基于PIPS探测器的便携式α谱仪研制  

Development of the Portable Alpha -ray Spectrometer Based on the PIPS Detector

作　　者：成毅[1] 庹先国[1,2] 周传文[1] 王洪辉[2] 穆克亮[2] 

机构地区：[1]地学核技术四川省重点实验室,成都理工大学610059 [2]地球探测与信息技术教育部重点实验室,成都理工大学610059

出　　处：《核电子学与探测技术》2011年第4期444-446,450,共4页Nuclear Electronics & Detection Technology

基　　金：国家创新方法工作专项(2008IM040500) ;国家自然科学基金(40974065);四川省科技基础平台项目和四川省科技支撑计划(2008GZ0040,2008GZ0197)

摘　　要：针对现场快速测量放射性污染的需要,设计开发了一种基于离子注入硅半导体探测器(PIPS)的便携式α谱仪。将PIPS探测器捕获的α射线通过电荷灵敏前置放大器、信号获取模块实现谱数据获取和处理,以C8051F120单片机为主控平台进行谱线分析,以矩阵键盘、LCD组建人机接口,采用锂离子电池及电源模块供电;设计了真空测量腔以得到能量分辨率更高、更干净的谱线。性能测试表明,仪器整机功耗为105 mA、在空气环境下能量分辨率为8.1%、在真空环境下能量分辨率为6.7%。该仪器具有精度高、稳定性好、低功耗、适于现场测量等特点。In order to maintain the needs of determining radiation contamination in - situ rapidly, we established a kind of portable alpha - ray spectrometer based on the PIPS detector. The instrument employs PIPS detector to capture ct -ray, signals are collected and disposed by preamplifier circuit and the signal acquisition module, then spectra analysis is achieved by C8051F120 MCU control platform. Man- machine interface was organized by matrix keyboard and LCD display. Both lithium - ion batteries and power processing module were used to supply the system power. We designed a vacuum measurement chamber in order to obtain higher energy resolution and cleaner spectra. By performance testing we get that the whole power consumption of this instrument is 105mA, energy resolution is 8.1% in normal air environment and 6.7% in vacuum. The instrument has high -precision, good stability, low power consumption, and is very suitable for in- situ measuring.

关 键 词：离子注入硅探测器(PIPS) 便携式 Α谱仪 C8051F 

分 类 号：TL817.2[核科学技术—核技术及应用]