERN safety system monitoring - SSM

International Nuclear Information System (INIS)

Hakulinen, T.; Ninin, P.; Valentini, F.; Gonzalez, J.; Salatko-Petryszcze, C.

2012-01-01

CERN SSM (Safety System Monitoring) is a system for monitoring state-of-health of the various access and safety systems of the CERN site and accelerator infrastructure. The emphasis of SSM is on the needs of maintenance and system operation with the aim of providing an independent and reliable verification path of the basic operational parameters of each system. Included are all network-connected devices, such as PLCs (local purpose control unit), servers, panel displays, operator posts, etc. The basic monitoring engine of SSM is a freely available system-monitoring framework Zabbix, on top of which a simplified traffic-light-type web-interface has been built. The web-interface of SSM is designed to be ultra-light to facilitate access from hand-held devices over slow connections. The underlying Zabbix system offers history and notification mechanisms typical of advanced monitoring systems. (authors)

Cern faces 260m euro budget cuts

CERN Multimedia

Banks, Michael

2010-01-01

"The Cern particle-physics lab near Geneva is to slash about 260m euro ($340m) from its budget for 2011-2015. The cut, which was approved by Cern's council last month, will require the lab to scale back research into future particles accelerators" (0.5 page)

A review of accelerator and particle physics at the CERN intersecting storage rings

International Nuclear Information System (INIS)

Jacob, M.; Johnsen, K.

1984-01-01

The last meeting of the CERN Intersecting Storage Rings Committee (ISRC) was held on 27 January 1984, following the closing of the ISR for colliding-beam physics in December 1983. This report consists of the written versions of the two review talks presented at that meeting. K. Johnsen describes the history and importance of the ISR for accelerator physics, from the first ideas on colliding-beam devices to the final operation. M. Jacob gives his view of the role of the ISR physics programme in the development of particle physics up to and including the latest available results. The preface is by G. Bellettini, the last chairman of the ISR Committee. (orig.)

Awakening the potential of plasma acceleration

CERN Multimedia

Katarina Anthony

2014-01-01

Civil engineering has begun for the new AWAKE experiment, which looks to push the boundaries of particle acceleration. This proof-of-principle experiment will harness the power of wakefields generated by proton beams in plasma cells, producing accelerator gradients hundreds of times higher than those used in current RF cavities.   Civil engineering works are currently ongoing at the AWAKE facility. As one of CERN's accelerator R&D experiments, the AWAKE project is rather unique. Like all of CERN's experiments, AWAKE is a collaborative endeavour with institutes and organisations participating around the world. "But unlike fixed-target experiments, where the users take over once CERN has delivered the facility, in AWAKE, the synchronised proton, electron and laser beams provided by CERN are an integral part of the experiment," explains Edda Gschwendtner, CERN AWAKE project leader. "So, of course, CERN's involvement in the project goes well...

Digital acceleration: from CERN to my startup and beyond

CERN Multimedia

CERN. Geneva

2017-01-01

This seminar is organised in collaboration with CERN openlab. Our society has entered a disruption era, undertaking several consecutive digital transformations which will have an impact comparable to the industrial revolution. In order to keep up with the pace of innovation, it is necessary for society to digitally transform and thus embrace base technologies such as big data, deep learning and blockchain. From a real life example, this talk will analyse the journey made from CERN technology to a startup and conclude with ongoing innovative developments in a large French group specialised in digital trust, looking to address digital transformation. Find out more about David here: https://www.linkedin.com/in/manset Please join us for coffee at 10.30 Registration is only compulsory if you do not have a CERN access card.  

Commissioning of the helium cryogenic system for the HIE- ISOLDE accelerator upgrade at CERN

CERN Document Server

Delruelle, N; Leclercq, Y; Pirotte, O; Williams, L

2015-01-01

The High Intensity and Energy ISOLDE (HIE-ISOLDE) project is a major upgrade of the existing ISOLDE and REX-ISOLDE facilities at CERN. The most significant improvement will come from replacing the existing REX accelerating structure by a superconducting linear accelerator (SC linac) composed ultimately of six cryo-modules installed in series, each containing superconducting RF cavities and solenoids operated at 4.5 K. In order to provide the cooling capacity at all temperature levels between 300 K and 4.5 K for the six cryo-modules, an existing helium refrigerator, manufactured in 1986 and previously used to cool the ALEPH magnet during LEP operation from 1989 to 2000, has been refurbished, reinstalled and recommissioned in a dedicated building located next to the HIE-ISOLDE experimental hall. This helium refrigerator has been connected to a new cryogenic distribution line, consisting of a 30-meter long vacuum-insulated transfer line, a 2000-liter storage dewar and six interconnecting valve boxes, one for eac...

CERN and Portugal

International Nuclear Information System (INIS)

Anon.

1995-01-01

In its continual tour of CERN Member States, the European Committee for Future Accelerators (ECFA) visited Lisbon, Portugal, on 21-22 April, where it met at the Instituto Superiore Tecnico, a technical university with 9,000 students. Portuguese particle physics is in a particularly healthy situation, having developed considerably following Portugal's admission to CERN in 1985. With support from Brussels, scientific infrastructure has developed rapidly, although the science base has yet to attain the levels seen in larger nations. The 45-strong population of experimentalists in Portugal, including 14 PhDs, represents a 2.5-fold increase since Portugal joined CERN ten years ago and is in line with the goal stated at the time. This successful development of experimental particle physics has benefited much from physicists returning from abroad (mainly France and the UK). The direct result of the efforts of a few individuals (notably J.M. Gago), this splendid achievement provides an excellent role model for new and potential CERN Member States. At present, particle physics represents some 3 0% of all Portuguese physics publications. This very special role (and the financial support it implies) provides a visible target, but one which can be defended as it provides a catalyst for other national scientific developments. The national hub is the Laboratory for experimental high energy physics and related R&D projects (LIP), with centres in Lisbon (Head, J.M. Gago) and Coimbra (Head, A. Policarpo). LIP, with close links to two universities in Lisbon and to the University of Coimbra, has developed into a centre of expertise and training in electronics, computing and software engineering. Present LIP funding is some 2 million Swiss francs/year (70% in Lisbon and 3 0% in Coimbra), covering most of the salaries of the nonuniversity people, the remainder being supported by grants from Portuguese and European programmes. Portugal's contribution to CERN's 1995 budget

Accelerators Spanish steps

International Nuclear Information System (INIS)

Anon.

1988-01-01

In September, the CERN Accelerator School (CAS) held its third General Accelerator Physics Course, the venue this time being Salamanca, the oldest university in Spain. Spain, which rejoined CERN in 1982, now has a vigorous and steadily growing high energy physics community making substantial contributions to physics detector development and successfully involving Spanish industry. However the embryonic accelerator community cannot yet generate an equivalent level of activity, and this important channel for introducing new high technology into industry has yet to be fully exploited

People and things. CERN Courier, Oct 1988, v. 28(8)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1988-10-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. With $11 million in pre-construction funds for the proposed KAON Factory, a major reorganization took place at the Canadian TRIUMF laboratory in Vancouver on September 1. A EULIMA (European Light Ion Medical Accelerator) workshop on the potential value of light ion beam therapy will be held at the Centre Anthoine-Lacassagne, Nice, France, from 3-5 November. As a tribute to Viktor Weisskopf on his 80th birthday, an international colloquium 'Science, Culture and Peace' was organized by CERN and by the 'Ettore Majorana' Centre for Scientific Culture, Erice, Sicily, at CERN on 19 and 20 September. An advanced accelerator physics course, organized jointly by the CERN Accelerator School and Uppsala University, Sweden, and placing special emphasis on the problems of small rings, will be held from 18-29 September in Uppsala.

People and things. CERN Courier, Oct 1988, v. 28(8)

International Nuclear Information System (INIS)

Anon.

1988-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. With $11 million in pre-construction funds for the proposed KAON Factory, a major reorganization took place at the Canadian TRIUMF laboratory in Vancouver on September 1. A EULIMA (European Light Ion Medical Accelerator) workshop on the potential value of light ion beam therapy will be held at the Centre Anthoine-Lacassagne, Nice, France, from 3-5 November. As a tribute to Viktor Weisskopf on his 80th birthday, an international colloquium 'Science, Culture and Peace' was organized by CERN and by the 'Ettore Majorana' Centre for Scientific Culture, Erice, Sicily, at CERN on 19 and 20 September. An advanced accelerator physics course, organized jointly by the CERN Accelerator School and Uppsala University, Sweden, and placing special emphasis on the problems of small rings, will be held from 18-29 September in Uppsala

Assessment of individual doses and intervention planning at CERN

International Nuclear Information System (INIS)

Brugger, M.; Forkel-Wirth, D.; Gaborit, J.C.; Menzel, H.; Roesler, S.

2006-01-01

Founded in 1954, CERN is the European Organization for Nuclear Research, one of the world's largest international particle physics centres. It sits astride the Franco-Swiss border near Geneva. The Large Hadron Collider (LHC) is currently being installed in a 27-kilometer ring tunnel, buried deep below the countryside on the outskirts of Geneva, Switzerland and the Pays de Gex, France. When its operation begins in 2007, the LHC will be the world's most power particle accelerator. The start-up and the operation of the LHC will mark a new era for CERN's operational radiation protection. The total surface of CERN's radiation areas will enlarge significantly and a large number of work places have to be regularly monitored by CERN's radiation protection group. The maintenance personnel will comprise CERN staff, outside contractors and a large number of physicists from all over the world. CERN meets this challenge by applying optimisation processes already in the design of accelerator and detector components and by an appropriate intervention and dose planning during operation. Detailed Monte Carlo calculations were performed during the design phase of the LHC and were used to identify the potential radiation hazards during future maintenance in areas with elevated beam losses (accelerator ejection and injection, beam dumps, target areas or beam cleaning insertions) and thus elevated dose rates. In an iterative way, the design of the accelerator components and the layout of these regions were optimised. The impact of the proposed modifications on the dose to personnel was evaluated by Monte Carlo simulations. Calculated individual and collective doses were then compared to design constraints. (author)

Assessment of Individual Doses and Intervention Planning at CERN

International Nuclear Information System (INIS)

Brugger, M.; Forkel-Wirth, D.; Gaborit, J.C.; Menzel, H.; Roesler, S.; Vincke, H.

2006-01-01

Founded in 1954, CERN is the European Organization for Nuclear Research, one of the world's largest international particle physics centres. It sits astride the Franco-Swiss border near Geneva. The Large Hadron Collider (Lhc) is currently being installed in a 27-kilometer ring tunnel, buried deep below the countryside on the outskirts of Geneva, Switzerland and the Pays de Gex, France. When its operation begins in 2007, the Lhc will be the world's most powerful particle accelerator. The start-up and the operation of the Lhc will mark a new era for CERN's operational radiation protection. The total surface of CERN's radiation areas will enlarge significantly and a large number of work places have to be regularly monitored by CERN's radiation protection group. The maintenance personnel will comprise CERN staff, outside contractors and a large number of physicists from all over the world. CERN meets this challenge by applying optimisation processes already in the design of accelerator and detector components and by an appropriate intervention and dose planning during operation. Detailed Monte Carlo calculations were performed during the design phase of the Lhc and were used to identify the potential radiation hazards during future maintenance in areas with elevated beam losses (accelerator ejection and injection, beam dumps, target areas or beam cleaning insertions) and thus elevated dose rates. In an iterative way, the design of the accelerator components and the layout of these regions were optimised. The impact of the proposed modifications on the dose to personnel was evaluated by Monte Carlo simulations. Calculated individual and collective doses were then compared to design constraints. (authors)

CERN Library | Herwig Schopper and Luigi Di Lella present "60 Years of CERN Experiments and Discoveries" | 10 March

CERN Document Server

CERN Library

2016-01-01

"60 Years of CERN Experiments and Discoveries" edited by Herwig Schopper and Luigi Di Lella. Presentation on Thursday, 10 March at 4 p.m. in Room C The book is a compilation of the most important experimental results achieved during the past 60 years at CERN - from the mid-1950s to the recent discovery of the Higgs particle. It covers the results from the early accelerators at CERN to those at the LHC and provides an excellent review of CERN's achievements. Not only presented is the impressive scientific progress achieved during the past six decades presented, but also is demonstrated the special way in which successful international collaboration exists at CERN. The book has been reviewed in the January-February issue of the CERN Courier: see here. Thanks to an agreement between CERN and the publisher, the e-book is available online Open Access. 60 Years of CERN Experiments and Discoveries Edited by Herwig Schopper and Luigi Di Lella W...

People and things. CERN Courier, Apr 1990, v. 30(3)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1990-04-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; In a January 31 test at the Continuous Electron Beam Accelerator Facility (CEBAF) under construction at Newport News, Virginia, a beam from the injector's 500 keV room temperature section was accelerated to 2.5 MeV in one cavity of the quarter-cryomodule containing the injector's initial superconducting accelerating cavity pair. ; To explore in detail and update the physics possibilities for the Large Hadron Collider (LHC) project at CERN, the European Committee for Future Accelerators (ECFA) is now preparing for an LHC Workshop to be held in Aachen from 5-10 October. ; The 1990 CERN School of Computing, organized in collaboration with the Inter-University Institute for High Energies, VUB-ULB, Brussels, will take place from 2-15 September at Nieuwpoort, Belgium. ; To reinforce the increased spirit of cooperation resulting from CERN's growing attraction for scientists from all over Europe and from further afield, the Laboratory embarked last year on a programme of drawing up bilateral agreements to put ongoing collaboration on a firmer footing.

People and things. CERN Courier, Apr 1990, v. 30(3)

International Nuclear Information System (INIS)

Anon.

1990-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; In a January 31 test at the Continuous Electron Beam Accelerator Facility (CEBAF) under construction at Newport News, Virginia, a beam from the injector's 500 keV room temperature section was accelerated to 2.5 MeV in one cavity of the quarter-cryomodule containing the injector's initial superconducting accelerating cavity pair. ; To explore in detail and update the physics possibilities for the Large Hadron Collider (LHC) project at CERN, the European Committee for Future Accelerators (ECFA) is now preparing for an LHC Workshop to be held in Aachen from 5-10 October. ; The 1990 CERN School of Computing, organized in collaboration with the Inter-University Institute for High Energies, VUB-ULB, Brussels, will take place from 2-15 September at Nieuwpoort, Belgium. ; To reinforce the increased spirit of cooperation resulting from CERN's growing attraction for scientists from all over Europe and from further afield, the Laboratory embarked last year on a programme of drawing up bilateral agreements to put ongoing collaboration on a firmer footing

People and things. CERN Courier, Jul-Aug 1985, v. 25(6)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1985-06-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. Under the chairmanship of Carlo Rubbia, a 'Working Group on the Scientific and Technological Longterm Future of CERN' has been set up 'to explore various options for the long-term future of CERN. ATLAS, short for Argonne Tandem Linear Accelerator System and the world's first superconducting heavy ion accelerator, was dedicated at the US Argonne National Laboratory on 3 June.

The Control System of CERN Accelerators Vacuum (LS1 Activities and New Developments)

CERN Document Server

Gomes, P; Bellorini, F; Blanchard, S; Boivin, J P; Gama, J; Girardot, G; Pigny, G; Rio, B; Vestergard, H; Kopylov, L; Merker, S; Mikheev, M

2014-01-01

After 3 years of operation, the LHC entered its first Long Shutdown period (LS1), in February 2013 [1]. Major consolidation and maintenance works are being performed across the whole CERN’s Accelerator chain, in order to prepare the LHC to restart at higher energy, in 2015. The injector chain shall resume earlier, in mid-14. We report about the on-going vacuum-controls projects. Some of them concern the renovation of the controls of certain machines; others are associated with the consolidations of the vacuum systems of LHC and its injectors; and a few are completely new installations. ue to the wide age-span of the existing vacuum installations, there is a mix of design philosophies and of control-equipment generations. The renovations and the novel projects offer an opportunity to improve the uniformity and efficiency of vacuum controls by: reducing the number of equipment versions with similar functionality; identifying, naming, labelling, and documenting all pieces of equipment; homogenizing the contr...

People and things. CERN Courier, May 1989, v. 29(4)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1989-05-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. CERN's Accelerator School and Uppsala University, Sweden, are jointly organizing a course on Advanced Accelerator Physics, to be held in Uppsala from 18-29 September, Students should have a basic knowledge of accelerators, and the course is designed to highlight the problems of small rings.The new World Laboratory headquarters in Lausanne, Switzerland, were formally opened on 7 March.

People and things. CERN Courier, May 1989, v. 29(4)

International Nuclear Information System (INIS)

Anon.

1989-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. CERN's Accelerator School and Uppsala University, Sweden, are jointly organizing a course on Advanced Accelerator Physics, to be held in Uppsala from 18-29 September, Students should have a basic knowledge of accelerators, and the course is designed to highlight the problems of small rings.The new World Laboratory headquarters in Lausanne, Switzerland, were formally opened on 7 March

People and things. CERN Courier, Dec 1985, v. 25(10)

International Nuclear Information System (INIS)

Anon.

1985-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The CERN Accelerator School is organizing a course 'Applied Geodesy for Particle Accelerators' from 14-18 April, at CERN. An international workshop on the quark-gluon plasma and re/ativistic nuclear collisipns will be held in Kiev (USSR) from 19-24 May, organized by the Ukrainian Academy of Science. Neutrino 86, the 12th International Conference on Neutrino Physics and Astrophysics, will be held in Sen dai, Japan, from 3-8 June

People and things. CERN Courier, Dec 1985, v. 25(10)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1985-12-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The CERN Accelerator School is organizing a course 'Applied Geodesy for Particle Accelerators' from 14-18 April, at CERN. An international workshop on the quark-gluon plasma and re/ativistic nuclear collisipns will be held in Kiev (USSR) from 19-24 May, organized by the Ukrainian Academy of Science. Neutrino 86, the 12th International Conference on Neutrino Physics and Astrophysics, will be held in Sen dai, Japan, from 3-8 June.

Le Japon contribue au grand collisionneur de hadrons du CERN

CERN Multimedia

CERN Press Office. Geneva

1995-01-01

Japan's Ministry of Education, Science and Culture (Monbusho), announced on May 10 that it would help to finance the construction of CERN*'s next particle accelerator, the Large Hadron Collider (LHC). This announcement follows the visit of a CERN delegation, led by Director-General Prof. Christopher Llewellyn Smith to Japan in March 1995.

Safety in an international work environment: CERN

CERN Document Server

Potter, K.

1990-01-01

The European Laboratory for Particle Physics (CERN) has recently completed a new accelerator. The installation of this accelerator and its experimental areas represents an example of harmonization of safety rules in supranational areas, as CERN is an international organization and the machine is housed in a tunnel of 26.7 km circumference, of which 20 km is on French territory and 6.7 km on Swiss territory. The work was carried out by a large number of firms from all over Europe, CERN staff and physicists and technicians from all over the world, and represented almost 4 million working hours. The safety organization chosen and applied with the agreement of the two host-State safety authorities is described and the resulting application, including the results in terms of accident statistics, from the installation of the machine, experimental areas and detectors are presented.

New Control Structure of the 10 MHz RF System in the CERN PS

CERN Document Server

Damerau, H

2013-01-01

The 10MHz cavities comprise the main RF system in the CERN PS and the only one that allows acceleration. In total 11 tunable cavities (10 operational and a hot spare, grouped into 3+1 tuning groups and up to presently 6 voltage program groups) are distributed all around the circumference of the PS ring. Next to the RF drive signal each of the cavities is controlled by a voltage program and timing pulses to open and close the relays to short-circuit the cavity gaps. These control signals are presently generated by a dedicated hardware matrix. It translates voltage functions and relay timing pulses per cavity group into functions and timings per cavity. However, due to its central position in the RF beam control system, the dedicated hardware matrix can cause significant downtime in case of a major hardware failure. Instead of upgrading the existing obsolete hardware, this note suggests a replacement by standard controls hardware and dedicated application software. Thanks to advanced software concepts like “M...

People and things. CERN Courier, Jul-Aug 1985, v. 25(6)

International Nuclear Information System (INIS)

Anon.

1985-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. Under the chairmanship of Carlo Rubbia, a 'Working Group on the Scientific and Technological Longterm Future of CERN' has been set up 'to explore various options for the long-term future of CERN. ATLAS, short for Argonne Tandem Linear Accelerator System and the world's first superconducting heavy ion accelerator, was dedicated at the US Argonne National Laboratory on 3 June

CERN pp-bar project

International Nuclear Information System (INIS)

Billinge, R.

1987-01-01

The recent epoch-making scientific discoveries at CERN of the intermediate vector bosons marked the culmination of what could perhaps be described as the most challenging and exciting adventure in the field of accelerator physics. The success of this daring enterprise required the utmost in the physics and engineering of accelerators and levels of reliability reminiscent of the Apollo space program. In what follows, I hope to be able to at least whet your appetites for what may well prove to be the beginning of a new era in High Energy Particle Accelerators

Indian President visits CERN

CERN Multimedia

Katarina Anthony

2011-01-01

On 1 October, her Excellency Mrs Pratibha Devisingh Patil, President of India, picked CERN as the first stop on her official state visit to Switzerland. Accompanied by a host of Indian journalists, a security team, and a group of presidential delegates, the president left quite an impression when she visited CERN’s Point 2!   Upon arrival, Pratibha Patil was greeted by CERN Director General Rolf Heuer, as well as senior Indian scientists working at CERN, and various department directors. After a quick overview of the Organization, Rolf Heuer and the President addressed India’s future collaboration with CERN. India is currently an Observer State of the Organization, and is considering becoming an Associate Member State. A short stop in LHC operations gave Steve Myers and the Accelerator team the opportunity to take the President on a tour through the LHC tunnel. From there, ALICE’s Tapan Nayak and Spokesperson Paolo Giubellino took Pratibha Patil to the experiment&am...

Workshop on Electron-Cloud Simulations for Proton and Positron Beams (ECLOUD'02) organized by the SL Accelerator Physics Group at CERN.

CERN Multimedia

Patrice Loïez

2002-01-01

This workshop was organized by the SL Accelerator Physics group at CERN from 15 to 18 April 2002. More than 60 participants from 17 institutes reflect the great worldwide interest in the electron-cloud phenomenon, which presently limits the performance of several storage rings and has become a concern for the LHC.

Dynamics and tolerances for the CERN interdigital H LINAC

International Nuclear Information System (INIS)

Valero, S.; Ratzinger, U.

