Baseline recovery method to measure bunch charge under low-current mode of SSRF

Zhichu CHEN; Yongbin LENG; Yi ZOU; Yingbin YAN; Weimin ZHOU

doi:10.13538/j.1001-8042/nst.22.261-264

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Baseline recovery method to measure bunch charge under low-current mode of SSRF

SYNCHROTRON TECHNOLOGY AND APPLICATIONS | 更新时间：2021-01-29

- Baseline recovery method to measure bunch charge under low-current mode of SSRF
- Baseline recovery method to measure bunch charge under low-current mode of SSRF
- 核技术（英文版） 2011年22卷第5期
- 作者机构：
  
  1.Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Shanghai 201800, China
- 作者简介：
  
  Corresponding author. E-mail address: lengyongbin@sinap.ac.cn
  
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- 基金信息：
  
  National Natural Science Foundation of China
- DOI：10.13538/j.1001-8042/nst.22.261-264 中图分类号：
- 纸质出版日期：2011-10-20，
  
  收稿日期：2011-04-25，
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引用本文
Zhichu CHEN, Yongbin LENG, Yi ZOU, 等. Baseline recovery method to measure bunch charge under low-current mode of SSRF[J]. 核技术（英文版）, 2011, 22(5):261-264.

Zhichu CHEN, Yongbin LENG, Yi ZOU, et al. Baseline recovery method to measure bunch charge under low-current mode of SSRF[J]. Nuclear Science and Techniques, 2011, 22(5):261-264.
Zhichu CHEN, Yongbin LENG, Yi ZOU, 等. Baseline recovery method to measure bunch charge under low-current mode of SSRF[J]. 核技术（英文版）, 2011, 22(5):261-264. DOI： 10.13538/j.1001-8042/nst.22.261-264.

Zhichu CHEN, Yongbin LENG, Yi ZOU, et al. Baseline recovery method to measure bunch charge under low-current mode of SSRF[J]. Nuclear Science and Techniques, 2011, 22(5):261-264. DOI： 10.13538/j.1001-8042/nst.22.261-264.

Baseline recovery method to measure bunch charge under low-current mode of SSRF 1 first-author 1 corresp Corresponding author. E-mail address: lengyongbin@sinap.ac.cn Corresponding author. E-mail address: lengyongbin@sinap.ac.cn lengyongbin@sinap.ac.cn 1 1 1 Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Shanghai 201800, China Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Shanghai 201800, China The top-up injection mode of Shanghai Synchrotron Radiation Facility (SSRF) needs precise measurement of the beam bunch charges. This is performed by an integration current transformer, but the beam current is too low to neglect the background noise. In order to wipe out the noise coming from the ground loops, the adaptable polynomial fitting method is used to extract the baseline, instead of using the constant background or the linear background model. Test results show that the system resolution can be improved to <3%. Beam diagnostics ICT Bunch charge monitor Top-up SSRF References Tanaka H , Adachi M , Aoki T , et al . J. Synchrotron Rad , 2006 , 13 : 378 - 391 . J. Synchrotron Rad Lüdeke A , Muñoz M . Proceedings of EPAC , 2002 , 721 - 723 . Proceedings of EPAC Ueng T S , Hsu K T , Chen J , et al . Proceedings of EPAC , 2000 , 1874 - 1876 . Proceedings of EPAC Ohkuma H . Proceedings of EPAC , 2008 , 36 - 40 . Proceedings of EPAC Andras P , Juergen D , Istvan M . Proceedings of EPAC , 2006 , 1196 - 1198 . Proceedings of EPAC Leng Y B , Chen Z C , Zhou W M , Nuclear Techniques , 2009 , 32 : 725 - 728 . Nuclear Techniques Saeed V V , Advanced Digital Signal Processing and Noise Reduction . The Atrium, Southern Gate, Chichester, West Sussex, PO19 8SQ, United Kingdom : John Wiley & Sons, Ltd. , 2009 . Advanced Digital Signal Processing and Noise Reduction 10.13538/j.1001-8042/nst.22.261-264 Supported by National Natural Science Foundation of China (11075198) 2011-04-25 2011-10-20 2021-01-19 2011 Nuclear Science and Techniques 05 22

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