Compact broadband high-resolution Compton spectroscopy for laser-driven high-flux gamma rays

Zhang Zhen-Chi; Yang Tao; Hu Guang-Yue; Li Meng-Ting; Luo Wen; An Ning; Zheng Jian

doi:10.1063/5.0026005

Volume 6 Issue 1

Jan. 2021

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Zhang Zhen-Chi, Yang Tao, Hu Guang-Yue, Li Meng-Ting, Luo Wen, An Ning, Zheng Jian. Compact broadband high-resolution Compton spectroscopy for laser-driven high-flux gamma rays[J]. Matter and Radiation at Extremes, 2021, 6(1): 014401. doi: 10.1063/5.0026005

Citation:

Zhang Zhen-Chi, Yang Tao, Hu Guang-Yue, Li Meng-Ting, Luo Wen, An Ning, Zheng Jian. Compact broadband high-resolution Compton spectroscopy for laser-driven high-flux gamma rays[J]. Matter and Radiation at Extremes, 2021, 6(1): 014401. doi: 10.1063/5.0026005

Citation:

Zhang Zhen-Chi, Yang Tao, Hu Guang-Yue, Li Meng-Ting, Luo Wen, An Ning, Zheng Jian. Compact broadband high-resolution Compton spectroscopy for laser-driven high-flux gamma rays[J]. Matter and Radiation at Extremes, 2021, 6(1): 014401. doi: 10.1063/5.0026005

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Compact broadband high-resolution Compton spectroscopy for laser-driven high-flux gamma rays

doi: 10.1063/5.0026005

Zhang Zhen-Chi^1
,,
Yang Tao^1
,,
Hu Guang-Yue^{1, 2
,
,
,},
Li Meng-Ting^1
,,
Luo Wen^3
,,
An Ning^{4, 5},
Zheng Jian^{1, 6
,}

1.
CAS Key Laboratory of Geospace Environment and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
2.
CAS Center for Excellence in Ultra-Intense Laser Science (CEULS), Shanghai 200031, China
3.
School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
4.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
5.
Anhui Specreation Instrument Technology Co., Ltd., Hefei, Anhui 230088, China
6.
Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China

More Information

Corresponding author: a)Author to whom correspondence should be addressed: gyhu@ustc.edu.cn
Received Date: 2020-08-22
Accepted Date: 2020-11-05

Available Online: 2021-01-01

Publish Date: 2021-01-15

Abstract

Abstract

A compact broadband Compton spectrometer with high spectral resolution has been designed to detect spectra of laser-driven high-flux gamma rays. The primary detection range of the gamma-ray spectrum is 0.5 MeV–13 MeV, although a secondary harder gamma-ray region of 13 MeV–30 MeV can also be covered. The Compton-scattered electrons are spectrally resolved using a curved surface detector and a nonuniform magnetic field produced by a pair of step-like magnets. This design allows a compact structure, a wider bandwidth, especially in the lower-energy region of 0.5 MeV–2 MeV, and optimum spectral resolution. The spectral resolution is 5%–10% in the range 4 MeV–13 MeV and better than 25% in the range 0.5 MeV–4 MeV (with an Al converter of 0.25 mm thickness and a collimator of 1 cm inner diameter). Low-Z plastic materials are used on the inner surface of the spectrometer to suppress noise due to secondary X-ray fluorescence. The spectrometer can be adjusted flexibly via a specially designed mechanical component. An algorithm based on a regularization method has also been developed to reconstruct the gamma-ray spectrum from the scattered electrons.

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References(25)

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