Plasma processing to improve the performance of the SNS superconducting linac

M. Doleans, R. Afanador, J. A. Ball, D. L. Barnhart, W. Blokland, M. T. Crofford, B. D. Degraff, S. W. Gold, B. S. Hannah, M. P. Howell, S. H. Kim, S. W. Lee, J. Mammosser, C. J. McMahan, T. S. Neustadt, J. W. Saunders, S. Stewart, W. H. Strong, P. V. Tyagi, D. J. VandygriffD. M. Vandygriff

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

An in-situ plasma processing technique has been developed at the Spallation Neutron Source (SNS) to improve the performance of the superconducting radio-frequency (SRF) cavities in operation. The technique uses a low-density reactive neon-oxygen plasma at room-temperature to improve the surface work function, to help removing adsorbed gases on the RF surface and to reduce its secondary emission yield. Recently, the plasma processing technique has been applied to one offline cryomodule and to two cryomodules in the linac tunnel. Improvement of the accelerating gradient has been observed in all three cryomodules.

Original languageEnglish
Title of host publicationProceedings of the 28th Linear Accelerator Conference, LINAC 2016
PublisherJACoW Publishing
Pages679-682
Number of pages4
ISBN (Electronic)9783954501694
StatePublished - 2016
Event28th International Linear Accelerator Conference, LINAC 2016 - East Lansing, United States
Duration: Sep 25 2016Sep 30 2016

Publication series

NameProceedings of the 28th Linear Accelerator Conference, LINAC 2016

Conference

Conference28th International Linear Accelerator Conference, LINAC 2016
Country/TerritoryUnited States
CityEast Lansing
Period09/25/1609/30/16

Funding

Many thanks to S. Zhukov and A. Webster for helping with the radiation monitors. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract Number DE-AC05-00OR22725. This research used resources of the Spallation Neutron Source, which is a DOE Office of Science User Facility.

FundersFunder number
U.S. Department of Energy
Office of Science
Basic Energy SciencesDE-AC05-00OR22725

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