Active damping of the E-P instability at the LANL PSR

R. McCrady; R. Macek; T. Zaugg; S. Assadi; C. Deibele; S. Henderson; M. Plum; S. Y. Lee; S. Walbridge; J. Byrd; M. Pivi

doi:10.1109/PAC.2007.4440274

Active damping of the E-P instability at the LANL PSR

R. McCrady, R. Macek, T. Zaugg, S. Assadi, C. Deibele, S. Henderson, M. Plum, S. Y. Lee, S. Walbridge, J. Byrd, M. Pivi

Fusion Energy Division

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

1 Scopus citations

Abstract

A prototype of an analog, transverse (vertical) feedback system for active damping of the two-stream (e-p) instability has been developed and successfully tested at the Los Alamos National Laboratory Proton Storage Ring (PSR). This system was able to improve the instability threshold by approximately 30% (as measured by the change in RF buncher voltage at instability threshold). Evidence obtained from these tests suggests that further improvement in performance is limited by beam leakage into the gap at lower RF buncher voltage and the onset of instability in the horizontal plane, which had no feedback. Here we describe the present system configuration, system optimization, results of several recent experimental tests, and results from studies of factors limiting its performance.

Original language	English
Title of host publication	Proceedings of the IEEE Particle Accelerator Conference, PAC07
Pages	548-550
Number of pages	3
DOIs	https://doi.org/10.1109/PAC.2007.4440274
State	Published - 2007
Event	IEEE Particle Accelerator Conference, PAC07 - Albuquerque, NM, United States Duration: Jun 25 2007 → Jun 29 2007

Publication series

Name	Proceedings of the IEEE Particle Accelerator Conference

Conference

Conference	IEEE Particle Accelerator Conference, PAC07
Country/Territory	United States
City	Albuquerque, NM
Period	06/25/07 → 06/29/07

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10.1109/PAC.2007.4440274

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McCrady, R., Macek, R., Zaugg, T., Assadi, S., Deibele, C., Henderson, S., Plum, M., Lee, S. Y., Walbridge, S., Byrd, J., & Pivi, M. (2007). Active damping of the E-P instability at the LANL PSR. In Proceedings of the IEEE Particle Accelerator Conference, PAC07 (pp. 548-550). Article 4440274 (Proceedings of the IEEE Particle Accelerator Conference). https://doi.org/10.1109/PAC.2007.4440274

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title = "Active damping of the E-P instability at the LANL PSR",

abstract = "A prototype of an analog, transverse (vertical) feedback system for active damping of the two-stream (e-p) instability has been developed and successfully tested at the Los Alamos National Laboratory Proton Storage Ring (PSR). This system was able to improve the instability threshold by approximately 30% (as measured by the change in RF buncher voltage at instability threshold). Evidence obtained from these tests suggests that further improvement in performance is limited by beam leakage into the gap at lower RF buncher voltage and the onset of instability in the horizontal plane, which had no feedback. Here we describe the present system configuration, system optimization, results of several recent experimental tests, and results from studies of factors limiting its performance.",

author = "R. McCrady and R. Macek and T. Zaugg and S. Assadi and C. Deibele and S. Henderson and M. Plum and Lee, {S. Y.} and S. Walbridge and J. Byrd and M. Pivi",

year = "2007",

doi = "10.1109/PAC.2007.4440274",

language = "English",

isbn = "1424409179",

series = "Proceedings of the IEEE Particle Accelerator Conference",

pages = "548--550",

booktitle = "Proceedings of the IEEE Particle Accelerator Conference, PAC07",

note = "IEEE Particle Accelerator Conference, PAC07 ; Conference date: 25-06-2007 Through 29-06-2007",

}

McCrady, R, Macek, R, Zaugg, T, Assadi, S, Deibele, C, Henderson, S, Plum, M, Lee, SY, Walbridge, S, Byrd, J & Pivi, M 2007, Active damping of the E-P instability at the LANL PSR. in Proceedings of the IEEE Particle Accelerator Conference, PAC07., 4440274, Proceedings of the IEEE Particle Accelerator Conference, pp. 548-550, IEEE Particle Accelerator Conference, PAC07, Albuquerque, NM, United States, 06/25/07. https://doi.org/10.1109/PAC.2007.4440274

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T1 - Active damping of the E-P instability at the LANL PSR

AU - McCrady, R.

AU - Macek, R.

AU - Zaugg, T.

AU - Assadi, S.

AU - Deibele, C.

AU - Henderson, S.

AU - Plum, M.

AU - Lee, S. Y.

AU - Walbridge, S.

AU - Byrd, J.

AU - Pivi, M.

PY - 2007

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N2 - A prototype of an analog, transverse (vertical) feedback system for active damping of the two-stream (e-p) instability has been developed and successfully tested at the Los Alamos National Laboratory Proton Storage Ring (PSR). This system was able to improve the instability threshold by approximately 30% (as measured by the change in RF buncher voltage at instability threshold). Evidence obtained from these tests suggests that further improvement in performance is limited by beam leakage into the gap at lower RF buncher voltage and the onset of instability in the horizontal plane, which had no feedback. Here we describe the present system configuration, system optimization, results of several recent experimental tests, and results from studies of factors limiting its performance.

AB - A prototype of an analog, transverse (vertical) feedback system for active damping of the two-stream (e-p) instability has been developed and successfully tested at the Los Alamos National Laboratory Proton Storage Ring (PSR). This system was able to improve the instability threshold by approximately 30% (as measured by the change in RF buncher voltage at instability threshold). Evidence obtained from these tests suggests that further improvement in performance is limited by beam leakage into the gap at lower RF buncher voltage and the onset of instability in the horizontal plane, which had no feedback. Here we describe the present system configuration, system optimization, results of several recent experimental tests, and results from studies of factors limiting its performance.

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DO - 10.1109/PAC.2007.4440274

M3 - Conference contribution

AN - SCOPUS:51349100440

SN - 1424409179

SN - 9781424409174

T3 - Proceedings of the IEEE Particle Accelerator Conference

SP - 548

EP - 550

BT - Proceedings of the IEEE Particle Accelerator Conference, PAC07

T2 - IEEE Particle Accelerator Conference, PAC07

Y2 - 25 June 2007 through 29 June 2007

ER -

Active damping of the E-P instability at the LANL PSR

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