霍尔推力器等离子体束流电磁控制机理研究

项目名称： 霍尔推力器等离子体束流电磁控制机理研究

项目编号： No.11275034

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 段萍

作者单位： 大连海事大学

项目金额： 90万元

中文摘要： 霍尔推力器是广泛应用于航天器空间推进领域的电磁式等离子体加速装置，其放电通道内电磁场分布对等离子体束流的控制将直接影响推力器的性能。目前，深空探测等航天任务对霍尔等离子体束流的均匀、聚焦和稳定提出了更高需求，急需探明其控制机理。 本课题针对霍尔推力器通道内各功能区域电磁场与等离子体相互作用过程建立物理模型，拟采用PIC粒子模拟和实验方法研究推力器通道内不同特征区域等离子体束流在电磁场作用下的放电特性；研究电磁场位型对电子传导特性及离子加速稳定性的影响规律；研究各特征区域结构及磁场分布对抑制离子能量展宽和离子束流发散的物理机制。探索电磁场特性的优化方法，研发数值模拟程序，为实现霍尔推力器生成高速均匀、高电离率和高流量气体放电等离子体束流提供理论依据和技术支持。 本课题也期望所研究的思路和结果为等离子体源应用于其它研究领域提供借鉴与参考。

中文关键词： 霍尔推力器；粒子模拟；壁面分割；磁场强度；磁场位形

英文摘要： Hall thruster, as an electromagnetic plasma accelerator, has found its wide application in the field of space propulsion. The control of plasma beam by the distribution of the electromagnetic field in the discharge channel will impact the performance of the thruster directly. At present, the study of control mechanisms is in urgent need because deep space explorations have brought higher demands on the homogeneity,focussing and stability of the Hall plasma beam. By building physical models for each interaction process between electromagnetic field and plasma happening in different regions of Hall thruster channel and adopting the Particle in cell (PIC) simulation and experimental method, this project aims to delve into the discharge characteristics of plasma beam in each functional channel area in electromagnetic field,to study the effect of electromagnetic field pattern on electron transport properties and stability of ion acceleration and to understand the structure of each characteristics region as well as the physical influence mechanism of magnetic field distribution on the restraint of ion energy spread and ion beam divergence, exploring an optimization method of electromagnetic characteristics and developing simulation program to provide a theoretical basis and technical support for generating uniform, h

英文关键词： Hall thruster；Particle-in-cell；Wall segmenting；Magnetic field strength；Magnetic field configuration