1992-01-01

A three tank interdigital H structure has been chosen for the 0.25 to 4.2 MeV/u part of the CERN heavy-ion injector linac. The complete design has been developed by GSI, in particular the longitudinal dimensions have been determined and multi-particle studies have been made using the program LORAS. Some RF tolerance studies have also be made at CERN using this program. For more general approach to the dynamics, the program DYNAC is being used at CERN especially where statistical analyses are essential i.e for determining emittance growth, tolerances on accelerator parameters and alignment. The approaches and results of these two programs are compared for this novel type of accelerator

People and things. CERN Courier, Dec 1984, v. 24(10)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1984-12-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. With the primary goal of exploiting the new Tevatron facilities for physics, Fermilab Director Leon Lederman has announced a management reshuffle, effective from 1 October. The first 550 MeV proton bunches have been successfully extracted from the new Spallation Neutron Source at the Rutherford Appleton Laboratory, UK, at the first attempt.Lee Teng of Fermilab has been appointed Director of Taiwan's recently founded $30 million Synchrotron Radiation Research Centre, the island's first major large scale research project. A Protocol on cooperation between CERN and the Chinese Academy of Sciences was signed at CERN on 18 October by Zhao Guangzhao, a Vice-President of the Academy, and CERN Director General Herwig Schopper. The next Particle Accelerator Conference will be held in Vancouver, Canada, from 13-16 May 1985, organized by the TRIUMF Laboratory. Following the 1983 Santa Fe Conference, it will be the 11th in this biennial series devoted to all aspects of accelerator science, engineering and technology. From 3-14 September, the CERN Accelerator School organized (jointly with the Laboratoire de l'Accélérateur Linéaire, Orsay and the Laboratoire National Saturne, Saclay) a course on General Accelerator Physics at the Ecole Supérieure d'Electricité, Gif-sur-Yvette.

People and things. CERN Courier, Dec 1984, v. 24(10)

International Nuclear Information System (INIS)

Anon.

1984-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. With the primary goal of exploiting the new Tevatron facilities for physics, Fermilab Director Leon Lederman has announced a management reshuffle, effective from 1 October. The first 550 MeV proton bunches have been successfully extracted from the new Spallation Neutron Source at the Rutherford Appleton Laboratory, UK, at the first attempt.Lee Teng of Fermilab has been appointed Director of Taiwan's recently founded $30 million Synchrotron Radiation Research Centre, the island's first major large scale research project. A Protocol on cooperation between CERN and the Chinese Academy of Sciences was signed at CERN on 18 October by Zhao Guangzhao, a Vice-President of the Academy, and CERN Director General Herwig Schopper. The next Particle Accelerator Conference will be held in Vancouver, Canada, from 13-16 May 1985, organized by the TRIUMF Laboratory. Following the 1983 Santa Fe Conference, it will be the 11th in this biennial series devoted to all aspects of accelerator science, engineering and technology. From 3-14 September, the CERN Accelerator School organized (jointly with the Laboratoire de l'Accélérateur Linéaire, Orsay and the Laboratoire National Saturne, Saclay) a course on General Accelerator Physics at the Ecole Supérieure d'Electricité, Gif-sur-Yvette

Proposal to Negotiate, without Competitive Tendering, a Blanket Order for High-Voltage Thyratrons for the CERN Accelerators

CERN Document Server

2002-01-01

This document concerns the supply of thyratrons to be used as high-voltage and high-current switches for the fast-pulsed magnet systems of the CERN accelerators and for the protection of the klystrons of RF systems. Following a market survey (MS-3136/SL/LHC) carried out among 18 firms in ten Member States, CERN entered into negotiations with one firm in one Member State. The Finance Committee is invited to agree to the negotiation, without competitive tendering, of a new blanket order with E2V TECHNOLOGIES (GB) for up to 800 000 pounds sterling to cover the supply of thyratrons for the years 2003, 2004 and 2005, subject to price revision for inflation for deliveries after 31 December 2003. At the present rate of exchange, this amount is equivalent to 1 855 000 Swiss francs. The firm has indicated the following distribution by country of the order value covered by this adjudication proposal: GB - 100%.

Assembly and RF Tuning of the Linac4 RFQ at CERN

CERN Document Server

Rossi, C; Hansen, J; Lallement, JB; Lombardi, AM; Pugnat, D; Vandoni, G; Timmins, M; Vretenar, M; Mathot, S; Piquet, O; Novo, J; Le Noa, Y; France, A; Desmons, M

2013-01-01

The fabrication of Linac4 is progressing at CERN with the goal of making a 160 MeV H- beam available to the LHC injection chain as from 2015. In the Linac4 the first stage of beam acceleration, after its extraction from the ion source, is provided by a Radiofrequency Quadrupole accelerator (RFQ), operating at the RF frequency of 352.2 MHz and which accelerates the ion beam to the energy of 3 MeV. The RFQ, made of three modules, one meter each, is of the four-vane kind, has been designed in the frame of a collaboration between CERN and CEA and has been completely machined and assembled at CERN. The paper describes the assembly of the RFQ structure and reports the results of RF low power measurements, in order to achieve the required accelerating field flatness within 1% of the nominal field profile.

John Adams and CERN: Personal Recollections

CERN Document Server

Brianti, Giorgio

2013-01-01

By any standards, John Adams had a most remarkable career. He was involved in three important, emerging technologies, radar, particle accelerators and controlled fusion, and had an outstanding impact on the last two. Without a university education, he attained hierarchical positions of the highest level in prestigious national and international organizations. This article covers the CERN part of his career, by offering some personal insights into the different facets of his contributions to major accelerator projects, from the first strong-focusing synchrotron, the PS, to the SPS and its conversion to a proton–antiproton collider. In particular, it outlines his abilities as a leader of an international collaboration, which has served as an example for international initiatives in other disciplines.

ACFA and IPAC announce accelerator prizes

CERN Multimedia

CERN Bulletin

2010-01-01

Steve Myers, CERN's Director for Accelerators and Technology. The Asian Committee for Future Accelerators (ACFA) has joined forces with the first International Particle Accelerator Conference, IPAC’10, to award prizes for outstanding work in the field of accelerators. The conference replaces the regional conferences of the Americas, Europe and Asia and will be hosted by the three regions on a rotational basis (see CERN Courier). The ACFA/IPAC’10 Prizes Selection Committee, chaired by Won Namkung of Pohang Accelerator Laboratory, decided on the prizes and the names of the winners at a meeting on 20 January. The awards will be made during IPAC’10, which will be held in Kyoto on 23-28 May. Jie Wei. (Courtesy Tsinghua University.) Steve Myers, Director for Accelerators and Technology at CERN, receives an Achievement Prize for Outstanding Work in the Accelerator Field with no Age Limit “for his numerous outstanding contributions to the design, construction, commissio...

CERN tests reveal security flaws with industrial network devices

CERN Document Server

Lüders, Stefan

2006-01-01

The CERN high energy particle physics facility at Geneva, Switzerland will incorporate a wide range of COTS industrial control systems within its next generation particle collider, the LHC. In particular, the Internet will be used to facilitate the remote access for accelerator and particle physicists and system experts based at several hundred locations around the globe. The integration of Industrial Ethernet and COTS PLCs within the LHC program focuses extreme attention on the industrial network cyber-security requirement. CERN's response has been to conduct operational research on the security resilience of networked industrial devices. As test team lead Stefan Lüders reports here, industrial networked devices put through the organisation's test procedures have generally shown up unexpected vulnerabilities.

Accelerating Inspire

CERN Document Server

AUTHOR|(CDS)2266999

2017-01-01

CERN has been involved in the dissemination of scientific results since its early days and has continuously updated the distribution channels. Currently, Inspire hosts catalogues of articles, authors, institutions, conferences, jobs, experiments, journals and more. Successful orientation among this amount of data requires comprehensive linking between the content. Inspire has lacked a system for linking experiments and articles together based on which accelerator they were conducted at. The purpose of this project has been to create such a system. Records for 156 accelerators were created and all 2913 experiments on Inspire were given corresponding MARC tags. Records of 18404 accelerator physics related bibliographic entries were also tagged with corresponding accelerator tags. Finally, as a part of the endeavour to broaden CERN's presence on Wikipedia, existing Wikipedia articles of accelerators were updated with short descriptions and links to Inspire. In total, 86 Wikipedia articles were updated. This repo...

Three years of digital photogrammetry at CERN

International Nuclear Information System (INIS)

Gayde, J.Ch.; Lasseur, Ch.

1999-01-01

The LHC (Large Hadron Collider) is the new particle accelerator project at CERN (European Laboratory for Particle Physics) in Geneva. It will be a 27 km long accelerator made of superconducting magnets. Four big physics detectors: ALICE, ATLAS, CMS, LHC-B, will be installed at four points around it. With this project, new survey requirements appear together with new spatial and time scale constraints. In order to respond to the demand, the CERN Positioning Metrology Group decided to expand its tool box by buying digital photogrammetric equipment three years ago. Basically this equipment consist of Kodak DCS460 cameras and of the Rollei-CDW (Close-range Digital Workstation) software. This system has been used quite extensively since its purchase. The next chapters illustrate the reasons for the choice of the digital photogrammetry tool at CERN and the evolution of its use. Some adapted tooling is also described below. (authors)

CERN'S TECHNICAL CONTROL ROOM (TCR) A CENTRALSERVICE FOR EVERYONE

CERN Multimedia

Mario Batz / TCR Responsible

2001-01-01

The Technical Control Room (TCR) monitors and operates the entire technical infrastructure of CERN 24 hours a day, 365 days a year. It registers and dispatches troubleshooting requests to the appropriate equipment services. In addition, the TCR executes first-line interventions on the entire CERN site. Troubleshooting requests are transmitted to the TCR either via a computerised control system or via the phone number '72201'. More than 10'000 such requests are dispatched and dealt with every year. The TCR's diverse field of activity concerns the following systems: electrical and fluid distribution networks, heating, cooling, ventilation, air-conditioning and gas equipment, safety and communication installations, electromechanical systems (e.g. lifts, cranes, machine tools, motorised doors), sanitary systems (leaks, sewage), control and monitoring infrastructure equipment, buildings. These systems can either be part of the administrative infrastructure, such as offices or restaurants, or part of the t...

The Detector Control System of the ATLAS experiment at CERN An application to the calibration of the modules of the Tile Hadron Calorimeter

CERN Document Server

Varelá-Rodriguez, F

2002-01-01

The principle subject of this thesis work is the design and development of the Detector Control System (DCS) of the ATLAS experiment at CERN. The DCS must ensure the coherent and safe operation of the detector and handle the communication with external systems, like the LHC accelerator and CERN services. A bidirectional data flow between the Data AcQuisition (DAQ) system and the DCS will enable coherent operation of the experiment. The LHC experiments represent new challenges for the design of the control system. The extremely high complexity of the project forces the design of different components of the detector and related systems to be performed well ahead to their use. The long lifetime of the LHC experiments imposes the use of evolving technologies and modular design. The overall dimensions of the detector and the high number of I/O channels call for a control system with processing power distributed all over the facilities of the experiment while keeping a low cost. The environmental conditions require...

Optical fibres in the radiation environment of CERN

Science.gov (United States)

Guillermain, E.

2017-11-01

CERN, the European Organization for Nuclear Research (in Geneva, Switzerland), is home to a complex scientific instrument: the 27-kilometre Large Hadron Collider (LHC) collides beams of high-energy particles at close to the speed of light. Optical fibres are widely used at CERN, both in surface areas (e.g. for inter-building IT networks) and in the accelerator complex underground (e.g. for cryogenics, vacuum, safety systems). Optical fibres in the accelerator are exposed to mixed radiation fields (mainly composed of protons, pions, neutrons and other hadrons, gamma rays and electrons), with dose rates depending on the particular installation zone, and with radiation levels often significantly higher than those encountered in space. In the LHC and its injector chain radiation levels range from relatively low annual doses of a few Gy up to hundreds of kGy. Optical fibres suffer from Radiation Induced Attenuation (RIA, expressed in dB per unit length) that affect light transmission and which depends on the irradiation conditions (e.g. dose rate, total dose, temperature). In the CERN accelerator complex, the failure of an optical link can affect the proper functionality of control or monitoring systems and induce the interruption of the accelerator operation. The qualification of optical fibres for installation in critical radiation areas is therefore crucial. Thus, all optical fibre types installed in radiation areas at CERN are subject to laboratory irradiation tests, in order to evaluate their RIA at different total dose and dose rates. This allows the selection of the appropriate optical fibre type (conventional or radiation resistant) compliant with the requirements of each installation. Irradiation tests are performed in collaboration with Fraunhofer INT (irradiation facilities and expert team in Euskirchen, Germany). Conventional off-the-shelf optical fibres can be installed for optical links exposed to low radiation levels (i.e. annual dose typically below few

60 years of CERN experiments and discoveries

CERN Document Server

Di Lella, Luigi

2015-01-01

The book contains a description of the most important experimental results achieved at CERN during the past 60 years, from the mid-1950s to the latest discovery of the Higgs particle. It covers the results from early accelerators at CERN to the most recent results at the LHC and thus provides an excellent review of the achievements of this outstanding laboratory. It reflects not only the impressive scientific progress achieved during the past six decades but demonstrates also the special way of successful international collaboration developed at CERN.

Satellite photo of CERN

CERN Multimedia

1991-01-01

This photo from the Landsat5 orbital telescope shows the locations of CERN's Meyrin and Prevessin sites near Geneva on the Swiss-France border. The tunnels housing the LHC and SPS accelerators are also illustrated. Photo credit: US Geological Survey/photo by Jane Doe.

Sunrise deploys mobile network for CERN

CERN Multimedia

2004-01-01

Sunrise, the alternative telecoms provider in Switzerland, is finalizing the installation of a mobile network comprising about forty sites located around the new particle accelerator at CERN (1 paragraph)

Dynamics and tolerances for the CERN Interdigital H linac

International Nuclear Information System (INIS)

Bylinsky, Y.; Ratzinger, U.; Valero, S.

1992-01-01

A three tank Interdigital H structure has been chosen for the 0.25 to 4.2 MeV/u part of the CERN heavy-ion injector linac. The complete design has been developed by GSI; in particular the longitudinal dimensions have been determined and multi-particle studies have been made using the program LORAS. Some RF tolerance studies have also been made at CERN using this program. For a more general approach to the dynamics, the program DYNAC is being used at CERN, especially where statistical analyses are essential; i.e. for determining emittance growth, tolerances on accelerator parameters and alignment. The approaches and results of these two programs are compared for this novel type of accelerator. (Author) 6 refs., 3 tabs., 3 figs

CERN Technical Training 2003: Learning for the LHC!

CERN Multimedia

2003-01-01

AXEL-2003 - Introduction to Particle Accelerators AXEL-2003 is a course given at CERN within the framework of the Technical Training Programme. The course will present an introduction to particle accelerators. Known in the past as the PS Complex Operation Course (or the "PS Shutdown Course"), and organised by the ex-PS division until last year, it is now organised as a joint venture between the AB division and Technical Training, and open to a wider CERN community. The AXEL-2003 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to all people (technicians, engineers, physicists) interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course and the course supports will be in English, with questions and answers also in French. Lectures wil...

CERN Technical Training 2003: Learning for the LHC!

CERN Multimedia

2003-01-01

AXEL-2003  -  Introduction to Particle Accelerators   AXEL-2003 is a course given at CERN within the framework of the Technical Training Programme. The course will present an introduction to particle accelerators. Known in the past as the PS Complex Operation Course (or the "PS Shutdown Course"), and organised by the ex-PS division until last year, it is now organised as a joint venture between the AB division and Technical Training, and open to a wider CERN community. The AXEL-2003 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to all people (technicians, engineers, physicists) interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course and the course supports will be in English, with questions and answers also in French. Lectur...

Pb injector at CERN

International Nuclear Information System (INIS)

Haseroth, H.D.

1996-01-01

For the CERN Lead Ion Accelerating Facility (achieved within a collaboration of several outside laboratories and with financial help of some member states) a new dedicated Linac has been built. This Linac has been installed in 1994 and served during two extended physics runs. This paper reviews the main characteristics of this machine and describes the first operational experience. Emphasis is put on new features of this accelerator, its associated equipment and on the peculiarities of heavy ions. (author)

The miniature accelerator

CERN Multimedia

Antonella Del Rosso

2015-01-01

The image that most people have of CERN is of its enormous accelerators and their capacity to accelerate particles to extremely high energies. But thanks to some cutting-edge studies on beam dynamics and radiofrequency technology, along with innovative construction techniques, teams at CERN have now created the first module of a brand-new accelerator, which will be just 2 metres long. The potential uses of this miniature accelerator will include deployment in hospitals for the production of medical isotopes and the treatment of cancer. It’s a real David-and-Goliath story.   Serge Mathot, in charge of the construction of the "mini-RFQ", pictured with the first of the four modules that will make up the miniature accelerator. The miniature accelerator consists of a radiofrequency quadrupole (RFQ), a component found at the start of all proton accelerator chains around the world, from the smallest to the largest. The LHC is designed to produce very high-intensity beams ...

Induced radioactivity at CERN

CERN Multimedia

1970-01-01

A description of some of the problems and some of the advantages associated with the phenomenon of induced radioactivity at accelerator centres such as CERN. The author has worked in this field for several years and has recently written a book 'Induced Radioactivity' published by North-Holland.

Big research in new dimensions. Thinkers of our time about the actual elementary-particle physics at CERN; Grossforschung in neuen Dimensionen. Denker unserer Zeit ueber die aktuelle Elementarteilchenphysik am CERN

Energy Technology Data Exchange (ETDEWEB)

Kommer, Christoph (ed.) [Heidelberg Univ. (Germany); DKFZ, Heidelberg (Germany); Satz, Helmut [Bielefeld Univ. (Germany). Fakultaet fuer Physik; Blanchard, Philippe [Bielefeld Univ. (Germany). Abt. Theoretische Physik

2016-07-01

The following topics are dealt with: Research from the highest energies to the smallest particles at CERN, the laborious way to the Large Hadronic Collider, CERN as accelerator of techniques, culture, and society, a philosophical and sociological perspective of questions concerning CERN, quark matter research at CERN, the FAIR facility for antiproton and ion research. (HSI)

People and things. CERN Courier, Jun 1990, v. 30(5)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1990-06-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; At a specially-arranged session of CERN Council on 27 April, the delegates of CERN's 14 Member States voted unanimously in favour of admitting Finland as the Organization's 15th Member State. ; In an April 19 test, the initial 5 MeV superconducting section for the injector of the Continuous Electron Beam Accelerator Facility being built at Newport News, Virginia accelerated an electron beam to design energy. ; With construction of the RHIC Relativistic Heavy Ion Collider expected to get underway at Brookhaven in October 1991, preparations for the experimental programme move into top gear. ; On the initiative of Meinhard Regler from the High Energy Physics Institute in Vienna, a series of thirteen posters on accelerators and particle physics have been printed for use in schools.

WEB based user's applications for NA61/SHINE experiment at CERN

CERN Document Server

Piwek, Mateusz

1. Introduction The Master Thesis titled „Web based users applications for NA61/SHINE experiment at CERN” presents the World Wide Web technologies that has been used during development of the software suite for NA61/SHINE experiment. Presented software was implemented and is use by a group of approximately sixty users 1 . The NA61/SHINE is one of many projects that takes place in the European Organization for Nuclear Research – CERN located near Geneva. 1.1. About CERN CERN (French: Organisation européenne pour la recherche nucléaire 2 ) was established on 29 th of September 1954. Poland is a member state since 1991, however a for a long time before joining CERN Poland as the only country of Communist Block had an observatory status. Nowadays Polish scientists are taking a part in a main CERN's experiments such as ALICE, ATLAS or CMS. CERN's essential scientific facilities are the particle physics accelerators and detectors. The beam provided by the accelerator or collider by interacting w...

Status of PACMAN Project at CERN

CERN Document Server

Catalan-Lasheras, Nuria; Modena , Michele

2015-01-01

Though the Large Hadron Collider (LHC) at CERN is just at the start of a program expected to run for 20 additional years, CERN is studying the next generation of colliders, like the Compact Linear Collider (CLIC). This project proposes an electron-positron collider with a length close to 50 km and with a centre of mass energy of 3 TeV at the collision point. One of the main challenges is the sub-micrometric size of the beams, down to a few nanometres at the interaction point. As a consequence, the accelerator will require unprecedented nanometric tolerances of beam alignment. A series of several thousands components will have to be assembled, aligned at the micrometre level and most critically, stabilized actively at the nanometre level. PACMAN, a study on Particle Accelerator Components Metrology and Alignment to the Nanometre scale, is a Marie Curie Program supported by the European Commission (FP7 Program), creating a network of 16 Academic and Industrial Partners. The project is hosted at CERN and it offe...

Cyber-Attacks and the Risks for CERN

CERN Multimedia

Computer Security Team

2013-01-01

In the previous Bulletin, we discussed the cyber-risks for the accelerator complex. However, looking at the broader picture, the cyber-risks for CERN are much more diverse.   Attacks can not only harm the operation of accelerators or experiments, but also impact negatively on the operation of the Organization as a whole and/or its reputation. This would not only hamper and impede our work while making us looking plain stupid, but might also make funding agencies reconsider whether their money is well invested in CERN… Examples? Sure, let’s be imaginative! What would be the consequences, if: a laptop holding sensitive CERN documents is lost or stolen, and ends up on eBay? your password is compromised and your mail account misused to send nasty messages to thousands of external mail addresses? an attacker manages to add photos of naked women/men onto a prominent CERN website, and boasts about this on Twitter? confidential documents like job application forms or passwo...

Japanese contributions to CERN-LHC

International Nuclear Information System (INIS)

Kondo, Takahiko; Shintomi, Takakazu; Kimura, Yoshitaka

2001-01-01

The Large Hadron Collider (LHC) is now under construction at CERN, Geveva, to study frontier researches of particle physics. The LHC is the biggest superconducting accelerator using the most advanced cryogenics and applied superconductivities. The accelerator and large scale detectors for particle physics experiments are being constructed by collaboration with European countries and also by participation with non-CERN countries worldwide. In 1995, the Japanese government decided to take on a share in the LHC project with funding and technological contributions. KEK contributes to the development of low beta insertion superconducting quadrupole magnets and of components of the ATLAS detector by collaboration with university groups. Some Japanese companies have received contracts for technically key elements such as superconducting cable, cold compressor, nonmagnetic steel, polyimide film, and so on. An outline of the LHC project and Japanese contributions are described. (author)

2015 CERN-Fermilab HCP Summer School

CERN Multimedia

2015-01-01

CERN and Fermilab are jointly offering a series of "Hadron Collider Physics Summer Schools", to prepare young researchers for these exciting times. The school has alternated between CERN and Fermilab, and will return to CERN for the tenth edition, from 24 June to 3 July 2015. The CERN-Fermilab Hadron Collider Physics Summer School is an advanced school targeted particularly at young postdocs and senior PhD students working towards the completion of their thesis project, in both Experimental High Energy Physics (HEP) and phenomenology. Lecture Topics include: Statistics in HEP, Heavy Flavour, Heavy Ion, Standard Model, Higgs searches and measurements, BSM theory, BSM searches, Top physics, QCD and Monte Carlos, Accelerators, Detectors for the future, Trigger and DAQ, Dark Matter Astroparticle, and two special lectures on Future Colliders, and 20 years after the top discovery. Calendar and Details: Mark your calendar for  24 June - 3 July 2015, when CERN will welcome students to t...

