Damping the e-p instability in the SNS accumulator ring

N. J. Evans; C. Deibele; A. Aleksandrov; Z. Xie

doi:10.1016/j.nima.2017.11.051

Damping the e-p instability in the SNS accumulator ring

N. J. Evans, C. Deibele, A. Aleksandrov, Z. Xie

Research output: Contribution to journal › Article › peer-review

Abstract

A broadband, digital damper system for both transverse planes developed for the SNS accumulator ring has recently damped the first indications of the broadband 50–150 MHz e-p instability in a 1.2 MW neutron production beam. This paper presents details of the design and operation of the SNS damper system as well as results of active damping of the e-p instability in the SNS ring showing a reduction in power of betatron oscillation over the 10–300 MHz band of up to 70%. The spectral content of the beam during operation, with and without the damper system is presented and performance of the damper system is evaluated.

Original language	English
Pages (from-to)	21-29
Number of pages	9
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	885
DOIs	https://doi.org/10.1016/j.nima.2017.11.051
State	Published - Mar 21 2018

Funding

The authors would like to thank Jeff Bryan, Sarah Cousineau, Richard Dickson, Charles Peters, and Mike Plum for their help conducting this work, and preparing the manuscript. SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy.

Funders	Funder number
UT-Battelle
U.S. Department of Energy	DE-AC05-00OR22725

Keywords

Beam instrumentation
Feedback
Particle accelerators

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10.1016/j.nima.2017.11.051

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abstract = "A broadband, digital damper system for both transverse planes developed for the SNS accumulator ring has recently damped the first indications of the broadband 50–150 MHz e-p instability in a 1.2 MW neutron production beam. This paper presents details of the design and operation of the SNS damper system as well as results of active damping of the e-p instability in the SNS ring showing a reduction in power of betatron oscillation over the 10–300 MHz band of up to 70%. The spectral content of the beam during operation, with and without the damper system is presented and performance of the damper system is evaluated.",

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AU - Evans, N. J.

AU - Deibele, C.

AU - Aleksandrov, A.

AU - Xie, Z.

PY - 2018/3/21

Y1 - 2018/3/21

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AB - A broadband, digital damper system for both transverse planes developed for the SNS accumulator ring has recently damped the first indications of the broadband 50–150 MHz e-p instability in a 1.2 MW neutron production beam. This paper presents details of the design and operation of the SNS damper system as well as results of active damping of the e-p instability in the SNS ring showing a reduction in power of betatron oscillation over the 10–300 MHz band of up to 70%. The spectral content of the beam during operation, with and without the damper system is presented and performance of the damper system is evaluated.

KW - Beam instrumentation

KW - Feedback

KW - Particle accelerators

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JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Damping the e-p instability in the SNS accumulator ring

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