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. Vandygriff; D. M. Vandygriff

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 proceeding › Conference contribution › peer-review

4 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 language	English
Title of host publication	Proceedings of the 28th Linear Accelerator Conference, LINAC 2016
Publisher	JACoW Publishing
Pages	679-682
Number of pages	4
ISBN (Electronic)	9783954501694
State	Published - 2016
Event	28th International Linear Accelerator Conference, LINAC 2016 - East Lansing, United States Duration: Sep 25 2016 → Sep 30 2016

Publication series

Name	Proceedings of the 28th Linear Accelerator Conference, LINAC 2016

Conference

Conference	28th International Linear Accelerator Conference, LINAC 2016
Country/Territory	United States
City	East Lansing
Period	09/25/16 → 09/30/16

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.

Cite this

Doleans, M., Afanador, R., Ball, J. A., Barnhart, D. L., Blokland, W., Crofford, M. T., Degraff, B. D., Gold, S. W., Hannah, B. S., Howell, M. P., Kim, S. H., Lee, S. W., Mammosser, J., McMahan, C. J., Neustadt, T. S., Saunders, J. W., Stewart, S., Strong, W. H., Tyagi, P. V., ... Vandygriff, D. M. (2016). Plasma processing to improve the performance of the SNS superconducting linac. In Proceedings of the 28th Linear Accelerator Conference, LINAC 2016 (pp. 679-682). (Proceedings of the 28th Linear Accelerator Conference, LINAC 2016). JACoW Publishing.

@inproceedings{3d172b10a4e14df9b039e84b8aaa3794,

title = "Plasma processing to improve the performance of the SNS superconducting linac",

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.",

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

note = "Publisher Copyright: Copyright {\textcopyright} 2017 CC-BY-3.0 and by the respective authors.; 28th International Linear Accelerator Conference, LINAC 2016 ; Conference date: 25-09-2016 Through 30-09-2016",

year = "2016",

language = "English",

series = "Proceedings of the 28th Linear Accelerator Conference, LINAC 2016",

publisher = "JACoW Publishing",

pages = "679--682",

booktitle = "Proceedings of the 28th Linear Accelerator Conference, LINAC 2016",

}

Doleans, M, Afanador, R, Ball, JA, Barnhart, DL, Blokland, W , Crofford, MT , Degraff, BD, Gold, SW, Hannah, BS, Howell, MP , Kim, SH , Lee, SW, Mammosser, J, McMahan, CJ, Neustadt, TS, Saunders, JW , Stewart, S, Strong, WH, Tyagi, PV, Vandygriff, DJ & Vandygriff, DM 2016, Plasma processing to improve the performance of the SNS superconducting linac. in Proceedings of the 28th Linear Accelerator Conference, LINAC 2016. Proceedings of the 28th Linear Accelerator Conference, LINAC 2016, JACoW Publishing, pp. 679-682, 28th International Linear Accelerator Conference, LINAC 2016, East Lansing, United States, 09/25/16.

Plasma processing to improve the performance of the SNS superconducting linac. / Doleans, M.; Afanador, R.; Ball, J. A. et al.
Proceedings of the 28th Linear Accelerator Conference, LINAC 2016. JACoW Publishing, 2016. p. 679-682 (Proceedings of the 28th Linear Accelerator Conference, LINAC 2016).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Plasma processing to improve the performance of the SNS superconducting linac

AU - Doleans, M.

AU - Afanador, R.

AU - Ball, J. A.

AU - Barnhart, D. L.

AU - Blokland, W.

AU - Crofford, M. T.

AU - Degraff, B. D.

AU - Gold, S. W.

AU - Hannah, B. S.

AU - Howell, M. P.

AU - Kim, S. H.

AU - Lee, S. W.

AU - Mammosser, J.

AU - McMahan, C. J.

AU - Neustadt, T. S.

AU - Saunders, J. W.

AU - Stewart, S.

AU - Strong, W. H.

AU - Tyagi, P. V.

AU - Vandygriff, D. J.

AU - Vandygriff, D. M.

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

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M3 - Conference contribution

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T3 - Proceedings of the 28th Linear Accelerator Conference, LINAC 2016

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BT - Proceedings of the 28th Linear Accelerator Conference, LINAC 2016

PB - JACoW Publishing

T2 - 28th International Linear Accelerator Conference, LINAC 2016

Y2 - 25 September 2016 through 30 September 2016

ER -

Plasma processing to improve the performance of the SNS superconducting linac

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