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Mr Pierre Strubin (CERN)11/04/2005, 14:00SESSION 1
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Dr Yulin Li (Laboratory for Elementary-Particel Physics, Cornell University)11/04/2005, 14:15SESSION 1The major vacuum related activity at LEPP, Cornell is centered on the Cornell Electron Storage Ring (CESR), which consists of a RF Linac, a synchrotron boost ring and the CESR. We are currently also starting to ramping up vacuum R&D work leading to the construction of Cornell Energy Recovery Linac (ERL). This work is supported by US National Science FoundationGo to contribution page
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Mr Shaun Hughes (CCLRC)11/04/2005, 14:20SESSION 1An overview of Rutherford Appleton laboratory main activities with a quick look at ISIS and its recent upgrades.Go to contribution page
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Dr Hiroshi Saeki (JAPAN SYNCHROTRON RADIATION RESEARCH INSTITUTE)11/04/2005, 14:25SESSION 1SPring-8 (Super Photon Ring 8 GeV) as a synchrotron radiation source, is operated and maintained by Japan Synchrotron Radiation Research Institute (JASRI) under a control of RIKEN and JAERI. The facility consists of a 1 GeV linac, a booster synchrotron (1-8 GeV), and a storage ring with 47 beam lines (maximum designed beam lines of 62). The average pressure in beam ducts of the linac...Go to contribution page
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Mr Patrick Dolegieviez (GANIL)11/04/2005, 14:30SESSION 1This presentation gives a description of the laboratory and its activities. An overview of the SPIRAL 2 project is given with its specific environmental constraints.Go to contribution page
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Dr Igor Sekachev (TRIUMF, Canadian National Laboratory)11/04/2005, 14:35SESSION 1The proton cyclotron was built at TRIUMF in 1972 and commissioned to full energy in 1974. The volume of the cyclotron vacuum tank is about 100 m**3.The vacuum during beam production is at 2**10-8 Torr, which is achieved mostly by cryopumping with B-20 cryogenerator and six cryopumps. The B-20 is a Stirling cycle refrigerator, which supplies helium gas at 16K and 70K to the cryopanels in...Go to contribution page
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Prof. Lars Westerberg (The Svedberg Laboratory, Uppsala University)11/04/2005, 14:40SESSION 1The k=192 synchrocyclotron is pumped by 2 large diffusion pumps with cryo baffles and has internal Meissner cryo traps. The CELSIUS storage ring is pumped by a combination of ion pumps and sublimation pumps. Large H2 and D2 gas loads from the pellet target of the CELSIUS-WASA experiment are pumped by cryo pumps and NEG pumps to give a low enough pressure in the electron cooler....Go to contribution page
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Dr Mike Seidel (DESY)11/04/2005, 14:45SESSION 1The brief presentation will cover an overview on the accelerator vacuum systems presently under operation at DESY. Furthermore a short description of our activities for the two new projects PETRA III and XFEL will be given.Go to contribution page
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24. The SIS18 UHV-upgrade program for high ion beam intensity operation of medium charged heavy ionsDr Hartmut Reich-Sprenger (Gesellschaft fuer Schwerionenforschung GSI)11/04/2005, 14:50SESSION 1The SIS18 heavy ion synchrotron will operate as an injector for the GSI FAIR project. UHV instabilities were observed during high ion beam intensity operation limiting the ion beam lifetime of medium charged heavy ions (e.g. U28+). An intense upgrade of the existing UHV system was started including an experimental program on the desorption processes and measures to improve the residual...Go to contribution page
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Dr Jose Miguel Jimenez (CERN)11/04/2005, 14:55SESSION 1The Vacuum Group, as part of the Accelerator Technology Department, has a wide mandate covering the design, installation, exploitation and upgrades of all CERN accelerators including the experimental areas. This talk will briefly introduce the vacuum specificities of all the accelerators under the responsibility of the CERN Vacuum Group with a special emphasis on the ultimate pressure...Go to contribution page
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Dr Peter Ladd (ORNL)11/04/2005, 15:00SESSION 1An overview of the installation of the SCL warm sections at the Spallation Neutron Source (SNS) is presented as the project proceeds on schedule to beam on target planned for mid 2006. Specifically addressed are the procedures adopted during the assembly and installation of the warm sections needed to maintain the cleanliness levels required as they are connected to the...Go to contribution page
