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