基于LabVIEW的高能质子束流密度分布测试系统

A Measurement System of the High Energy Proton Beam Current Density Based on LabVIEW

摘要:

主要介绍一套基于LabVIEW平台设计的高能质子束流密度分布测试系统,服务于电子器件抗辐射加固试验,用于加速器的辐射剂量测量。它由法拉第杯探测器,移动平台控制系统和基于LabVIEW的控制与数据获取软件三部分组成,具有对法拉第杯位置控制、静电计读写、智能化测量、数据实时处理等功能。性能测试显示该质子束流测量系统能实现亚pA级电流的测量,20pA量程时的测量精度为5%,解决了弱流质子束的测量问题。该系统具有可靠性高、可扩充性好、抗干扰能力强的特点,同时实验结果表明测得的质子束流密度分布,能准确评估电子器件辐射环境与剂量,为半导体器件抗辐射加固设计提供支撑。

Abstract:

A LabVIEW based measurement system of the high energy proton beam current density has been developed for radiation hardening experiments of electronic devices. It mainly consists of a faraday cup, a motor controller and a LabVIEW based DAQ software. And it performs the functions of position control of faraday cup, read-write operation of electrometer, intellectualized measurement, real time data processing and so on．Performance tests demonstrate that current sensitivity of the system can reach sub-pA with an acquisition accuracy of 5% at the measurement range of 20 pA. This system has properties of high reliability, expansibility and interference immunity, and can meet the demands of weak proton beam measurement to provide necessary data for radiation-hardened electronic devices design.