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Dr Fabio Mazzolini (SincrotroneTriesteS.C.p.A.)11/04/2005, 15:05SESSION 1A description of the Elettra vacuum system and of the vacuum related activities will be given.Go to contribution page
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Eshraq AL-Dmour (CELLS, Building C, Campus UAB, 08193 Bellaterra, Spain)11/04/2005, 15:10SESSION 1ALBA is the Spanish 3GeV, 3rd generation light source to be built near Barcelona. The circumference of the storage ring is 268.8m with 400mA nominal beam current. The storage ring will be divided into 16 vacuum sections by gate valves. The vacuum chamber will be made of stainless steel with electron beam vertical aperture of 28mm and 72mm width with a slot of 10mm height to connect the...Go to contribution page
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Dr Matthew Cox (Diamond Light Source Ltd)11/04/2005, 15:25SESSION 1Diamond Light Source is new synchrotron light facility currently under construction in Oxfordshire in the UK. First user beam is scheduled for 2007. Diamond consists of a 3 GeV electron storage ring 561.6 m in circumference together with a 100 MeV Linac and a 158.4 m circumference booster ring. 7 experimental beamlines will be available initially. A brief overview of the Diamond...Go to contribution page
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Dr Hiroshi Saeki (JAPAN SYNCHROTRON RADIATION RESEARCH INSTITUTE)11/04/2005, 16:30SESSION 2It is well-known that ionization gauges mis-read due to an influx of photoelectrons flowing from an external environment. In the SPring-8 storage ring, some of hot- cathode-ionization gauges (B-A gauges) have indicated abnormally-low pressures (on the order of 10-9 Pa) or negative pressures (from -2 x 10-9 Pa to -2 x 10-7 Pa) at stored-electron-beam conditions due to the same cause,...Go to contribution page
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Emma Hedlund (Department of Radiation Sciences, Uppsala University)11/04/2005, 16:45SESSION 2Outgassing measurements are often performed by vacuum specialists and physicists when designing new accelerator equipment and experiments in storage rings etc. Such measurements are, however, rather seldom published. It would be an advantage for the vacuum community if such results could be made available for the general public by creating a database. As an example, we could not find...Go to contribution page
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Mr Jörg Kurdal (GSI)11/04/2005, 17:00SESSION 2For the SIS18 upgrade, in the frame of the FAIR project, the use of non evaporable getter (NEG) films is foreseen. This will increase the pumping speed for CO and H2 more than one order of magnitude. Calculations performed by means of the Vaktrak code have proved that the installation of NEG coated dipole and quadrupole chambers will lead to a better base pressure of about a factor...Go to contribution page
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Mr Willemjan Maan (CERN)11/04/2005, 17:15SESSION 2A brief history of the fast valves in use at CERN and of their mechanical design since the 1970’s will be given. The recent example of the LEP fast valves will also be described as well as the improvements introduced. Finally some arguments in favour and against the use of fast valves in high energy accelerators will be enumerated and discussed.Go to contribution page
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Dr Mike Seidel (DESY)12/04/2005, 08:30SESSION3HERA is a large electron proton collider that operates since 2000 with upgraded interaction regions. We present several severe failure scenarios which resulted from heating by mis-steered synchrotron radiation fans, accidental losses of the proton beam or simply component failure.Go to contribution page
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Dr Yulin Li (Laboratory for Elementary-Particel Physics, Cornell University)12/04/2005, 08:45SESSION3Cornell Electron Storage Ring supports three science programs, the CLEO High Energy Physics Experiments, the Cornell High Energy Synchrotron Sources and the Accelerator Physics and R&D. The reliability of the CESR vacuum system is essential to the success of these science programs. A network of 70+ cold cathode ion gauges, RGAs and over thousand of thermal couples monitor the...Go to contribution page
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Dr Igor Sekachev (TRIUMF, Canadian National Laboratory)12/04/2005, 09:00SESSION3The cyclotron at TRIUMF was built in 1972 and commissioned to full energy in 1974. The cyclotron vacuum tank is very complex with a total of 208 ports and a main double seal 17 meters in diameter. The volume of the tank is about 100 m3 and operates at 2*10-8 Torr. The vacuum is achieved by cryopumping with internal cryopanels cooled by a Philips B-20 cryogenerator and six cryopumps. A...Go to contribution page
