Broadband feedback system for instability damping in the SNS ring

N. J. Evans

Broadband feedback system for instability damping in the SNS ring

N. J. Evans

Accelerator Science & Technology

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

1 Scopus citations

Abstract

The transverse feedback system in the Accumulator Ring of the Spallation Neutron Source (SNS) is intended to damp broadband (≈40-120 MHz), coherent betatron motion due to e-p interaction. The SNS feedback system is based on an analog delay-line model with some signal conditioning and tuning parameters implemented digitally. This system provides a simple setup with two primary knobs, phase and gain, as well as an equalizer. This simplicity comes at the cost of some flexibility normally found in a standard mode-by-mode design, namely mode-by-mode phase, and gain control. In this paper we discuss the design, tuning, evaluation, and operation of the SNS feedback damper, and discuss the tradeoffs implicit in the design of the system.

Original language	English
Title of host publication	HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams
Publisher	Joint Accelerator Conferences Website (JACoW)
Pages	288-292
Number of pages	5
ISBN (Electronic)	9783954501854
State	Published - Aug 1 2016
Event	57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams, HB 2016 - Malmo, Sweden Duration: Jul 3 2016 → Jul 8 2016

Publication series

Name	HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams

Conference

Conference	57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams, HB 2016
Country/Territory	Sweden
City	Malmo
Period	07/3/16 → 07/8/16

Funding

∗ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. † [email protected]

Cite this

Evans, N. J. (2016). Broadband feedback system for instability damping in the SNS ring. In HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams (pp. 288-292). (HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams). Joint Accelerator Conferences Website (JACoW).

Evans, N. J. / Broadband feedback system for instability damping in the SNS ring. HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams. Joint Accelerator Conferences Website (JACoW), 2016. pp. 288-292 (HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams).

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abstract = "The transverse feedback system in the Accumulator Ring of the Spallation Neutron Source (SNS) is intended to damp broadband (≈40-120 MHz), coherent betatron motion due to e-p interaction. The SNS feedback system is based on an analog delay-line model with some signal conditioning and tuning parameters implemented digitally. This system provides a simple setup with two primary knobs, phase and gain, as well as an equalizer. This simplicity comes at the cost of some flexibility normally found in a standard mode-by-mode design, namely mode-by-mode phase, and gain control. In this paper we discuss the design, tuning, evaluation, and operation of the SNS feedback damper, and discuss the tradeoffs implicit in the design of the system.",

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Evans, NJ 2016, Broadband feedback system for instability damping in the SNS ring. in HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams. HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams, Joint Accelerator Conferences Website (JACoW), pp. 288-292, 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams, HB 2016, Malmo, Sweden, 07/3/16.

Broadband feedback system for instability damping in the SNS ring. / Evans, N. J.
HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams. Joint Accelerator Conferences Website (JACoW), 2016. p. 288-292 (HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams).

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

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AB - The transverse feedback system in the Accumulator Ring of the Spallation Neutron Source (SNS) is intended to damp broadband (≈40-120 MHz), coherent betatron motion due to e-p interaction. The SNS feedback system is based on an analog delay-line model with some signal conditioning and tuning parameters implemented digitally. This system provides a simple setup with two primary knobs, phase and gain, as well as an equalizer. This simplicity comes at the cost of some flexibility normally found in a standard mode-by-mode design, namely mode-by-mode phase, and gain control. In this paper we discuss the design, tuning, evaluation, and operation of the SNS feedback damper, and discuss the tradeoffs implicit in the design of the system.

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M3 - Conference contribution

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Evans NJ. Broadband feedback system for instability damping in the SNS ring. In HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams. Joint Accelerator Conferences Website (JACoW). 2016. p. 288-292. (HB 2016 - Proceedings of the 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams).

Broadband feedback system for instability damping in the SNS ring

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