Correlation Method of Average Plasma Velocity Measurement in Hall-Effect Thrusters  

作　　者：宁中喜 李鸿 于达仁 

机构地区：[1]HIT Plasma Propulsion Laboratory(HPPL),Harbin Institute of Technology

出　　处：《Plasma Science and Technology》2009年第6期709-713,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.50676026)

摘　　要：A new method to measure the average plasma velocity in a Hall-effect thruster is presented. The method is brought forward in virtue of the characteristics of low frequency oscillation induced by the propellant ionization in the channel and the oriented movement feature of the plasma density out of the channel. The method, equivalent to the correlation method generally used in the signal processing field, provides a solution to the problem of specific impulse measurement on a timescale of hundreds of microseconds and makes the time evolution of average plasma velocity clear. The comparison between the measured value and the calibrated value shows that the relative error is about 3%.A new method to measure the average plasma velocity in a Hall-effect thruster is presented. The method is brought forward in virtue of the characteristics of low frequency oscillation induced by the propellant ionization in the channel and the oriented movement feature of the plasma density out of the channel. The method, equivalent to the correlation method generally used in the signal processing field, provides a solution to the problem of specific impulse measurement on a timescale of hundreds of microseconds and makes the time evolution of average plasma velocity clear. The comparison between the measured value and the calibrated value shows that the relative error is about 3%.

关 键 词：Hall-effect thruster average plasma velocity correlation method 

分 类 号：O53[理学—等离子体物理]