典型文献
Characteristics of plasma in a novel laser-assisted pulsed plasma thruster
文献摘要：
A novel laser-assisted pulsed plasma thruster(LA-PPT)is proposed as an electric propulsion thruster,which separates laser ablation and electromagnetic acceleration.It aims for a higher specific impulse than that achieved with conventional LA-PPTs.Owing to the short-time discharge and the novel configuration,the physical mechanism of the discharge is unclear.Time and spatial-resolved optical emission spectroscopy was applied to investigate the variation in the plasma properties in the thruster discharge channel.The plasma species,electron temperature,and electron density were obtained and discussed.Our investigation revealed that there were Hα,Hβ,Hγ,Hε atoms,C Ⅰ,C Ⅱ,CⅢ,C Ⅳ,Cl Ⅰ,Cl Ⅱ particles,and a small amount of CH,C3,C2,H2 neutral molecular groups in the plasma.The electron temperature of the discharge channel of the thruster was within 0.6-4.9 eV,and the electron density was within(1.1-3.0)×1018 cm-3,which shows that the optical emission spectroscopy method is to measure the electron excitation temperature and electron density in heavy particles.But the Langmuir probe method is to measure the temperature and density of free electrons.The use of laser instead of spark plug as the ignition mode significantly changed the plasma distribution in the discharge channel.Unlike the conventional PPT,which has high electron density near the thruster surface,LA-PPT showed relatively large electron density at the thruster outlet,which increased the thruster specific impulse.In addition,the change in the ignition mode enabled the electron density in the LA-PPT discharge channel to be higher than that in the conventional PPT.This proves that the ignition mode with laser replacing the spark plug effectively optimised the PPT performance.
文献关键词：
中图分类号：
作者姓名：
Yuanzheng ZHAO;Yu ZHANG;Jianjun WU;Yang OU;Peng ZHENG
作者机构：
College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,People's Republic of China
文献出处：
引用格式：
[1]Yuanzheng ZHAO;Yu ZHANG;Jianjun WU;Yang OU;Peng ZHENG-.Characteristics of plasma in a novel laser-assisted pulsed plasma thruster)[J].等离子体科学和技术（英文版）,2022(07):3-14
A类：
thruster
B类：
Characteristics,plasma,novel,laser,assisted,pulsed,LA,proposed,electric,propulsion,which,separates,ablation,electromagnetic,acceleration,It,aims,higher,specific,impulse,than,that,achieved,conventional,PPTs,Owing,short,discharge,configuration,physical,mechanism,unclear,Time,spatial,resolved,optical,emission,spectroscopy,was,applied,investigate,variation,properties,channel,species,temperature,density,were,obtained,discussed,Our,investigation,revealed,there,atoms,Cl,particles,small,amount,CH,C3,C2,H2,neutral,molecular,groups,within,eV,shows,method,measure,excitation,heavy,But,Langmuir,probe,free,electrons,use,instead,spark,plug,ignition,mode,significantly,changed,distribution,Unlike,has,near,surface,showed,relatively,large,outlet,increased,In,addition,enabled,This,proves,replacing,effectively,optimised,performance
AB值：
0.440472
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