Nouvel oeil sur le monde au CERN Les physiciens du CERN attendent un signe "divin"

CERN Multimedia

Frei, Pierre-Yves

2004-01-01

On 29th September, CERN will be celebrating its 50th anniversary. As candles, huge projectors will illuminate the sky. For the gift, physicists will have to wait three years: the inaguuration of the new particules accelerator, the LHC

Progress report on CERN activities (June 1981)

International Nuclear Information System (INIS)

Schopper, H.

1981-01-01

Selected topics illustrate results obtained at CERN, mostly during the first half of 1981. The report deals first with the development of facilities for antiproton accumulation and acceleration, and for colliding beams of antiprotons and protons. Other developments of accelerators and of particle detectors are also presented. An outline is then given of the current understanding of the constituents of matter and of the forces acting between them. This framework is used for the presentation of CERN's experimental results. The topics covered include tests of the quark-parton model, properties of the new particles containing charm or beauty quarks, studies of the structure of the nucleon, tests of quantum chromodynamics (QCD), and investigations of the weak interaction. (orig.)

Radiation protection activities around the CERN accelerators

International Nuclear Information System (INIS)

Silari, M.

1997-01-01

The staff of the Survey Section of Radiation Protection (RP) working around the CERN accelerators were as usual very busy. The LEP2 programme is now fully on its way, with the installation of additional superconducting RF cavities carried out during both the winter and summer shutdowns. The LEP energy per beam was thus increased to 80.5 GeV in summer and to 86 GeV in autumn. ACOL and LEAR ended their operational life on 19 December producing, for the last time, antiprotons for the experiments in the South Hall; all experiments will be dismantled in 1997. This programme will be partly replaced by the future Antiproton Decelerator, which was approved by the Research Board in November. Several experiments also came to their end in the North and West Experimental Areas of the SPS. NA44 (in EHN1) and NA47 (in EHN2) ended this year. All experiments installed in beam lines HI, H3, XI and X3 in the West Area also terminated, as these beam lines will be dismantled in the course of 1997 to make room for test facilities for the LHC. Several modifications in the West and North Experimental Areas have already been undertaken at the end of the year and will be continued in 1997. Some equipment installed in the West Area will be moved to the North Area. In addition to routine work, several measurements of synchrotron radiation were made in LEP for the two new energy levels reached in 1996. A number of dedicated measurements were also undertaken in EHN1 (North Area) at the end of the year, during the lead-ion run which closed the physics period. A detailed assessment of releases of radioactivity from the ISOLDE facility was also made

China and CERN renew their Co-operation Agreement

CERN Multimedia

2004-01-01

Dr. Liu Yanhua, Chinese Vice Minister of Science and Technology, and Dr. Robert Aymar, Director-General of CERN, sign a new Co-operation Agreement between the Government of the People's Republic of China and CERN. During his visit to CERN on 17 February, Liu Yanhua, Vice Minister of Science and Technology of the People's Republic of China, signed a new Co-operation Agreement with the Laboratory. The Agreement, which is valid for a period of five years and renewable, lays down the framework for the development of scientific and technological co-operation between CERN and China. This includes China's participation, as a non-Member State, in CERN's research projects as well as its main programmes. Robert Aymar and Liu Yanhua underlined that this Agreement will provide an excellent framework for close co-operation on the LHC Programme and Grid and accelerator technologies. Scientific co-operation between China and CERN is nothing new, as Chinese physicists already took part in the LEP experiments. Today, CERN's C...

New co-operation agreement between CERN and JINR

CERN Multimedia

CERN Bulletin

2010-01-01

CERN Director-General Rolf Heuer (left) and JINR Director Alexei Sissakian (right). On Thursday 28 January, CERN Director-General Rolf Heuer and JINR Director Alexei Sissakian signed a new enlarged co-operation agreement to continue and enhance the scientific and technical co-operation of the two institutes in the field of high-energy physics. CERN and JINR have a long and successful history of collaboration extending back to the earliest days of their existence. The first informal meeting on international co-operation in the field of high-energy accelerators took place at CERN in 1959. It was attended by senior scientists from the United States, the USSR (including JINR) and CERN. Both JINR and CERN have played the role of a bridge between East and West for decades, contributing to the development of international scientific co-operation. In 1992 JINR signed a co-operation agreement with CERN that included an important number of protocols covering JINR’s participation in the construction of th...

Superconducting magnets for particle large accelerators

International Nuclear Information System (INIS)

Kircher, F.

1994-01-01

The different accelerator types (linear, circular) and the advantages of using superconductivity in particle accelerator are first reviewed. Characteristics of some large superconducting accelerators (Tevatron, HERA, RHIC, LHC CERN) are presented. The design features related to accelerator magnets are reviewed: magnet reproducibility, stability, field homogeneity, etc. and the selected design characteristics are discussed: manufacturing method, winding, shielding, cryostat. CEA involvement in this domain mainly addressing quadrupoles, is presented together with the Large Hadron Collider (LHC) project at CERN. Characteristics and design of detector magnets are also described. 5 figs., 2 tabs

The AEGIS experiment at CERN

Energy Technology Data Exchange (ETDEWEB)

Kellerbauer, A., E-mail: a.kellerbauer@cern.ch [Max Planck Institute for Nuclear Physics (Germany); Allkofer, Y.; Amsler, C. [University of Zurich, Physics Institute (Switzerland); Belov, A. S. [Institute for Nuclear Research of the Russian Academy of Sciences (Russian Federation); Bonomi, G. [University of Brescia, Department of Mechanical and Industrial Engineering (Italy); Braeunig, P. [University of Heidelberg, Kirchhoff Institute for Physics (Germany); Bremer, J. [European Organisation for Nuclear Research, Physics Department (Switzerland); Brusa, R. S. [University of Trento, Department of Physics (Italy); Burghart, G. [European Organisation for Nuclear Research, Physics Department (Switzerland); Cabaret, L. [Centre national de la recherche scientifique, Laboratoire Aime Cotton (France); Canali, C. [University of Zurich, Physics Institute (Switzerland); Castelli, F. [University of Milano, Department of Physics (Italy); Chlouba, K. [Czech Technical University in Prague, Department of Physics (Czech Republic); Cialdi, S. [University of Milano, Department of Physics (Italy); Comparat, D. [Centre national de la recherche scientifique, Laboratoire Aime Cotton (France); Consolati, G. [Politecnico di Milano, Department of Physics (Italy); Dassa, L. [University of Brescia, Department of Mechanical and Industrial Engineering (Italy); Noto, L. Di [University of Trento, Department of Physics (Italy); Donzella, A. [University of Brescia, Department of Mechanical and Industrial Engineering (Italy); Doser, M. [European Organisation for Nuclear Research, Physics Department (Switzerland); Collaboration: AEGIS Collaboration; and others

2012-05-15

After the first production of cold antihydrogen by the ATHENA and ATRAP experiments ten years ago, new second-generation experiments are aimed at measuring the fundamental properties of this anti-atom. The goal of AEGIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is to test the weak equivalence principle by studying the gravitational interaction between matter and antimatter with a pulsed, cold antihydrogen beam. The experiment is currently being assembled at CERN's Antiproton Decelerator. In AEGIS, antihydrogen will be produced by charge exchange of cold antiprotons with positronium excited to a high Rydberg state (n > 20). An antihydrogen beam will be produced by controlled acceleration in an electric-field gradient (Stark acceleration). The deflection of the horizontal beam due to its free fall in the gravitational field of the earth will be measured with a moire deflectometer. Initially, the gravitational acceleration will be determined to a precision of 1%, requiring the detection of about 10{sup 5} antihydrogen atoms. In this paper, after a general description, the present status of the experiment will be reviewed.

The Real-Time Data Analysis and Decision System for Particle Flux Detection in the LHC Accelerator at CERN.

CERN Document Server

Zamantzas, C; Dehning, B

2006-01-01

The superconducting Large Hadron Collider (LHC) under construction at the European Organisation for Nuclear Research (CERN) is an accelerator unprecedented in terms of beam energy, particle production rate and also in the potential of self-destruction. Its operation requires a large variety of instrumentation, not only for the control of the beams, but also for the protection of the complex hardware systems. The Beam Loss Monitoring (BLM) system has to prevent the superconducting magnets from becoming normal conducting and protect the machine components against damages making it one of the most critical elements for the protection of the LHC. For its operation, the system requires 3600 detectors to be placed at various locations around the 27 km ring. The measurement system is sub-divided to the tunnel electronics, which are responsible for acquiring, digitising and transmitting the data, and the surface electronics, which receive the data via 2 km optical data links, process, analyze, store and issue warning...

Proposal to negotiate, without competitive tendering, a blanket order for high-voltage thyratrons for the CERN accelerators

CERN Document Server

1999-01-01

This document concerns the supply of thyratrons to be used as high-voltage and high-current switches for the fast-pulsed magnet systems of the CERN accelerators and for the protection of the klystrons of RF systems. In June 1981 the Finance Committee approved the placing, without competitive tendering, of a blanket order with EEV Ltd (UK) for a total value of up to 2 000 000 Swiss francs to cover the supply of thyratrons for the years 1982, 1983 and 1984. New blanket orders were subsequently negotiated for three-year periods with the approval of the Finance Committee in 1984, 1987, 1990 and 1993. After a new market survey in 1995-1996 had confirmed that EEV Ltd is the sole manufacturer of such thyratrons in the CERN Member States, a new blanket order was negotiated in 1996 with the approval of the Finance Committee. The Finance Committee is invited to agree to the negotiation, without competitive tendering, of a new blanket order with EEV Ltd (UK) for up to 800 000 pounds sterling to cover the supply of thyra...

European Committee for Future Accelerators

International Nuclear Information System (INIS)

Mulvey, John

1983-01-01

Nearly 21 years ago, in December 1962, Viktor Weisskopf and Cecil Powell, then respectively CERN's Director General and Chairman of the Scientific Policy Committee, called together a group of European high energy physicists to advise on steps to reach higher energy. The CERN PS had been in operation since 1959, its experimental programme was well established and the time had come to think of the future. The Chairman of the group, which later took the title 'European Committee for Future Accelerators', was Edoardo Amaldi and his influential report, presented to the CERN Council in June 1963, reviewed the whole structure and possible development of the field in the CERN Member States. Its proposals included the construction of the Intersecting Storage Rings (ISR), and of a 300 GeV proton accelerator which was then envisaged as being the major facility of a second CERN Laboratory elsewhere in Europe

CERN selects Fujikura's radiation resistant fiber

CERN Multimedia

2007-01-01

"Fujikura Europe Ltd. (search for Fujikura Europe) today announced that its radiation resistant singlemode optical fiber has been selected by CERN to provide communicaton links within the world's largest particle accelerator..."(2/3 page)

Commissioning of the helium cryogenic system for the HIE- ISOLDE accelerator upgrade at CERN

International Nuclear Information System (INIS)

Delruelle, N; Inglese, V; Leclercq, Y; Pirotte, O; Williams, L

2015-01-01

The High Intensity and Energy ISOLDE (HIE-ISOLDE) project is a major upgrade of the existing ISOLDE and REX-ISOLDE facilities at CERN. The most significant improvement will come from replacing the existing REX accelerating structure by a superconducting linear accelerator (SC linac) composed ultimately of six cryo-modules installed in series, each containing superconducting RF cavities and solenoids operated at 4.5 K. In order to provide the cooling capacity at all temperature levels between 300 K and 4.5 K for the six cryo-modules, an existing helium refrigerator, manufactured in 1986 and previously used to cool the ALEPH magnet during LEP operation from 1989 to 2000, has been refurbished, reinstalled and recommissioned in a dedicated building located next to the HIE-ISOLDE experimental hall. This helium refrigerator has been connected to a new cryogenic distribution line, consisting of a 30-meter long vacuum-insulated transfer line, a 2000-liter storage dewar and six interconnecting valve boxes, one for each cryo-module. This paper describes the whole cryogenic system and presents the commissioning results including the preliminary operation at 4.5 K of the first cryo- module in the experimental hall. (paper)

Medical Applications at CERN and the ENLIGHT Network.

Science.gov (United States)

Dosanjh, Manjit; Cirilli, Manuela; Myers, Steve; Navin, Sparsh

2016-01-01

State-of-the-art techniques derived from particle accelerators, detectors, and physics computing are routinely used in clinical practice and medical research centers: from imaging technologies to dedicated accelerators for cancer therapy and nuclear medicine, simulations, and data analytics. Principles of particle physics themselves are the foundation of a cutting edge radiotherapy technique for cancer treatment: hadron therapy. This article is an overview of the involvement of CERN, the European Organization for Nuclear Research, in medical applications, with specific focus on hadron therapy. It also presents the history, achievements, and future scientific goals of the European Network for Light Ion Hadron Therapy, whose co-ordination office is at CERN.

1988 CERN school of computing

International Nuclear Information System (INIS)

Verkerk, C.

1989-01-01

These Proceedings contain written versions of most of the lectures delivered at the 1988 CERN School of Computing. Five lecture series concerned different aspects of parallel and vector processing: advanced computer architectures; parallel architectures for neurocomputers; Occam and transputers; vectorization of Monte Carlo code; and vectorization of high-energy physics code. Software engineering was the topic of three series of lectures: formal methods for program design; introduction to software engineering; and tutorial lectures on structured analysis and structured design. Lectures on data-acquisition and recording were followed by lectures on new techniques for data analysis in high-energy physics. Computer-assisted design of electronic systems, and silicon compilation and design synthesis for digital systems, were the topic of two other, closely related, lecture series. Lectures on accelerator controls and on robotics are also recorded in these Proceedings. Various other aspects of computing were covered in lectures on high-speed networks document preparation systems, interpersonal communication using computers, and on Fortran 8x. Two general lectures gave an introduction to high-energy physics at CERN. (orig.)

A brief history of CERN

International Nuclear Information System (INIS)

Jacob, M.

2004-01-01

This article draws a brief history of CERN that has just celebrated its jubilee. Today 20 member states contribute to its annual budget that reached 650 million euros in 2004. In 1954 CERN was created by 12 founder states for mainly 3 reasons: 1) to achieve a research facility dedicated to particle physics able to compete with its American counterparts and that no European country could afford alone, 2) to generate with scientific research an example and a promoter for future international collaborations, and 3) to make scientists from different countries that were at war a few years before, to work together. The creation of CERN has not led to a decline of national laboratories as it was feared in the fifties. On the contrary scientific and technical tasks have been dispatched: CERN provides member states with accelerator facilities while national laboratories and universities contribute to the design and fabrication of detectors and to the analysis of experimental data. The history of CERN is marked by 2 main scientific milestones, first the discovery of weak interaction through neutral currents in 1973 and secondly the discovery of W and Z bosons in 1983. (A.C.)

CERN'S TECHNICAL CONTROL ROOM (TCR) A CENTRAL SERVICE FOR EVERYONE

CERN Multimedia

Mario Batz / TCR Responsible

2000-01-01

The Technical Control Room (TCR) monitors and operates the entire technical infrastructure of CERN 24 hours a day, 365 days a year. It registers and dispatches troubleshooting requests to the appropriate equipment services. In addition, the TCR executes first-line interventions on the entire CERN site. Troubleshooting requests are transmitted to the TCR either via a computerised control system or via the phone number 72201. More than 10'000 such requests are dispatched and dealt with every year. The TCR's diverse field of activity concerns the following systems: electrical and fluid distribution networks, heating, cooling, ventilation, air-conditioning and gas equipment, safety and communication installations, electromechanical systems (e.g. lifts, cranes, machine tools, motorised doors), sanitary systems (leaks, sewage), control and monitoring infrastructure equipment, buildings. These systems can either be part of the administrative infrastructure, such as offices or restaurants, or part of the tec...

CERN'S TECHNICAL CONTROL ROOM (TCR) A CENTRAL SERVICE FOR EVERYONE

CERN Document Server

Mario Batz

2002-01-01

The Technical Control Room (TCR) monitors and operates the entire technical infrastructure of CERN 24 hours a day, 365 days a year. It registers and dispatches troubleshooting requests to the appropriate equipment services. In addition, the TCR executes first-line interventions on the entire CERN site. Troubleshooting requests are transmitted to the TCR either via a computerised control system or via the phone number '72201'. More than 10'000 such requests are dispatched and dealt with every year. The TCR's diverse field of activity concerns the following systems: electrical and fluid distribution networks, heating, cooling, ventilation, air-conditioning and gas equipment, safety and communication installations, electromechanical systems (e.g. lifts, cranes, machine tools, motorised doors), sanitary systems (leaks, sewage), control and monitoring infrastructure equipment, buildings. These systems can either be part of the administrative infrastructure, such as offices or restaurants, or part of the t...

CERN'S TECHNICAL CONTROL ROOM (TCR) A CENTRAL SERVICE FOR EVERYONE

CERN Multimedia

Mario Batz (TCR Responsible)

2001-01-01

The Technical Control Room (TCR) monitors and operates the entire technical infrastructure of CERN 24 hours a day, 365 days a year. It registers and dispatches troubleshooting requests to the appropriate equipment services. In addition, the TCR executes first-line interventions on the entire CERN site. Troubleshooting requests are transmitted to the TCR either via a computerised control system or via the phone number '72201'. More than 10'000 such requests are dispatched and dealt with every year. The TCR's diverse field of activity concerns the following systems: electrical and fluid distribution networks, heating, cooling, ventilation, air-conditioning and gas equipment, safety and communication installations, electromechanical systems (e.g. lifts, cranes, machine tools, motorised doors), sanitary systems (leaks, sewage), control and monitoring infrastructure equipment, buildings. These systems can either be part of the administrative infrastructure, such as offices or restaurants, or part of the t...

CERN's Technical Control Room (TCR) A Central Service for Everyone

CERN Document Server

Mario Batz

2001-01-01

The Technical Control Room (TCR) monitors and operates the entire technical infrastructure of CERN 24 hours a day, 365 days a year. It registers and dispatches troubleshooting requests to the appropriate equipment services. In addition, the TCR executes first-line interventions on the entire CERN site. Troubleshooting requests are transmitted to the TCR either via a computerised control system or via the phone number '72201'. More than 10'000 such requests are dispatched and dealt with every year. The TCR's diverse field of activity concerns the following systems: electrical and fluid distribution networks, heating, cooling, ventilation, air-conditioning and gas equipment, safety and communication installations, electromechanical systems (e.g. lifts, cranes, machine tools, motorised doors), sanitary systems (leaks, sewage), control and monitoring infrastructure equipment, buildings. These systems can either be part of the administrative infrastructure, such as offices or restaurants, or part of the t...

CERN'S TECHNICAL CONTROL ROOM (TCR) A CENTRAL SERVICE FOR EVERYONE

CERN Multimedia

Mario Batz (TCR Responsible)

2001-01-01

The Technical Control Room (TCR) monitors and operates the entire technical infrastructure of CERN 24 hours a day, 365 days a year. It registers and dispatches troubleshooting requests to the appropriate equipment services. In addition, the TCR executes first-line interventions on the entire CERN site. Troubleshooting requests are transmitted to the TCR either via a computerised control system or via the phone number 72201. More than 10'000 such requests are dispatched and dealt with every year. The TCR's diverse field of activity concerns the following systems: electrical and fluid distribution networks, heating, cooling, ventilation, air-conditioning and gas equipment, safety and communication installations, electromechanical systems (e.g. lifts, cranes, machine tools, motorised doors), sanitary systems (leaks, sewage), control and monitoring infrastructure equipment, buildings. These systems can either be part of the administrative infrastructure, such as offices or restaurants, or part of the tec...

CHANGE@CERN:Task Force 2: reshaping for the future

CERN Multimedia

2002-01-01

Second in our series reviewing the Task Forces reports. How to lay the foundations for a more efficient organisational structure. Our present organization is based on sixteen Divisions and units under the Directorate. CERN's organization is based on a Directorate and sixteen Divisions and units, while its activities are broadly divided into four Sectors: Research, Accelerators, Technical and Administration. The mandate of Task Force 2, led by Horst Wenninger, was to identify if a structural change and a reduction of duplicated efforts could result in an increased efficiency at CERN, especially as the Laboratory continues to focus its resources on the LHC. 'This is the most difficult project ever undertaken at CERN', acknowledges Wenninger, 'a double accelerator at a temperature of 1.9 K'. For the next five years the success of the LHC must be the main priority, and CERN will have to adapt the procedures of how it works. Wenninger sees the process as an opportunity for the Laboratory to move into the 21st c...

European Researchers’ Night: Activities at CERN for All Audiences | 30 September

CERN Multimedia

2016-01-01

On Friday 30 September, CERN will be among the scientific organisations and institutes of over 300 towns and cities in Europe taking part in the European Researchers’ Night.   Activities for young and old, scientists and non-scientists alike, will be available in several languages from 6 p.m. to 11 p.m., mainly in the Globe of Science and Innovation. Visits to other venues will depart from this point. The programme will include: screenings of science documentaries and prize-winning short films, guided tours of the ATLAS Visitor Centre, visits to the Universe of Particles exhibition.   Two food trucks will be available to please your taste buds and quench your thirst. If you’re unable to travel to CERN, take a virtual tour of the experiments from your armchair! The tours will be conducted in several languages and will be webcast live from the various CERN venues as follows: 6 p.m. - CERN Control Centre, the nerve centre from which all of CERN’s accelerators a...

XUIMS the X-Window User Interface Management System at CERN

CERN Document Server

Van den Eynden, M

1995-01-01

The CERN X-Window User Interface Management System (XUIMS) is a modular and highly configurable software development environment allowing the interactive design, prototyping, and production of OSF/Motif Human Computer Interfaces (HCI). Fully compliant with the X11R5 and OSF/Motif industry standards, XUIMS covers complex software areas like the development of schematics, the visualization and on-line interactions with 2D and 3D scientific data, the display of relational database data, and the direct access to CERN SPS and LEP accelerators equipment. The guarantee of consistency across the applications and the encapsulation of complex functionality in re-usable and user-friendly components has also been implemented through the development of home made graphical objects (widgets) and templates. The XUIMS environment is built with commercial software products integrated in the CERN SPS and LEP controls infrastructure with a very limited home-made effort. Productivity and quality have been improved through less co...

