h. reich-sprenger, gsi vacuum group, eu construction kick-off meeting, dec 1st – 2nd 2005 1 gsi...
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H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 1
GSI Vacuum groupGSI Vacuum group
GSI Vacuum group:
•5 physicists (Bellachioma, Kollmus, Krämer, Reich-Sprenger, Wilfert)
•7 engineers (Bender, Bevcic, Kaminski, Kurdal, Schäfer, Welzel, Wolff)
•23 technicans (Emmerich, de Cavaco, Gaj, Gustafson, Hammann, Herge, Heyl, Horn, Jagsch, Kischnik, Kolligs, Kredel, Leiser, Lück, Mühle, Müller, Norcia, Quador, Savino, Sigmund, Stagno, Thurau, Volz)
Collaborations:• Mahner, Strubin (CERN): desorption R&D
• Assmann (TU München): desorption R&D
• Hedlund, Westerberg (TSL): FAIR SIS-upgrade
• Benvenuti, Calatroni, Chiggiato (CERN): NEG coating
• Anashin, Krasnov (BINP): FAIR SIS-upgrade
• Reid, Malyshev (CCLRC): FAIR SIS-upgrade
• Yang, Zhang (IMP): FAIR CR UHV
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 2
GSI Vacuum group experienceGSI Vacuum group experience
Facilities: UHV Lab (upgrade in 2004/2005) NEG coating facility (since 2005) Ultrasonic cleaning facility
Operation experience: all GSI accelerator Vacuum systems (UNILAC, SIS18, ESR, HEBT)
Upgrade experience: SIS18, ESR, Vacuum Controls, bakeout
Installation experience: all modifications to GSI accelerators and experiments
Project experience: HICAT: UHV layout, Vacuum system procurement, complete preassembling and
installation of the HICAT accelerator facility (2001-2007, volume ~ 3.5 M€), CNAO: LINAC preassambling and installation HITRAP: UHV Layout, Vacuum system procurement, preassambling and
installation
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 3
EU construction Task SIS18-2EU construction Task SIS18-2
Task No Descriptive Title Leading Participant
Short description and specific objectives of the task
Management-CNI Management of the CNI GSI Management of the Construction Consortium, controlling, reports, auditing
SIS18-1 GSI SIS18-2 UHV vacuum upgrade GSI Up-grade of the vacuum system
with new magnet chambers, an improved bake-out system, and NEG to reach a static base pressure of 2∙10-12 mbar and to keep the dynamic pressure below 1∙10-11 mbar during operation with the highest intensities of heavy ion beams needed for the IAF.
SIS18-3
SIS18-4
SIS18-5
SIS18-6
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 4
UHV system requirementsUHV system requirementsfor FAIR (base: TR)for FAIR (base: TR)
Due to ion beam lifetime requirements(e.g.: U28+ in SIS18):
SIS18: bakeable p≈5·10-12 mbar SIS18 upgradeESR: bakeable p≈5·10-12 mbar
SIS100: cold arcs T=7-20K bakeable straight sections T=300K p≈5·10-12 mbar
SIS300: cold arcs T=4.2K bakeable straight sections T=300K p≈5·10-12 mbar
NESR: p≈5·10-12 mbar (bakeable)HESR: p≤10-10 mbar (bakeable)RESR: p≤10-10 mbar (bakeable)CR: p≤10-9 mbar (no bakeout, HICAT design)HEBT/SFRS: length 2.5 km, 70% cold, no bakeout
(except: differential pumping sections to rings)
*all pressures: N2 equivalent
SIS100/300
HESR
NESRCR
RESR
from SIS18
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 5
Desorption PhenomenaDesorption Phenomena(SIS18 upgrade, SIS100, SIS300)(SIS18 upgrade, SIS100, SIS300)
1. Optimized static pressure : SIS18 upgrade NEG coating of
conductance limiting vacuum chambers (improved dipole, new quadrupole) EU construction SIS18-2,
SIS100, SIS300: use of cryogenic pumping (T(magnet camber)< 7 K)
2. Optimized dynamic conditions: R&D program on the underlying
physical processes collimator concept with increased local pumping speed EU construction SIS18-3
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 6
GSI NEG-coating facilityGSI NEG-coating facility
Magnetron sputter technique
CERN patent, technology transfer and license agreement between CERN and GSI established in 2005,
sample tubes sucessfully coated at GSI,
large facility for dipole chamber coating almost finished (first coating of one SIS18 dipole chamber in 11/2005)
Vacuum Arc NEG deposition
GSI patent, proove of principle in 2004,
application for localized coating of components and insertions
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 7
Ion Beam Loss induced Desorption (dynamic Ion Beam Loss induced Desorption (dynamic vacuum)vacuum)
Ions lost on the inner surface of vacuum chambers release up to 105 molecules (mainly H2, CO ),
under high ion beam intensity operation with medium charged heavy ions desorption could create vacuum instabilities and could limit in this way maximum ion beam intensities accelerated,
underlying physical processes were not understood, 2 experimental setups were put into operation at GSI in close
collaboration with CERN, TU München, TSL , ERDA (Elastic Recoil ion Detection Analysis) and the measurement
of the desorption process in dependence of energy, charge and type of the incident ion on different target materials are leading to an understanding of the physics,
