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https://doi.org/10.18429/JACoW-SRF2023-MOPMB020
Title A Comprehensive Picture of Hydride Formation and Dissipation
Authors
  • N. Sitaraman, T. Arias
    Cornell University, Ithaca, New York, USA
  • A.V. Harbick, M.K. Transtrum
    Brigham Young University, Provo, USA
  • M. Liepe
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
Abstract Research linking surface hydrides to Q-disease, and the subsequent development of methods to eliminate surface hydrides, is one of the great successes of SRF cavity R\&D. We use time-dependent Ginzburg-Landau to extend the theory of hydride dissipation to sub-surface hydrides. Just as surface hydrides cause Q-disease behavior, we show that sub-surface hydrides cause high-field Q-slope (HFQS) behavior. We find that the abrupt onset of HFQS is due to a transition from a vortex-free state to a vortex-penetration state. We show that controlling hydride size and depth through impurity doping can eliminate HFQS.
Funding This work was supported by the U.S. National Science Foundation under Award PHY-1549132, the Center for Bright Beams.
Paper download MOPMB020.PDF [2.031 MB / 5 pages]
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Conference SRF2023
Series International Conference on RF Superconductivity (21st)
Location Grand Rapids, MI, USA
Date 25-30 June 2023
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Kenji Saito (FRIB, MSU, East Lansing, MI, USA); Ting Xu (FRIB, MSU, East Lansing, MI, USA); Naruhiko Sakamoto (RIKEN, Wako, Japan); Volker R.W. Schaa (GSI, Darmstadt, Germany); Paul W. Thomas (FRIB, MSU, East Lansing, MI, USA)
Online ISBN 978-3-95450-234-9
Online ISSN 2673-5504
Received 30 June 2023
Revised 18 July 2023
Accepted 19 August 2023
Issue Date 19 August 2023
DOI doi:10.18429/JACoW-SRF2023-MOPMB020
Pages 119-123
Copyright
Creative Commons CC logoPublished by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.