摘要
THGEMs based on a ceramic substrate have been successfully developed for neutron and single photon detection. The influences on thermal neutron scattering and internal radioactivity of both ceramic and FR-4 substrates were studied and compared. The ceramic THGEMs are homemade, of 200 μm hole diameter, 600 μm pitch,200 μm thickness, 80 μm rim, and 50 mm×50 mm sensitive area. FR-4 THGEMs with the same geometry were used as a reference. The gas gain, energy resolution and gain stability were measured in different gas mixtures using5.9 ke V X-rays. The maximum gain of a single layer ceramic THGEM reaches 6×104and 1.5×104at Ne＋CH4=95：5and Ar ＋ i-C4 H10 = 97：3, respectively. The energy resolution is better than 24%. Good gain stability was obtained during a more than 100 hour continuous test in Ar＋CO2=80：20. By using a239 Pu source, the alpha deposited energy spectrum and gain curve of the ceramic THGEM were measured.
THGEMs based on a ceramic substrate have been successfully developed for neutron and single photon detection. The influences on thermal neutron scattering and internal radioactivity of both ceramic and FR-4 substrates were studied and compared. The ceramic THGEMs are homemade, of 200 μm hole diameter, 600 μm pitch,200 μm thickness, 80 μm rim, and 50 mm×50 mm sensitive area. FR-4 THGEMs with the same geometry were used as a reference. The gas gain, energy resolution and gain stability were measured in different gas mixtures using5.9 ke V X-rays. The maximum gain of a single layer ceramic THGEM reaches 6×104and 1.5×104at Ne＋CH4=95：5and Ar ＋ i-C4 H10 = 97：3, respectively. The energy resolution is better than 24%. Good gain stability was obtained during a more than 100 hour continuous test in Ar＋CO2=80：20. By using a239 Pu source, the alpha deposited energy spectrum and gain curve of the ceramic THGEM were measured.
基金
Supported by National Natural Science Foundation of China(11205173)
State Key Laboratory of Particle Detection and Electronics(H9294206TD)
