P型金属氧化物半导体(PMOS)剂量计探头的差分工作电路技术  

Differential working circuit of a positive channel metal oxide semiconductor(PMOS)dosimeter probe

作　　者：王思源 孙静[2] 陆妩[1,2] WANG Siyuan;SUN Jing;LU Wu(School of Physical Science and Technology,Xinjiang University,Urumqi 830002,China;Xinjiang Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Urumqi 830011,China)

机构地区：[1]新疆大学物理科学与技术学院,乌鲁木齐830002 [2]中国科学院新疆理化技术研究所,乌鲁木齐830011

出　　处：《辐射研究与辐射工艺学报》2021年第1期81-86,共6页Journal of Radiation Research and Radiation Processing

基　　金：中科院西部之光项目(2017-XBQNXZ-B-008);国家自然科学基金项目(11975305)资助。

摘　　要：针对目前国内使用的P型金属氧化物半导体(Positive channel metal oxide semiconductor,PMOS)剂量计存在的灵敏度较低的问题,在对PMOS剂量计探头工作电路原理进行深入研究的基础上,采用差分工作模式的探头电路对我国PMOS剂量计的工作电路进行改进,采用^60Coγ辐射源对国内常用探头进行辐照试验。结果表明:差分工作模式探头的辐照响应在线性度方面基本与国内目前常用的恒流注入工作模式探头保持一致,根据公式ΔVth=KD^n拟合后两种工作模式的n值均为0.7;而差分工作模式下探头的灵敏度得到了大幅度提高,恒流工作模式时探头灵敏度为0.0218 V/Gy(Si),差分工作模式时探头灵敏度为0.0972 V/Gy(Si),是恒流注入工作模式灵敏度的4倍有余。Currently, positive channel metal oxide semiconductor(PMOS) dosimeters used in China have low sensitivity;to solve this problem, this study aimed to improve the circuit of the PMOS dosimeter probe through detailed investigation of the circuit principles. A probe circuit was hence developed for the differential working mode, and a ^(60) Coγ radiation source was used to perform irradiation tests on commonly used probes in China. The results showed that the radiation response of the developed probe circuit in the differential working mode was linear and consistent with that of the constant current injection mode. Additionally, the sensitivity of the probe in the differential mode was four times that of the constant current injection mode, which was a considerable improvement.

关 键 词：金属氧化物半导体场效应晶体管(PMOSFET) 剂量计 差分电路 灵敏度 总剂量 

分 类 号：TN386.1[电子电信—物理电子学] TN709[电子电信—电路与系统]