Multi-bunch instability diagnostics via transverse feedback system in Shanghai Synchrotron Radiation Facility

Zhang Ning; Lai Longwei; Yuan Renxian; Yu Luyang

doi:10.11884/HPLPB202133.200212

Volume 33 Issue 4

May 2021

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Zhang Ning, Lai Longwei, Yuan Renxian, et al. Multi-bunch instability diagnostics via transverse feedback system in Shanghai Synchrotron Radiation Facility[J]. High Power Laser and Particle Beams, 2021, 33: 044003. doi: 10.11884/HPLPB202133.200212

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Zhang Ning, Lai Longwei, Yuan Renxian, et al. Multi-bunch instability diagnostics via transverse feedback system in Shanghai Synchrotron Radiation Facility[J]. High Power Laser and Particle Beams, 2021, 33: 044003. doi: 10.11884/HPLPB202133.200212

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Multi-bunch instability diagnostics via transverse feedback system in Shanghai Synchrotron Radiation Facility

doi: 10.11884/HPLPB202133.200212

Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China

Received Date: 2020-07-22
Rev Recd Date: 2020-12-08

Available Online: 2021-02-28

Publish Date: 2021-05-02

Abstract

Abstract

For investigating and tracing the multi-bunch transverse coupled instability caused by beam impedance and evaluating the suppressive effect to the instability by the newly updated Transverse Feedback System during the upgrade process of Shanghai Synchrotron Radiation Facility (SSRF) PHASE II, transverse beam motion in different states were recorded by diagnostics tool of feedback processor in the system, by which the evolution of dominate instability modes were analyzed respectively in steady-state, injection transient and growing-damping process. Growth/Damp rate as well as dependence of growth rate and beam current were calculated. Also, performance of the feedback system was evaluated. These research results provide data support for machine operation optimization.
- transverse coupled instability,
- growth/damp rate,
- transverse feedback,
- transient diagnostics,
- Shanghai Synchrotron Radiation Facility

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References(11)

References

[1]	Jaeschke E J, Khan S, Schneider J R, et al. Synchrotron Light Sources and free-electron lasers[M]. Switzerland: Springer Reference, 2016: 606-615.
[2]	Teytelman D. Architectures and algorithms for control and diagnostics of coupled-bunch instabilities in circular accelerators[D]. Stanford: Stanford University, 2003: 1-17.
[3]	Fox J, Larsen R, Prabhakar S, et al. Multi-bunch instability diagnostics via digital feedback systems at PEP-II, DA/spl Phi/NE, ALS and SPEAR[C]//Proceedings of the 1999 Particle Accelerator Conference. 1999: 636-640.
[4]	Teytelman D. iGp12-720F signal processor technical user manual[EB/OL]. https://www.dimtel.com/_media/support/manuals/manual12_720f_screen.pdf.
[5]	王娜, 许海生, 田赛克, 等. 高能同步辐射光源中的耦合阻抗及束流集体效应研究[J]. 原子能科学技术, 2019, 53(9):1601-1606. (Wang Na, Xu Haisheng, Tian Saike, et al. Study of beam coupling impedance and beam collective effect in high energy photon source[J]. Atomic Energy Science and Technology, 2019, 53(9): 1601-1606 doi: 10.7538/yzk.2019.youxian.0170
[6]	周泽然. 合肥光源数字横向逐束团反馈系统[D]. 合肥: 中国科学技术大学, 2009: 10-20. Zhou Zeran. HLS digital transverse bunch by bunch feedback system[D]. Hefei: University of Science and Technology of China, 2009: 10-20).
[7]	韩利峰. 横向反馈数字处理系统研究[D]. 上海: 中国科学院上海应用物理研究所, 2009: 20-27. Han Lifeng. Study of the digital transverse feedback system[D]. Shanghai: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2009: 20-27
[8]	Yang Yong, Leng Yongbin, Yan Yingbing, et al. Injection performance evaluation for SSRF storage ring[J]. Chinese Physics C, 2015, 39: 097003. doi: 10.1088/1674-1137/39/9/097003
[9]	Peake D J, Rassool R P. Growth/damp measurements and bunch-by-bunch diagnostics on the Australian synchrotron storage ring[C]//Proceedings of PAC09. 2009: 4105-4107.
[10]	张宁, 赖龙伟, 段立武, 等. 逐束团位置对束流横向反馈的影响分析[J]. 核技术, 2017, 40(12):1-5. (Zhang Ning, Lai Longwei, Duan Liwu, et al. Analysis of transverse feedback effect on beam using bunch-by-bunch position data[J]. Nuclear Techniques, 2017, 40(12): 1-5
[11]	Teytelman D, Akre R, Fox J D, et al. Measurements of transverse coupled-bunch instabilities in PEP-II[C]//Proceedings of the 9th European Particle Accelerator Conference. 2004: 2834-2836.