Study and implementation of automatic gain calibration method for 4-channel digital beam position monitor

Gao Guodong; Cao Jianshe; Liu Zhi; Du Yaoyao; Ye Qiang; Ma Huizhou; Sui Yanfeng; Yue Junhui; He Jun; Xu Taoguang; Yang Jing; Zhang Xing’er; Tang Xuhui; Wei Shujun

doi:10.11884/HPLPB202133.210202

Volume 33 Issue 9

Sep. 2021

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Article Navigation > High Power Laser and Particle Beams > 2021 > 33(9): 094006

Wang Qiangqiang, Deng Keli, Deng Caibo, et al. Three-dimensional numeric simulation of multiplication process of secondary electrons in microchannel plate[J]. High Power Laser and Particle Beams, 2015, 27: 124005. doi: 10.11884/HPLPB201527.124005

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Gao Guodong, Cao Jianshe, Liu Zhi, et al. Study and implementation of automatic gain calibration method for 4-channel digital beam position monitor[J]. High Power Laser and Particle Beams, 2021, 33: 094006. doi: 10.11884/HPLPB202133.210202

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Study and implementation of automatic gain calibration method for 4-channel digital beam position monitor

doi: 10.11884/HPLPB202133.210202

Gao Guodong^{1, 2
,},
Cao Jianshe^{1, 2
,
,},
Liu Zhi¹,
Du Yaoyao¹,
Ye Qiang¹,
Ma Huizhou¹,
Sui Yanfeng^{1, 2},
Yue Junhui¹,
He Jun¹,
Xu Taoguang¹,
Yang Jing^{1, 2},
Zhang Xing’er^{1, 2},
Tang Xuhui^{1, 2},
Wei Shujun^{1, 2}

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2021-05-26
Rev Recd Date: 2021-07-21

Available Online: 2021-08-12

Publish Date: 2021-09-15

Abstract

Abstract

The accuracy of beam position measurement is affected by the gain inconsistency of the four channels of the digital BPM. Based on the existing hardware and the requirement of beam position monitor (BPM) measurement accuracy, a design for automatic calibration of digital BPM sample data gain is implemented by Verilog language in the self-made electronics. Firstly, the system design of automatic gain calibration module is introduced. Secondly, the realization method of the module is described in detail, and the ADC data automatic gain calibration test platform is designed and built to verify the function of the automatic gain calibration module. Finally, the application of this design in BPM channel calibration is introduced. Test results show that this method achieves 4-channel gain consistency and makes the data amplitude after ADC sampling equal. This method effectively solves the measurement bias caused by channel gain inconsistency and the difficulty of ADC data amplitude calibration in engineering application. It will play an important role in the automatic channel calibration of BPM system.
- digital beam position monitor,
- ADC sampling,
- FPGA,
- automatic gain calibration

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References(9)

References

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