Overview of ten-year operation of the superconducting linear accelerator at the Spallation Neutron Source

Kim, Sang-Ho; Afanador, Ralph; Barnhart, Debra L.; Crofford, Mark T.; Degraff, Brian D.; Doleans, Marc; Galambos, John D.; Gold, Steven W.; Howell, Matthew P.; Mammosser, John; McMahan, Christopher J.; Neustadt, Thomas S.; Peters, Charles C.; Saunders, Jeffrey W.; Strong, William Herb; Vandygriff, Daniel J.; Vandygriff, D. M.

doi:10.1016/j.nima.2017.02.009

Title: Overview of ten-year operation of the superconducting linear accelerator at the Spallation Neutron Source

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Abstract

The Spallation Neutron Source (SNS) has acquired extensive operational experience of a pulsed proton superconducting linear accelerator (SCL) as a user facility. Numerous lessons have been learned in its first 10 years operation to achieve a stable and reliable operation of the SCL. In this paper, an overview of the SNS SCL design, qualification of superconducting radio frequency (SRF) cavities and ancillary subsystems, an overview of the SNS cryogenic system, the SCL operation including SCL output energy history and downtime statistics, performance stability of the SRF cavities, efforts for SRF cavity performance recovery and improvement at the SNS, and maintenance activities for cryomodules are introduced.

Authors:

Kim, Sang-Ho ^[1]; Afanador, Ralph ^[1]; Barnhart, Debra L. ^[1]; Crofford, Mark T. ^[1]; Degraff, Brian D. ^[1]; Doleans, Marc ^[1]; Galambos, John D. ^[1]; Gold, Steven W. ^[1]; Howell, Matthew P. ^[1]; Mammosser, John ^[1]; McMahan, Christopher J. ^[1]; Neustadt, Thomas S. ^[1]; Peters, Charles C. ^[1]; Saunders, Jeffrey W. ^[1]; Strong, William Herb ^[1]; Vandygriff, Daniel J. ^[1]; Vandygriff, D. M. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Sat Feb 04 00:00:00 EST 2017

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1345779

Alternate Identifier(s):: OSTI ID: 1412012

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

Additional Journal Information:: Journal Volume: 852; Journal Issue: C; Journal ID: ISSN 0168-9002

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; Superconducting linear accelerator; Superconducting radio-frequency cavity; Pulsed operation; Spallation neutron source

Citation Formats


                    Kim, Sang-Ho, Afanador, Ralph, Barnhart, Debra L., Crofford, Mark T., Degraff, Brian D., Doleans, Marc, Galambos, John D., Gold, Steven W., Howell, Matthew P., Mammosser, John, McMahan, Christopher J., Neustadt, Thomas S., Peters, Charles C., Saunders, Jeffrey W., Strong, William Herb, Vandygriff, Daniel J., and Vandygriff, D. M. Overview of ten-year operation of the superconducting linear accelerator at the Spallation Neutron Source.  United States: N. p., 2017. 
Web.  doi:10.1016/j.nima.2017.02.009.

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                    Kim, Sang-Ho, Afanador, Ralph, Barnhart, Debra L., Crofford, Mark T., Degraff, Brian D., Doleans, Marc, Galambos, John D., Gold, Steven W., Howell, Matthew P., Mammosser, John, McMahan, Christopher J., Neustadt, Thomas S., Peters, Charles C., Saunders, Jeffrey W., Strong, William Herb, Vandygriff, Daniel J., & Vandygriff, D. M. Overview of ten-year operation of the superconducting linear accelerator at the Spallation Neutron Source.  United States.  https://doi.org/10.1016/j.nima.2017.02.009

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                    Kim, Sang-Ho, Afanador, Ralph, Barnhart, Debra L., Crofford, Mark T., Degraff, Brian D., Doleans, Marc, Galambos, John D., Gold, Steven W., Howell, Matthew P., Mammosser, John, McMahan, Christopher J., Neustadt, Thomas S., Peters, Charles C., Saunders, Jeffrey W., Strong, William Herb, Vandygriff, Daniel J., and Vandygriff, D. M. Sat .  
"Overview of ten-year operation of the superconducting linear accelerator at the Spallation Neutron Source".  United States.  https://doi.org/10.1016/j.nima.2017.02.009.  https://www.osti.gov/servlets/purl/1345779.

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@article{osti_1345779,

  title        = {Overview of ten-year operation of the superconducting linear accelerator at the Spallation Neutron Source},

  author       = {Kim, Sang-Ho and Afanador, Ralph and Barnhart, Debra L. and Crofford, Mark T. and Degraff, Brian D. and Doleans, Marc and Galambos, John D. and Gold, Steven W. and Howell, Matthew P. and Mammosser, John and McMahan, Christopher J. and Neustadt, Thomas S. and Peters, Charles C. and Saunders, Jeffrey W. and Strong, William Herb and Vandygriff, Daniel J. and Vandygriff, D. M.},

  abstractNote = {The Spallation Neutron Source (SNS) has acquired extensive operational experience of a pulsed proton superconducting linear accelerator (SCL) as a user facility. Numerous lessons have been learned in its first 10 years operation to achieve a stable and reliable operation of the SCL. In this paper, an overview of the SNS SCL design, qualification of superconducting radio frequency (SRF) cavities and ancillary subsystems, an overview of the SNS cryogenic system, the SCL operation including SCL output energy history and downtime statistics, performance stability of the SRF cavities, efforts for SRF cavity performance recovery and improvement at the SNS, and maintenance activities for cryomodules are introduced.},

  doi          = {10.1016/j.nima.2017.02.009},

  journal      = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},

  number       = C,

  volume       = 852,

  place        = {United States},

  year         = {Sat Feb 04 00:00:00 EST 2017},

  month        = {Sat Feb 04 00:00:00 EST 2017}

}

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