多功能扫描质子核探针信号探测和数据获取系统  

Multifunction signal detection and data acquisition system for SINAP's scanning proton microprobe

作　　者：包良满[1] 雷前涛[1] 刘江峰[2] 李晓林[1] 李燕[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]信阳师范学院物理电子工程学院,河南信阳464000

出　　处：《强激光与粒子束》2015年第11期191-196,共6页High Power Laser and Particle Beams

基　　金：中国科学院科研装备研制项目(YZ200937);上海市科研计划项目(14ZR1448300)

摘　　要：为了在一次扫描质子核探针实验中能获取多种物理信息,研制了多功能信号探测与数据获取系统。系统由组合探测器、多站多参量数据采集与束流扫描、样品台控制与显微观测三个子系统组成。组合探测器包括了Si(Li)X射线探测器,高纯Geγ射线探测器,以及Au(Si)面垒带电粒子探测器,可完成多种物理参数的同时获取。系统的核心数据采集与束流扫描系统基于NI公司的PXI-7852R数据采集卡和LabVIEW软件平台,具备了多个物理信号采集、多能谱显示以及束流扫描和二维成像等功能。六轴高精度真空样品台由计算机控制,可实现显微图像对样品的定位及对扫描区域的可视化选择。初步实验验证了该系统的可靠性与稳定性。For acquiring multiple physical parameters in one experiment on the SINAP scanning proton microprobe（SPM）,the new multifunction signal detection and data acquisition system was developed.The system consists of multiple detectors,multi-stations and multi-parameters data acquisition and beam scanning system,manipulator control and microscope system.Multiple detectors include two Si（Li）detectors for X-rays,a HPGe detector for gamma-rays,and Au（Si）surface barrier detectors for charged particles.The core data acquisition system,named 4LB-Ⅰis based on National Instruments PXI-7852 Rcard and Labview FPGA module.It performs the functions of multi-channel data acquisition,display,beam scanning and two-dimensional images,which can obtain multiple physical parameters simultaneously in one measurement.Six axis vacuum manipulator is computer-controlled for sample positioning and video sample imaging.The initial experiment results show that the system is a powerful tool with good stability and reliability.

关 键 词：扫描质子核探针 信号探测 数据获取 

分 类 号：TL822.6[核科学技术—核技术及应用]