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Dr Peter Ladd (ORNL)12/04/2005, 09:15SESSION3An operational experience to be shared that followed fine tuning of the RF performance of the drift tube linac after initial tank conditioning. The conditioning power level of 2.2 MW that was achieved during initial conditioning could not be obtained following further mechanical tuning of the RF system. The initial suspect was vacuum, specifically pressure spikes in the window area,...Go to contribution page
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Mr Michael Hahn (ACTING HEAD OF ESRF VACUUM GROUP)12/04/2005, 09:30SESSION3The ESRF Vacuum Group uses a number of analysis tools to identify vacuum failures or irregularities by systematic study of not only total and partial pressure data but also by looking into relation with machine data of the Storage ring such as beam emittance, gap opening of Insertion Devices, temperatures, Bremsstrahlung and many more. The storage of all these values in a common...Go to contribution page
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Dr Fabio Mazzolini (SincrotroneTriesteS.C.p.A.)12/04/2005, 09:45SESSION3A description of some vacuum faults in ElettraGo to contribution page
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Mr Shaun Hughes (CCLRC)12/04/2005, 11:00SESSION 4An overview from the problems arising from high levels of gamma radiation on the ISIS accelerator.Go to contribution page
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Dr Jose Miguel Jimenez (CERN)12/04/2005, 11:15SESSION 4This talk aims to summarize the experience with the SPS and LEP over the past 15 years dealing with leaks in radioactive components and environments. The annual doses and sources of radiation will be presented together with dose estimations during a typical mechanical intervention during the run. The corrosion of the stainless steel materials by the hydrochloric acid is the main cause...Go to contribution page
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Mr Patrick Dolegieviez (GANIL)12/04/2005, 11:30SESSION 4The GANIL is a heavy ions accelerator in operation from 1983, and composed of a set of 5 cyclotrons. Since 2001, the SPIRAL facility allows to produce radioactive ion beams (energy range 2 to 25 MeV/u) with the primary beams delivered by GANIL. The vacuum system of the large vessels of the cyclotrons are described as well as the SPIRAL vacuum systems. The maintenance procedures imposed by...Go to contribution page
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Mr Timothy Whitlatch (Thomas Jeffersson Laboratory)12/04/2005, 14:00SESSION 5The CEBAF vacuum system will be described together with an overview of the diagnostic tools and main concerns.Go to contribution page
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Mr Gao-Yu HSIUNG (National Synchrotron Radiation Research Center)12/04/2005, 14:15SESSION 5In order to protect the vacuum system for the Taiwan Light Source (TLS), a vacuum interlock system has been developed. The status of all the vacuum devices, including the sector gate valves, ionization gauges, and the pumps, are monitored and hence the vacuum system can be protected as soon as a vacuum failure happened. In addition, an alarm system has been established to monitor the...Go to contribution page
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Mr Hugo Shiers (Diamond Light source)12/04/2005, 14:30SESSION 5Diamond will utilise around 700 capture pumps, 350 total pressure gauge sets, 150 RGAs, and 100 pneumatic valves. The bulk of the equipment will be contained on the machine and beamlines. The control of this equipment will be done though EPICS, the chosen control system for Diamond. A discussion here will concentrate on the following points. · Interfacing the equipment into...Go to contribution page
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Mr Knut Welzel (GSI)12/04/2005, 14:45SESSION 5In 2004 GSI changed the vacuum control- and interlock system from a software to a hardware based system. It's used to control and monitor around 55 pneumatic sector and five fast closing valves. The new control system, which is completely integrated in the GSI accelerator control system, uses total pressure values, determined by the current of ion pumps, and wide-range ion gauges. In...Go to contribution page
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Dr Hsiao-Chaun Hseuh (Brookhaven National Laboratory)12/04/2005, 15:00SESSION 5The RHIC storage rings have approximately 1600 vacuum instruments, consisting vacuum gauges, sputter ion pumps, titanium sublimation pumps, residual gas analyzers, sector gate valves and turbopump stations. They are distributed in eight service buildings and inside the RHIC tunnel. This PLC based control system has performed well since 1997 to support the machine operation and the...Go to contribution page
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