peter mcintosh (stfc daresbury laboratory) jim clarke (stfc daresbury laboratory) camille ginsburg...
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WG6: TECHNOLOGY FOR ACCELERATORS
Peter McIntosh (STFC Daresbury Laboratory)Jim Clarke (STFC Daresbury Laboratory)Camille Ginsburg (FNAL)
2nd PASI Workshop, RAL April 3 - 5, 2013
• PASI #1 Review Topics• Achievements During 2012• Plans for PASI #2
– New Technology Topic Areas• Conclusions
Overview
PASI #1 Review – SRF Processing• SRF Infrastructure (VTS, HTS,
processing):– UK users of FNAL facilities
(Shakespeare Engineering Ltd cavity?), 1 or 2 week visits
– 1 or 2 year visits
• Qualification of Shakespeare by FNAL:– Test single cell cavity– Test 9 cell cavity
• CBP processing & potential transfer knowledge/capability to UK.
PASI #1 Review – SRF Linac/Cavities
• Daresbury Cryomodule – CW especially interesting:– Visits/commissioning.
• ISIS upgrade – SRF linac:– Design study (if required).
• Microphonics & Lorentz detuning control, passive/active:– (Especially CW & long pulse)– Expts with Daresbury
cryomodule and tests at FNAL• Deflecting/Crab cavity
(ASTA, PX, LHC, NLS):– Information exchange, identify
& exploit opportunities/synergies.
PASI #1 Review – ASTA Programme• ASTA experiments/instrumentation:
– Information exchange, identify & exploit opportunities/synergies.
– Carry out (joint) experiments & supply instrumentation/test diagnostics (?).
ASTA
NLS
PASI #1 Review - Magnets• PAMELA magnets/integrable optics:
– Explore synergies with 6D cooling magnets.– (Cross cutting opportunity with magnets & muons).
• Interface between materials science & accelerator application of SC:– Examine opportunities at interfaces with other disciplines
(surface science, materials science,…)• HTS testing, insulation coatings of Bi2212:
– Investigate interest on interlab exchange of test samples.• Exploration of technology for ADSR.
SRF Vendor Qualification• In December 2009 STFC Innovations Mini-IPS (Industry
Partnership Scheme) funding secured (1-year):– Knowledge exchange of SRF cavity fabrication and qualification
with Shakespeare Engineering Ltd.• Purpose of the programme to develop the capability of UK
industry to produce and validate SRF cavities.• Technology would then be directly applicable to future
large scale accelerator facilities.• Aim was to utilise existing SRF test facilities at Daresbury
and Jlab to process and validate the fabricated cavities. • Long term plans to provide an opportunity for UK
industry to bid for the construction of the SRF systems for major particle accelerators.
• Competencies gained will provide an opportunity for technology and knowledge transfer and ultimately the entire process would scale to industrial production needs.
Jlab Qualification 2010• 3 x single cell 1.3GHz SRF cavities
fabricated:– Spinning of beampipes demonstrated.
• Verification tests performed:– SN01 was successfully tested at Jlab.– Targets exceeded 23 MV/m with a Q0 >
1010
– Accelerating gradient of 28 MV/m with a Q0 = 2.9 x 109 achieved
– Improvements to baking and BCP processing facility taking place at Daresbury to facilitate testing of SN02.
– SN03 currently at FNAL undergoing processing prior to test.
• Cavity Preparation for VTS test:1. Bulk EP (Argonne/FNAL)2. 800 C Hydrogen Degas3. Light EP (Argonne/FNAL)4. No 120 C bake
• Tests performed at 2K.• Initial Qo @ 3 MV/m = 2.2 x 1011
• Soft MP observed @ 18 MV/m.• Repetitive quench @ 25 MV/m, 1.5 x 1010
– No sign of conditioning.– No radiation observed
• CBP processing currently underway.
• Acknowledge support from: – C Ginsburg – FNAL Project Lead– A Rowe – Cavity Processing– Curtis Crawford – VTS testing– Alex Melnitchouk – Report summary
FNAL Qualification 2012
See: Alan Wheelhouse Talk: WG6 Session 3, Thursday 4th April 11:00 – 12:30
• STFC, Lancaster Univ & CERN collaborating to develop Crab Cavity solution for LHC:– 4-Rod Crab Cavity (4RCC) – EUCARD– Crab Cavity Cryomodule – HL-LHC
• US-LARP supporting:– Ridged-waveguide CC R&D with ODU/Jlab – Coaxial CC R&D with BNL – CM development progressing with FNAL.
• CERN require LHC-CC CM to be tested on SPS prior to installation on LHC.
• CM design developing to match SPS installation and qualification during 2015/16.
• LHC-CC CM down-selection expected in 2016/17.
LHC-CC Cryomodule R&D
• SPS space constraints differ from LHC IP locations.
• Common engineered CM solution being developed by UK team.
• Review meeting held at FNAL in Dec12:– CM engineering issues
reviewed.– Collaborative
opportunities identified with FNAL across both LHC-CC and PXIE CM designs.
LHC-CC Cryomodule R&D
See: Shrikant Pattalwar Talk: WG6 Session 5, Friday 5th April 09:00 – 10:30
New SRF Cryomodule @ Daresbury
• Collaboration formulated in early 2006 to design and fabricate new CW cryomodule and validate with beam.
• Dimensioned to fit on the ALICE ERL facility at Daresbury:– Same cryomodule footprint.– Same cryo/RF interconnects.– ‘Plug Compatible’ with existing
cryomodule.
Parameter Target
Frequency (GHz) 1.3
Cryomodule Length (m)
3.6
R/Q () 762
Eacc (MV/m) >20
Epk/Eacc 2.23
Hpk/Eacc 46.9
CM Energy Gain (MeV) >32
Qo >1010
Qext 4 x 106 - 108
• During Mar13 CM successfully cooled to 2K and preparing for high power RF testing.
• CM will probe fundamental ERL performance capabilities of SRF cavities.
• >20 MV/m CW operation anticipated, strong synergy with PXIE SRF linac systems:– Thermal characterisation.– Microphonics sensitivity &
suppression.– RF control & stability studies.
CM Integration on ALICE
See: Peter McIntosh Talk: WG6 Session 4, Thursday 4th April 13:30 – 15:00
• RF Control Challenges:– PXIE, MICE, ALICE, VELA
• Microphonics, feedback/feed-forward processes.
• Diagnostics & Instrumentation (with WG4):– PXIE, FETS, ISIS
• RF System Developments (with WG4):– SRF cavity & cryomodules, RFQ’s
• CW Operation and Thermal Management.• Crab/deflecting cavity development.
• Test Facilities (with WG4):– PXIE, FETS, ALICE, EMMA, VELA
• Serpentine acceleration with EMMA.• Magnets and Vacuum Systems.
• Industrialisation (with WG4):– IARC, FNAL, LHC.– SRF cavity fabrication/preparation with industry.
PASI #2 Technologies
New
New
New
New
• From PASI #1, collaboration has achieved:• Successful SRF qualification of new UK vendor.• CW experiments identified for new SRF CM on ALICE.• CM development opportunities identified for both
LHC and PXIE.
• New technology areas identified for PASI #2:• RF Control Challenges• Diagnostics & Instrumentation• Test Facilities• Industrialisation
• Anticipate strengthening UK/FNAL collaboration in these respective areas.
Conclusions
THANK YOU!
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