News from the Library: About a dozen prestigious CERN physicists contribute to a special issue of EPJ H

CERN Multimedia

CERN Library

2012-01-01

European Physical Journal H is a journal published by Springer that focuses on the historical development of ideas in contemporary physics. Since 2009 it has partially replaced the journal "Annales de Physique" published by EDP sciences.   The journal recently published a special issue about CERN accelerators entitled "CERN's accelerators, experiments and international integration 1959-2009", with the former CERN Director-General, Herwig Schopper, as guest editor. The origin of this issue is a symposium that took place at CERN on 3-4 December 2009: "50 years of Nobel Memories in High-Energy Physics", for the 50th anniversary of the CERN Proton Synchrotron. Some of the contributions to this symposium became articles that are a real treasure for physicists and historians. Many of these are actually personal recollections from the main actors of the CERN accelerators. In addition, regular papers have been invited to make this ...

The CERN accelerator measurement database: on the road to federation

International Nuclear Information System (INIS)

Roderick, C.; Billen, R.; Gourber-Pace, M.; Hoibian, N.; Peryt, M.

2012-01-01

The Measurement database, acting as short-term central persistence and front-end of the CERN accelerator Logging Service, receives billions of time-series data per day for 200000+ signals. A variety of data acquisition systems on hundreds of front-end computers publish source data that eventually end up being logged in the Measurement database. As part of a federated approach to data management, information about source devices are defined in a Configuration database, whilst the signals to be logged are defined in the Measurement database. A mapping, which is often complex and subject to change/extension, is required in order to subscribe to the source devices, and write the published data to the corresponding named signals. Since 2005, this mapping was done by means of dozens of XML files, which were manually maintained by multiple persons, resulting in a configuration that was error prone. In 2010 this configuration was fully centralized in the Measurement database itself, reducing significantly the complexity and the actors in the process. Furthermore, logging processes immediately pick up modified configurations via JMS based notifications sent directly from the database. This paper will describe the architecture and the benefits of current implementation, as well as the next steps on the road to a fully federated solution. (authors)

CERN stop-over for KEK and Fermilab Directors

CERN Multimedia

2001-01-01

En route for a meeting of the International Committee for Future Accelerators, ICFA, held at Germany's DESY laboratory, the Directors of Japan's KEK laboratory and Fermilab in the United States had a stop-over at CERN last Wednesday 7 February. Dr Hirotaka Sugawara, Director General of Japan's high energy physics laboratory, KEK, visited the Antiproton Decelerator, AD. From left to right, Masaki Hori, member of the ASACUSA collaboration, John Eades, contact person for ASACUSA, Dr Hirotaka Sugawara, Werner Pirkl, the PS Division engineer responsible for the Radio Frequency Quadrupole decelerator in the foreground, and Kurt Hübner, CERN's Director of Accelerators. Dr Michael S. Witherell, Director of the Fermi National Accelerator Laboratory, Fermilab, visited construction sites for the LHC, ATLAS, and CMS. He is seen here with a module of the CMS hadronic calorimeter in building 186.

CERN as seen by its personnel

CERN Multimedia

2009-01-01

How are the various players in research experiencing the run-up to the restart of the LHC? How do they feel their work is perceived outside CERN? After interviewing the inhabitants of Meyrin, Divonne-les-Bains and Geneva on the subject of the LHC and CERN, the Bulletin went to put its questions to the CERN personnel themselves. For some, working at CERN had always been a childhood dream. Today, as we approach the restart of the largest particle accelerator in the world, everybody is very enthusiastic about taking part in this adventure. In the words of a CMS physicist: "This is something that happens once in a scientist’s lifetime!" But what do the researchers consider to be the most important thing we do at CERN? It’s difficult to pin them down to any one specific thing, so this question gets the virtually unanimous general reply: "the advancement of knowledge". Many also mention the concrete spin-offs of technology transfer. However, nobody can anticipate what developments will arise in this field: wh...

The LHC Physics Centre at CERN

CERN Document Server

CERN Bulletin

2010-01-01

As the LHC goes on line for its first exploration of the new high-energy frontier, CERN is also getting ready to enhance the support it provides for the analysis and interpretation of the emerging data.    The LHC Physics Centre at CERN (LPCC) has started up over the past couple of months, beginning with a series of initiatives ranging from Workshops to lectures for students. More details about the LPCC will be featured in a forthcoming Bulletin article. In the meantime, you can consult the LPCC web page, now available at http://cern.ch/lpcc. This offers the high energy physics community a portal to the LPCC's activities, as well as to useful resources, tools and information about the LHC physics programme, the progress of accelerator operations, relevant workshops and events around the world, and much more. The LPCC will shortly begin issuing a weekly bulletin of its own, distributed by e-mail. Members of the CERN physics community and subscribers to the CERN Bulletin will receive the ...

Golden Jubilee photos: CERN gets a second Laboratory

CERN Multimedia

2004-01-01

CERN's first large accelerator, the Proton Synchrotron (PS), had hardly come into operation at the beginning of the 1960s, when physicists started to dream of a machine ten times more powerful, operating at 300 Gigaelectronvolts. The construction of such an accelerator required a new laboratory to be built and several European sites were candidates. John Adams, the project leader, suggested using the PS as an injector for the new machine, to achieve the higher energy level at a lower cost. The new Laboratory was therefore to be built on a site adjacent to CERN. The project was approved in 1971, but the CERN Convention, which only provided for a single laboratory, had to be amended. An agreement was signed with France on 16 June 1972 (see photograph), establishing a new site at Prévessin, in the Pays de Gex. The two laboratories, which each had their own administrative structures and Directors-General, were merged in 1976.

The AWAKE Experimental Facility at CERN

CERN Document Server

Gschwendtner, E; Bracco, C; Butterworth, A; Cipiccia, S; Doebert, S; Fedosseev, V; Feldbaumer, E; Hessler, C; Hofle, W; Martyanov, M; Meddahi, M; Osborne, J; Pardons, A; Petrenko, A; Vincke, H

2014-01-01

AWAKE, an Advanced Wakefield Experiment is launched at CERN to verify the proton driven plasma wakefield acceleration concept. Proton bunches at 400 GeV/c will be extracted from the CERN SPS and sent along a 750 m long proton line to a plasma cell, a Rubidium vapour source, where the proton beam drives wakefields reaching accelerating gradients of several gigavolts per meter. A high power laser pulse will copropagate within the proton bunch creating the plasma by ionizing the (initially) neutral gas. An electron beam will be injected into the plasma cell to probe the accelerating wakefield. The AWAKE experiment will be installed in the CNGS facility. First proton beam to the plasma cell is expected by end 2016. The installation planning and the baseline parameters of the experiment are shown. The design of the experimental area and the integration of the new beam-lines as well as the experimental equipment are presented. The needed modifications of the infrastructure in the facility and a few challenges are h...

Recognition in Britain for CERN personalities

CERN Multimedia

2001-01-01

Sir Chris Llewellyn Smith Lyn Evans British CERN personalities were rewarded for their contribution to physics in this year's prestigious New Year Honours. Chris Llewellyn Smith, Director General from 1994 to 1998, was knighted for services to particle physics. 'The citation, 'for services to particle physics', obviously includes my period at CERN. The honour therefore recognises the work of everyone at CERN, including particularly the contributions of those who worked with me in the Directorate and the Management Board', said Sir Chris. Lyn Evans, Director of the LHC project, was awarded the CBE, Commander of the British Empire, for services to accelerator physics. Erwin Gabathuler, Director of Research from 1981 to 1983 was awarded the OBE, Officer of the British Empire, for services to physics.

Optimization of accelerator control

International Nuclear Information System (INIS)

Vasiljev, N.D.; Mozin, I.V.; Shelekhov, V.A.; Efremov, D.V.

1992-01-01

Expensive exploitation of charged particle accelerators is inevitably concerned with requirements of effectively obtaining of the best characteristics of accelerated beams for physical experiments. One of these characteristics is intensity. Increase of intensity is hindered by a number of effects, concerned with the influence of the volume charge field on a particle motion dynamics in accelerator's chamber. However, ultimate intensity, determined by a volume charge, is almost not achieved for the most of the operating accelerators. This fact is caused by losses of particles during injection, at the initial stage of acceleration and during extraction. These losses are caused by deviations the optimal from real characteristics of the accelerating and magnetic system. This is due to a number of circumstances, including technological tolerances on structural elements of systems, influence of measuring and auxiliary equipment and beam consumers' installations, placed in the closed proximity to magnets, and instability in operation of technological systems of accelerator. Control task consists in compensation of deviations of characteristics of magnetic and electric fields by optimal selection of control actions. As for technical means, automatization of modern accelerators allows to solve optimal control problems in real time. Therefore, the report is devoted to optimal control methods and experimental results. (J.P.N.)

The first component of the Palais de l'Equilibre arrives at CERN.

CERN Multimedia

Patrice Loïez

2003-01-01

Jean-Luc Baldy, Head of CERN civil engineering; Heiner Rieder, from the company appointed by the Swiss Confederation; Thomas B chi, wood-engineer from the Charpente-Concept SA; Carlo Wyss, CERN director for accelerators, and Hervé Dessinoz, the architect, in front of the keystone of the Palais de l'Equilibre.This was given to CERN by the Swiss Confederation to commemorate the 50th Anniversary of CERN and renamed the Globe of Science and Innovation.

Russia-CERN: the solid collaboration continues

CERN Multimedia

2002-01-01

CERN and Russia have recently signed an extension to the 1996 protocol defining the Russian contribution to LHC construction. Russian scientists are taking part in the construction of the accelerator and are also extensively involved in building the detectors.

CERN exhibition attracts over 100,000 visitors in Belgrade

CERN Multimedia

Antonella Del Rosso

2012-01-01

“This must be an 'all-time record',” says Ray Lewis, CERN travelling exhibition manager. “In all my time with the various permanent and travelling exhibitions that have taken place locally and within our Member States I have never experienced such figures.”   Zarko Obradovic (left), Serbian Minister of Education, Science and Technology, and Rolf Heuer (right), CERN Director-General, at the CERN travelling exhibition in Belgrade. Indeed, in approximately 20 days of exhibition time about 120,000 people, mainly school visiters and the general public, visited the 100 m2 CERN mini-exhibition. It was set up in the centre of Belgrade in October, in association with the meeting of the Restricted European Committee for Future Accelerators (RECFA). After attending the RECFA meeting, CERN's Director-General Rofl Heuer opened the CERN exhibition on the evening of 19 October. Lectures about CERN were held every afternoon, and two public de...

CERN Open Days 2013, Point 4: LHC Radio Frequency

CERN Multimedia

CERN Photolab

2013-01-01

Stand description: At Point 4 visitors will descend into the LHC tunnel to see the "engine" of the collider: the accelerating cavities where the circulating particles get a small kick of energy as they pass by 11,000 times each second. During your visit underground, you will see the superconducting magnets as well as instruments for observing the beams. You will also walk through the huge cavern containing the Radio Frequency power plants which provide the particle beams with energy. On surface no restricted access  Above ground, you will see the cryogenics installations which keep the accelerator at a just few degrees above absolute zero. Lots of fascinating information and exhibits about CERN's accelerators and experiments will be on display, with CERN engineers and physicists on hand all day to answer your questions.

Sharing scientific discovery globally: toward a CERN virtual visit service

Science.gov (United States)

Goldfarb, S.; Hatzifotiadou, D.; Lapka, M.; Papanestis, A.

2017-10-01

The installation of virtual visit services by the LHC collaborations began shortly after the first high-energy collisions were provided by the CERN accelerator in 2010. The experiments: ATLAS [1], CMS [2], LHCb [3], and ALICE [4] have all joined in this popular and effective method to bring the excitement of scientific exploration and discovery into classrooms and other public venues around the world. Their programmes, which use a combination of video conference, webcast, and video recording to communicate with remote audiences have already reached tens of thousands of viewers, and the demand only continues to grow. Other venues, such as the CERN Control Centre, are also considering similar permanent installations. We present a summary of the development of the various systems in use around CERN today, including the technology deployed and a variety of use cases. We then lay down the arguments for the creation of a CERN-wide service that would support these programmes in a more coherent and effective manner. Potential services include a central booking system and operational management similar to what is currently provided for the common CERN video conference facilities. Certain choices in technology could be made to support programmes based on popular tools including (but not limited to) Skype™ [5], Google Hangouts [6], Facebook Live [7], and Periscope [8]. Successful implementation of the project, which relies on close partnership between the experiments, CERN IT CDA [9], and CERN IR ECO [10], has the potential to reach an even larger, global audience, more effectively than ever before.

Proposal for the award of an industrial services contract for installation and removal of cables for CERN accelerators

CERN Document Server

2000-01-01

This document concerns the award of an Industrial Services contract for installation and removal of cables for CERN accelerators. Following a market survey carried out among 128 firms in sixteen Member States, a call for tenders (IT-2760/ST) was sent on 2 June 2000 to eight firms and six consortia, four consisting of two firms, one consisting of three firms and one of four firms, in nine Member States. By the closing date, CERN had received tenders from one firm and six consortia, in nine Member States. The Finance Committee is invited to agree to the negotiation of a contract with the consortium FABRICOM (BE) - AMSE (FR), the lowest bidder, for an initial period of three years from 1 July 2001 for a total amount of 18 000 000 Swiss francs, not subject to revision. The contract will include options for two one-year extensions beyond the initial three-year period. The consortium has indicated the following distribution by country of the contract value covered by this adjudication proposal: PL-40%, FR-35%, BE-2...

Google Science Fair winner visits CERN

CERN Document Server

Katarina Anthony

2012-01-01

Google Science Fair Grand Prize winner Brittany Michelle Wenger today wrapped up a day-and-a-half's visit of the CERN site. Her winning project uses an artificial neural network to diagnose breast cancer – a non-invasive technique with significant potential for use in hospitals.   Brittany Michelle Wenger at CERN's SM18 Hall. Besides winning a $50,000 scholarship from Google and work experience opportunities with some of the contest hosts, Brittany was offered a personal tour of CERN. “This visit has just been incredible,” she says. “I got to speak with [CERN's Director for Accelerators and Technology] Steve Myers about some of the medical applications and technologies coming out of the LHC experiments and how they can be used to treat cancer. We talked about proton therapy and hadron therapy, which could really change the way patients are treated, improving success rates and making treatment not such an excruciating process. That ...

The CERN accelerator complex

CERN Multimedia

Mobs, Esma Anais

2016-01-01

The LHC is the last ring (dark blue line) in a complex chain of particle accelerators. The smaller machines are used in a chain to help boost the particles to their final energies and provide beams to a whole set of smaller experiments, which also aim to uncover the mysteries of the Universe.

The CERN accelerator complex

CERN Multimedia

Christiane Lefèvre

2008-01-01

The LHC is the last ring (dark grey line) in a complex chain of particle accelerators. The smaller machines are used in a chain to help boost the particles to their final energies and provide beams to a whole set of smaller experiments, which also aim to uncover the mysteries of the Universe.

The CERN accelerator complex

CERN Multimedia

Haffner, Julie

2013-01-01

The LHC is the last ring (dark grey line) in a complex chain of particle accelerators. The smaller machines are used in a chain to help boost the particles to their final energies and provide beams to a whole set of smaller experiments, which also aim to uncover the mysteries of the Universe.

People and things. CERN Courier, Dec 1990, v. 30(9)

International Nuclear Information System (INIS)

Anon.

1990-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; Prospects for approval of the proposed KAON Factory at the Canadian TRIUMF Laboratory in Vancouver took a further step forward in September when Premier Vander Zalm of British Columbia announced that his government would double their financial commitment to 236 million Canadian dollars. ; The CERN Accelerator School (CAS) and the UK Rutherford Appleton Laboratory are organizing a course on R.F. Engineering for Particle Accelerators, to be held from 3-10 April 1991 at Exeter College, Oxford, aimed at staff in accelerator laboratories, universities and manufacturing companies specializing in r.f. and microwave equipment

People and things. CERN Courier, Dec 1990, v. 30(9)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1990-12-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; Prospects for approval of the proposed KAON Factory at the Canadian TRIUMF Laboratory in Vancouver took a further step forward in September when Premier Vander Zalm of British Columbia announced that his government would double their financial commitment to 236 million Canadian dollars. ; The CERN Accelerator School (CAS) and the UK Rutherford Appleton Laboratory are organizing a course on R.F. Engineering for Particle Accelerators, to be held from 3-10 April 1991 at Exeter College, Oxford, aimed at staff in accelerator laboratories, universities and manufacturing companies specializing in r.f. and microwave equipment.

CERN's Guardian Angels

CERN Multimedia

2002-01-01

Any trouble at CERN? The Technical Control Room operates the entire technical infrastructure of CERN every day, all year long. They deal with problems that go from simple water leaks to devastating power cuts.   The Technical Control Room with Kenneth Olesen and Mark Harvey, minutes before their starting time. This big room is probably the liveliest at CERN, since there's always someone there, everyday, all year long. Laurent Randot and Eric Lienard working in the Technical Control Room at CERN in building 212. They've started at 7 a.m. and today has been a relatively quiet day. There have been some microcuts in the electric net because of the wind. But these have been repaired rather quickly... The relief: It's 2.30 p.m. Time for Laurent Randot and Eric Lienard to show their colleagues Mark Harvey and Kenneth Olesen what has been going on during the morning. They are the next TCR team of the day. Mark Harvey and Kenneth Olesen start their working day. They will work until 11p.m., when another team wil...

Energy isn't Everything: CERN's Fixed Target Niche (1/2)

CERN Multimedia

CERN. Geneva

2008-01-01

Fixed target physics at CERN remains an essential part of the laboratory's scientific programme and horizon. In recent years fixed target and decay physics using CERN's unique accelerator and beam facilities continues enabling unique experiments to be undertaken. An overview is presented of the status of this physics and, wherever appropriate, of its future.

Energy isn't Everything: CERN's Fixed Target Niche (2/2)

CERN Multimedia

CERN. Geneva

2008-01-01

Fixed target physics at CERN remains an essential part of the laboratory's scientific programme and horizon. In recent years fixed target and decay physics using CERN's unique accelerator and beam facilities continues enabling unique experiments to be undertaken. An overview is presented of the status of this physics and, wherever appropriate, of its future.

Instrumentation Of The CERN Accelerator Logging Service: Ensuring Performance, Scalability, Maintenance And Diagnostics

CERN Document Server

Roderick, C; Dinis Teixeira, D

2011-01-01

The CERN accelerator Logging Service currently holds more than 90 terabytes of data online, and processes approximately 450 gigabytes per day, via hundreds of data loading processes and data extraction requests. This service is mission-critical for day-to-day operations, especially with respect to the tracking of live data from the LHC beam and equipment. In order to effectively manage any service, the service provider’s goals should include knowing how the underlying systems are being used, in terms of: “Who is doing what, from where, using which applications and methods, and how long each action takes”. Armed with such information, it is then possible to: analyse and tune system performance over time; plan for scalability ahead of time; assess the impact of maintenance operations and infrastructure upgrades; diagnose past, on-going, or re-occurring problems. The Logging Service is based on Oracle DBMS and Application Servers, and Java technology, and is comprised of several layered and multi-tiered s...

CLIC accelerator modules under construction at CERN

CERN Multimedia

Anna Pantelia

2012-01-01

The Compact LInear Collider (CLIC) study is dedicated to the design of an electron-positron (e- e+) linear accelerator, colliding particle beams at the energy of 3 TeV. The CLIC required luminosity can be reached with powerful particle beams (14 MW each) colliding with extremely small dimensions and high beam stability at the interaction point. The accelerated particle beams must have dimensions of 45 nm in the horizontal plane and 1 nm in the vertical plane. CLIC relies upon a novel two-beam acceleration concept in which the Radio Frequency (RF) power is extracted from a low energy but high-intensity particle beam, called Drive Beam (DB), and transferred to a parallel high energy accelerating particle beam, called Main Beam (MB). The extraction and transfer of the RF power is achieved by the Power Extraction and Transfer Structures (PETS) and the particle beam acceleration is achieved with high precision RF-Accelerating Structures (AS), operating at 11.9942 GHz with an accelerating gradient of 100 MV/m, whi...

CERN selects Fujikura's radiation resistant fiber

CERN Multimedia

2007-01-01

"Fujikura recently announced that its radiation resistant single mode optical fiber has been selected by CERN, the European Laboratory for Particle Physics, to provide communication links within the world's largest particle accelerator - the Large Hadron Collider (LHC) - near Geneva, Switzerland." (1/2 page)

CERN selects Fujikura's radiation resistant fibre

CERN Multimedia

2007-01-01

"Fujikura today announced that its radiation resistant single mode optical fibre has been selected by CERN, the European Laboratory for Particle Physics, to provide communication links within the world's largest particle accelerator - the Large hadron Collider (LHC) - near Genevan, Switzerland. (1/2 page)

The CERN GSM monitoring system

International Nuclear Information System (INIS)

Ghabrous, Carlos

2010-01-01

This paper presents the way CERN has approached the problem of monitoring its own GSM infrastructure, especially in the Large Hadron Collider (LHC) accelerator tunnel and other underground facilities, where a leaky feeder cable carries mobile phone signals, and where this technology is the only means for inter-personnel communications.

Cost overruns will hit research at CERN

CERN Multimedia

Weiss, G

2002-01-01

To try and offset cost overruns on the LHC, CERN managers have drafted a preliminary plan that would delay start-up of the accelerator until 2007 and drastically reduces spending on longterm research programmes (1 page).

CERN's LHC is awarded the 2012 EPS Edison Volta Prize

CERN Multimedia

CERN Bulletin

2012-01-01

The European Physical Society (EPS), the Centro di Cultura Scientifica “Alessandro Volta” and Edison S.p.A. have awarded the 2012 EPS Edison Volta Prize for outstanding contributions to physics to three CERN physicists.   The award was given to: • Rolf-Dieter Heuer, CERN Director-General, • Sergio Bertolucci, CERN Director for Research and Computing, • Stephen Myers, CERN Director for Accelerators and Technology, for having led - building on decades of dedicated work by their predecessors - the culminating efforts in the direction, research and operation of the CERN Large Hadron Collider (LHC), which resulted in many significant advances in high energy particle physics, in particular, the first evidence of a Higgs-like boson in July 2012. To learn more, check out e-EPS News.

