Simulation and performance study of ceramic THGEM

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 using 5.9 keV X-rays. The maximum gain of a single layer ceramic THGEM reaches 6×10⁴ and 1.5×10⁴ at Ne+CH₄=95:5 and Ar+i-C₄H₁₀=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 a ²³⁹Pu source, the alpha deposited energy spectrum and gain curve of the ceramic THGEM were measured.     

用于总β测量闪烁探测器输出脉冲甄别原理初探

介绍了一种新型总β测量闪烁探测器的原理与结构,对闪烁探测器输出回路脉冲计算公式及其极值进行了推导,利用MATLAB强大的数值计算功能讨论了闪烁探测器输出回路脉冲形状与回路RC时间常数的关系。并初步提出信号甄别的方法。     

用PB8.0开发的核辐射探测实验教学软件

本针对核辐射探测实验中所获取的实验数据量大、处理复杂的问题,提出了用实验教学软件通过计算机判断所获取的核辐射探测实验数据,为学生做实验时所获取的实验数据的正确与否做出直观、方便、快速的判断,从而提高实验教学质量。