| 微空心阴极放电时空特性 |
| |
| 引用本文： | 哈静,谷延霞,刘立芳.微空心阴极放电时空特性[J].强激光与粒子束,2014,26(5):054004-248. |
| |
| 作者姓名： | 哈静 谷延霞 刘立芳 |
| |
| 作者单位： | 1.河北农业大学 理学院, 河北 保定 071 001 |
| |
| 基金项目： | 国家自然科学基金项目(11205046); 河北省自然科学基金项目（A2012201037；A2013201266）;保定市科学技术研究与发展指导计划项目（13ZG032） |
| |
| 摘 要： | 为了揭示微空心阴极放电的放电机理,利用流体模型研究了矩形微空心阴极放电的时间和空间分布特性。在氩气环境下计算得到了压强为1.3×10~4Pa时电流、电势、电场、电子和离子密度等随时间的发展变化。结果表明,整个放电过程分为四个阶段,即预放电阶段、电场由轴向向径向转换阶段、电流缓慢增长向空心阴极效应过渡阶段和稳态放电阶段。稳态放电时出现明显的空心阴极效应,阴极位降区存在很高的径向电场和较高的电子平均能量,而负辉区径向电场很弱,电子平均能量较低,电子和离子密度峰值出现在负辉区,二者数值基本相等,而在阴极位降区离子密度远高于电子密度。
|
| 关 键 词： | 微空心阴极放电 流体模型 时空特性 电势 电子密度 离子密度 |
| 收稿时间： | 2013/6/25 |
Temporal and spatial characteristics of micro-hollow cathode discharge |
| |
| Affiliation: | 1.Institute of Science,Hebei Agriculture University,Baoding 071001,China |
| |
| Abstract: | In order to explore the mechanism of micro-hollow cathode discharge, the temporal and spatial characteristics of rectangular micro-hollow cathode discharge at 1.3 104 Pa are investigated using a two-dimensional fluid model. The current, electric potential, electric field, charged particle density and mean electron energy are calculated temporally. The results show that the whole discharge consists of four stages, the pre-discharge stage, the transition stage from axial electric field to radial electric field, the transition stage to the hollow cathode effect and the stable discharge stage. Hollow cathode effect exists at the stable stage. Strong electric field and high mean electron energy exist in the cathode fall while high density and quasi-neutral plasma in the negative glow. The peak value of electron density can achieve 1014 cm-3, and the electron temperature levels range from several eV to tens of eV. |
| |
| Keywords: | micro-hollow cathode discharge fluid model temporal and spatial characteristics electric potential electron density ion density |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《强激光与粒子束》浏览原始摘要信息 |
|
点击此处可从《强激光与粒子束》下载全文 |
|
