基于激光二极管的软X射线相机信号的自检设计  

Research on soft X-ray camera signal self-test using laser diode

作　　者：周润晖 曹宏睿 赵金龙 刘士兴[1] 张伟 李强[1] 陈开云 俞红 胡立群 ZHOU Run-hui;CAO Hong-rui;ZHAO Jing-long;LIU Shi-xing;ZHANG Wei;LI Qiang;CHEN Kai-yun;YU Hong;HU Li-qun(Hefei University of Technology,School of Electronic Science&Applied Physics,Hefei 230009;Hefei Institute of Physics Science,Chinese Academy of Science,Institute of Plasma Physics,Hefei 230031)

机构地区：[1]合肥工业大学电子科学与应用物理学院,合肥230009 [2]中国科学院合肥物质科学研究院,等离子体物理研究所,合肥230031

出　　处：《核聚变与等离子体物理》2022年第2期229-235,共7页Nuclear Fusion and Plasma Physics

基　　金：ITER项目中方诊断采购包(Y25QT16563);国家磁约束核聚变能发展研究专项(2013GB107001);国家国际科技合作专项(2015DFA61760)。

摘　　要：介绍了在ITER装置中使用激光二极管实现软X射线相机自检的设计。利用漫反射板进行光路设计,基于FPGA完成驱动模块设计和基于LABVIEW软件完成上位机设计。实现了激光二极管的远程实时开关和激光功率的调控,控制精度达到10;量级。在FPGA代码中预留了发出窄脉冲电流信号的功能,最窄脉冲达到100ns以内,能用于探测系统响应速率的测量,并对探测系统的本底噪声和基线偏移进行测量。Remote signal self-test function of radial X-ray camera in ITER is realized using laser diode. The optical path between detector and laser diode is designed with diffuse plane, the driving circuit module with real-time response function is designed based on the field programmable gate array(FPGA), the design of remote switching, controlling output luminous intensity and current-limiting protection is achieved with LABVIEW software, and the control accuracy reaches one thousandth levels. The function of sending a narrow pulse current signal is reserved in the FPGA code, and the narrowest pulse reaches within 100ns, which can be used to measure the response rate of detection system, and measure the background noise and baseline offset.

关 键 词：ITER 软X射线相机 激光二极管 漫反射板 远程控制 

分 类 号：TL653[核科学技术—核技术及应用]