HT-7装置回旋质谱探测器边界离子诊断  

Application of omegatron detector in the HT-7 tokamak edge ion diagnosis

作　　者：高伟[1] 凌必利[1] 万宝年[1] 

机构地区：[1]中科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》2005年第4期283-289,共7页Nuclear Fusion and Plasma Physics

摘　　要：介绍了回旋质谱探测器的原理和设计及其在HT-7装置欧姆放电下对边缘等离子体中离子的诊断实验。探测器安装在限制器附近,通过一小孔引进等离子体;设置的前置偏压使电子和离子分离,并使离子减速;进入腔体内部的离子在射频电场和平行磁场的作用下发生回旋共振;通过考察收集的离子电流信号中的共振峰可得到离子的荷质比、回旋频率等参数。实验中观察到荷质比为1、0.5、0.3333、0.1819的离子共振峰。The configuration of the omegatron detector developed for the HT-7 tokamak is described. The detector has been employed under the condition of ohmic discharges. The detector was located near the limiter and the plasma was introduced into it through a pinhole. The hissing voltages were used to separate the ions and electrons. After being decelerated, the ions enter the cavity and resonate with the superimposing effect of RF electronic field and magnetic field. Resonant ion current signals have been collected successfully. Analyzing the resonant peak is an effective method to acquire the charge-mass ratio and cyclotron frequency of the ions. The resonant peaks of the ions at the cberge-maas ratio 1,0. 5,0.3333 and 0. 1819 were observed in the experiment.

关 键 词：回旋质谱仪 回旋共振 离子电流 共振峰 

分 类 号：TL657[核科学技术—核技术及应用]