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Apparatus and process for passivating an SRF cavity

United States Patent

8,903,464
December 2, 2014
View the Complete Patent at the US Patent & Trademark Office
Thomas Jefferson National Accelerator Facility - Visit the Technology Review Committee Website
An apparatus and process for the production of a niobium cavity exhibiting high quality factors at high gradients is provided. The apparatus comprises a first chamber positioned within a second chamber, an RF generator and vacuum pumping systems. The process comprises placing the niobium cavity in a first chamber of the apparatus; thermally treating the cavity by high temperature in the first chamber while maintaining high vacuum in the first and second chambers; and applying a passivating thin film layer to a surface of the cavity in the presence of a gaseous mixture and an RF field. Further a niobium cavity exhibiting high quality factors at high gradients produced by the method of the invention is provided.
Myneni; Ganapati Rao (Yorktown, VA), Wallace; John P. (Weyers Cave, VA)
Jefferson Science Associates, LLC (Newport News, VA)
12/ 925,503
October 23, 2010
The United States government may have certain rights to this invention under Management and Operating Contract No.DE-AC05-06OR23177 from Department of Energy.