Langmuir探针法结合发射光谱法诊断螺旋波低压氢等离子体

核聚变与等离子体物理 ›› 2011, Vol. 31 ›› Issue (4): 365-371.

Langmuir探针法结合发射光谱法诊断螺旋波低压氢等离子体

高映雪, 吴卫东, 戴阳, 姜帆

(1. 中国工程物理研究院激光聚变研究中心，绵阳 621900；2. 西南科技大学理学院，绵阳 621010； 3. 四川大学原子与分子物理研究所，成都 610065)

收稿日期:2011-01-01 修回日期:2011-05-09 出版日期:2011-12-15 发布日期:2011-12-09
作者简介:高映雪(1986-)，女，四川成都人，硕士研究生，主要从事低温等离子体诊断研究。
基金资助:
中国工程物理研究院重大基金项目(2005Z0805)

Langmuir probe and emission spectroscopy diagnosis of low pressure hydrogen plasma induced by helicon-wave

GAO Ying-xue1, 2, WU Wei-dong1, 2, DAI Yang1, 2, JIANG Fan1, 3

(1. Research Center of Laser Fusion, CAEP, Mianyang 621900; 2. College of Science, Southwest University of Science and Technology, Mianyang 621010; 3. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065)

Received:2011-01-01 Revised:2011-05-09 Online:2011-12-15 Published:2011-12-09

摘要/Abstract

摘要：

采用Langmuir探针法结合发射光谱法对螺旋波诱导的低压氢等离子体进行诊断，根据Druyvesteyn方法和日冕模型分析电子能量几率函数(EEPF)、有效电子温度(T_eff)、电子密度(n_e)及激发态氢原子密度(n_H^*)随实验参数的变化规律。结果表明：随射频功率(P_rf)、气压(p)和约束磁场(B)的增大，EEPF峰位由高能向低能移动，T_eff下降；当P_rf从25W增大至35W左右时，n_e发生跳跃增长，而n_H^*始终随P_rf增大线性增长; 随p增大，n_e 和n_H^*都呈现先增加后减小的变化规律; 随B增强，n_e线性增长，而n_H^*先增大后减小。

关键词: 螺旋波等离子体, Langmuir探针, 发射光谱, Druyvesteyn方法, 日冕模型

Abstract:

The characteristics of helicon-wave hydrogen low pressure plasma were investigated by Langmuir probe and emission spectroscopy. The variation law of electron energy probability function (EEPF), effective electron temperature (T_eff), electron density (n_e) and hydrogen atom excited state density (n_H^*) were analyzed in relation of different experimental parameters by Druyvesteyn method and corona model. The results demonstrate that the peaks of higher energy of EEPF curves move toward lower energy with the increase of RF power, pressure and controlled magnetic field, T_effdecreases. The n_e increases and jumps with the increase of RF power from 25W to 35W, and the n_H^* increases linearly with the rise of RF power; the n_e and n_H^* increases firstly and then decrease with the rise of pressure; with the rise of controlled magnetic field, the n_e increase linearly and the n_H^* increases firstly and then decreases.

Key words: Helicon-wave plasma, Langmuir probe, Emission spectroscopy, Druyvesteyn method, Corona

中图分类号:

高映雪1, 2, 吴卫东1, 2, 戴阳1, 2, 姜帆1, 3. Langmuir探针法结合发射光谱法诊断螺旋波低压氢等离子体[J]. 核聚变与等离子体物理, 2011, 31(4): 365-371.

GAO Ying-xue, WU Wei-dong, DAI Yang, JIANG Fan. Langmuir probe and emission spectroscopy diagnosis of low pressure hydrogen plasma induced by helicon-wave[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2011, 31(4): 365-371.

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