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Operation stability improvement for synchrotron light sources by tune feedback system

Wu Xu Tian Shunqiang Zhang Qinglei Zhang Wenzhi

吴旭, 田顺强, 张庆磊, 等. 工作点反馈系统对同步辐射光源运行稳定性的提升[J]. 强激光与粒子束, 2020, 32: 045107. doi: 10.11884/HPLPB202032.190270
引用本文: 吴旭, 田顺强, 张庆磊, 等. 工作点反馈系统对同步辐射光源运行稳定性的提升[J]. 强激光与粒子束, 2020, 32: 045107. doi: 10.11884/HPLPB202032.190270
Wu Xu, Tian Shunqiang, Zhang Qinglei, et al. Operation stability improvement for synchrotron light sources by tune feedback system[J]. High Power Laser and Particle Beams, 2020, 32: 045107. doi: 10.11884/HPLPB202032.190270
Citation: Wu Xu, Tian Shunqiang, Zhang Qinglei, et al. Operation stability improvement for synchrotron light sources by tune feedback system[J]. High Power Laser and Particle Beams, 2020, 32: 045107. doi: 10.11884/HPLPB202032.190270

工作点反馈系统对同步辐射光源运行稳定性的提升

doi: 10.11884/HPLPB202032.190270
详细信息
  • 中图分类号: TL501; TL507

Operation stability improvement for synchrotron light sources by tune feedback system

More Information
    Author Bio:

    Wu Xu (1988—), male, PhD student and engineer, engaged in accelerator physics; wuxu@zjlab.org.cn

  • 摘要:

    上海同步辐射装置(SSRF)储存环上目前已经安装了十台插入元件(IDs)。在用户时间,插入元件的间隙被反复地调整以进行科学实验。虽然使用了插入件前馈系统,但依然存在扰动束流光学的残余四极场,它会导致束流横向振荡工作点的变化,进而影响机器的性能和同步辐射光亮度的稳定。为此,我们研发了一个工作点反馈系统来解决这个问题,并且已经在上海光源储存环上投入了运行,在两周左右的运行周期内,工作点的稳定度达到了±0.001。这个反馈系统还有另一个重要功能,即可以根据监控反馈系统校正电流的变化趋势来判断二极磁铁电源和四极磁铁电源是否存在慢漂问题。为了验证这个工作点反馈的可行性,我们对使用反馈前后几周的束流参数进行了比较,包括储存环注入效率、束流寿命、水平方向束斑尺寸以及β函数的变化情况(beta-beatings)。

