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Title: New Transverse Bunch-by-Bunch Feedback System at TLS

Abstract

An FPGA based transverse bunch-by-bunch feedback system was implemented and commissioned to replace the existing analog transverse feedback system in order to suppress more effectively multi-bunch instabilities caused by the resistive wall of the vacuum chamber, cavity-like structures and ions related instability. This system replaces existing analog transverse feedback system to enlarge the tunability of the working point. Lower chromaticity is possible with feedback system that is very helpful for injection efficiency improvement. Top-up and high current operation is benefit for this upgrade. One feedback loop suppresses horizontal and vertical multi-bunch instabilities simultaneously. The clean and simple structure makes the system simple and reliable. This study also presents the preliminary result of commissioning the new transverse feedback system.

Authors:
; ; ; ; ; ;  [1]; ;  [2]
  1. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China)
  2. JASRI/SPring-8, Hyogo (Japan)
Publication Date:
OSTI Identifier:
21049310
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436028; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM BUNCHING; BEAM CURRENTS; COMMISSIONING; CONTROL SYSTEMS; EFFICIENCY; INSTABILITY; LIGHT SOURCES; OPERATION; PARTICLE BEAMS; SYNCHROTRON RADIATION

Citation Formats

Hu, K. H., Kuo, C. H., Hsu, S. Y., Lee, Demi, Chen, Jenny, Wang, C. J., Hsu, K. T., Kobayashi, K., and Nakamura, T.. New Transverse Bunch-by-Bunch Feedback System at TLS. United States: N. p., 2007. Web. doi:10.1063/1.2436028.
Hu, K. H., Kuo, C. H., Hsu, S. Y., Lee, Demi, Chen, Jenny, Wang, C. J., Hsu, K. T., Kobayashi, K., & Nakamura, T.. New Transverse Bunch-by-Bunch Feedback System at TLS. United States. doi:10.1063/1.2436028.
Hu, K. H., Kuo, C. H., Hsu, S. Y., Lee, Demi, Chen, Jenny, Wang, C. J., Hsu, K. T., Kobayashi, K., and Nakamura, T.. Fri . "New Transverse Bunch-by-Bunch Feedback System at TLS". United States. doi:10.1063/1.2436028.
@article{osti_21049310,
title = {New Transverse Bunch-by-Bunch Feedback System at TLS},
author = {Hu, K. H. and Kuo, C. H. and Hsu, S. Y. and Lee, Demi and Chen, Jenny and Wang, C. J. and Hsu, K. T. and Kobayashi, K. and Nakamura, T.},
abstractNote = {An FPGA based transverse bunch-by-bunch feedback system was implemented and commissioned to replace the existing analog transverse feedback system in order to suppress more effectively multi-bunch instabilities caused by the resistive wall of the vacuum chamber, cavity-like structures and ions related instability. This system replaces existing analog transverse feedback system to enlarge the tunability of the working point. Lower chromaticity is possible with feedback system that is very helpful for injection efficiency improvement. Top-up and high current operation is benefit for this upgrade. One feedback loop suppresses horizontal and vertical multi-bunch instabilities simultaneously. The clean and simple structure makes the system simple and reliable. This study also presents the preliminary result of commissioning the new transverse feedback system.},
doi = {10.1063/1.2436028},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}