Analysis of Effects of the Arc Voltage on Arc Discharges in a Cathode Ion Source of Neutral Beam Injector

A hot cathode bucket ion source is used for the EAST(experimental advanced superconducting tokamak)neutral beam injector.The thermal electrons emitted from the surface of the cathode are extracted and accelerated by the electric field formed by the arc voltage,which is applied between the arc chamber of the ion source and the cathode.This paper analyzes the effects of arc voltage on the arc discharge in a hot cathode high current ion source.     

NBI射频离子源探针信号采集系统

中性束注入加热(NBI)是托卡马克(EAST)实验装置中最重要的辅助加热手段之一,射频离子源是等离子体物理研究所NBI系统在研究的关键部件.为准确地诊断等离子体参数,本文以PXI为平台,设计了一套射频离子源探针信号采集系统.硬件部分针对等离子体产生过程中1MHz射频干扰问题,设计了一个4阶巴特沃斯低通滤波器.软件部分以Lab VIEW作为开发平台,对探针信号进行实时采集和处理.处理后的数据在GUI界面上显示,并存储在本地硬盘.该系统的实现可以有效解决射频离子源测试试验中的干扰问题,提高获取数据的准确度,为射频等离子体放电调试提供更为可靠的依据.