Beams Document 3639-v1

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Superconducting-Niobium Accelerator Cavity Defect Localization and Repair

Document #:
Beams-doc-3639-v1
Document type:
Talk
Submitted by:
Camille M. Ginsburg
Updated by:
Camille M. Ginsburg
Document Created:
16 Jul 2010, 08:07
Contents Revised:
16 Jul 2010, 08:07
Metadata Revised:
16 Jul 2010, 08:07
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Abstract:
Almost all superconducting-niobium accelerator cavities have surface defects and have to be operated at accelerating gradients below the maximum theoretical limit. This increases the cost and complexity of several proposed accelerator facilities, e.g., the International Linear Collider (ILC), the FNAL project-X driver accelerator, and other high-accelerating gradient machines.

Surface defects nucleate normal conducting regions which become unstable and expand once the conductive cooling to the defect is less than the dissipated RF power. This presentation will begin with a review of current state-of-the-art niobium accelerator cavity performance and then focus on Cornell University’s experimental methods for locating defects and how we use them to improve cavity performance. We adopted the ANL second sound defect location technique three years ago and our results will be presented.

Files in Document:
  • pdf file (Superconducting-Niobium Accelerator Cavity Defect Loca...pdf, 7.3 MB)
  • powerpoint file (Superconducting-Niobium Accelerator Cavity Defect Loca...ppt, 10.1 MB)
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