Operation stability improvement for synchrotron light sources by tune feedback system

Wu Xu; Tian Shunqiang; Zhang Qinglei; Zhang Wenzhi

doi:10.11884/HPLPB202032.190270

Volume 32 Issue 4

Mar. 2020

Turn off MathJax

Article Contents

Article Navigation > High Power Laser and Particle Beams > 2020 > 32(4): 045107

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

Citation:

PDF( 1018 KB)

Operation stability improvement for synchrotron light sources by tune feedback system

doi: 10.11884/HPLPB202032.190270

1.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Shanghai Advanced Research Institute, Chinese Academy of Sciences (Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory), Shanghai 201204, China

More Information

Author Bio:
Wu Xu (1988—), male, PhD student and engineer, engaged in accelerator physics; wuxu@zjlab.org.cn
Received Date: 2019-07-19
Rev Recd Date: 2019-12-07
Publish Date: 2020-03-06

Abstract

Abstract

Ten Insert Devices (IDs) had been installed in the Shanghai Synchrotron Radiation Facility (SSRF) storage ring. The ID gaps were repeatedly adjusted for the scientific experiments during the user time. The residual quadrupole errors beyond the ID feedforward disturbed the beam optics, including the betatron tune deviations that spoiled machine performance and brightness stability. A tune feedback system was developed and implemented in the SSRF storage ring to resolve the deterioration. The tune stability of ±0.001 in 2 weeks was reached. Another important function of this feedback system is finding out slow drift in the power supplies of dipole or quadrupole by observing the correction current changes in the feedback. To prove this feedback’s feasibility, we compared variations of the beam parameters, including the injection efficiency, the beam life-time, the horizontal beam size and the beta-beatings.
- tune feedback,
- stability,
- SSRF,
- beam optics,
- beta-beating

FullText(HTML)

References(21)

References

[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.