中国空间科学技术2016，Vol.36Issue(1)：94-102,9.DOI:10.3780/j.issn.1000-758X.2016.0016
μ-PPT等离子体电子密度氢光谱诊断技术
A diagnostic scheme for electron density in μ-PPT plasma using H Stark broadening
摘要
Abstract
A method of electron density measurement inside discharge channel of pulsed-plasma thruster (PPT)with higher accuracy was proposed,based on Stark broadening spectrum analysis.By measuring the line profile and the full-width at half-maximum (FWHM)of C atom spectrum emitted by PPT plasma,the electron density can be calculated.But this requi res adequate high electron density.If the electron density is lower than 1016 cm-3,the accuracy of diagnosis is dramatically decreased. Therefore,a tiny H tracer based on H atom spectrum of the line profile and the full-width at half-maximum was proposed to measure the electron density.Comparing with the conventional method,it can improve remarkably the accuracy of electron density measurement.关键词
电子密度/Stark展宽/H原子谱线分析/等离子体电推力器/高精度测量Key words
electron density/Stark broadening/analysis of H atom spectrum/pulsed-plasma-thruster/high-precision measurement分类
航空航天引用本文复制引用
王尚民,张家良,张天平,冯杰,郑茂繁,黄永杰..μ-PPT等离子体电子密度氢光谱诊断技术[J].中国空间科学技术,2016,36(1):94-102,9.基金项目
兰州空间技术物理研究所自主研发项目 (YSC0714) （YSC0714）