CERN moves to http://home.cern

CERN Multimedia

2015-01-01

A new top-level domain for CERN will be inaugurated next week, with the migration of the core website to http://home.cern.   The new home.cern webpage. The .cern top-level domain is intended for the exclusive use of CERN and its affiliates, and will soon be open for applications from within the community. Clear governance mechanisms for registration and management of .cern domains have been put in place. Applications for domains may be submitted by current members of the CERN personnel, and must be sponsored by a CERN entity such as a department, experiment, project or CERN-recognised experiment. For more information please refer to the registration policy. The acquisition of the .cern top-level domain was negotiated via ICANN’s new gTLD programme by a board comprising members of the CERN Legal Service, Communications group and IT department. .cern is one of over 1,300 new top-level domains that will launch over the coming months and years. The .cern domain nam...

Visits to CERN by Norwegian and Portuguese officials

CERN Document Server

2003-01-01

During his visit to CERN on 30 April 2003, Mr Bjørn Haugstad, State Secretary, Ministry of Education and Research, Norway, toured the LHC magnet test hall and the installations of ATLAS and the European Computing Grid project. Seen here, at a luncheon given in his honour, from left to right: Bjørn Haugstad, State Secretary, Ministry of Education and Research, Norway, Cecilia Jarlskog, CERN Adviser on Member State Relations, Morten Knutsen, CERN Purchasing Service, Jens Vigen, CERN Library, Steinar Stapnes, physicist at the ATLAS experiment and Professor at the University of Oslo, Carlo Wyss, CERN's Director for Accelerators (standing) and Leif Westgaard, Norwegian delegate to the CERN Council and member of the Norwegian Research Council. His visit was followed a few days later, on 6 May, by that of the Portuguese Minister for Science and Higher Education, H. E. Mr Pedro Augusto Lynce de Faria, who was also given a tour of various ATLAS and LHC installations. The Minister also had the opportunity to meet me...

Process computers automate CERN power supply installations

International Nuclear Information System (INIS)

Ullrich, H.; Martin, A.

1974-01-01

Higher standards of performance and reliability in the power plants of large particle accelerators necessitate increasing use of automation. The CERN (European Nuclear Research Centre) in Geneva started to employ process computers for plant automation at an early stage in its history. The great complexity and extent of the plants for high-energy physics first led to the setting-up of decentralized automatic systems which are now being increasingly combined into one interconnected automation system. One of these automatic systems controls and monitors the extensive power supply installations for the main ring magnets in the experimental zones. (orig.) [de

Major Refit for CERN's 400 kV Substation

CERN Multimedia

2001-01-01

The 400 kV substation on the Prévessin site brings in the electricity that powers CERN's accelerators and the majority of the Laboratory's installations. It was originally built in the 1970s for the SPS, and is one of only five privately owned 400 kV sub-stations in France. Three of the others belong to the national railway company, SNCF, supplying the Paris-Marseilles TGV line, the other is at the Cadarache research centre near mouth of the Rhone. After nearly thirty years of service, CERN's substation has just undergone a complete overhaul. The new main 18 kV switchboard for the SPS pulsed network. The electricity supply for the original Prévessin substation was from the 400 kV EDF network, delivered through three 90 MW transformers at 18 kV to the SPS pulsed network, With the arrival of LEP, two 110 MW transformers were added to supply the new accelerator. Now, as CERN gears up for the LHC, additional pulsed power capacity is needed to supply the transfer lines carrying protons from...

India and CERN: a collaboration in good shape

CERN Multimedia

2002-01-01

The addenda were signed by the director of India's Centre for Advanced Technology, Dilip Bhawalkar, and LHC project leader, Lyn Evans. Back row, from left to right: P.J. Bryant, Ph. Lebrun, V.C. Sahni, M. Karmarkar, S. Bhave, G. Govindarajan. The director of India's Centre for Advanced Technology, Dilip Bhawalkar, and LHC project leader Lyn Evans have just signed the final addenda for the first Indian contribution to the LHC at a meeting of the Indian Department of Atomic Energy (DAE) - CERN joint committee. The main component of this contribution covers the superconducting corrector magnets for the accelerator's main dipoles and quadrupoles. During their visit, members of the DAE delegation visited the assembly laboratory where Indian engineers working at CERN under the CERN-India co-operation agreement are involved in the warm and cold magnet measurements of the LHC magnets. The Indian collaboration with CERN started in 1991, when India signed a co-operation Agreement with CERN with a view to participatin...

Technical training: AXEL-2009 - Introduction to Particle Accelerators

CERN Multimedia

HR Department

2009-01-01

CERN Technical Training 2009: Learning for the LHC! AXEL-2009 is a course series on particle accelerators, given at CERN within the framework of the 2009 Technical Training Program. Known in the past as the PS Complex Operation Course (or the ‘PS Shutdown Course’), the general accelerator physics module as been organized since 2003 as a joint venture between the AB Department and Technical Training Service, and is open to a wider CERN community. The AXEL-2009 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is also open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge of accelerators. However, some basic knowledge of trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) from 19 to 23 January 2009, and will be given i...

Technical Training: AXEL-2005 - Introduction to Particle Accelerators

CERN Multimedia

Monique Duval

2005-01-01

CERN Technical Training 2005: Learning for the LHC! AXEL-2005 is a course series on particle accelerators, given at CERN within the framework of the 2005 Technical Training Programme. Known in the past as the PS Complex Operation Course (or the 'PS Shutdown Course', now AB/OP), the general accelerator physics section is organised since 2003 as a joint venture between the AB department and Technical Training, and is open to a wider CERN community. The AXEL-2005 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to all people (technicians, engineers, physicists) interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course will be given in French on course supports in English; questions and answers possible in both languages. AXEL-2005 - I...

Technical training: AXEL-2012 - Introduction to Particle Accelerators

CERN Multimedia

HR Department

2011-01-01

CERN Technical Training 2012: Learning for the LHC! AXEL-2012 is a course series on particle accelerators, given at CERN within the framework of the Technical Training Program. Being part of BE Department’s Operation Group Shutdown Lecture series, the general accelerator physics module is organized since 2003 as a joint venture between the BE Department and Technical Training, and is open to a wider CERN community. The AXEL-2012 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) from the 16th – 20th of January 2012, and given in English with ...

Technical training: AXEL-2011 - Introduction to Particle Accelerators

CERN Multimedia

HR Department

2010-01-01

CERN Technical Training 2011: Learning for the LHC! AXEL-2011 is a course series on particle accelerators, given at CERN within the framework of the 2011 Technical Training Program. As part of the BE Department’s Operation Group Shutdown Lecture series, the general accelerator physics module has been organized since 2003 as a joint venture between the BE Department and Technical Training, and is open to a wider CERN community. The AXEL-2011 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is also open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge of accelerators. However, some basic knowledge of trigonometry, matrices and differential equations, and some basic knowledge of magnetism would be an advantage. The series will be composed of 10 one-hour courses (Monday 10.01.2011 – Fri 14.01.2011, from 09:00 to 10:30 and from 14:00 to 15:...

Technical training: AXEL-2006 - Introduction to Particle Accelerators

CERN Multimedia

Davide Vitè

2006-01-01

CERN Technical Training 2006: Learning for the LHC! AXEL-2006 is a course series on particle accelerators, given at CERN within the framework of the 2006 Technical Training Programme. Known in the past as the PS Complex Operation Course (or the 'PS Shutdown Course'), the general accelerator physics module is organised since 2003 as a joint venture between the AB department and Technical Training, and is open to a wider CERN community. The AXEL-2006 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) during the week 6-10 February March 2006, and given in English...

Technical Training: AXEL-2005: Introduction to Particle Accelerators

CERN Multimedia

Monique Duval

2005-01-01

CERN Technical Training 2005: Learning for the LHC! AXEL-2005 is a course series on particle accelerators, given at CERN within the framework of the 2005 Technical Training Programme. Known in the past as the PS Complex Operation Course (or the 'PS Shutdown Course', now AB/OP), the general accelerator physics section is organised since 2003 as a joint venture between the AB department and Technical Training, and is open to a wider CERN community. The AXEL-2005 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to all people (technicians, engineers, physicists) interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) during the week 14-18 March 2005, given in Fr...

Technical training: AXEL-2009 - Introduction to Particle Accelerators

CERN Multimedia

HR Department

2008-01-01

CERN Technical Training 2009: Learning for the LHC! AXEL-2009 is a course series on particle accelerators, given at CERN within the framework of the 2009 Technical Training Program. Known in the past as the PS Complex Operation Course (or the ‘PS Shutdown Course’), the general accelerator physics module is organized since 2003 as a joint venture between the AB department and Technical Training, and is open to a wider CERN community. The AXEL-2009 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) from the 19th – 23rd of January 2009, and given in English with...

Technical training: AXEL-2010 - Introduction to particle accelerators

CERN Multimedia

HR Department

2010-01-01

CERN Technical Training 2010: Learning for the LHC! AXEL-2010 is a course series on particle accelerators, given at CERN within the framework of the 2010 Technical Training Program. Known in the past as the PS Complex Operation Course (or the ‘PS Shutdown Course’), the general accelerator physics module is organized since 2003 as a joint venture between the BE department and Technical Training, and is open to a wider CERN community. The AXEL-2010 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) from the 1st – 5th of February 201...

The CERN Neutrino Platform

CERN Document Server

Bordoni, Stefania

2018-01-01

The long-baseline neutrino programme has been classified as one of the four highest-priority sci- entific objectives in 2013 by the European Strategy for Particle Physics. The Neutrino Platform is the CERN venture to foster and support the next generation of accelerator-based neutrino os- cillation experiments. Part of the present CERN Medium-Term Plan, the Neutrino Platform provide facilities to develop and prototype the next generation of neutrino detectors and contribute to unify the European neu- trino community towards the US and Japanese projects. A significative effort is made on R&D; for LAr TPC technologies: two big LAr TPC prototypes for the DUNE far detector are under con- struction at CERN. Those detectors will be exposed in 2018 to an entirely new and NP-dedicated beam-line from the SPS which will provide electron, muon and hadron beams with energies in the range of sub-GeV to a few GeV. Other projects are also presently under development: one can cite the refurbishing and shipping to the US ...

CERN: an aerial view

CERN Multimedia

2004-01-01

On 30th January, when CERN still resembled a winter wonderland, a helicopter with a photographer on board took off on an aerial tour. One sunny morning at the end of January, when the area was waking up to an overnight snowfall, a helicopter took off from the Meyrin site with a CERN photographer on board. CERN has been the subject of aerial photographs ever since its creation. Although its appearance has changed over the years, the Laboratory has aged well. The aerial photographs taken during its fifty-year history bear witness to its expansion, showing how a handful of buildings and a first accelerator have blossomed into an entire machine complex. Let's take to the skies and have a look at some of the photos taken on this crisp January morning: a sight for sore eyes! In the foreground, Building 40 on the Meyrin site is recognisable from its magnet shape.On the right of the Route de Meyrin (crossing the photo diagonally), next to Point 1, the work on the Globe of Innovation, which got underway at the beg...

26th May 2011 -Delegate to CERN Open Council sessions and European Commission Head of Unit for Joint Programming European Research Area, DG Research and Innovation R. Lečbychová visiting the CERN Control Centre with M. Pojer, accompanied by CERN S. Stavrev.

CERN Multimedia

Maximilien Brice

2011-01-01

26th May 2011 -Delegate to CERN Open Council sessions and European Commission Head of Unit for Joint Programming European Research Area, DG Research and Innovation R. Lečbychová visiting the CERN Control Centre with M. Pojer, accompanied by CERN S. Stavrev.

Progress report on CERN activities (June 1981)

International Nuclear Information System (INIS)

Schopper, H.

1981-01-01

A selection of subjects illustrates the results obtained at CERN, especially during the first half-year of 1981. The report deals mainly with the development of installations for the storage and the acceleration of antiprotons and for the realization of collisions between beams of antiprotons and protons. The other developments of accelerators and particle detectors are equally mentioned. Thereafter the general aspect of our actual knowledge of the constituents of matter and the forces acting between them is analyzed. This framework is used for the presentation of the experimental results obtained at CERN. The evoked questions include the tests of the quark-parton model, the properties of the new particles containing charmed or beauty quarks, the studies of the structure of the nucleon, the tests of quantum chromodynamics (QCD), and the research on the weak interaction. (HSI)

CERN and 60 years of science for peace

Energy Technology Data Exchange (ETDEWEB)

Heuer, Rolf-Dieter, E-mail: Rolf.Heuer@cern.ch [CERN, CH-1211 Geneva (Swaziland)

2015-02-24

This paper presents CERN as it celebrates its 60{sup th} Anniversary since its founding. The presentation first discusses the mission of CERN and its role as an inter-governmental Organization. The paper also reviews aspects of the particle physics research programme, looking at both current and future accelerator-based facilities at the high-energy and intensity frontiers. Finally, the paper considers issues beyond fundamental research, such as capacity-building and the interface between Art and Science.

CERN: Energy amplifier

International Nuclear Information System (INIS)

Anon.

1995-01-01

Even under the heavy burden of responsibility as CERN's Director General from 1989-3 the fertile mind of Carlo Rubbia the scientist was never still. A long-time Rubbia 'hobby' has been the search for new sources of nuclear energy, exploiting knowledge and skills from high energy physics. An initial objective was to adopt heavy ion techniques to induce controlled thermonuclear fusion, but in 1994 this quest changed direction. Putting the problems of thermonuclear fusion aside, Rubbia began to explore an alternative route to energy production through controlled nuclear fission. The idea is to use a particle accelerator producing neutrons by spallation (interaction of particles with a target) to feed a fuel/moderator assembly where the neutrons multiply by fission chain reactions. If the energy liberated becomes substantially greater than that needed to drive the accelerator, the process has a net gain and becomes selfsupporting. Hence the name ''Energy Amplifier'' (EA). Similar systems for energy production or for nuclear waste incineration have been proposed at Los Alamos and in Japan and Russia, but appear to require the prior development of innovative linear accelerators. For Rubbia's Amplifier, the requisite accelerator is a reasonable extrapolation of an existing cyclotron such that at the Swiss Paul Scherrer Institute. Moreover, the EA would require fuel rods very similar to those of conventional reactors, rather than demand-ing new technology using liquid fuel loops (molten salts) with on-line separation of radioactive products. Unlike a reactor, the EA's fission reaction is not self-sustaining: it is sub-critical and needs a continuous supply of neutrons from the accelerator. This makes Chernobyl-type meltdowns unlikely: if the accelerator stops, the reaction stops too. Another major advantage is that the old dream of using thorium as a fuel is now made possible. Thorium is not itself fissile, but under neutron

People and things. CERN Courier, October 1982, v. 22(8)

International Nuclear Information System (INIS)

Anon.

1982-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. Some two hundred delegates from several different countries met for the History of Particle Physics Colloquium held in Paris in the old Ecole Polytechnique building from 21-23 July 1982. The fourth meeting of the USA/ Japan Committee on High Energy Physics was held on 24-25 May in the Fuji Institute of Education and Training in the foothills of Mt. Fuji. Earlier this year, a seminar entitled Trends in Particle Acceleration Techniques' was held in Capri, Italy.The 1983 Particle Accelerator Conference on Accelerator Engineering and Technology will be held from 21-23 March at Santa Fe, New Mexico, organized by Los Alamos National Laboratory. A Workshop on SPS Fixed Target Physics for the years 1984-89 will be held at CERN from 6-10 December. Data from recent deuterium fills of the BEBC bubble chamber at CERN and the Fermilab 15 foot chamber, exposed to wideband neutrino beams, has provided information on the coupling of the weak neutral current to neutrons. The results are in tune with electroweak predictions

Stephen Myers - More collaboration for accelerators

CERN Multimedia

2009-01-01

Stephen Myers has been appointed Director of Accelerators and Technology. His highest priority is to get the LHC running this year, but beyond that he also has the difficult task of balancing resources between non-LHC physics, new projects and consolidation of the existing accelerators. Stephen Myers, previous head of the Accelerator and Beams (AB) Department, will now oversee all the accelerator and technology activities at CERN, including the Beams, Technology and Engineering departments, in the re-established position of Director of Accelerators and Technology. "There are several good reasons to have a single person responsible for the CERN accelerators and technology," said Myers. "Most importantly, this will allow closer collaboration between the three departments and provide the structure for possible redeployment of resources. There will, of course, be regular meetings between the heads of department and myself, and if proble...

CERN Radiation Protection (RP) calibration facilities

CERN Document Server

AUTHOR|(CDS)2082069; Macián-Juan, Rafael

Radiation protection calibration facilities are essential to ensure the correct operation of radiation protection instrumentation. Calibrations are performed in specific radiation fields according to the type of instrument to be calibrated: neutrons, photons, X-rays, beta and alpha particles. Some of the instruments are also tested in mixed radiation fields as often encountered close to high-energy particle accelerators. Moreover, calibration facilities are of great importance to evaluate the performance of prototype detectors; testing and measuring the response of a prototype detector to well-known and -characterized radiation fields contributes to improving and optimizing its design and capabilities. The CERN Radiation Protection group is in charge of performing the regular calibrations of all CERN radiation protection devices; these include operational and passive dosimeters, neutron and photon survey-meters, and fixed radiation detectors to monitor the ambient dose equivalent, H*(10), inside CERN accelera...

Research of Virtual Accelerator Control System

Institute of Scientific and Technical Information of China (English)

DongJinmei; YuanYoujin; ZhengJianhua

2003-01-01

A Virtual Accelerator is a computer process which simulates behavior of beam in an accelerator and responds to the accelerator control program under development in a same way as an actual accelerator. To realize Virtual Accelerator, control system should provide the same program interface to top layer Application Control Program, it can make 'Real Accelerator' and 'Virtual Accelerator'use the same GUI, so control system should have a layer to hide hardware details, Application Control Program access control devices through logical name but not through coded hardware address. Without this layer, it is difficult to develop application program which can access both 'Virtual' and 'Real' Accelerators using same program interfaces. For this reason, we can create CSR Runtime Database which allows application program to access hardware devices and data on a simulation process in a unified way. A device 'is represented as a collection of records in CSR Runtime Database. A control program on host computer can access devices in the system only through names of record fields, called channel.

People and things. CERN Courier, Apr 1985, v.25(3)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1985-04-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. To commemorate the 25th anniversary of Austria's joining CERN and the forming of the first high energy physics group in the country, a celebration took place last November in the Auditorium of the old University of Vienna. From 25-28 February next year, another (the fourth) Vienna Wire Chamber Conference will take place. The fifth US Summer School on High Energy Particle Accelerators is to be held at the Stanford Linear Accelerator Center from 15-26 July.

People and things. CERN Courier, Apr 1985, v.25(3)

International Nuclear Information System (INIS)

Anon.

1985-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. To commemorate the 25th anniversary of Austria's joining CERN and the forming of the first high energy physics group in the country, a celebration took place last November in the Auditorium of the old University of Vienna. From 25-28 February next year, another (the fourth) Vienna Wire Chamber Conference will take place. The fifth US Summer School on High Energy Particle Accelerators is to be held at the Stanford Linear Accelerator Center from 15-26 July

INTEGRATED OPERATIONAL DOSIMETRY SYSTEM AT CERN.

Science.gov (United States)

Dumont, Gérald; Pedrosa, Fernando Baltasar Dos Santos; Carbonez, Pierre; Forkel-Wirth, Doris; Ninin, Pierre; Fuentes, Eloy Reguero; Roesler, Stefan; Vollaire, Joachim

2017-04-01

CERN, the European Organization for Nuclear Research, upgraded its operational dosimetry system in March 2013 to be prepared for the first Long Shutdown of CERN's facilities. The new system allows the immediate and automatic checking and recording of the dosimetry data before and after interventions in radiation areas. To facilitate the analysis of the data in context of CERN's approach to As Low As Reasonably Achievable (ALARA), this new system is interfaced to the Intervention Management Planning and Coordination Tool (IMPACT). IMPACT is a web-based application widely used in all CERN's accelerators and their associated technical infrastructures for the planning, the coordination and the approval of interventions (work permit principle). The coupling of the operational dosimetry database with the IMPACT repository allows a direct and almost immediate comparison of the actual dose with the estimations, in addition to enabling the configuration of alarm levels in the dosemeter in function of the intervention to be performed. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Design, construction and start up by Air Liquide of two 18 kW at 45 K helium refrigerators for the new CERN accelerator (LHC)

CERN Document Server

Dauguet, P; Delcayre, F; Ghisolfi, A; Gistau-Baguer, Guy M; Guerin, C A; Hilbert, B; Marot, G; Monneret, E

2004-01-01

CERN in Switzerland is presently building a new particle accelerator labeled as the LHC. This 27 km accelerator will, for the first time at such a large scale, operate at cryogenic temperatures with superconducting magnets and radio-frequency cavities. For that purpose, Air Liquide has designed, constructed and started up two custom designed refrigerators. The cryogenic power of each of these refrigerators is equivalent to 18 kW at 4.5 K. In order to produce the cryogenic power requested by the LHC accelerator at the different temperature levels with a very high efficiency, a custom design thermodynamic cycle has been chosen. This cycle, the major components of the refrigerators and the results obtained during the reception tests of the refrigerators are presented in this paper.

CMS Centre at CERN

CERN Multimedia

2007-01-01

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

Multi-platform SCADA GUI Regression Testing at CERN

CERN Document Server

Burkimsher, P C; Klikovits, S

2011-01-01

The JCOP Framework is a toolkit used widely at CERN for the development of industrial control systems in several domains (i.e. experiments, accelerators and technical infrastructure). The software development started 10 years ago and there is now a large base of production systems running it. For the success of the project, it was essential to formalize and automate the quality assurance process. This paper will present the overall testing strategy and will describe in detail mechanisms used for GUI testing. The choice of a commercial tool (Squish) and the architectural features making it appropriate for our multi-platform environment will be described. Practical difficulties encountered when using the tool in the CERN context are discussed as well as how these were addressed. In the light of initial experience, the test code itself has been recently reworked in object-oriented style to facilitate future maintenance and extension. The current reporting process is described, as well as future plans for easy re...

