高性能金刚石辐射探测器的研制与测试  

Development and testing of a high performance diamond radiation detector

作　　者：刘群 姜兴东 李海霞[2] 王秀华[2] 李荣华[2] 陈翠红[2] LIU Qun;JIANG Xing-dong;LI Hai-xia;WANG Xiu-hua;LI Rong-hua;CHEN Cui-hong(Key Laboratory of Special Functional Materials and Structural Design with the Ministry of Education,School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]兰州大学物理科学与技术学院,特殊功能材料与结构设计教育部重点实验室,兰州730000 [2]中国科学院近代物理研究所,兰州730000

出　　处：《兰州大学学报（自然科学版）》2023年第5期689-693,710,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：特殊功能材料与结构设计教育部重点实验室开放基金项目(LZUJBKY-2021-KB06);国家自然科学基金青年基金项目(12005267)。

摘　　要：设计了长×宽×高为4.5 mm×4.5 mm×500μm的金刚石辐射探测器.通过在金刚石/Al面形成肖特基势垒优化探测器性能,对其电特性(暗电流、电荷收集率)和探测特性(能量分辨率)进行测试.结果表明,电荷收集率最优为96.9%;暗电流随外加偏压的增加而增加,在偏压100 V以内小于0.1 nA;能量分辨率在偏压为380 V时最优,为2.82%.金刚石/Al面形成的肖特基势垒不仅降低了暗电流,还使辐射探测器的能量分辨率有很大改善.A diamond radiation detector with a length×width×height of 4.5 mm×4.5 mm×500μm was designed,whose performance was optimized by forming Schottky on the diamond/Al surface,and its electrical characteristics(dark current,charge collection rate)and detection characteristics(energy resolution)were tested.The results showed that the best charge collection rate was 96.9%.The dark current increased with the increase of the external bias,and was less than 0.1 nA within 100 V.The energy resolution was the best when the bias voltage was 380 V,reaching 2.82%.It could be seen that the Schottky formed by the diamond/Al plane not only reduced the dark current,but also greatly improved the energy resolution of the diamond radiation detector.

关 键 词：金刚石辐射探测器 电特性 探测特性 

分 类 号：O571.1[理学—粒子物理与原子核物理]