Oak Ridge Spallation Neutron Source superconducting rf linac availability performance and demonstration of operation restoration with superconducting rf cavity off

Morozov, V. S.; Peters, C. C.; Shishlo, A. P.

doi:10.1103/PhysRevAccelBeams.25.020101

Title: Oak Ridge Spallation Neutron Source superconducting rf linac availability performance and demonstration of operation restoration with superconducting rf cavity off

Abstract

Recent advances in superconducting rf (SRF) technology allow for increasingly more reliable and higher power hadron linacs. They hold enormous potential for economic, scientific, medical, environmental, and national security fields. Moving this technology from one of a kind laboratory demonstration devices to industrial scale applications imposes strict requirements on the linac performance in terms of its stability, reliability, and availability. The Spallation Neutron Source (SNS) is currently the highest average power superconducting proton linac in the world that has been routinely operated since 2006. We present statistical data on the SNS SRF linac reliability obtained from its practical operational experience during 2020. We analyze the frequency and duration of SRF cavity trips and identify their causes. These data will show that SRF cavity trips are the most common source of single-point failure within the linac. In an industrial environment, where redundancy is a necessity to prevent interruption of facility operation, the linac beam can be quickly restored by redistributing the failed cavity function to downstream energy reserve SRF cavities. We present a practical demonstration of this approach. We intentionally turn off one of the cavities and recover the beam by readjusting the phases of downstream cavities to maintain the samemore »« less

Authors:

;

Publication Date:: Thu Feb 17 00:00:00 EST 2022

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1845564

Alternate Identifier(s):: OSTI ID: 1907242

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Published Article

Journal Name:: Physical Review Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Accelerators and Beams Journal Volume: 25 Journal Issue: 2; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; beam injection, extraction and transport; beam loss; high intensity beam dynamics; high-intensity accelerators; neutron spallation facilities; reliability and operability

Citation Formats


                    Morozov, V. S., Peters, C. C., and Shishlo, A. P. Oak Ridge Spallation Neutron Source superconducting rf linac availability performance and demonstration of operation restoration with superconducting rf cavity off.  United States: N. p., 2022. 
Web.  doi:10.1103/PhysRevAccelBeams.25.020101.

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                    Morozov, V. S., Peters, C. C., & Shishlo, A. P. Oak Ridge Spallation Neutron Source superconducting rf linac availability performance and demonstration of operation restoration with superconducting rf cavity off.  United States.  https://doi.org/10.1103/PhysRevAccelBeams.25.020101

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                    Morozov, V. S., Peters, C. C., and Shishlo, A. P. Thu .  
"Oak Ridge Spallation Neutron Source superconducting rf linac availability performance and demonstration of operation restoration with superconducting rf cavity off".  United States.  https://doi.org/10.1103/PhysRevAccelBeams.25.020101.

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@article{osti_1845564,

  title        = {Oak Ridge Spallation Neutron Source superconducting rf linac availability performance and demonstration of operation restoration with superconducting rf cavity off},

  author       = {Morozov, V. S. and Peters, C. C. and Shishlo, A. P.},

  abstractNote = {Recent advances in superconducting rf (SRF) technology allow for increasingly more reliable and higher power hadron linacs. They hold enormous potential for economic, scientific, medical, environmental, and national security fields. Moving this technology from one of a kind laboratory demonstration devices to industrial scale applications imposes strict requirements on the linac performance in terms of its stability, reliability, and availability. The Spallation Neutron Source (SNS) is currently the highest average power superconducting proton linac in the world that has been routinely operated since 2006. We present statistical data on the SNS SRF linac reliability obtained from its practical operational experience during 2020. We analyze the frequency and duration of SRF cavity trips and identify their causes. These data will show that SRF cavity trips are the most common source of single-point failure within the linac. In an industrial environment, where redundancy is a necessity to prevent interruption of facility operation, the linac beam can be quickly restored by redistributing the failed cavity function to downstream energy reserve SRF cavities. We present a practical demonstration of this approach. We intentionally turn off one of the cavities and recover the beam by readjusting the phases of downstream cavities to maintain the same linac beam energy output. We discuss limitations of this approach at SNS and how they can be overcome.},

  doi          = {10.1103/PhysRevAccelBeams.25.020101},

  journal      = {Physical Review Accelerators and Beams},

  number       = 2,

  volume       = 25,

  place        = {United States},

  year         = {Thu Feb 17 00:00:00 EST 2022},

  month        = {Thu Feb 17 00:00:00 EST 2022}

}

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Works referenced in this record:

Laser-assisted charge exchange as an atomic yardstick for proton beam energy measurement and phase probe calibration
journal, March 2021

Wong, Jonathan C.; Aleksandrov, Alexander; Cousineau, Sarah
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Yee-Rendon, Bruce; Tamura, Jun; Kondo, Yasuhiro
Proceedings of the 3rd J-PARC Symposium (J-PARC2019)
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Title: Oak Ridge Spallation Neutron Source superconducting rf linac availability performance and demonstration of operation restoration with superconducting rf cavity off

Abstract

Citation Formats

Laser-assisted charge exchange as an atomic yardstick for proton beam energy measurement and phase probe calibration journal, March 2021

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Simultaneous optimization of the cavity heat load and trip rates in linacs using a genetic algorithm journal, October 2014

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Laser-assisted charge exchange as an atomic yardstick for proton beam energy measurement and phase probe calibration
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journal, October 2014

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journal, January 2020

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journal, November 2014

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conference, March 2021