Back-n White Neutron Source at CSNS and its Applications

Back-streaming neutrons from the spallation target of the China Spallation Neutron Source (CSNS) that emit through the incoming proton channel were exploited to build a white neutron beam facility (the so-called Back-n white neutron source), which was completed in March 2018. The Back-n neutron beam...

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Published inarXiv.org
Main Authors The CSNS Back-n Collaboration, Jing-Yu, Tang, An, Qi, Jiang-Bo, Bai, Bao, Jie, Yu, Bao, Cao, Ping, Hao-Lei, Chen, Qi-Ping, Chen, Yong-Hao, Chen, Chen, Zhen, Zeng-Qi Cui, Rui-Rui Fan, Chang-Qing, Feng, Ke-Qing Gao, Xiao-Long, Gao, Min-Hao, Gu, Chang-Cai, Han, Zi-Jie Han, Guo-Zhu, He, Yong-Cheng, He, Yang, Hong, Yi-Wei, Hu, Han-Xiong, Huang, Xi-Ru Huang, Hao-Yu, Jiang, Jiang, Wei, Zhi-Jie Jiang, Han-Tao, Jing, Kang, Ling, Li, Bo, Li, Chao, Jia-Wen, Li, Li, Qiang, Li, Xiao, Yang, Li, Liu, Jie, Liu, Rong, Shu-Bin, Liu, Xing-Yan, Liu, Long, Ze, Guang-Yuan Luan, Chang-Jun, Ning, Meng-Chen, Niu, Bin-Bin, Qi, Ren, Jie, Zhi-Zhou, Ren, Xi-Chao Ruan, Zhao-Hui, Song, Sun, Kang, Zhi-Jia, Sun, Zhi-Xin Tan, Xin-Yi, Tang, Bin-Bin, Tian, Li-Jiao, Wang, Peng-Cheng, Wang, Zhao-Hui, Wang, Zhong-Wei, Wen, Xiao-Guang Wu, Wu, Xuan, Li-Kun, Xie, Xiao-Yun, Yang, Yi-Wei, Yang, Han, Yi, Li, Yu, Yu, Tao, Yong-Ji, Yu, Guo-Hui, Zhang, Lin-Hao, Zhang, Qi-Wei, Zhang, Xian-Peng, Zhang, Yu-Liang, Zhang, Zhang, Zhi-Yong, Lu-Ping, Zhou, Zhi-Hao Zhou, Ke-Jun, Zhu
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 17.01.2021
Subjects
Energy spectra
Kinetic energy
Neutron beams
Neutron sources
Neutrons
Proton beams
Spallation
Spectrometers
Time measurement
Tungsten
Utilities
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Summary:Back-streaming neutrons from the spallation target of the China Spallation Neutron Source (CSNS) that emit through the incoming proton channel were exploited to build a white neutron beam facility (the so-called Back-n white neutron source), which was completed in March 2018. The Back-n neutron beam is very intense, at approximately 2*10^7 n/cm^2/s at 55 m from the target, and has a nominal proton beam with a power of 100 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV and a thick tungsten target in multiple slices with modest moderation from the cooling water through the slices. In addition, the excellent energy spectrum spanning from 0.5 eV to 200 MeV, and a good time resolution related to the time-of-flight measurements make it a typical white neutron source for nuclear data measurements; its overall performance is among that of the best white neutron sources in the world. Equipped with advanced spectrometers, detectors, and application utilities, the Back-n facility can serve wide applications, with a focus on neutron-induced cross-section measurements. This article presents an overview of the neutron beam characteristics, the experimental setups, and the ongoing applications at Back-n.
ISSN:2331-8422