| 高探测效率低噪声的大面阵热中子敏感微通道板 | |
| 潘京生 ; 孙建宁 ; 韩晓明 ; 张蓉 ; 孙赛林 ; 杨祎罡 ; 田阳 ; 金戈 ; 张正君 ; 邵爱飞 ; 苏德坦 ; PAN Jing-sheng ; SUN Jian-ning ; HAN Xiao-ming ; ZHANG Rong ; SUN Sai-ling ; YANG Yi-gang ; TIAN Yang ; JIN Ge ; ZHANG Zheng-jun ; SHAO Ai-fei ; SU De-tan | |
| 2016-03-30 ; 2016-03-30 | |
| 关键词 | 中子照相 MCP事件计数探测器 大面阵中子敏感MCP 探测效率 暗计数率 quantum anomalous Hall effect quantum Hall effect topological insulator magnetic doping TL81 |
| 其他题名 | High Dectection Efficiency Low Noise Large Format Neutron Sensitive Microchannel Plate |
| 中文摘要 | 在微通道板玻璃中掺中子灵敏核素,并去除玻璃中的天然放射性同位素成份,可以实现微通道板对热中子的敏感,使探测器具有极低的背景事件率.在微通道板玻璃中掺加3mol%的Gd2O3,同时去除玻璃中的K2O和/或Rb2O,制作成50 mm直径、0.6 mm厚度、10μm孔径的微通道板,实现了对25.3meV热中子33%的探测效率,同时探测器的暗计数率低至0.11events cm-2·s-1.通过计算和分析热中子在微通道板基体中的俘获概率和155,157 Gd(n,γ)156,158 Gd反应所能引发的有效信号,说明了通过微通道板的结构优化,掺3mol%Gd2O3的微通道板可以实现最大50%的热中子探测效率.在此基础上,进一步完成了106mm直径10μm孔径的掺3mol%Gd2O3的优化结构大面阵低噪声中子敏感微通道板的制作.; Both direct addition of neutron-absorbing atoms into Microchannel Plate(MCP)glass and elimination of content contained natural radioactive isotope can make MCP sensitive to neutrons without changing the remainder of the fabrication process,while such a neutron-sensitive detector has very low background rate.The 50 mm format and 10μm pore size MCP which fabricated by a MCP glass doped with 3mol% Gd2O3 and eliminate K2 O and Rb2 O contnent demonstrated its capability to image thermal neutrons with 33% detection efficiency and low dark count rate of 0.11 events cm-2·s-1.Through calculation and analysis of the capture probability of neutron within a MCP matrix and the effective signal which arised from 155,157 Gd(n,γ)156,158 Gd reaction production,our study indicated that the maximum detection efficiency of 50% can be achieved for this MCP doped with 3 mol% Gd2O3 and optimized geometry.In addition,a 106mm-diameter and 10μm pore size neutron sensitive MCP doped with 3mol%Gd2O3and optimized geometry were fabricated based on above-mentioned method. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/143269]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 潘京生,孙建宁,韩晓明,等. 高探测效率低噪声的大面阵热中子敏感微通道板[J],2016, 2016. |
| APA | 潘京生.,孙建宁.,韩晓明.,张蓉.,孙赛林.,...&SU De-tan.(2016).高探测效率低噪声的大面阵热中子敏感微通道板.. |
| MLA | 潘京生,et al."高探测效率低噪声的大面阵热中子敏感微通道板".(2016). |
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