Signal processing algorithm optimization of bunch-by-bunch phase measurement system for storage ring

Zhou Yimei; Leng Yongbin; Xu Xingyi; Gao Bo; Cao Shanshan

doi:10.11884/HPLPB202032.200033

Volume 32 Issue 7

Jun. 2020

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Article Navigation > High Power Laser and Particle Beams > 2020 > 32(7): 074002

Zhou Yimei, Leng Yongbin, Xu Xingyi, et al. Signal processing algorithm optimization of bunch-by-bunch phase measurement system for storage ring[J]. High Power Laser and Particle Beams, 2020, 32: 074002. doi: 10.11884/HPLPB202032.200033

Citation:

Zhou Yimei, Leng Yongbin, Xu Xingyi, et al. Signal processing algorithm optimization of bunch-by-bunch phase measurement system for storage ring[J]. High Power Laser and Particle Beams, 2020, 32: 074002. doi: 10.11884/HPLPB202032.200033

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Signal processing algorithm optimization of bunch-by-bunch phase measurement system for storage ring

doi: 10.11884/HPLPB202032.200033

Zhou Yimei^{1, 2
,},
Leng Yongbin^{1, 2, 3
,
,},
Xu Xingyi^{1, 2},
Gao Bo^{2, 3},
Cao Shanshan^{2, 3}

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 201204, China

Received Date: 2020-02-17
Rev Recd Date: 2020-04-15
Publish Date: 2020-06-24

Abstract

Abstract

To further improve the accuracy of phase measurement, the Shanghai Synchrotron Radiation Facility (SSRF) Beam Instrumentation (BI) Group proposed a new signal processing method, the correlation function method, based on the bunch-by-bunch phase measurement system. This method calculates the bunch-by-bunch phase by performing pattern matching directly on all sampling points of the oscilloscope in the time domain. The advantage is that the data processing is only limited by the oscilloscope bandwidth, and more BPM (Beam Position Monitor) harmonic signals can be retained. The results show that increasing the BPM signal processing bandwidth can effectively remove the crosstalk between bunches and reduce the system measurement error caused by signal reflection. The principal component analysis (PCA) method is used to evaluate the phase measurement resolution, the larger bunch charge, the better the resolution. The precise phase dependence between the bunches can also be used to analyze the beam wake field and impedance in the storage ring.
- Shanghai Synchrotron Radiation Facility,
- bunch-by-bunch phase measurement system,
- correlation function method,
- look-up table,
- crosstalk,
- reflection

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References(17)

References

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