  • Figure  1.  Tune feedforward effects

    Figure  2.  Beam optics and lattice for a cell

    Figure  3.  Correction currents and magnets drift

    Figure  4.  Stable operation of tune feedback

    Figure  5.  Beta-beatings

    Figure  6.  Main beam parameter variations

    Table  1.   Beam parameters of the SSRF storage ring

    parameterdesign valuemeasured value
    beam energy / GeV3.503.50
    circumference / m432---------
    number of cells 20 ---------
    construction DBA ---------
    numbers of QF/QD in one cell 4/6 ---------
    beam current / mA200−300240
    tune (H, V)22.22, 11.2922.220, 11.290 (±0.01)
    natural emittance / nm·rad3.893.9
    coupling1%0.3%
    natural chromaticity (H, V)−55.7, −17.9--------
    corrected chromaticity (H, V)---------1.5, 2.5
    RMS energy spread9.845×10−40.001
    energy loss per turn / MeV1.435~1.45
    momentum compaction factor4.27×10−44.2 ×10−4
    RF voltage / MV4.04~4.8
    RF frequency / MHz499.654499.68
    synchrotron frequency0.007 20.007 5
    下载: 导出CSV
  • [1] Heron M T, Abbott M G, Furseman M, et al. Feed-forward and feedback schemes applied to the diamond light source storage ring[C]// Proceedings of IPAC2014, 2014: 1757-1759.
    [2] Martin I P S, Fielder R, Furseman M, et al. Active optics stabilisation measures at the diamond storage ring[C]//Proceedings of IPAC2014, 2014: 1760-1762.
    [3] Chao A W, Mess K H, Tigner M, et al. Handbook of accelerator physics and engineering[M]. 2nd ed. World Scientific, 2013.
    [4] Hou Jie, Tian Shunqiang, Zhang Manzhou, et al. Studies of closed orbit correction and slow orbit feedback for the SSRF storage ring[J]. Chinese Physics C, 2009, 33(2): 145-150.
    [5] Zhang Manzhou, Wang kun, Zhang Qinglei, et al. Compensations of double elliptical polarization undulator effects on the SSRF storage ring[J]. High Power Laser and Particle Beams, 2017, 29: 075103.
    [6] Tian Shunqiang, Zhang Manzhou, Zhang Qinglei, et al. Lattice design of the SSRF-U storage ring[C]// Proceedings of IPAC2015, 2015: 304-306.
    [7] Dai Zhimin, Liu Guimin, Huang Nan. Design of the SSRF storage ring magnet lattice[J]. Nuclear Science and Techniques, 2003, 14(2): 89-92.
    [8] Zhang Wenzhi, Tian Shunqiang, Zhang Manzhou, et al. Design and first commissioning of a new mode with lower emittance in the SSRF storage ring[J]. Chinese Physics C, 2009, 33(5): 397-400. doi: 10.1088/1674-1137/33/5/016
    [9] Tomás R, Aiba M, Franchi A, et al. Review of linear optics measurement and correction for charged particle accelerators[J]. Physical Review Accelerators and Beams, 2017, 20(5): 054801. doi: 10.1103/PhysRevAccelBeams.20.054801
    [10] Tian Shunqiang, Zhang Wenzhi, Li Haohu, et al. Linear optics calibration and nonlinear optimization during the commissioning of the SSRF storage ring[J]. Chinese Physics C, 2009, 33(s2): 83-85.
    [11] Tian Shunqiang, Hou Jie, Chen Guangling, et al. Analysis of sextupole effects on β function beating in the SSRF storage ring[J]. Chinese Physics C, 2008, 32(7): 576-579. doi: 10.1088/1674-1137/32/7/013
    [12] Terebilo A. Accelerator modeling with MATLAB[C]// Proceedings of the 2001 Particle Accelerator Conference, 2001: 3203-3205.
    [13] Chen, Jianhui, Zhang Manzhou, Zhao Zhentang. Orbit response matrix analysis and lattice periodicity restoration of the SSRF storage ring[J]. Chinese Physics C, 2009, 33(9): 785-788. doi: 10.1088/1674-1137/33/9/015
    [14] Safranek J. Experimental determination of storage ring optics using orbit response measurements[J]. Nuclear Instruments and Methods in Physics Research A, 1997, 388(1/2): 27-36. doi: 10.1016/S0168-9002(97)00309-4
    [15] Liu C, Hulsart R, Michnoff R, et al. Weighted SVD algorithm for closed-orbit correction and 10Hz feedback in RHIC[C]//Proceedings of IPAC2012, 2012: 2906-2908.
    [16] Leng Yongbin, Yan Yingbing, Yuan Renxian, et al. Betatron tune measurement system for Shanghai Synchrotron Radiation Facility storage ring[J]. High Power Laser and Particle Beams, 2010, 22(10): 2412-2416. doi: 10.3788/HPLPB20102210.2412
    [17] Zhao Zhentang, Yin Lixin, Zhang Wenzhi, et al. Progress towards top-up operation at SSRF [C]// Proceedings of IPAC2011, Spain, 2011: 3008-3010.
    [18] Jena S, Yadav S, Agrawal R K, et al. Stabilization of betatron tune in Indus-2 storage[J]. Chinese Physics C, 2014, 38(6): 067002. doi: 10.1088/1674-1137/38/6/067002
    [19] Tian Shunqiang, Hou Jie, Chen Guangling, et al. New chromaticity compensation approach and dynamic aperture increase in the SSRF storage ring[J]. Chinese Physics C, 2008, 32(8): 661-664.
    [20] Safranek J, Portmann G, Terebilo A. MATLAB-based LOCO[C]// The 8th European Particle Accelerator Conference, 2002.
    [21] Zhou Xuemei. Measurement of optics for the SSRF storage ring in commissioning[J]. Chinese Physics C, 2009, 33(s2): 78-82.
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出版历程
  • 收稿日期:  2019-07-19
  • 修回日期:  2019-12-07
  • 刊出日期:  2020-03-06

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