空气脉冲电离室传感器的设计  

Design of sensor of air pulse ionization chamber

作　　者：张国华[1] 方方[2] 耿波[3] 

机构地区：[1]山东省海洋环境监测技术重点实验室山东省科学院海洋仪器仪表研究所,山东青岛266001 [2]成都理工大学核技术与自动化工程学院,四川成都610059 [3]核动力运行研究所,湖北武汉430074

出　　处：《传感器与微系统》2011年第11期86-88,共3页Transducer and Microsystem Technologies

摘　　要：基于氡及其子体衰变放出的α射线能使空气分子电离的现象,设计新型空气脉冲电离室传感器,主要由电离室、中心电极和保护环组成。采用前置放大器和RC-CR带通滤波器把来自电离室的微弱信号进行放大,再经过脉冲甄别器与给定的阈值电压比较,最终转换成数字量信号。现场应用结果表明:该传感器具有广泛的应用价值。A new type of sensor of air pulse ionization chamber is designed, based on the phenomenon that α-rays decayed by radon and its progeny can ionize the air molecules ,consists of ionization chamber ,central electrode and guard ring. Using the preamplifier and RC-CR bandpass filter, the weak signals from ionization chamber are amplified, and compared with the threshold voltage. These signals have been processed into digital signals. Practical applications show that the sensor has wide.application.

关 键 词：电离室 中心电极 保护环 3DJ7F 

分 类 号：TL811.1[核科学技术—核技术及应用]