高频振荡下缓慢前沿的电子束电流波形测量  

Measurement of slow-rising-edge electron-beam current under high frequency oscillation

作　　者：周军[1,2] 耿松[1] 刘万东[1] 李弘[1] 谢锦林[1] 兰涛[1] 刘阿娣 付宸硕 朱逸伦[1] 涂翠[1] 

机构地区：[1]中国科学技术大学近代物理系,中国科学院基础等离子体重点实验室,合肥230026 [2]西北核技术研究所,强脉冲辐射环境模拟与效应国家重点实验室,西安710024

出　　处：《强激光与粒子束》2013年第11期2877-2881,共5页High Power Laser and Particle Beams

基　　金：国际热核聚变实验堆(ITER)计划专项项目(2010GB107000);国家自然科学基金项目(11275200);反场箍缩磁约束聚变位形研究项目(2011GB106000)

摘　　要：推导了Rogowski线圈理论,给出了任意Rogowski线圈的表达式。通过使用高磁导率的磁芯材料,增加线圈匝数,设计出了能有效测量前沿变化0.1s、强度mA量级的电子束电流的Rogowski线圈,并测得了电子束等离子体装置中的电子束电流信号。利用推导的任意Rogowski线圈表达式,成功获得低频与高频共存的电流波形。测量结果表明,该电子束等离子体系统中存在束流振荡,振荡幅度达12%。An arbitrary Rogowski coil expression was deduced.Through using high permeability magnetic core and adding turns of the coil,the Rogowski coil was designed,which could measure the low current with slow-rising edge.And the electronbeam signal was obtained by the Rogowski coil.Using the deduced expression of arbitrary Rogowski coil,the current waveforms with low frequency and high frequency were gained.The results show that beam oscillation exists in this electron-beam plasma system,and the oscillation amplitude reaches 12 %.

关 键 词：电子束等离子体 电子束电流 高频振荡 ROGOWSKI线圈 

分 类 号：O531[理学—等离子体物理]