Dr
Yulin Li
(Laboratory for Elementary-Particel Physics, Cornell University)
11/04/2005, 14:15
SESSION 1
The 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 Foundation
Mr
Shaun Hughes
(CCLRC)
11/04/2005, 14:20
SESSION 1
An overview of Rutherford Appleton laboratory main activities with a quick look at
ISIS and its recent upgrades.
Dr
Hiroshi Saeki
(JAPAN SYNCHROTRON RADIATION RESEARCH INSTITUTE)
11/04/2005, 14:25
SESSION 1
SPring-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...
Mr
Patrick Dolegieviez
(GANIL)
11/04/2005, 14:30
SESSION 1
This presentation gives a description of the laboratory and its activities. An
overview of the SPIRAL 2 project is given with its specific environmental
constraints.
Dr
Igor Sekachev
(TRIUMF, Canadian National Laboratory)
11/04/2005, 14:35
SESSION 1
The 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...
Prof.
Lars Westerberg
(The Svedberg Laboratory, Uppsala University)
11/04/2005, 14:40
SESSION 1
The 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....
Dr
Mike Seidel
(DESY)
11/04/2005, 14:45
SESSION 1
The 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.
24.
The SIS18 UHV-upgrade program for high ion beam intensity operation of medium charged heavy ions
Dr
Hartmut Reich-Sprenger
(Gesellschaft fuer Schwerionenforschung GSI)
11/04/2005, 14:50
SESSION 1
The 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...
Dr
Jose Miguel Jimenez
(CERN)
11/04/2005, 14:55
SESSION 1
The 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...
Dr
Peter Ladd
(ORNL)
11/04/2005, 15:00
SESSION 1
An 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...
Dr
Fabio Mazzolini
(SincrotroneTriesteS.C.p.A.)
11/04/2005, 15:05
SESSION 1
A description of the Elettra vacuum system and of the vacuum related activities will be given.
Eshraq AL-Dmour
(CELLS, Building C, Campus UAB, 08193 Bellaterra, Spain)
11/04/2005, 15:10
SESSION 1
ALBA 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...
Dr
Matthew Cox
(Diamond Light Source Ltd)
11/04/2005, 15:25
SESSION 1
Diamond 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...
Dr
Hiroshi Saeki
(JAPAN SYNCHROTRON RADIATION RESEARCH INSTITUTE)
11/04/2005, 16:30
SESSION 2
It 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,...
Emma Hedlund
(Department of Radiation Sciences, Uppsala University)
11/04/2005, 16:45
SESSION 2
Outgassing 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...
Mr
Jörg Kurdal
(GSI)
11/04/2005, 17:00
SESSION 2
For 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...
Mr
Willemjan Maan
(CERN)
11/04/2005, 17:15
SESSION 2
A 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.
Dr
Mike Seidel
(DESY)
12/04/2005, 08:30
SESSION3
HERA 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.
Dr
Yulin Li
(Laboratory for Elementary-Particel Physics, Cornell University)
12/04/2005, 08:45
SESSION3
Cornell 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...
Dr
Igor Sekachev
(TRIUMF, Canadian National Laboratory)
12/04/2005, 09:00
SESSION3
The 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...
Dr
Peter Ladd
(ORNL)
12/04/2005, 09:15
SESSION3
An 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,...
Mr
Michael Hahn
(ACTING HEAD OF ESRF VACUUM GROUP)
12/04/2005, 09:30
SESSION3
The 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...
Dr
Fabio Mazzolini
(SincrotroneTriesteS.C.p.A.)
12/04/2005, 09:45
SESSION3
A description of some vacuum faults in Elettra
Mr
Shaun Hughes
(CCLRC)
12/04/2005, 11:00
SESSION 4
An overview from the problems arising from high levels of gamma
radiation on the
ISIS accelerator.
Dr
Jose Miguel Jimenez
(CERN)
12/04/2005, 11:15
SESSION 4
This 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...
Mr
Patrick Dolegieviez
(GANIL)
12/04/2005, 11:30
SESSION 4
The 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...
Mr
Timothy Whitlatch
(Thomas Jeffersson Laboratory)
12/04/2005, 14:00
SESSION 5
The CEBAF vacuum system will be described together with an overview of the diagnostic tools and main
concerns.
Mr
Gao-Yu HSIUNG
(National Synchrotron Radiation Research Center)
12/04/2005, 14:15
SESSION 5
In 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...
Mr
Hugo Shiers
(Diamond Light source)
12/04/2005, 14:30
SESSION 5
Diamond 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...
Mr
Knut Welzel
(GSI)
12/04/2005, 14:45
SESSION 5
In 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...
Dr
Hsiao-Chaun Hseuh
(Brookhaven National Laboratory)
12/04/2005, 15:00
SESSION 5
The 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...
