强激光与粒子束2012，Vol.24Issue(4)：963-967,5.DOI:10.3788/HP1PB20122404.0963
强流电子束二极管等离子体光学诊断
Optical diagnosis system for intense electron beam diode plasma
摘要
Abstract
A nanosecond time-resolved imaging platform for diode plasmas diagnostics has been constructed based on the pulsed electron beam accelerator and high speed framing camera(HSFC). The accelerator can provide an electrical pulse with voltages of 200-500 kV, rise-time (from 10% to 90% amplitude) of 25 ns and duration of 110 ns. The diode currents up to kA level can be extracted. The trigger signal for camera was picked up by a water-resistor voltage divider after the main switch of the accelerator, which could avoid the disadvantageous influence of the time jitter caused by the breakdown of the gas gaps. Then the sampled negative electrical pulse was converted into a transistor-transistor logic(TTL) signal (5 V) with rise time of about 1. 5 ns and time jitter less than 1 ns via a processor. And this signal was taken as the synchronization time base. According to the working characteristics of the camera, the synchronization scheme relying mainly on electrical pulse delay method supplemented by light signal delay method was determined to make sure that the camera can work synchronously with the light production and transportation from the diode plasmas within the time scale of nanosecond. Moreover, shielding and filtering methods were used to restrain the interference on the measurement system from the accelerator. Finally, time resolved 2-D framing images of the diode plasmas were acquired.关键词
强流电子束/时间分辨等离子体诊断/高速分幅相机/电磁兼容Key words
high-current electron beam/ time-resolved plasma diagnostics/ high speed framing cameras electromagnetic compatibility分类
能源科技引用本文复制引用
杨杰,舒挺,张军,樊玉伟,杨建华,刘列,殷毅,罗玲..强流电子束二极管等离子体光学诊断[J].强激光与粒子束,2012,24(4):963-967,5.基金项目
国家高技术发展计划项目 （）
国家自然科学基金项目(11075210) （11075210）
