发散磁场中螺旋波等离子体双电层加速机理研究

项目名称： 发散磁场中螺旋波等离子体双电层加速机理研究

项目编号： No.11305265

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 王墨戈

作者单位： 中国人民解放军国防科学技术大学

项目金额： 28万元

中文摘要： 螺旋波等离子体在发散磁场中运动形成的无电流双电层可实现等离子体超音速加速，以此为加速原理的螺旋波双电层推力器具有结构紧凑、能量耦合效率高以及工作寿命长的特点，是一种很有潜力的新型空间电推力器，但目前对其等离子体加速的认识尚不全面。本项目拟通过理论和实验研究发散磁场中无电流双电层的形成及加速机制，采用二维流体/PIC混合模拟方法，结合激光诱导荧光动态诊断技术，着重解决低气压、非均匀等离子体放电状态及其在双电层作用下加速膨胀过程模拟问题，探索气体工质流率、磁场强度和构型、射频功率等因素与双电层加速性能之间的内在关联规律，为螺旋波双电层推力器的设计与优化提供理论方法。

中文关键词： 螺旋波双电层推力器；加速机制；激光诱导荧光；；

英文摘要： The formation and presentation of Current Free Double Layer (CFDL) can accelerate plasma to supersonic speed along a diverging magnetic filed in helicon plasma. Based on this acceleration mechanisms, helicon double layer thruster presents an alternative for future deep-space missions. It is a promising thruster for its figure of merits of compact configuration, high energy coupling efficiency and unrestricted lifetime. However, it is not comprehensive for the acceleration mechanisms. This project mainly focuses on the CFDL acceleration mechanisms and formation in a diverging magnetic field configuration through theoretical and experimental methods, and gives an emphasis on the low pressure, non-uniform plasma discharge status, as well as the acceleration and expansion process simulation under the influence of CFDL, by means of two dimensional Fluid/PIC mixture computation method and laser induced fluorescence(LIF) dynamic diagnosis technology. Effective acceleration mechanism and performance models of the helicon CFDL will be developed, which will be capable of predicting the relationships among those factors, such as the propulsive efficiency influenced by the propellant mass flow rate , magnetic configuration and intensity, radio-frequency power. The expected achievement of this project will be helpful to pro

英文关键词： Helicon Wave Double Layer Thruster；Acceleration Mechanism；Laser Induced Fluorescence；；