Operation experiences of the bunch-by-bunch feedback system for TLS

Author

Hu, K.H. ; Lee, Demi ; Hsu, S.Y. ; Chiu, P.C. ; Kuo, C.H. ; Chen, Jenny ; Hsu, K.T.

Author_Institution

Nat. Synchrotron Radiat. Res. Center, Hsinchu

fYear

2007

fDate

25-29 June 2007

Firstpage

383

Lastpage

385

Abstract

Severe multi-bunch instabilities have deteriorated the performance of Taiwan light source (TLS) during the operation since SRF system upgrade in 2004. FPGA-based bunch-by-bunch feedback system was commissioning during late 2005 and early 2006. Multi-bunch instabilities in both transverse and longitudinal are damped effectively. Delivery up to 400 mA stored beam was demonstrated. Transverse feedback system makes low chromaticity operation possible; this is very helpful to improve injection efficiency which is essential for routine top-up operation. Operation experiences of the bunch-by-bunch feedback system will be summarized in this report.

Keywords

feedback; field programmable gate arrays; nuclear electronics; particle beam bunching; particle beam injection; particle beam stability; storage rings; FPGA-based bunch-by-bunch feedback system; SRF system upgrade; TLS; Taiwan light source; feedback electronics; field programmable gate arrays; injection efficiency; low chromaticity operation; multibunch instabilities; storage ring; Control systems; Delay; Feedback loop; Field programmable gate arrays; Finite impulse response filter; Light sources; Phase detection; Radio frequency; Signal processing; Storage rings;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440219

Filename

4440219