JACoW A new distributed control system for the consolidation of the CERN tertiary infrastructures

CERN Document Server

Scibile, Luigi; Villeton Pachot, Patrick

2018-01-01

The operation of the CERN tertiary infrastructures is carried out via a series of control systems distributed over the CERN sites (Meyrin and Prevessin). The scope comprises: $\\sim$ 260 buildings, 2 large heating plants ($\\sim$ 50 MW overall capacity) with 27 km heating network and 200 radiators circuits, $\\sim$ 500 air handling units, $\\sim$ 52 chillers, $\\sim$ 300 split systems, $\\sim$ 3000 electric boards and $\\sim$ 100k light points. In the last five years and with the launch of major tertiary infrastructure consolidations, CERN is carrying out a migration and an extension of the old control systems dated back to the 70's, 80's and 90's to a new simplified, yet innovative, distributed control system aimed at minimizing the programming and implementation effort, standardizing equipment and methods and reducing lifecycle costs. This new methodology allows for a rapid development and simplified integration of the new controlled building/infrastructure processes. The basic principle is based on open standards...

CERN hosts training event on international management

CERN Multimedia

2007-01-01

CERN held its first training event on international management at the Globe on 2 October, sharing its expertise with high-level Swiss managers as part of their year-long part-time executive training programme on advanced management. CERN is often talked about in terms of impressive statistics: the coldest place in the universe, the largest accelerator, the greatest volume of data. Whilst the science is undeniably remarkable, it is backed by a management infrastructure that has to be as cutting-edge as the research it supports. On 2 October, the Learning and Development section of HR organised an event for 60 delegates to come to CERN to learn about international management from those who have taken on the management challenges at the heart of this unique institution. It was the first time that CERN had prepared such an event. SKU, a non-profit organisation, approached our management training team to arrange the event as part of a wee...

CERN Book Fair 2010 - Events and book presentations

CERN Multimedia

CERN Library

2010-01-01

A series of events and book presentations is scheduled for the 2010 CERN Book Fair.   -Springer will present its new products and services (eBooks, MyCopy Softcover Editions, SpringerBriefs, and a new physics journal: "Historical Perspectives on Contemporary Physics") and SpringerMaterials, the electronic version of the Landolt Boernstein book series. -Wiley will present two books: "A History of International Research Networking : The People who Made it Happen", edited by B. Bressan and H. Davies, and "Field computation for accelerator magnets : analytical and numerical methods for electromagnetic design and optimization" by S. Russenschuck. -Finally, World Scientific will present the series "Reviews of Accelerator Science and Technology (RAST)". The calendar is available here: http://indico.cern.ch/conferenceDisplay.py?confId=105651      

H$^{-}$ ion source for CERN's Linac4 accelerator: simulation, experimental validation and optimization of the hydrogen plasma

CERN Document Server

Mattei, Stefano; Lettry, Jacques

2017-07-25

Linac4 is the new negative hydrogen ion (H$^-$) linear accelerator of the European Organization for Nuclear Research (CERN). Its ion source operates on the principle of Radio-Frequency Inductively Coupled Plasma (RF-ICP) and it is required to provide 50~mA of H$^-$ beam in pulses of 600~$\\mu$s with a repetition rate up to 2 Hz and within an RMS emittance of 0.25~$\\pi$~mm~mrad in order to fullfil the requirements of the accelerator. This thesis is dedicated to the characterization of the hydrogen plasma in the Linac4 H$^-$ ion source. We have developed a Particle-In-Cell Monte Carlo Collision (PIC-MCC) code to simulate the RF-ICP heating mechanism and performed measurements to benchmark the fraction of the simulation outputs that can be experimentally accessed. The code solves self-consistently the interaction between the electromagnetic field generated by the RF coil and the resulting plasma response, including a kinetic description of charged and neutral species. A fully-implicit implementation allowed to si...

Design of a high-precision fast wire scanner for the SPS at CERN

CERN Document Server

Veness, R; Dehning, B; Emery, J; Herranz Alvarez, J; Koujili, M; Samuelsson, S; Sirvent, J-L

2012-01-01

Studies are going on of a new wire scanner concept. All moving parts are inside the beam vacuum and it is specified for use in all the machines across the CERN accelerator complex. Key components have been developed and tested. Work is now focussing on the installation of a prototype for test in the Super Proton Synchrotron (SPS) accelerator. This article presents the specification of the device and constraints on the design for integration in the different accelerators at CERN. The design issues of the mechanical components are discussed and optimisation work shown. Finally, the prototype design, integrating the several components into the vacuum tank is presented.

Equal opportunities group. His mission : accelerating equal opportunities at CERN

CERN Multimedia

Patrice Loïez

2000-01-01

L. to r.: Michel Mayoud, Christine Petit-Jean-Genaz, the Equal Opportunities Officer Sudeshna Datta-Cockerill, Elena Wildner, Anne-Sylvie Cerne, Karl-Heinz Kissler, the Chairman John Ellis and Eva-Maria Groniger-Voss

Behind the scenes of GS: Mapping the future of CERN

CERN Multimedia

Sophie Louise Hetherton

2014-01-01

Focus on the Future Accelerator Studies (FAS) section at CERN who carry out the civil engineering studies for the Laboratory’s future scientific facilities.   The Future Accelerator Studies (FAS) section co-ordinates the civil engineering and infrastructure studies for large-scale future physics projects. These include projects due to complete in a couple of years such as AWAKE, but also projects planned for ten years’ time such as the High Luminosity LHC (HL-LHC) or even longer term projects such as the Future Circular Collider (FCC), for which approval is still pending. “CERN needs to be able to study the feasibility and assess the risks of future projects, even though they are not all fully approved,” explains John Osborne, Head of the FAS section, which also includes two fellows and one technical student. “Our small team works closely with other groups across CERN and with external companies to provide studies from a civil engineering poin...

People and things. CERN Courier, Jul-Aug 1991, v. 31(6)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1991-07-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; The Third European Particle Accelerator Conference (EPAC92) will take place in the reunified city of Berlin, at the Technical University of Berlin, from 24-28 March 1992. ; A special symposium, held at CERN on 2-3 May in memory of distinguished CERN theorist John Bell who died on 1 October last year, attracted prominent physicists from all over the world.

People and things. CERN Courier, Jul-Aug 1991, v. 31(6)

International Nuclear Information System (INIS)

Anon.

1991-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events: ; The Third European Particle Accelerator Conference (EPAC92) will take place in the reunified city of Berlin, at the Technical University of Berlin, from 24-28 March 1992. ; A special symposium, held at CERN on 2-3 May in memory of distinguished CERN theorist John Bell who died on 1 October last year, attracted prominent physicists from all over the world

CERN encourages girls to "expand their horizons"

CERN Document Server

François Briard

2015-01-01

On 14 November, CERN took part for the fourth time in "Élargis tes horizons" (see here), a conference organised every two years at Geneva University for girls from the local region aged 11 to 14 aiming to encourage them to take up studies and careers in the scientific and technical domains.   Claude Sanz (left), a fellow in the EN Department, explaining to three girls how to build a particle accelerator in a salad bowl. This year, young physicists and engineers from ATLAS and CMS ran three workshops: "Seeing the invisible using a cloud chamber", "Great cold fun and treats with liquid nitrogen" and "Build your own accelerator in a salad bowl!" CERN was also represented at the Forum de Découverte, represented by the Diversity Office and the Medialab team, presenting the "Higgnite" interactive experiment, which illustrates the principle of the Higgs field. More...

CAS course on Plasma Wake Acceleration

CERN Multimedia

CERN Accelerator School

2015-01-01

The CERN Accelerator School (CAS) recently organised a specialised course on Plasma Wake Acceleration, held at CERN, Geneva, Switzerland, from 23 to 29 November 2014.    Following a number of introductory lectures on laser and plasma physics, as well as an overview of conventional accelerators and their limitations, the course covered a large number of aspects of plasma wake acceleration schemes: the creation of plasma by high power lasers or particle beams, a description of the plasma creation process through simulations and the characteristics of the accelerated particle beams, including results of the latest achievements. Lectures on beam diagnostics, the applications of plasma accelerated beams, and topical seminars completed the programme.  The course was very successful, with 109 students of 26 nationalities attending; most participants coming from European counties, but also from the US, Israel, India, South Korea, Russia and Ukraine. Feedback from the participants was...

Modernisation of the CERN operational dosimetery system

CERN Multimedia

Caroline Duc

2013-01-01

 As part of continual efforts to ensure the highest standards in the field of Radiation Protection, CERN is modernising its operational dosimetry system.   Pierre Carbonez, head of the Dosimetery and Instrument Calibration Service, with one of the new automatic operational dosimetery reader terminals. No more sheets of paper to record radiation doses at the entrance to the accelerators: the operational dosimetry system is being modernised! Since March, 50 automatic operational dosimeter reader terminals are in operation around the accelerator complex. Operational dosimeters (DMC) complement the "passive" dosimeters (DIS) and must be used every time you enter Controlled Radiation Areas. They measure the dose of radiation received by the exposed worker in real time and give a warning if the acceptable threshold is exceeded. The new dosimeter reader system allows the dosage recording procedure to be automated. “Every pers...

CERN: Towards LEP 200

International Nuclear Information System (INIS)

Anon.

1990-01-01

In March a cryomodule with four superconducting radiofrequency accelerating cavities operated for the first time in CERN's new LEP electron-positron collider, the result of many years of careful research and development work and an important step on the road to boost LEP energies from their initial level around 50 GeV per beam to above the 82 GeV threshold for production of W pairs

CERN: Fixed target targets

International Nuclear Information System (INIS)

Anon.

1993-01-01

Full text: While the immediate priority of CERN's research programme is to exploit to the full the world's largest accelerator, the LEP electron-positron collider and its concomitant LEP200 energy upgrade (January, page 1), CERN is also mindful of its long tradition of diversified research. Away from LEP and preparations for the LHC proton-proton collider to be built above LEP in the same 27-kilometre tunnel, CERN is also preparing for a new generation of heavy ion experiments using a new source, providing heavier ions (April 1992, page 8), with first physics expected next year. CERN's smallest accelerator, the LEAR Low Energy Antiproton Ring continues to cover a wide range of research topics, and saw a record number of hours of operation in 1992. The new ISOLDE on-line isotope separator was inaugurated last year (July, page 5) and physics is already underway. The remaining effort concentrates around fixed target experiments at the SPS synchrotron, which formed the main thrust of CERN's research during the late 1970s. With the SPS and LEAR now approaching middle age, their research future was extensively studied last year. Broadly, a vigorous SPS programme looks assured until at least the end of 1995. Decisions for the longer term future of the West Experimental Area of the SPS will have to take into account the heavy demand for test beams from work towards experiments at big colliders, both at CERN and elsewhere. The North Experimental Area is the scene of larger experiments with longer lead times. Several more years of LEAR exploitation are already in the pipeline, but for the longer term, the ambitious Superlear project for a superconducting ring (January 1992, page 7) did not catch on. Neutrino physics has a long tradition at CERN, and this continues with the preparations for two major projects, the Chorus and Nomad experiments (November 1991, page 7), to start next year in the West Area. Delicate neutrino oscillation effects could become

CERN: Fixed target targets

Energy Technology Data Exchange (ETDEWEB)

Anon.

1993-03-15

Full text: While the immediate priority of CERN's research programme is to exploit to the full the world's largest accelerator, the LEP electron-positron collider and its concomitant LEP200 energy upgrade (January, page 1), CERN is also mindful of its long tradition of diversified research. Away from LEP and preparations for the LHC proton-proton collider to be built above LEP in the same 27-kilometre tunnel, CERN is also preparing for a new generation of heavy ion experiments using a new source, providing heavier ions (April 1992, page 8), with first physics expected next year. CERN's smallest accelerator, the LEAR Low Energy Antiproton Ring continues to cover a wide range of research topics, and saw a record number of hours of operation in 1992. The new ISOLDE on-line isotope separator was inaugurated last year (July, page 5) and physics is already underway. The remaining effort concentrates around fixed target experiments at the SPS synchrotron, which formed the main thrust of CERN's research during the late 1970s. With the SPS and LEAR now approaching middle age, their research future was extensively studied last year. Broadly, a vigorous SPS programme looks assured until at least the end of 1995. Decisions for the longer term future of the West Experimental Area of the SPS will have to take into account the heavy demand for test beams from work towards experiments at big colliders, both at CERN and elsewhere. The North Experimental Area is the scene of larger experiments with longer lead times. Several more years of LEAR exploitation are already in the pipeline, but for the longer term, the ambitious Superlear project for a superconducting ring (January 1992, page 7) did not catch on. Neutrino physics has a long tradition at CERN, and this continues with the preparations for two major projects, the Chorus and Nomad experiments (November 1991, page 7), to start next year in the West Area. Delicate neutrino oscillation effects could become visible for the first

CERN pursues its partnership with the Department of Haute-Savoie

CERN Multimedia

CERN Bulletin

2010-01-01

The third framework agreement between CERN and the Department of Haute-Savoie was signed at an official ceremony in Archamps, Haute Savoie, on 4 February 2010. The main theme of the agreement, which lays down the guidelines for collaboration between the two parties, is the transfer of knowledge and technology.   Christian Monteil (left), Chairman of the General Council of Haute-Savoie and Rolf Heuer, Director-General of CERN after the third signature of the convention-cadre between Haute-Savoie and CERN. CERN and Haute Savoie have a long tradition of cooperation. Fourteen years after their first agreement (see box), the two parties have just signed a third framework agreement that adds knowledge transfer to the range of items covered. The Department of Haute-Savoie wishes to place the focus on advanced and unique training in areas where CERN has considerable expertise. "Two highly successful schools in which CERN is directly involved, one on accelerator physics and the other on medical ap...

AXEL-2015 - Introduction To Particle Accelerators | starting 19 January

CERN Multimedia

2014-01-01

CERN Technical Training 2015: Learning for the LHC AXEL-2015 is a lecture series on particle accelerators, given at CERN within the framework of the 2014 Technical Training Programme. As part of the BE Department’s Operations Group Shutdown Lecture series, the general accelerator physics module has been organised since 2003 as a joint venture between the BE Department and Technical Training, and is open to the general CERN community. The AXEL-2015 course is designed for technicians who are operating an accelerator or whose work is closely linked to accelerators, but it is also open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge of accelerators. However, some basic knowledge of trigonometry, matrices and differential equations and some basic knowledge of magnetism would be an advantage. The series will consists of 10 one-hour sessions (Monday 19 January 2015 – Friday 23 January 2015, from 9 a.m. to 10.15 a.m. and ...

CHANGE@CERN:Task Force 4: Matching personnel to activities

CERN Multimedia

2002-01-01

Our series on the work of the Task Forces moves on to Human Ressources at CERN. Staff mobility and topics related to contract policy were the main personnel issues to be considered by Task Force 4, led by John Ferguson, head of AS Division. The aim, as with the other Task Forces, was to find ways to focus resources on the LHC, and once again the recommendations recognise the opportunity to make constructive changes, in this case in Human Resources policy at CERN. Movement of staff between divisions at CERN has generally not been easy, with 'staff complements' (total numbers) set for each sector (research, accelerator, technical and administration). However, the restructuring of the accelerator sector (proposed by Task Force 5 and already agreed in principle) should allow some staff to move to LHC activities. More generally, Task Force 4 recommends that the Laboratory carries out a review of all activities, at a relatively detailed level, so as to identify the resources required to achieve specific goals (t...

This summer, go behind-the-scenes of CERN in photos in the Microcosm

CERN Multimedia

2016-01-01

Find out the best photos of the 2015 CERN Photowalk competition in the Microcosm.   Photo: Olivier Miche. The best photos taken at the 2015 CERN Photowalk competition are now exhibited in the Microcosm, for the whole summer period. Through this photographic exhibition, the visitors will be taken behind-the scenes of CERN, through the main workshop, the ISOLDE facility and the future accelerator Linac 4. They will also take a glimpse of the life on the CERN campus.

CERN confident of LHC start-up in 2007

CERN Document Server

2007-01-01

"Delegates attending the 140th meeting of CERN Council heard a confident report from the Laboratory about the scheduled start-up of the world's highest energy particle accelerator, the Large Hadron Collier (LHC), in 2007." (1 page)

CERN Takes a Bow at the Montreux Jazz Festival

CERN Multimedia

CERN Bulletin

2013-01-01

A year after CERN announced the discovery of a Higgs boson on the world stage, several of the participating scientists found themselves in a new and unfamiliar arena – the renowned Montreux Jazz Festival.   The Canettes Blues Band of the CERN Music Club performing live on the Music In The Park stage at the Montreux Jazz Festival, on 18 July. CERN and the Montreux Jazz Foundation teamed up this summer to host a series of seminars and performances titled “The Physics of Music and the Music of Physics”.  The seminars took place in the historic Petit Palais and included a variety of presentations on the interplay between science and sound. Sound artist Bill Fontana kicked off the series by presenting the concepts and methods behind the creation of  “sound sculptures”.  As the current Collide@CERN artist-in-residence, Fontana has been placing microphones and sensors on accelerators, detectors and other objects at CERN t...

Record transfer of data between CERN and California

CERN Multimedia

Maximilien Brice

2003-01-01

On 27 February 2003 the California Institute of Technology (Caltech), CERN, the Los Alamos National Laboratory (LANL) and the Stanford Linear Accelerator Center (SLAC) broke a data transfer record by transmitting 1 terabyte of data in less than an hour across the 10,000 kilometres between CERN and Sunnyvale in California. The team sustained a transmission rate of 2.38 gigabits per second for over an hour, which is equivalent to transferring 26 CDs per minute. The record-breaking performance was achieved in the framework of tests directly linked to the DataGrid project, which involves the creation of a network of distributed computers able to deliver the unprecedented computing power and data management capacity that will be needed by the data-intensive experiments at the LHC. CERN's participation in these high-speed data transfer tests is led by IT division's External Networking team in the framework of the CERN-led European DataTAG project. Pictured here are some of the members of the CERN DataTAG project te...

EPAC impact (European Particle Accelerator Conference report)

International Nuclear Information System (INIS)

Clarke, Jim

1994-01-01

Acurtain rose on the current world accelerator stage at the end of June when almost 750 delegates gathered in London for the fourth biennial European Particle Accelerator Conference (EPAC). As well as reports from all major Laboratories on their latest accelerator achievements and future plans, a special session featured invited contributions on high intensity issues while a seminar covered the increasing transfer of technology between Accelerator Laboratories and Industry. The first invited talk of the conference, by CERN Director General Chris Llewellyn Smith, concerned the future of high energy physics in Europe. Naturally this focused on the Large Hadron Collider project at CERN, which will open up important new physics frontiers for the 21st century

People and things. CERN Courier, Dec 1987, v. 27(10)

International Nuclear Information System (INIS)

Anon.

1987-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events:; The third symposium 'Astronomy, Cosmology and Fundamental Physics' organized by CERN and ESO (European Southern Observatory) will be held in Bologna, Italy, from 16-18 May on the special occasion of the ninth centenary of the University of Bologna. At CERN, a prototype superconducting accelerating cavity of the type envisaged for LEP beams has been installed for tests in the SPS ring, where it helped take an electron beam to 18 GeV

People and things. CERN Courier, Dec 1987, v. 27(10)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1987-12-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events:; The third symposium 'Astronomy, Cosmology and Fundamental Physics' organized by CERN and ESO (European Southern Observatory) will be held in Bologna, Italy, from 16-18 May on the special occasion of the ninth centenary of the University of Bologna. At CERN, a prototype superconducting accelerating cavity of the type envisaged for LEP beams has been installed for tests in the SPS ring, where it helped take an electron beam to 18 GeV.

Design of a control system for stepper motors with micro-metric precision employed in the beam emittance measurement of the Linac4 at CERN

CERN Document Server

AUTHOR|(CDS)2207212; Dueñas Díaz, José Antonio

A new linear accelerator (Linac4) is being designed to replace its predecessor (Linac2) at CERN. The new Linac4 will double the initial intensity giving an injection energy of up to 160 MeV. It will be an essential component of the LHC (Large Hadron Collider). To assess the quality of the beam, monitoring systems are placed along the beam pipe, being one of them devoted to measure its emittance, the so-called emittance scanner. The measurement of the emittance is important since it constitutes one of the two main parameters that limits the overall LHC performance, being the other parameter the energy of the beam. While the energy level of the beam can be modified during different phases at CERN, the beam emittance cannot; it is determined by the first source that produces the beam. The beam emittance directly influences the amount of particles colliding. For this purpose, the Linac4 emittance scanner will be placed on the very first step of the whole CERN accelerator complex right after the particles sour...

Radiation protection activities around the CERN accelerators

International Nuclear Information System (INIS)

Fasso, A.

1996-01-01

In 1995 several operational circumstances required careful watching by the Radiation Protection Group. Most of these were linked with new or recently started CERN activities: for instance the increasing importance assumed by ISOLDE operation and the breakdowns encountered which have given rise to contamination of the target region and to activity releases. In the SPS ring, several difficulties were brought about by a toilsome installation of a new interlock system, while lead ion operation marked the end of the year, as usual, with higher radiation levels in the SPS experimental areas, despite the fact that existing shielding had been improved. Also at the end of the year, the increase of LEP beam energy to 68 GeV caused a rise of dose rate levels from synchrotron radiation. This was expected, but studies are still needed to assess the full implications for different aspects of radiation protection. On the other hand, the ageing of magnet coils and other equipment (insulators, cables, flexible pipes), aggravated by the high proton beam intensities, has resulted in an increasing frequency of failures (mainly water leaks) both at the PS and at the SPS. If the apparent trend is confirmed, difficulties could be expected in the future for two reasons: the shortage of specialized staff, some of them approaching the CERN dose limit of 15 mSv annually, who can be assigned to repair work; and the lack of spare parts to replace the damaged items. Luckily, the long cooling times following high intensity proton runs provided by the operation with heavy-ions and by the winter shutdown mitigate this situation

Technical training: AXEL-2008 - Introduction to Particle Accelerators

CERN Multimedia

2008-01-01

CERN Technical Training 2008: Learning for the LHC! AXEL-2008 is a course series on particle accelerators, given at CERN within the framework of the AB Operation Group Shut-down Lectures. Since 2003, this course has been organized as a joint venture between the AB Department and Technical Training and is open to a wider CERN community. The AXEL-2008 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is also open to technicians, engineers and physicists interested in this field. The course does not require any prior knowledge of accelerators. However, some basic knowledge of trigonometry, matrices and differential equations and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) from 29th January to 1st February 2008, and given in English with questions and answers als...

