EAST中快离子D_α诊断光电检测系统的设计  

Design of a new photoelectric detection system for fast-ion D_a diagnostic on EAST

作　　者：刘冬梅[1] 骆凡 常加峰 黄娟 熊魁 周峰 岳长喜 李智成 LIU Dong-mei;LUO Fan;CHANG Jia-feng;HUANG Juan;XIONG Kui;ZHOU Feng;YUE Chang-xi;LI Zhi-cheng(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031;Wuhan Branch,China Electric Power Research Institute,Wuhan 430071)

机构地区：[1]合肥工业大学电气工程与自动化学院,合肥230009 [2]中国科学院等离子体物理研究所,合肥230031 [3]中国电力科学研究院武汉分院,武汉430071

出　　处：《核聚变与等离子体物理》2019年第3期215-220,共6页Nuclear Fusion and Plasma Physics

基　　金：国家磁约束核聚变能发展研究专项(2014GB109004,2015GB102000,2015GB110005);中国电力科学研究院创新基金(JL83-17-002)

摘　　要：设计了具有高时间和空间分辨率EAST快离子Dα的光电检测系统,它由16路光电倍增管(PMT)和电流放大器(采用蓝宝石材料代替传统印刷板电路)构成。为了使快离子Dα(FIDA)信号在中性束注入时能从其他光源的在同一光谱范围内的谱线中检测出来,系统参数设计为整体光子-电压增益5.0×10^9、电流放大器增益106V/A、-3dB带宽500kHz。实验结果表明,该光电检测系统可以很好的检测到快离子Dα(FIDA)信号,并有助于从Dα光的多普勒偏移光谱推断快离子特性。The Dα signal photoelectric detection system with high temporal and spatial resolution consists of 16 channels, each channel consists of a photomultiplier tube (PMT) and a current amplifier based on a sapphire material instead of a conventional printed circuit board. In order to enable the detection of the fast-ion Dα(FIDA) signal from other light sources of the same spectral range when a neutral beam is injected, the system parameters were designed with a total photon-to-voltage gain of 5.0×10^9 , the current amplifier with a current-to-voltage gain of 106 V/A and a -3dB bandwidth at 500kHz. The EAST discharge experiment showed that the FIDA signal was well detected by this photoelectric detection system and the fast-ion properties were deduced from the Doppler shift spectrum of the Dα light.

关 键 词：EAST 光电检测系统 快离子Dα信号 电流放大器 

分 类 号：TL99[核科学技术—核技术及应用]