Abstract

The China spallation neutron source (CSNS) was built and started running since 2018. It produces neutrons by impinging 1.6 GeV protons onto a tungsten target with 25 Hz repetition frequency. A beam line exploiting the back-streaming neutrons (Back-n) was built mainly for nuclear data measurement and started commissioning simultaneously with CSNS in 2018. There are two experimental endstations along the Back-n beam line: endstation 1 (#ES1) with a neutron flight path of about 55 m and endstation 2 (#ES2) with about 76 m. The neutron energy spectra of both #ES1 and #ES2 were measured since it is important for feasibility study and analysis. In this paper, the measurement of the neutron energy spectrum of Back-n #ES1 is reported. It is measured by a multi-layer fission chamber using the 235U samples as the neutron converters. The neutron energy spectrum from 0.1 eV to 30 MeV is obtained. The integral neutron flux (from 0.1 eV to 30 MeV) normalized to the proton beam power of 100 kW is 1.55×107 neutrons/cm2/s.

Details

Title
Measurement of the neutron energy spectrum of Back-n #ES1 at CSNS
Author
Chen, Yonghao; Luan, Guangyuan; Bao, Jie; Hantao Jing; An, Qi; Bai, Huaiyong; Cao, Ping; Chen, Qiping; Cheng, Pinjing; Cui, Zengqi; Fan, Ruirui; Feng, Changqing; Gu, Minhao; Guo, Fengqin; Han, Changcai; Han, Zijie; He, Guozhu; He, Yongcheng; He, Yuefeng; Huang, Hanxiong; Huang, Weiling; Huang, Xiru; Ji, Xiaolu; Ji, Xuyang; Jiang, Haoyu; Jiang, Wei; Kang, Ling; Kang, Mingtao; Li, Bo; Li, Lun; Li, Qiang; Li, Xiao; Yang(a) Li; Yang(b) Li; Liu, Rong; Liu, Shubin; Liu, Xingyan; Ma, Yinglin; Ning, Changjun; Qi, Binbin; Ren, Jie; Ruan, Xichao; Song, Zhaohui; Sun, Hong; Sun, Xiaoyang; Sun, Zhijia; Tan, Zhixin; Tang, Hongqing; Tang, Jingyu; Wang, Pengcheng; Wang, Qi; Wang, Taofeng; Wang, Yanfeng; Wang, Zhaohui; Wang, Zheng; Wen, Jie; Wen, Zhongwei; Wu, Qingbiao; Wu, Xiaoguang; Wu, Xuan; Xie, Likun; Yang, Yiwei; Han, Yi; Li, Yu; Yu, Tao; Yu, Yongji; Zhang, Guohui; Zhang, Jing; Zhang, Linhao; Zhang, Liying; Zhang, Qingming; Zhang, Qiwei; Zhang, Xianpeng; Zhang, Yuliang; Zhang, Zhiyong; Zhao, Yingtan; Zhou, Liang; Zhou, Zuying; Zhu, Danyang; Zhu, Kejun; Zhu, Peng
Section
Experimental Facilities, Equipment, Techniques and Methods
Publication year
2020
Publication date
2020
Publisher
EDP Sciences
ISSN
21016275
e-ISSN
2100014X
Source type
Conference Paper
Language of publication
English
DOI
https://doi.org/10.1051/epjconf/202023917018
ProQuest document ID
2488161668
Copyright
© 2020. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and conditions, you may use this content in accordance with the terms of the License.