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用横向反馈系统对上海光源多束团不稳定性的诊断

张宁 赖龙伟 袁任贤 俞路阳

张宁, 赖龙伟, 袁任贤, 等. 用横向反馈系统对上海光源多束团不稳定性的诊断[J]. 强激光与粒子束. doi: 10.11884/HPLPB202133.200212
引用本文: 张宁, 赖龙伟, 袁任贤, 等. 用横向反馈系统对上海光源多束团不稳定性的诊断[J]. 强激光与粒子束. doi: 10.11884/HPLPB202133.200212
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. doi: 10.11884/HPLPB202133.200212
Citation: 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. doi: 10.11884/HPLPB202133.200212

用横向反馈系统对上海光源多束团不稳定性的诊断

doi: 10.11884/HPLPB202133.200212
基金项目: 中国科学院青年创新促进会项目(2019290)
详细信息
    作者简介:

    张宁:张 宁(1980—),男,博士,从事加速器束流诊断研究;zhangning@zjlab.org.cn

    通讯作者:

    赖龙伟1985—),男,副研究员,从事加速器束测电子学研究:lailongwei@zjlab.org.cn

  • 中图分类号: TL506

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

  • 摘要: 在上海光源二期升级改造过程中,为了解和追踪由阻抗引起的多束团不稳定性变化以及升级后的横向反馈系统对这种不稳定性的抑制效果,在机器研究中利用新反馈处理器的诊断工具对束流不同状态下的横向运动过程进行了记录,分析得到了最主要的横向多束团不稳定模式在束流稳态、注入瞬态以及增长-衰减过程中的变化情况,评估了横向反馈的作用效果,计算出该模式增长率/阻尼率以及增长率与束流的依赖关系。
  • 图  1  上海光源储存环运行状态填充模式

    Figure  1.  Storage ring operational filling pattern in SSRF

    图  2  主要束流横向振荡模式在归一化束流频谱中的分布

    Figure  2.  Dominated beam transverse oscillation mode in normalized beam spectrum

    图  3  用Hilbert变换得到的束流横向振荡包络。

    Figure  3.  Envelope of beam transverse oscillation obtained by Hilbert transform

    图  4  横向反馈ON/OFF下束流稳态逐束团与逐模式横向振荡分布

    Figure  4.  Steady-state transverse oscillation amplitude distribution in bunch-by-bunch and mode-by-mode with feedback ON/OFF

    图  5  反馈系统ON/OFF状态下逐束团横向振幅RMS对比

    Figure  5.  Comparison of bunch-by-bunch transverse amplitude RMS with feedback system ON/OFF

    图  6  反馈系统ON/OFF下模式平均振幅分布

    Figure  6.  Averaged mode amplitude distribution with feedback system ON/OFF

    图  7  反馈系统ON/OFF下束流注入瞬态横向振幅包络变化

    Figure  7.  Beam transverse oscillation amplitude evolution during injection transient with feedback system ON/OFF

    图  8  束流注入瞬态#719模式在反馈系统ON/OFF下振幅变化对比

    Figure  8.  Comparison of Mode #719 amplitude variation during injection transient with feedback system ON/OFF

    图  9  增长-阻尼过程测量时序图

    Figure  9.  The timing graph for the growth- damp measurements

    图  10  束流不稳定性增长-阻尼过程沿束团和模式分布

    Figure  10.  Beam instability grow-damp transient distribution during bunches and modes

    图  11  束流注入瞬态横向耦合不稳定模式振幅变化

    Figure  11.  Transverse coupled instability mode amplitude variation during injection transient

    图  12  具有明显增长-阻尼过程模式的增长率/阻尼率分布

    Figure  12.  Growth/Damping rate distribution for modes which showed obvious grow-damping sequence

    图  13  #719模式横向增长率线性拟合vs流强

    Figure  13.  Transverse growth rate linear fitting vs current for mode #719

  • Jaeschke E J, Khan S, Schneider J R, et al. Synchrotron Light Sources and free-electron lasers[M]. Switzerland: Springer Reference, 2016: 606-615.
    Teytelman D. Architectures and algorithms for control and diagnostics of coupled-bunch instabilities in circular accelerators[D]. Stanford: Stanford University, 2003: 1-17.
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    Teytelman D. iGp12-720F signal processor technical user manual[EB/OL]. https://www.dimtel.com/_media/support/manuals/manual12_720f_screen.pdf.
    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
    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).
    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).
    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
    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.
    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
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出版历程
  • 收稿日期:  2020-07-22
  • 修回日期:  2020-12-08
  • 网络出版日期:  2021-02-28

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