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Title: Ignition and monitoring technique for plasma processing of multicell superconducting radio-frequency cavities

In this study, 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 remove adsorbed gases on the RF surface and to reduce its secondary emission yield. SNS SRF cavities are six-cell elliptical cavities and the plasma typically ignites in the cell where the electric field is the highest. This article will detail a technique that was developed to ignite and monitor the plasma in each cell of the SNS cavities.
Authors:
ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 24; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Plasma processes; Radiofrequency discharges; Superconductivity; Particle accelerators
OSTI Identifier:
1338535
Alternate Identifier(s):
OSTI ID: 1337589

Doleans, Marc. Ignition and monitoring technique for plasma processing of multicell superconducting radio-frequency cavities. United States: N. p., Web. doi:10.1063/1.4972838.
Doleans, Marc. Ignition and monitoring technique for plasma processing of multicell superconducting radio-frequency cavities. United States. doi:10.1063/1.4972838.
Doleans, Marc. 2016. "Ignition and monitoring technique for plasma processing of multicell superconducting radio-frequency cavities". United States. doi:10.1063/1.4972838. https://www.osti.gov/servlets/purl/1338535.
@article{osti_1338535,
title = {Ignition and monitoring technique for plasma processing of multicell superconducting radio-frequency cavities},
author = {Doleans, Marc},
abstractNote = {In this study, 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 remove adsorbed gases on the RF surface and to reduce its secondary emission yield. SNS SRF cavities are six-cell elliptical cavities and the plasma typically ignites in the cell where the electric field is the highest. This article will detail a technique that was developed to ignite and monitor the plasma in each cell of the SNS cavities.},
doi = {10.1063/1.4972838},
journal = {Journal of Applied Physics},
number = 24,
volume = 120,
place = {United States},
year = {2016},
month = {12}
}