The GEM-based neutron detector has flourished in the past decade. However almost all the GEM-based neutron detectors work in the flow-gas mode, and the long-term performances of the detectors may be unstable due to the dynamic changes of atmospheric pressure and ambient temperature. In this paper, a sealed ceramic GEM-based neutron detector was developed at China Spallation Neutron Source (CSNS) and its sensitive area was 100 mm * 100 mm. The characterizations of the detector were presented and discussed, which included the plateau curve, the neutron beam profile, the neutron wavelength spectrum, the spatial resolution (FWHM: 2.77 mm), the two-dimensional (2D) imaging ability, the neutron detection efficiency and the counting rate instability (Relative Standard Deviation (RSD): 0.7%). The results show that the detector has good performances in sealed mode, and it can be used for the measurement of the direct neutron beam at CSNS.
@article{arxiv.2009.08649,
title = {A sealed ceramic GEM-based neutron detector},
author = {Jianjin Zhou and Jianrong Zhou and Xiaojuan Zhou and Lin Zhu and Yangdong Wei and Hong Xu and Huiyin Wu and Kang Wei and Jianqing Yang and Guian Yang and Yuguang Xie and Yi Zhang and Xiaohu Wang and Baowei Ding and Bitao Hu and Zhijia Sun and Yuanbo Chen},
journal= {arXiv preprint arXiv:2009.08649},
year = {2021}
}