Technical training: AXEL-2008 - Introduction to Particle Accelerators

CERN Multimedia

2008-01-01

CERN Technical Training 2008: Learning for the LHC! AXEL-2008 is a course series on particle accelerators, given at CERN within the framework of the AB Operation Group Shut-down Lectures. Since 2003, this course is organized as a joint venture between the AB department and Technical Training, and is open to a wider CERN community. The AXEL-2008 course series is designed for technicians who are operating an accelerator, or whose work is closely linked to accelerators, but it is open to technicians, engineers, and physicists interested in this field. The course does not require any prior knowledge on accelerators. However, some basic knowledge on trigonometry, matrices and differential equations, and some basic notions of magnetism would be an advantage. The course series will be composed of 10 one-hour lectures (mornings and afternoons) from the 29th of January to the 1st February 2008, and given in English with questions and answers also possible in French. The lecturer is Rende Steerenberg, engineer and sup...

Preserving CERN's legacy

CERN Multimedia

Antonella Del Rosso

2015-01-01

At CERN, scientists from all over the world design and build innovative instruments to be implemented in the cutting-edge machines used in high-energy physics. Those instruments go on to become part of the world’s most powerful accelerators, Nobel-prize-winning detectors, unique antimatter machines, the first web servers… These are historical pieces and belong to our common heritage. But, what happens to them once they are no longer in use?   New endeavours consistently require new technical developments, and the list of “old” objects belonging to a laboratory like CERN increases over time. As innovative as they might have been when they were created, they are often bulky, sometimes very delicate, and do not always look like everyday tools when they are dismantled. How best to deal with them? “A database of objects suitable for scientific exhibitions has been available on CDS for many years,” says Gigi Rolandi, Chair of CER...

Upgrade of the Cryogenic CERN RF Test Facility

CERN Document Server

Pirotte, O; Brunner, O; Inglese, V; Koettig, T; Maesen, P; Vullierme, B

2014-01-01

With the large number of superconducting radiofrequency (RF) cryomodules to be tested for the former LEP and the present LHC accelerator a RF test facility was erected early in the 1990’s in the largest cryogenic test facility at CERN located at Point 18. This facility consisted of four vertical test stands for single cavities and originally one and then two horizontal test benches for RF cryomodules operating at 4.5 K in saturated helium. CERN is presently working on the upgrade of its accelerator infrastructure, which requires new superconducting cavities operating below 2 K in saturated superfluid helium. Consequently, the RF test facility has been renewed in order to allow efficient cavity and cryomodule tests in superfluid helium and to improve its thermal performances. The new RF test facility is described and its performances are presented.

Upgrade of the cryogenic CERN RF test facility

International Nuclear Information System (INIS)

Pirotte, O.; Benda, V.; Brunner, O.; Inglese, V.; Maesen, P.; Vullierme, B.; Koettig, T.

2014-01-01

With the large number of superconducting radiofrequency (RF) cryomodules to be tested for the former LEP and the present LHC accelerator a RF test facility was erected early in the 1990’s in the largest cryogenic test facility at CERN located at Point 18. This facility consisted of four vertical test stands for single cavities and originally one and then two horizontal test benches for RF cryomodules operating at 4.5 K in saturated helium. CERN is presently working on the upgrade of its accelerator infrastructure, which requires new superconducting cavities operating below 2 K in saturated superfluid helium. Consequently, the RF test facility has been renewed in order to allow efficient cavity and cryomodule tests in superfluid helium and to improve its thermal performances. The new RF test facility is described and its performances are presented

Heavy ion physics at CERN

International Nuclear Information System (INIS)

Vesztergombi, G.

1991-01-01

A summary of the present status and future plans for heavy ion experiments at CERN-SPS and CERN-LHC accelerators is given. The planned three phases give possibilities to study the properties of the quark-gluon-plasma (QGP). At the present stage the feasibility of high energy ion-ion experiments with their very abundant secondary hadron production, shows that there is a chance to obtain high densities, and to look for the onset of new, collective phenomena. In a second phase, there should be a chance to obtain more conclusive evidence for the onset of quark deconfinement. In the third stage, the average energy densities rise above the deconfinement threshold, so that a study of the properties of QGP should become possible. (G.P.)

People and things. CERN Courier, March 1982, v. 22(2)

International Nuclear Information System (INIS)

Anon.

1982-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. From 3-6 May, a 'Workshop on Accelerator Orbit and Particle Tracking Programs' will be held at Brookhaven. The focus will be primarily on computer simulation of non-linear magnetic effects as they influence beam lifetime in storage rings.The 1982 CERN School of Computing will be held from 29 August to 11 September in Zinal, Valais, Switzerland. This will be the seventh such school and will cover topics of current interest in computing which are relevant to data processing needs in high energy physics. This year marks the fiftieth anniversary of the discovery of the neutron by Sir James Chadwick. To commemorate the event, the UK Institute of Physics, in collaboration with the UK Atomic Energy Research Establishment at Harwell, is organizing an international conference at Cambridge from 13-17 September. The layout of the proposed Stanford Linear Collider SLC has been changed for environmental reasons. A workshop on physics with low energy cooled antiprotons at the new LEAR ring, currently under construction at CERN, will be held at Erice, Sicily, from 9-16 May. To stimulate interest in the problems of particle acceleration to the multi-TeV range, ECFA is organizing a meeting to review the limitations and prospects of both conventional and novel particle acceleration techniques. The 1982 CERN School of Physics will take place in Cambridge, UK, from 5-18 September

Beam Transfer Line Design for a Plasma Wakefield Acceleration Experiment (AWAKE) at the CERN SPS

CERN Document Server

Bracco, C; Brethoux, D; Clerc, V; Goddard, B; Gschwendtner, E; Jensen, L K; Kosmicki, A; Le Godec, G; Meddahi, M; Muggli, P; Mutin, C; Osborne, O; Papastergiou, K; Pardons, A; Velotti, F M; Vincke, H

2013-01-01

The world’s first proton driven plasma wakefield acceleration experiment (AWAKE) is presently being studied at CERN. The experimentwill use a high energy proton beam extracted from the SPS as driver. Two possible locations for installing the AWAKE facility were considered: the West Area and the CNGS beam line. The previous transfer line from the SPS to the West Area was completely dismantled in 2005 and would need to be fully re-designed and re-built. For this option, geometric constraints for radiation protection reasons would limit the maximum proton beam energy to 300 GeV. The existing CNGS line could be used by applying only minor changes to the lattice for the final focusing and the interface between the proton beam and the laser, required for plasma ionisation and bunch-modulation seeding. The beam line design studies performed for the two options are presented.

Has CERN made the stuff of the newborn universe?

CERN Multimedia

Taubes, G

1997-01-01

Researchers at CERN report indications that they have recreated quark-gluon plasma in their Super Proton Synchrotron particle accelerator. The evidence involves the disappearance of of J/psi particles in lead-lead collisions.

CERN confident of LHC start-up in 2007

CERN Document Server

Vanden Broeck, Renilde

2007-01-01

"Delegates attending the 140th meeting of CERN Council today heard a confident report from the Laboratory about the scheduled start-up of the world's highest energy particle accelerator, the Large Hadron Collier (LHC) in 2007. (1/2 page)

CERN confident of LHC start-up in 2007

CERN Multimedia

2006-01-01

"Delegates attending the 140th meeting of CERN Council today heard a confident report from the Laboratory about the scheduled start-up of the world's highest energy particle accelerator, the Large Hadron Collider (LHC) in 2007." (1/2 page)

Large graph visualization of millions of connections in the CERN control system network traffic: analysis and design of routing and firewall rules with a new approach

CERN Document Server

Gallerani, Luigi

2015-01-01

Abstract The CERN Technical Network (TN) TN was intended to be a network for accelerator and infrastructure operations. However, today, more than 60 million IP packets are routed every hour between the General Purpose Network (GPN) and the TN, involving more than 6000 different hosts. In order to improve the security of the accelerator control system, it is fundamental to understand the network traffic between the two networks and to define new appropriate routing and firewall rules without impacting operations. The complexity and huge size of the infrastructure and the number of protocols and services involved, have discouraged for years any attempt to understand and control the network traffic between the GPN and the TN. In this paper, we show a new way to solve the problem graphically. Combining the network traffic analysis with the use of large graph visualization algorithms we produced usable 2D large color topology maps of the network identifying the inter-relations of the control system machines and s...

First ‘Gentner Doktor’ finishes PhD at CERN

CERN Multimedia

Jordan Juras

2011-01-01

In 2007, the CERN Doctoral Student Programme saw the addition of the Gentner Doctoral Student Programme, named in honour of the celebrated nuclear physicist, Wolfgang Gentner. Four years later, on 22 June 2011, Marcel Schuh finished his PhD with a thesis in the field of accelerator technology and became the very first ‘Gentner Doktor’.   Marcel Schuh, first 'Gentner Doktor', celebrates completing his PhD. (Photo by Carsten P. Welsch) Marcel Schuh became a Gentner student in April 2008, after completing a physics degree in 2007 at the University of Heidelberg. His thesis allowed him to gain exposure to CERN and the LHC, as he worked on monitoring and control systems for trigger and readout electronics on the ALICE detector at the LHC. With the support of university supervisor, Carsten P. Welsch, Schuh applied for a Gentner Doctoral Studentship on the Superconducting Proton Linac (SPL) project. “My task was to evaluate whether dedicated higher order mode (HOM) coupler...

Operational experience with the CERN hadron linacs

International Nuclear Information System (INIS)

Charmot, H.; Dutriat, C.; Hill, C.E.; Langbein, K.; Lombardi, A.M.; O'Neil, M.; Tanke, E.; Vretenar, M.

1996-01-01

The present CERN proton linac (Linac2) was commissioned in 1978 and since that date has been the primary source of protons to the CERN accelerator complex. During the past 18 years, the machine has had a very good reliability record in spite of the demands made upon it. Modifications have been made with the view of maintaining this reliability with reduced resources and new requirements from the users. Further demands will be made in the future for LHC operation. In 1994, a new linac for heavy ion production was put into service replacing the original CERN proton linac. As this machine was built within an international collaboration, operation had to take into account the novelty of the techniques used and the variety of equipment supplied by outside collaborators. Even so, the new machine has also had very good reliability. (author)

Domain Specific Language for Magnetic Measurements at CERN

CERN Document Server

Petrone, C

2009-01-01

CERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centres for scientific research. Founded in 1954, the CERN Laboratory sits astride the Franco–Swiss border near Geneva. It was one of Europe’s first joint ventures and now has 20 Member States. Its main purpose is fundamental research in partcle physics, namely investigating what the Universe is made of and how it works. At CERN, the design and realization of the new particle accelerator, the Large Hadron Collider (LHC), has required a remarkable technological effort in many areas of engineering. In particular, the tests of LHC superconducting magnets disclosed new horizons to magnetic measurements. At CERN, the objectively large R&D effort of the Technolgy Department/Magnets, Superconductors and Cryostats (TE/MSC) group identified areas where further work is required in order to assist the LHC commissioning and start-up, to provide continuity in the instrumentation for the LHC magnets maintenance,...

Exchange of equipment between CERN and JINR

CERN Multimedia

CERN Bulletin

2010-01-01

The drift chambers of the former NA48 experiment have recently left CERN to be installed in the MPD experiment at the future NICA accelerator in Dubna, Russia. As a counterpart, the JINR Laboratory will produce drift chambers for the new NA62 experiment. This operation is a fruitful exchange of technology that profits both laboratories and enhances their collaboration.   On 22 July, in the occasion of the departure of the chambers from CERN, Mikhail Itkis (centre), acting Director of the JIINR visited the NA62 experimental area accompanied by Rolf Heuer (left), CERN Director General and Ferdinand Hahn, NA62 technical Co-ordinator. The NA48 drift chambers were overhauled in 2000 and employed until 2008. With a total of 110 kilometres of wire soldered to a very high degree of precision, the four drift chambers were a crucial element of the experimental kaon programme at CERN. The chambers are now moving to a new challenge as they will be re-used by the Multi Purpose Detector (MPD) experiment, under...

President of the Slovak Republic visits CERN

CERN Multimedia

Caroline Duc

2012-01-01

On 11 September 2012, the President of the Slovak Republic, Ivan Gašparovič, visited CERN accompanied by the First Lady and a delegation of 67, including the Deputy Prime Minister, the Minister of Foreign Affairs, the Minister of Economy and the Ambassadors of the Slovak Republic to Switzerland, France and the Office of the United Nations. The visit by representatives of the Slovak Republic follows the Slovak Republic’s hosting of the CERN Accelerator School in the region of Bratislava. After being welcomed to CERN in the morning by CERN Director-General Rolf Heuer, the members of the Slovak government were given the opportunity to get a glimpse of the LHC and to visit the ALICE experiment at Point 2. The President and other members of the Slovak delegation then met representatives of Slovak universities and industries at an exhibition of their work in the hall of Building 500. The President then briefly spoke to Slovak journalists and signed the VIP visitors book. The visit last...

CCLIBS: The CERN Power Converter Control Libraries

CERN Document Server

AUTHOR|(SzGeCERN)404953; Lebioda, Krzysztof Tomasz; Magrans De Abril, Marc; Martino, Michele; Murillo Garcia, Raul; Nicoletti, Achille

2015-01-01

Accurate control of power converters is a vital activity in large physics projects. Several different control scenarios may coexist, including regulation of a circuit’s voltage, current, or field strength within a magnet. Depending on the type of facility, a circuit’s reference value may be changed asynchronously or synchronously with other circuits. Synchronous changes may be on demand or under the control of a cyclic timing system. In other cases, the reference may be calculated in real-time by an outer regulation loop of some other quantity, such as the tune of the beam in a synchrotron. The power stage may be unipolar or bipolar in voltage and current. If it is unipolar in current, it may be used with a polarity switch. Depending on the design, the power stage may be controlled by a firing angle or PWM duty-cycle reference, or a voltage or current reference. All these cases are supported by the CERN Converter Control Libraries (CCLIBS). These open-source C libraries include advanced reference generati...

Damage limits of accelerator equipment

CERN Document Server

Rosell, Gemma

2014-01-01

Beam losses occur in particle accelerators for various reasons. The effect of lost particles on accelerator equipment becomes more severe with the increasing energies and intensities. The present study is focused on the damage potential of the proton beam as a function of particle energy and beam size. Injection and extraction energies of different accelerators at CERN were considered.

JACoW Model learning algorithms for anomaly detection in CERN control systems

CERN Document Server

Tilaro, Filippo; Gonzalez-Berges, Manuel; Roshchin, Mikhail; Varela, Fernando

2018-01-01

The CERN automation infrastructure consists of over 600 heterogeneous industrial control systems with around 45 million deployed sensors, actuators and control objects. Therefore, it is evident that the monitoring of such huge system represents a challenging and complex task. This paper describes three different mathematical approaches that have been designed and developed to detect anomalies in any of the CERN control systems. Specifically, one of these algorithms is purely based on expert knowledge; the other two mine the historical generated data to create a simple model of the system; this model is then used to detect faulty sensors measurements. The presented methods can be categorized as dynamic unsupervised anomaly detection; “dynamic” since the behaviour of the system and the evolution of its attributes are observed and changing in time. They are “unsupervised” because we are trying to predict faulty events without examples in the data history. So, the described strategies involve monitoring t...

1990 CERN School of Physics

International Nuclear Information System (INIS)

1992-01-01

The CERN School of Physics is intended to give young experimental physicists an introduction to the theoretical aspects of recent advances in elementary particle physics. These Proceedings contain reports of lectures on the following topics: Field theory, electroweak theory, physics beyond the Standard Model, QCD, heavy flavours and CP violation, results from LEP experiments, particle accelerator technology, tau charm factories, and the Large Hadron Collider project. (orig.)

Applications of particle accelerators

International Nuclear Information System (INIS)

Barbalat, O.

1994-01-01

Particle accelerators are now widely used in a variety of applications for scientific research, applied physics, medicine, industrial processing, while possible utilisation in power engineering is envisaged. Earlier presentations of this subject, given at previous CERN Accelerator School sessions have been updated with papers contributed to the first European Conference on Accelerators in Applied Research and Technology (ECAART) held in September 1989 in Frankfurt and to the Second European Particle Accelerator Conference in Nice in June 1990. (orig.)

3rd International Conference on Particle Physics Beyond the Standard Model : Accelerator, Non-Accelerator and Space Approaches

CERN Document Server

Beyond The Desert 2002

2003-01-01

The third conference on particle physics beyond the Standard Model (BEYOND THE DESERT'02 - Accelerator, Non-accelerator and Space Approaches) was held during 2--7 June, 2002 at the Finish town of Oulu, almost at the northern Arctic Circle. It was the first of the BEYOND conference series held outside Germany (CERN Courier March 2003, pp. 29-30). Traditionally the Scientific Programme of BEYOND conferences, brought into life in 1997 (see CERN Courier, November 1997, pp.16-18), covers almost all topics of modern particle physics (see contents).

People and things. CERN Courier Nov 1985, v. 25(9)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1985-11-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The European Committee for Future Accelerators (ECFA) meets in plenary session twice a year. At the meeting at CERN earlier this year, ECFA Chariman Jean Sacton described the trend towards even greater internationalization of partide physics research and how arrangement have been completed to allow the exchange of observers between meetings of Plenary ECFA and the US High Energy Physics Advisory Panel (HEPAP). After the success of the ESO (European Southern Observatory) CERN Symposium on Cosmology, Astronomy and Fundamental Physics, held at CERN in November 1983, the second Symposium is to be held at ESO, Garching bei Munchen, West Germany, from 17 to 21 March next year.

People and things. CERN Courier Nov 1985, v. 25(9)

International Nuclear Information System (INIS)

Anon.

1985-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The European Committee for Future Accelerators (ECFA) meets in plenary session twice a year. At the meeting at CERN earlier this year, ECFA Chariman Jean Sacton described the trend towards even greater internationalization of partide physics research and how arrangement have been completed to allow the exchange of observers between meetings of Plenary ECFA and the US High Energy Physics Advisory Panel (HEPAP). After the success of the ESO (European Southern Observatory) CERN Symposium on Cosmology, Astronomy and Fundamental Physics, held at CERN in November 1983, the second Symposium is to be held at ESO, Garching bei Munchen, West Germany, from 17 to 21 March next year

CERN openlab ‘open day’ marks 15 years of fruitful collaboration

CERN Multimedia

Andrew Purcell

2016-01-01

CERN openlab (see here) is organising an ‘open day’ event on 8-9 June 2016. The event will provide an opportunity to learn about CERN openlab’s work: collaborating with leading ICT companies and research institutes to accelerate the development of cutting-edge solutions for the worldwide LHC community, as well as for wider scientific research.   The event will take place at CERN in the main auditorium, as well as in the upstairs mezzanine area of the main building. It will feature both talks and posters on the achievements of diverse CERN openlab projects over the last year. There will also be hands-on technology demonstrations from companies working with CERN openlab, so that you too can discover the latest ICT innovations. The event marks 15 years since CERN openlab was established. “Since 2001, this unique public-private partnership has worked to ensure that members of CERN’s scientific community have access to the v...

People and things. CERN Courier, May 1987, v. 27(4)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1987-05-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The XIX General Assembly of the International Union of Pure and Applied Physics (IUPAP) is to be held at the US National Academy of Sciences, Washington DC, from 29 September - 3 October. The theme of the scientific programme will be 'Physics in a Technological World', reflecting the IUPAP General Council's aim of emphasizing the role of industrial physics and improving relations between industrial and academic physics. The CERN Accelerator School is organizing in collaboration with BESSY (the Berlin electron synchrotron radiation centre) the second of its biennial two-week courses on advanced accelerator physics.

People and things. CERN Courier, May 1987, v. 27(4)

International Nuclear Information System (INIS)

Anon.

1987-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The XIX General Assembly of the International Union of Pure and Applied Physics (IUPAP) is to be held at the US National Academy of Sciences, Washington DC, from 29 September - 3 October. The theme of the scientific programme will be 'Physics in a Technological World', reflecting the IUPAP General Council's aim of emphasizing the role of industrial physics and improving relations between industrial and academic physics. The CERN Accelerator School is organizing in collaboration with BESSY (the Berlin electron synchrotron radiation centre) the second of its biennial two-week courses on advanced accelerator physics

CAS Introduction to Accelerator Physics in Bulgaria

CERN Multimedia

CERN Bulletin

2010-01-01

The CERN Accelerator School (CAS) and the Institute for Nuclear Research & Nuclear Energy (INRNE – Bulgarian Academy of Sciences) jointly organised a course on Introduction to Accelerators, at the Grand Hotel Varna, Bulgaria, from 19 September to 1 October, 2010.   CERN Accelerator School group photo. The course was extremely well attended with 109 participants representing 34 different nationalities, coming from countries as far away as Australia, Canada and Vietnam. The intensive programme comprised 39 lectures, 3 seminars, 4 tutorials where the students were split into three groups, a poster session where students could present their own work, and 7 hours of guided and private study. Feedback from the participants was extremely positive, praising the expertise and enthusiasm of the lecturers, as well as the high standard and excellent quality of their lectures. For the first time at CAS, the CERN Director-General, Rolf Heuer, visited the school and presented a seminar entitled...

CERN radiation protection (RP) calibration facilities

Energy Technology Data Exchange (ETDEWEB)

Pozzi, Fabio

2016-04-14

Radiation protection calibration facilities are essential to ensure the correct operation of radiation protection instrumentation. Calibrations are performed in specific radiation fields according to the type of instrument to be calibrated: neutrons, photons, X-rays, beta and alpha particles. Some of the instruments are also tested in mixed radiation fields as often encountered close to high-energy particle accelerators. Moreover, calibration facilities are of great importance to evaluate the performance of prototype detectors; testing and measuring the response of a prototype detector to well-known and -characterized radiation fields contributes to improving and optimizing its design and capabilities. The CERN Radiation Protection group is in charge of performing the regular calibrations of all CERN radiation protection devices; these include operational and passive dosimeters, neutron and photon survey-meters, and fixed radiation detectors to monitor the ambient dose equivalent, H*(10), inside CERN accelerators and at the CERN borders. A new state-of-the-art radiation protection calibration facility was designed, constructed and commissioned following the related ISO recommendations to replace the previous ageing (more than 30 years old) laboratory. In fact, the new laboratory aims also at the official accreditation according to the ISO standards in order to be able to release certified calibrations. Four radiation fields are provided: neutrons, photons and beta sources and an X-ray generator. Its construction did not only involve a pure civil engineering work; many radiation protection studies were performed to provide a facility that could answer the CERN calibration needs and fulfill all related safety requirements. Monte Carlo simulations have been confirmed to be a valuable tool for the optimization of the building design, the radiation protection aspects, e.g. shielding, and, as consequence, the overall cost. After the source and irradiator installation

Report of the Los Alamos accelerator automation application toolkit workshop

International Nuclear Information System (INIS)

Clout, P.; Daneels, A.

