Measurement of neutron beam spot distribution using a Micromegas detector for the Back-n white neutron facility at China Spallation Neutron Source

Qi Binbin,Li Yang,Zhu Danyang,Zhang Zhiyong,Fan Ruirui,Pan Jiang,Feng Jianxin,Liu Chengming,Feng Changqing,Liu Jianbei,Shao Ming,Zhou Yi,Wang Yanfeng,Yi Han,An Qi,Bai Huaiyong,Bao Jie,Cao Ping,Chen Qiping,Chen Yonghao,Cheng Pinjing,Cui Zengqi,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,Jing Hantao,Kang Ling,Kang Mingtao,Li Bo,Li Lun,Li Qiang,Li Xiao,Li Y.,Liu Rong,Liu Shubin,Liu Xingyan,Luan Guangyuan,Ma Yinglin,Ning Changjun,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 Zhaohui,Wang Zheng,Wen Jie,Wen Zhongwei,Wu Qingbiao,Wu Xiaoguang,Wu Xuan,Xie Likun,Yang Yiwei,Yu Li,Yu Tao,Yu Yongji,Zhang Guohui,Zhang Jing,Zhang Linhao,Zhang Liying,Zhang Qingming,Zhang Qiwei,Zhang Xianpeng,Zhang Yuliang,Zhao Yingtan,Zhou Liang,Zhou Zuying,Zhu Kejun,Zhu Peng

arxiv（2019）

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摘要

The Back-n white neutron beam line, which uses back-streaming white neutrons from the spallation target of China Spallation Neutron Source, is extremely useful for nuclear data measurements. A Micromegas-based neutron detector with two variations is developed to measure the beam spot distribution for this beam line. In this article, the design, fabrication, and characterization of the detector are described. The results of the detector performance tests are presented, which include the relative electron transparency, the gain and the gain uniformity, and the neutron detection capability. The first online test of the detector with the Back-n neutron beam is also presented.

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