the results of the measurements will lead to an optimized UHV layout and an effective collimator design
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 8
Ion Induced Desorption (1)Ion Induced Desorption (1) direct input to SIS18 upgrade direct input to SIS18 upgrade
Desorption Test Stand• static vacuum 1x10-10 mbar• equipped with RGA and extractor• installed behind SIS18
availible beam:● protons to uranium● 15 – 1000 MeV/u
U73+ beam
clear (dE/dx)2 scaling
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 9
Ion Induced Desorption (2)Ion Induced Desorption (2) direct input to SIS18 upgrade direct input to SIS18 upgrade
ERDA MeasurementsElastic Recoil ion Detection Analysis under UHV conditions (1x10-10 mbar)● target characterization during ion bombarding● total and partial pressure measurements in parallel
oxygen profile
ion beam scrubbing of the oxyde layer -> linked to desorption yields
(detailed results will be published: EPAC06, H.Kollmus; M. Bender)
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 10
SIS18-2 (UHV-upgrade), participating SIS18-2 (UHV-upgrade), participating groupsgroups
TSL will contribute to SIS18-2, i.e. to the UHV upgrade program. The role of TSL is to participate in the upgrade of the SIS18 UHV dipole chambers. An important part of this optimization process are measurements to study desorption rates for layers of NEG coating due to the impact of light and heavy ions in a broad energy range from 10 to 1000 MeV/u. They will contribute 3 professional person-months to perform the desorption measurements.
CCLRC will also contribute to SIS18-2, i.e. to the UHV upgrade program. CCLRC is working in the field of NEG coating for synchrotron radiation machines. The laboratory will cooperate with GSI on various topics of simulation calculations. The contribution in terms of professional person-months will be of the order of 1 person-month per year.
INP is a leading laboratory in the field of high-energy electron colliders. INP will take over a coordinating function for SIS18-2 and take part in the design, and manufacturing of the new SIS18 quadrupole chambers. These chambers have to be designed for a wall thickness below 0.5 mm and for a bake-out temperature of 3000 C. All chambers shall be coated (at GSI) with a NEG layer to achieve the required distributed pumping speed. For the NEG coating one has to look for materials, which are proven having lowest de-sorption yield under heavy ion bombardment.
Participant Roles Personal cost [k€]
Investment [k€]
total request [k€]
GSI Construction leading Lab 442 291 733
TSL paticipation in desorption measurements at GSI
24 21 45
CCLRC UHV system modelling
25 - 25
BINP design and manufacturing of 15 sets of new 4-pole chamber (long and short type)
51 (177expected)
188 239
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 11
SIS18-2 / timescaleSIS18-2 / timescale
ID Task Name Deliverables Milestones
1 SIS18 UHV upgrade
2 SIS18 dipole chamber upgrade
3 Bake-out equipment: design +testing of prototype
4 Decision for manufacturing 04/05 Design dipolechamber bake-out
5 Procurement of bake-outequipment
07/05 Bake-outsystem
6 UHV acceptance tests
7 Installation / commissioning inSIS18 (shutdown periods)
8 SIS18 quadrupole chamberupgrade
9 Design + production ofprototype
10 Decision for chambermanufacturing
07/05 Designquadrupole chamber
11 Decision for bake-outequipment manufacturing
07/05 Design QPbake-out
12 Manufacturing and UHVacceptance tests
04/06 12 QPchambers
13 Installation / commissioning inSIS18 (shutdown periods)
14 NEG coating technology
15 NEG coating of 2 dipolechambers (prototype)
16 UHV acceptance tests
17 Installation in one vacuumsector of SIS18 (shutdownperiods)
18 Decision on NEG coating of allmagnet vacuum chambers(dipole and quadrupole)
10/05 Design NEGcoating
19 NEG coating of all dipolechambers
20 Installation of coated dipolechambers in SIS18
21 NEG coating of all (16)quadrupole chambers
22 Installation / commisioning ofcoated quadrupole chambersin SIS18
23 Cryogenic vacuum pumps
24 Procurement of cryo pumpsystem prototype, UHVacceptance tests
04/05 Prototypecryo pump
25 Installation in one vacuumsector of SIS18 (shutdownperiods)
26 Decision on series production 07/05 Design cryopumps
27 Procurement of up to 6 cryopump systems, UHVacceptance tests
04/06 6 cryopumps
28 Installation / commissioning inSIS18 (shutdown periods)
29 Commissioning
30 Commissioning with U (28+)
31 Technical report 12/08 Report
01.04.
01.07.
01.07.
01.10.
01.07.
31.12.
Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q32004 2005 2006 2007 2008 2009
starting has to
be shifted
to date of signed contracts
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 12
H. Reich-Sprenger, GSI Vacuum group, EU construction Kick-Off meeting, dec 1st – 2nd 2005 13