Production and Testing Experience with the SRF Cavities for the CEBAF 12 GeV Upgrade

Conference · Thu Sep 01 04:00:00 EDT 2011

OSTI ID:1029313

The CEBAF recirculating CW electron linear accelerator at Jefferson Lab is presently undergoing a major upgrade to 12 GeV. This project includes the fabrication, preparation, and testing of 80 new 7-cell SRF cavities, followed by their incorporation into ten new cryomodules for subsequent testing and installation. In order to maximize the cavity Q over the full operable dynamic range in CEBAF (as high as 25 MV/m), the decision was taken to apply a streamlined preparation process that includes a final light temperature-controlled electropolish of the rf surface over the vendor-provided bulk BCP etch. Cavity processing work began at JLab in September 2010 and will continue through December 2011. The excellent performance results are exceeding project requirements and indicate a fabrication and preparation process that is stable and well controlled. The cavity production and performance experience to date will be summarized and lessons learned reported to the community.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1029313
• Report Number(s): JLAB-ACC-11-1447; DOE/OR/23177-1905
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CAVITIES
ELECTRONS
FABRICATION
LINEAR ACCELERATORS
PERFORMANCE
PROCESSING
PRODUCTION
TESTING