IBIC2021 - List of Authors (Zhou, Y.M.)

Paper	Title	Page
WEPP32	Tests of Digital BPM Signal Processors for SHINE	443
	X. Yang, J. Wan SINAP, Shanghai, People’s Republic of China L.W. Lai, Y.M. Zhou SARI-CAS, Pudong, Shanghai, People’s Republic of China Y.B. Leng, W.M. Zhou, Y.M. Zhou SSRF, Shanghai, People’s Republic of China
	Digital signal processors that can handle 1 MHz bunch rate BPM signal processing is under development for SHINE. At the same time, two general purpose processor prototypes for all BPM signal sampling and processing have been developed. One uses 14bits ADC, the other uses 16bits ADC. Both processors have been completed. This paper will introduce the tests of the processors and the related performance evaluations.
	Poster WEPP32 [0.977 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP32
About •	paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 22 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPP09	Research on the Optimal Amplitude Extraction Algorithm for Cavity BPM	48
	J. Chen, Y.B. Leng, T. Wu, Y.M. Zhou SSRF, Shanghai, People’s Republic of China S.S. Cao, B. Gao SARI-CAS, Pudong, Shanghai, People’s Republic of China
	The wake field of different modes of cavity BPM carries different bunch information, the amplitude and phase of the signals of different modes can be extracted through the signal processing method to obtain the characteristic parameters of the source bunch. In the application of bunch charge and position measurement, the accurate amplitude extraction method for cavity BPM signal is the primary issue to be considered when designing the data acquisition and processing system. In this paper, through theoretical analysis and numerical simulation, it is proved that the optimal algorithm of amplitude extraction for CBPM exists, and the dependence between the data processing window size and the decay time of the cavity BPM under the optimal design is given. In addition, the relationship between the optimized amplitude extraction uncertainty and the noise-to-signal ratio, sampling rate of data acquisition and processing system, and the decay time of the cavity BPM is also proposed, which can also provide clear guidance for the design and optimization of the CBPM system.
	Poster MOPP09 [0.538 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP09
About •	paper received ※ 08 September 2021 paper accepted ※ 17 September 2021 issue date ※ 04 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP13	Bunch Arrival Time Measurement System Test for SHINE	396
	Y.M. Zhou, J. Chen, Y.B. Leng SSRF, Shanghai, People’s Republic of China S.S. Cao SARI-CAS, Pudong, Shanghai, People’s Republic of China
	To achieve high-precision synchronization between electron bunches and seeded lasers, a femto-second resolution bunch arrival time measurement system (BAM) is required at SHINE (Shanghai High repetition rate XFEL aNd Extreme light facility). The bunch signal from a GHz-bandwidth cavity monitor is mixed with a reference signal from the device synchronization clock in the RF front-end. Then, the generated IF signal is collected by the digital acquisition system. In the pre-research stage, four sets of cavity monitors with different frequencies and load quality factors and three sets of analog front-ends with different schemes were performed, but now only one monitor with the attenuation time constant of 200 ns was installed for beam experiment testing. The system can measure the bunch charge, bunch arrival time, and bunch flight time. The first results will be presented in this paper.
	Poster WEPP13 [1.776 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP13
About •	paper received ※ 08 September 2021 paper accepted ※ 01 October 2021 issue date ※ 13 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Tests of Digital BPM Signal Processors for SHINE

443

X. Yang, J. Wan
SINAP, Shanghai, People’s Republic of China
L.W. Lai, Y.M. Zhou
SARI-CAS, Pudong, Shanghai, People’s Republic of China
Y.B. Leng, W.M. Zhou, Y.M. Zhou
SSRF, Shanghai, People’s Republic of China

Digital signal processors that can handle 1 MHz bunch rate BPM signal processing is under development for SHINE. At the same time, two general purpose processor prototypes for all BPM signal sampling and processing have been developed. One uses 14bits ADC, the other uses 16bits ADC. Both processors have been completed. This paper will introduce the tests of the processors and the related performance evaluations.

Poster WEPP32 [0.977 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP32

About •

paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 22 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPP09

Research on the Optimal Amplitude Extraction Algorithm for Cavity BPM

48

J. Chen, Y.B. Leng, T. Wu, Y.M. Zhou
SSRF, Shanghai, People’s Republic of China
S.S. Cao, B. Gao
SARI-CAS, Pudong, Shanghai, People’s Republic of China

The wake field of different modes of cavity BPM carries different bunch information, the amplitude and phase of the signals of different modes can be extracted through the signal processing method to obtain the characteristic parameters of the source bunch. In the application of bunch charge and position measurement, the accurate amplitude extraction method for cavity BPM signal is the primary issue to be considered when designing the data acquisition and processing system. In this paper, through theoretical analysis and numerical simulation, it is proved that the optimal algorithm of amplitude extraction for CBPM exists, and the dependence between the data processing window size and the decay time of the cavity BPM under the optimal design is given. In addition, the relationship between the optimized amplitude extraction uncertainty and the noise-to-signal ratio, sampling rate of data acquisition and processing system, and the decay time of the cavity BPM is also proposed, which can also provide clear guidance for the design and optimization of the CBPM system.

Poster MOPP09 [0.538 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP09

About •

paper received ※ 08 September 2021 paper accepted ※ 17 September 2021 issue date ※ 04 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP13

Bunch Arrival Time Measurement System Test for SHINE

396

Y.M. Zhou, J. Chen, Y.B. Leng
SSRF, Shanghai, People’s Republic of China
S.S. Cao
SARI-CAS, Pudong, Shanghai, People’s Republic of China

To achieve high-precision synchronization between electron bunches and seeded lasers, a femto-second resolution bunch arrival time measurement system (BAM) is required at SHINE (Shanghai High repetition rate XFEL aNd Extreme light facility). The bunch signal from a GHz-bandwidth cavity monitor is mixed with a reference signal from the device synchronization clock in the RF front-end. Then, the generated IF signal is collected by the digital acquisition system. In the pre-research stage, four sets of cavity monitors with different frequencies and load quality factors and three sets of analog front-ends with different schemes were performed, but now only one monitor with the attenuation time constant of 200 ns was installed for beam experiment testing. The system can measure the bunch charge, bunch arrival time, and bunch flight time. The first results will be presented in this paper.

Poster WEPP13 [1.776 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP13

About •

paper received ※ 08 September 2021 paper accepted ※ 01 October 2021 issue date ※ 13 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)