1990-01-01

A 5 day workshop was held in November 1988 at Los Alamos National Laboratory to address the viability of providing a toolkit optimized for building accelerator control systems. The workshop arose from work started independently at Los Alamos and CERN. This paper presents the discussion and the results of the meeting. (orig.)

People and things. CERN Courier, Jun 1985, v. 25(5)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1985-06-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. To honour one of the greatest physicists of the century, who died last October, and a staunch friend, the International Centre for Theoretical Physics in Trieste has announced the Paul Adrien Dirac Gold Medal Award, to be given annually for highest achievement in theoretical physics. The International Committee for Future Accelerators, ICFA, held its twelfth meeting at the Tata Institute of Fundamental Research, Bombay, on 10 April. The CERN Accelerator School was greatly encouraged by the response to the General Accelerator Physics Course organized last year in collaboration with the Orsay and Saclay Laboratories in France. On 11 March, the International Centre for Theoretical Physics (ICTP) in Trieste paid tribute to the memory of Alfred Kastler, Nobel Laureate for Physics 1966 and Chairman of the ICTP Scientific Council from 1970 to 1982, who died on 7 January 1984.

People and things. CERN Courier, May 1984, v. 24(4)

Energy Technology Data Exchange (ETDEWEB)

Anon.

1984-05-15

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The peak energy collision energy in the PETRA electron-positron ring at the German DESY Laboratory continues to be nudged higher. One of the talking points at last summer's conferences was a new measurement of the mass of the F meson by the CLEO group at the CESR electron-positron ring at Cornell, USA. The CERN Accelerator School, the European Committee for Future Accelerators (ECFA) and the Italian INFN are organizing a workshop on the generation of high fields for particle acceleration to very high energies, to be held at Frascati from 25 September to 1 October. From 23 June to 13 July, a meeting is being organized at Snowmass (Colorado) for the US high energy physics community to help contribute towards the definition of the proposed Superconducting Super Collider (SSC)

People and things. CERN Courier, May 1984, v. 24(4)

International Nuclear Information System (INIS)

Anon.

1984-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The peak energy collision energy in the PETRA electron-positron ring at the German DESY Laboratory continues to be nudged higher. One of the talking points at last summer's conferences was a new measurement of the mass of the F meson by the CLEO group at the CESR electron-positron ring at Cornell, USA. The CERN Accelerator School, the European Committee for Future Accelerators (ECFA) and the Italian INFN are organizing a workshop on the generation of high fields for particle acceleration to very high energies, to be held at Frascati from 25 September to 1 October. From 23 June to 13 July, a meeting is being organized at Snowmass (Colorado) for the US high energy physics community to help contribute towards the definition of the proposed Superconducting Super Collider (SSC)

Parking regulations on the CERN sites

CERN Multimedia

General Infrastructure Services Department

2010-01-01

The site surveillance service is also responsible for supervising compliance with the parking regulations on the CERN site. In that context, it ensures that the following rules are complied with on the CERN car park: Vehicles may not be left on a CERN car park for longer than 5 consecutive working days. However, CERN users are entitled to leave their vehicles parked at CERN for a longer period in the car park near Building 588 , subject to completing the application form "Demande d'autorisation pour un stationnement de longue durée" (application for a long-term parking permit) and sending it to the Reception and Access Control Service (access.surveillance@cern.ch) prior to departure.   Parking spaces, which are in short supply in many crowded areas of the CERN site, must not be occupied by abandoned vehicles/wrecks. The service organizes the disposal of such vehicles. Any CERN users wishing to get rid of a private vehicle parked on one of the CERN car pa...

Changing the Culture at CERN

CERN Multimedia

2002-01-01

'Change at CERN' is a major theme of the Management's draft Mid-Term plan that Director General, Luciano Maiani, presented to the staff on 4 April. One important change is to encourage more openness and better communication between the different sectors at CERN. For its part, the Bulletin is beginning a series of articles about the proposals presented in the draft plan. This week we begin with one aspect of Industrial Services. Future articles will cover the work of all the Task Forces, including such topics as the restructuring of the Accelerator Sector, Locally Recruited Staff, and Earned Value reporting. If you have any proposals for topics that you would like to see on these pages please send your suggestions via the form on the Users' Web Page, 'Suggestions for Change'.

The control system for the CERN proton synchrotron continuous transfer ejection

International Nuclear Information System (INIS)

Bloess, D.; Boucheron, J.; Flander, D.; Grier, D.; Krusche, A.; Ollenhauer, F.; Pearce, P.; Riege, H.; Schneider, G.C.

1978-01-01

This report describes the hardware and the software structure of a stand-alone control system for the continuous transfer ejection from the CERN Proton Synchrotron to the Super Proton Synchrotron. The process control system is built around a PDP 11/40 mini-computer interfaced to the ejection elements via CAMAC. It features automatic failure recovery and real-time process optimization. Performance, flexibility, and reliability of the system is evaluated. (Auth.)

The Scandinavian countries and CERN's large 300 GeV accelerator

International Nuclear Information System (INIS)

Steine, A.O.

1977-01-01

Following introductory chapters on the theme, the source material, the history, organisation and functioning of CERN and the place of nuclear research in the scientific research political landscape of the Scandinavian countries, the preliminary basis for the new 300 GeV synchroton, that it be sited elsewhere than in Switzerland is presented. The discussion as to whether Norway should offer a site is presented, and the reasons for the governments decision to do so given. The Swedish offer is also discussed. The discussions and attitudes in Sweden, Norway and Denmark to the first project are presented in turn, and their reasons for following the British rejection are given. The revised project is also described, and the discussions on this in the three countries are treated in turn. A chapter also describes Finland's relationship to CERN. In the final chapter certain aspects in e.g. the motivation of participants in the discussions are treated. (JIW)

Modern accelerators in ancient Rome

International Nuclear Information System (INIS)

Anon.

1988-01-01

For the first time, the achievements and hopes of the broad European accelerator community were brought together in a European Particle Accelerator Conference, held in Rome in June. Ranging from the vast machines at CERN to the small medical accelerators operating in thousands of hospitals, the programme underlined how modern civilization has benefited from the ability to handle charged particle beams

Modern accelerators in ancient Rome

Energy Technology Data Exchange (ETDEWEB)

Anon.

1988-09-15

For the first time, the achievements and hopes of the broad European accelerator community were brought together in a European Particle Accelerator Conference, held in Rome in June. Ranging from the vast machines at CERN to the small medical accelerators operating in thousands of hospitals, the programme underlined how modern civilization has benefited from the ability to handle charged particle beams.

Preparation of a primary argon beam for the CERN fixed target physics.

Science.gov (United States)

Küchler, D; O'Neil, M; Scrivens, R; Thomae, R

2014-02-01

The fixed target experiment NA61 in the North Area of the Super Proton Synchrotron is studying phase transitions in strongly interacting matter. Up to now they used the primary beams available from the CERN accelerator complex (protons and lead ions) or fragmented beams created from the primary lead ion beam. To explore a wider range of energies and densities a request was made to provide primary argon and xenon beams. This paper describes the results of the setting up and 10 week test run of the Ar(11+) beam from the 14.5 GHz ECR ion source and the linear accelerator (Linac3) at CERN.

Preparation of a primary argon beam for the CERN fixed target physics

Energy Technology Data Exchange (ETDEWEB)

Küchler, D., E-mail: detlef.kuchler@cern.ch; O’Neil, M.; Scrivens, R. [CERN, BE Department, 1211 Geneva 23 (Switzerland); Thomae, R. [iThemba LABS, P.O. Box 722, Somerset West 7130 (South Africa)

2014-02-15

The fixed target experiment NA61 in the North Area of the Super Proton Synchrotron is studying phase transitions in strongly interacting matter. Up to now they used the primary beams available from the CERN accelerator complex (protons and lead ions) or fragmented beams created from the primary lead ion beam. To explore a wider range of energies and densities a request was made to provide primary argon and xenon beams. This paper describes the results of the setting up and 10 week test run of the Ar{sup 11+} beam from the 14.5 GHz ECR ion source and the linear accelerator (Linac3) at CERN.

Le CERN à la quête du GRID

CERN Multimedia

Perrin, Brigitte

2004-01-01

CERN is about to make endless calculations for its new particule accelerator; as there is no enough powerful super-computers, researchers decided to connect together thousands of PC all over the world: the GRID is born, soon it will be as popular as the WEB

Electron beam accelerator energy control system

International Nuclear Information System (INIS)

Sharma, Vijay; Rajan, Rehim; Acharya, S.; Mittal, K.C.

2011-01-01

A control system has been developed for the energy control of the electron beam accelerator using PLC. The accelerating voltage of 3 MV has been obtained by using parallel coupled voltage multiplier circuit. A autotransformer controlled variable 0-10 KV DC is fed to a tube based push pull oscillator to generate 120 Khz, 10 KV AC. Oscillator output voltage is stepped up to 0-300 KV/AC using a transformer. 0-300 KVAC is fed to the voltage multiplier column to generate the accelerating voltage at the dome 0-3 MV/DC. The control system has been designed to maintain the accelerator voltage same throughout the operation by adjusting the input voltage in close loop. Whenever there is any change in the output voltage either because of beam loading or arcing in the accelerator. The instantaneous accelerator voltage or energy is a direct proportional to 0-10 KVDC obtained from autotransformer. A PLC based control system with user settable energy level has been installed for 3 MeV, EB accelerator. The PLC takes the user defined energy value through a touch screen and compares it to the actual accelerating voltage (obtained using resistive divider). Depending upon the error the PLC generates the pulses to adjust the autotransformer to bring the actual voltage to the set value within the window of error (presently set to +/- 0.1%). (author)

Major Refit for CERN's 400 kV Substation (Part of the new control and protection system for the 18 kV side)

CERN Document Server

2001-01-01

The 400 kV substation on the Prévessin site brings in the electricity that powers CERN's accelerators and the majority of the Laboratory's installations. It was originally built in the 1970s for the SPS, and is one of only five privately owned 400 kV sub-stations in France. Three of the others belong to the national railway company, SNCF, supplying the Paris-Marseilles TGV line, the other is at the Cadarache research centre near mouth of the Rhone. After nearly thirty years of service, CERN's substation has just undergone a complete overhaul.

Snapshots of CERN

CERN Multimedia

Rebecca Leam

Art was the language of communication between science and the thousands of visitors attending CERN’s two photographic exhibitions in Italy and Spain in October. The artistic images of CERN’s Nobel Prize winners, Large Hadron Collider (LHC) machinery and detectors raised people's curiosity and helped to promote the understanding of particle physics.   The exhibition “Accelerating Nobels” at Genoa’s 7th Science Festival. The exhibition “Accelerating Nobels” attracted over 600’000 visitors during Genoa’s 7th annual Science Festival. It showed science photographer Volker Steger’s 21 portraits of physics Nobels holding their own impromptu drawings of their best discovery. “The theme of the festival was ‘The Future’. The exhibition illustrated the long history of particle physics discoveries at CERN which all lead to what the LHC is going to find, including probably more ...

Control and performance improvements of a pulse compressor in use for testing accelerating structures at high power

Directory of Open Access Journals (Sweden)

Benjamin Woolley

2017-10-01

Full Text Available New developments relating to compact X-band, SLED-I type pulse compressors being developed at CERN for testing high gradient structures are described. Pulse compressors of interest take rf pulses from one or more high power klystrons with duration typically >1.5  μs and deliver up to 5 times the input power for a shorter duration <250  ns. Time domain models for pulse compressor operation with low level rf (LLRF control have been developed. Input drive amplitude and phase for each pulse is evolved with a control algorithm from the pulse compressor output for previous pulses. The goal is to deliver precise amplitude for pulses to test stands and precise amplitude and phase for pulses to accelerator systems. Control algorithms have been developed and validated experimentally.

"small ACCELERATORS" 24 May - 2 June 2005

CERN Multimedia

2005-01-01

CERN Accelerator School and Kernfysisch Versneller Instituut (KVI) Groningen, the Netherlands announce a course on "Small Accelerators", Hotel Golden Tulip Drenthe, Zeegse, the Netherlands, 24 May - 2 June 2005. This specialised course is dedicated to the physics and the main applications of small accelerators. The course will review the different accelerator types as well as their specificities in terms of accelerator physics.

Fundamental particles Bat 774 at CERN

CERN Document Server

Soppelsa, Francesco

2016-01-01

The book talks about the design and construction of the building 774 at CERN. The building 774 is a unique building both for its architectural value and for its location. Located in front of of the CCC (Control Center) at CERN is the main door of more than 100,000 tourists come visiting CERN each year.

Italy's Prime Minister visits CERN

CERN Multimedia

Stefania Pandolfi

2015-01-01

On Tuesday, 7 July 2015, the Prime Minister of the Italian Republic, Matteo Renzi, visited CERN. He was accompanied by a delegation that included Italy's Minister for Education, University and Research, Stefania Giannini.   From left to right: Fernando Ferroni, President of the Istituto Nazionale di Fisica Nucleare (INFN); Sergio Bertolucci, CERN Director for Research and Scientific Computing; Stefania Giannini, Italy's Minister of Education, University and Research; Matteo Renzi, Prime Minister of the Italian Republic; Fabiola Gianotti, CERN Director-General Designate; Rolf Heuer, CERN Director-General.   The Prime Minister was welcomed by members of the CERN Management together with former CERN Director-General and Senator for Life of the Italian Republic, Carlo Rubbia. After a brief general introduction to CERN’s activities by Rolf Heuer, the Italian delegation visited LHC Point 1. After a tour of the ATLAS control room, they donned helmets to visit th...

1989 CERN-JINR school of physics

International Nuclear Information System (INIS)

1991-01-01

The CERN School of Physics is intended to give young experimental physicists an introduction to the theoretical aspects of recent advances in elementary particle physics. These Proceedings contain reports of lecture series on the following topics: Gauge theories and applications, precision tests of the electroweak theory (in two parts), physics beyond the Standard Model, and the experimental programme at the IHEP accelerator. (orig.)

EXHIBITION: Accelerated Particles

CERN Multimedia

2004-01-01

http://www.cern.ch/cern50/ An exhibition of plastic arts and two evenings of performances by sound and visual artists as part of CERN's fiftieth anniversary celebrations. The fiftieth anniversary of a world famous organization like CERN, an international laboratory specializing in fundamental research, is a cause for celebration. Since March this year, Geneva and neighbouring parts of France have been the venues for a wealth of small and large-scale events, which will continue until November. Given CERN's location in the commune of Meyrin, the ForuMeyrin is hosting two "salons" consisting of an exhibition of plastic arts and evenings of music and visual arts performances with the collective title of "Accelerated Particles". Several works will be exhibited and performed. Salon des matières: An exhibition of plastic arts Until Wednesday 3 November 2004. Tuesdays to Fridays: 4.00 p.m. to 7.00 p.m. Saturdays: 2.00 p.m. to 6.00 p.m. Doors open late on the evening of the performances. Salon des ...

First experience with carbon stripping foils for the 160 MeV H- injection into the CERN PSB

Science.gov (United States)

Weterings, Wim; Bracco, Chiara; Jorat, Louise; Noulibos, Remy; van Trappen, Pieter

2018-05-01

160 MeV H- beam will be delivered from the new CERN linear accelerator (Linac4) to the Proton Synchrotron Booster (PSB), using a H- charge-exchange injection system. A 200 µg/cm2 carbon stripping foil will convert H- into protons by stripping off the electrons. The H- charge-exchange injection principle will be used for the first time in the CERN accelerator complex and involves many challenges. In order to gain experience with the foil changing mechanism and the very fragile foils, in 2016, prior to the installation in the PSB, a stripping foil test stand has been installed in the Linac4 transfer line. In addition, parts of the future PSB injection equipment are also temporarily installed in the Linac4 transfer line for tests with a 160 MeV H- commissioning proton beam. This paper describes the foil changing mechanism and control system, summarizes the practical experience of gluing and handling these foils and reports on the first results with beam.

AXEL-2016: Introduction to Particle Accelerators

CERN Multimedia

2016-01-01

AXEL-2016 is the latest in a yearly lecture series on particle accelerators given at CERN within the framework of the 2016 Technical Training Programme. As part of the BE department's Operation group’s shutdown lecture series, this general accelerator physics module has been offered since 2003 as a joint venture between the BE department and the Technical Training team and is open to the wider CERN community.    The lecturer is Rende Steerenberg, deputy leader of the Operation group and PS section leader. Programme: basic mathematics; transverse optics; lattice calculations; resonances; longitudinal motion; transfer lines, injection and ejection; longitudinal and transverse beam instabilities; colliders. A detailed programme is available on the AXEL-2016 webpage. Target audience: designed for technicians who are operating an accelerator or whose work is closely linked to accelerators, but also open to technicians, engineers and physicists interested i...

New accelerator ideas

International Nuclear Information System (INIS)

Anon.

1985-01-01

In the past, providing higher particle beam energies meant building bigger accelerators. It is now universally accepted that with the current generation of accelerator projects either under construction (such as LEP at CERN) or proposed (such as the Superconducting Super Collider in the US), conventional techniques are reaching their practical limit. With the growing awareness that progress in particle physics requires new methods to accelerate particles, workshops and study groups are being set up across the world to search for ideas for the machines of tomorrow

New accelerator ideas

Energy Technology Data Exchange (ETDEWEB)

Anon.

1985-05-15

In the past, providing higher particle beam energies meant building bigger accelerators. It is now universally accepted that with the current generation of accelerator projects either under construction (such as LEP at CERN) or proposed (such as the Superconducting Super Collider in the US), conventional techniques are reaching their practical limit. With the growing awareness that progress in particle physics requires new methods to accelerate particles, workshops and study groups are being set up across the world to search for ideas for the machines of tomorrow.

People and things. CERN Courier, January-February 1982, v. 22(1)

International Nuclear Information System (INIS)

Anon.

1982-01-01

The article reports on achievements of various people, staff changes and position opportunities within the CERN organization and contains news updates on upcoming or past events. The project to build a large electron- positron storage ring, LEP, at CERN already had the backing of the twelve CERN Member States, but three votes remained subject to conditions. At a CERN Council meeting in December this 'ad referendum' was lifted by the Netherlands, Norway and Sweden. The LEP project thus has the unconditional support of all Member States.New members of the IUPAP International Commission on Particles and Fields have been elected. The International Committee for Future Accelerators (ICFA) held its sixth meeting at Protvino, USSR, on the occasion of the ICFA Workshop on very high field (10 Tesla) superconducting magnets

PHYSICS, SCIENCE POLICY CERN's seven-point strategy for future particle physics

CERN Multimedia

2004-01-01

Better coordinated particle accelerator research, with more powerful technology, are major priorities on the seven-point "to do list" revealed last week by CERN, the world's largest particle physics laboratory

LHC@Home: a BOINC-based volunteer computing infrastructure for physics studies at CERN

Science.gov (United States)

Barranco, Javier; Cai, Yunhai; Cameron, David; Crouch, Matthew; Maria, Riccardo De; Field, Laurence; Giovannozzi, Massimo; Hermes, Pascal; Høimyr, Nils; Kaltchev, Dobrin; Karastathis, Nikos; Luzzi, Cinzia; Maclean, Ewen; McIntosh, Eric; Mereghetti, Alessio; Molson, James; Nosochkov, Yuri; Pieloni, Tatiana; Reid, Ivan D.; Rivkin, Lenny; Segal, Ben; Sjobak, Kyrre; Skands, Peter; Tambasco, Claudia; Veken, Frederik Van der; Zacharov, Igor

2017-12-01

The LHC@Home BOINC project has provided computing capacity for numerical simulations to researchers at CERN since 2004, and has since 2011 been expanded with a wider range of applications. The traditional CERN accelerator physics simulation code SixTrack enjoys continuing volunteers support, and thanks to virtualisation a number of applications from the LHC experiment collaborations and particle theory groups have joined the consolidated LHC@Home BOINC project. This paper addresses the challenges related to traditional and virtualized applications in the BOINC environment, and how volunteer computing has been integrated into the overall computing strategy of the laboratory through the consolidated LHC@Home service. Thanks to the computing power provided by volunteers joining LHC@Home, numerous accelerator beam physics studies have been carried out, yielding an improved understanding of charged particle dynamics in the CERN Large Hadron Collider (LHC) and its future upgrades. The main results are highlighted in this paper.

LabVIEW Support at CERN

CERN Multimedia

HR Department

2010-01-01

Since the beginning of 2009, due to the CERN restructuring, LabVIEW support moved from the IT to the EN department, joining the Industrial Controls and Electronics Group (ICE). LabVIEW support has been merged with the Measurement, Test and Analysis (MTA) section which, using LabVIEW, has developed most of the measurement systems to qualify the LHC magnets and components over the past 10 years. The post mortem analysis for the LHC hardware commissioning has also been fully implemented using LabVIEW, customised into a framework, called RADE, for CERN needs. The MTA section has started with a proactive approach sharing its tools and experience with the CERN LabVIEW community. Its framework (RADE) for CERN integrated application development has been made available to the users. Courses on RADE have been integrated into the standard National Instruments training program at CERN. RADE and LabVIEW support were merged together in 2010 on a single email address:labview.support@cern.ch For more information please...

History of CERN. V. 2

International Nuclear Information System (INIS)

Hermann, A.; Krige, J.; Mersits, U.; Pestre, D.; Weiss, L.

1990-01-01

This volume of the History of CERN starts at 8 October 1954, when the Council of the new organization met for the first time, and takes the history through the mid-1960's. when it was decided to equip the laboratory with a second generation of accelerators and a new Director-General was nominated. It covers the building and the running of the laboratory during these dozen years, it studies the construction and exploitation of the 600 MeV Synchro-cyclotron and the 28 GeV Proton Synchrotron, it considers the setting up of the material and organizational infrastructure which made this possible, and it covers the reigns of four Director-Generals, Felix Bloch, Cornelis Bakker, John Adams and Victor Weisskopf. Part I describes the various aspects which together constitute the history of CERN and aims to offer a synchronic panorama year by year account of CERN's main activities. Part II deals primarily with technological achievements and scientific results and it includes the most technical chapters in the volume. Part III defines how the CERN 'system' functioned, how this science-based organization worked, how it chose, planned and concretely realized its experimental programme on the shop-floor and how it identified the equipment it would need in the long term and organized its relations with the outside world, notably the political world. The concluding Part IV brings out the specificity of CERN, to identify the ways in which it differed from other big science laboratories in the 1950's and 1960's, and to try to understand where its uniqueness and originality lay. (author). refs.; figs.; tabs

Le CERN réagit à l'augmentation du coût du LHC à son achèvement