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