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ANL-FNAL Collaboration Meeting:
Superconducting RF
ANL: Mike Kelly, Scott Gerbick, Bill Boettinger (NE)
FNAL Collaborators: Kerry Ewald, Cristian Boffo, Dan Olis, Allan Rowe
Speaker: Mike Kelly
May 18, 2007
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ANL SRF GroupM. Kelly, J. Fuerst, S.Gerbick
Z. Conway (Grad. Student)
K. Shepard (1 day/week)
Coordination
Nb procurement, QA
Mechanical & EM design
Chemistry
Clean processing & assembly
Testing
AES
Sciaky
Niobium tooling and forming
Electron beam welding
ANL Shops
Meyer Tool
Brazing
Stainless machining
ILC AEBLERL
203 Cold Test Facility
203 Surface Prep Lab
SCSPF
HINS
SRF Accelerator Projects
ANL SRF Facilities
Manpower
Projects in Superconducting RF (ANL perspective)
CollaboratorsK. Ewald, A. Rowe, D. Olis
ATLAS
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SRF at ANL Effort for ILC
FY07
ANL interest is to develop the complete capability for building, processing, testing, operating
elliptical cavities
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Major Areas of ANL/FNAL SRF Collaboration
Cavity Processing Infrastructure (2002-07)
Chemistry/Clean rooms
Scrubber
Ultra-pure water system
High-pressure water pump
Electropolishing System, 12 design meetings since Oct. 06
Cathode/Cathode Loading – FNAL lead
Cavity mechanical assembly – ANL lead
High-pressure water rinsing/single cavity clean assembly
“G150” Surface Prep Laboratory at ANL
3.9 GHz Cavity Buffered Chemical Polishing
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ILC-Americas Planning:ANL/FNAL to Lead Cavity Processing
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Technical Approach: A Horizontal Electropolishing System
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Technical Approach: Cathode Loading, Acid Draining, Water Rinsing
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Electropolishing Design Review at ANL, Feb. 12 2007
Reviewers: Hasan Padamsee (Cornell), Kenji Saito (KEK), Tsuyoshi Tajima (LANL), Lutz Lilje (DESY), Axel Matheisen (by phone DESY), Marc Ross (FNAL), John Mammosser (JLAB)
Presenters: Mike Kelly (ANL), Cristian Boffo (FNAL)
Does the design meet the ILC specifications? Will the system be ready for commissioning in July 2007? Assess the suitability of the design for performing one EP procedure per
week in FY08-09.
Charge to the Committee
The committee report was very positive; manpower critical path
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SCSPF: Superconducting Cavity Surface Processing FacilityLocation: Argonne Building 208 Facility Cost with manpower $2M Safety Review Completed in 2006; 700 man-hours and $100K EP Operations started in 2006
20 m
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SCSPF: ANL Portion
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Commissioning the SCSPF: Electropolishing
Last of 6 QWR for ATLAS Upgrade, May 07
Entry into ANL chemistry room after EP
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Assembling/Testing Hardware for ILC Cavity ProcessingElectropolishing system
mechanical frameCavity handling system for chemistry & clean rooms
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Status of ANL-FNAL collaboration in SRF
ANL-FNAL have had an effective collaboration on electropolishing
EP Design Specification 100% complete EP Engineering Design 100% complete EP Design Review 90% complete EP System/component procurement 90% complete EP system assembly 40% complete
We are on track to perform electropolishing for ILC by July 2007
ANL-FNAL collaborating on high-pressure rinsing for the joint facility; began in April on design/construction (initially de-scoped due to CR in FY07)
Continued effective ANL-FNAL SRF effort require a (more) focused and sustained effort of a (larger) group of technical together with management.
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Additional Material: A Cavity Holding Fixture
Spider Assembly2.5 cm stainless (titanium) tube
clamps here using aluminum “seat” clamp
Pin with expanding diameter “quick” pin
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Additional Material: HPR in G150 facility
Supplied with 18 M-cm deionized water at 20 l/m, up to 3000 PSI
Rinsed and dried in a curtained clean area
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Additional Material: Test of End Group Fri. Feb 9, 2007
Filled with water, rotated shaft on lip seal at 20 rpm, pressurized to 2 PSI First test looks good; long term operation to be tested
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Additional Material
Fluoride specific electrode; untested; requires dilution by ~50X