摘要
微波电子回旋共振(Electron Cyclotron Resonance,ECR)阴极是一种等离子体阴极,通过电子回旋共振加热能提高等离子体密度,可引出几毫安到超过1 A的电子电流,具有结构简单、易操作、工质适应性强、工作温度低(常温)等优势,适用于百瓦级及以下小功率电推进系统,在微小卫星、深空探测及超低轨吸气式推进任务中展现出显著应用潜力。本文从ECR阴极的工作原理及主要过程出发,系统综述了微波ECR阴极的核心研究进展:阐明其工作原理(ECR加热-磁镜约束-电离碰撞-电子引出的多物理场耦合过程)与特性(高电流密度、宽工质兼容性);从样机研制(日本μ1/μ10型、国内改进型)、仿真研究(PIC/MCC模型揭示等离子体产生与电子引出机制)、寿命可靠性(溅射污染、航天器表面条件影响)及变工质可行性(氙/氩/氪/氮/水等工质性能差异)四方面总结国内外关键技术突破,展望了仍需解决的问题与挑战。研究表明,微波ECR阴极已逐步从实验室验证走向工程应用,未来需进一步深化多物理场耦合机制、材料抗侵蚀设计及多工质适配技术,以支撑其在更复杂空间任务中的推广。
The microwave-driven electron cyclotron resonance(ECR)cathode is a type of plasma cathode that generates high-density plasma through ECR heating,capable of extracting electron currents ranging from several milliamperes to over 1 ampere.It features a simple structure,easy operation,and stable performance,with advantages such as strong propellant adaptability and low operating temperature(room temperature).This cathode is well-suited for low-power electric propulsion systems of up to 100 W,demonstrating significant application potential in microsatellites,deep space exploration,and very-low Earth orbit(VLEO)air-breathing propulsion missions.Starting from the operating principle and primary processes of ECR cathodes,this paper systematically reviews the core research advances of microwave ECR cathodes:First,it clarifies the operating principle(multi-physical field coupling process involving ECR resonant heating,magnetic mirror confinement,ionization collision,and electron extraction)and characteristics(high current density and broad propellant compatibility).Second,it summarizes key technological breakthroughs at home and abroad from four aspects:prototype development(Japaneseμ1/μ10 models,improved models in China),simulation studies(PIC/MCC models revealing plasma generation and electron extraction mechanisms),lifetime reliability(effects of sputtering contamination and spacecraft surface conditions),and multi-propellant feasibility(performance differences among propellants such as xenon,argon,krypton,nitrogen,and water).Finally,it discusses remaining issues and challenges for microwave cathodes.Research indicates that microwave ECR cathodes have gradually transitioned from laboratory validation to engineering applications.Future efforts should further deepen multi-physical field coupling mechanisms,material anti-erosion design,and multi-propellant adaptation technologies to support their deployment in more complex space missions.
作者
曾明
靳旭红
刘辉
任昱康
孙兆伟
于达仁
ZENG Ming;JIN Xuhong;LIU Hui;REN Yukang;SUN Zhaowei;YU Daren(Lab of Plasma Propulsion,Harbin Institute of Technology,Harbin 150006,China;Research Center of Satellite Technology,Harbin Institute of Technology,Harbin 150006,China;China Academy of Aerospace Aerodynamics,Beijing 100074,China)
出处
《推进技术》
北大核心
2025年第12期79-97,共19页
Journal of Propulsion Technology
基金
国家自然科学基金(NFSC20240268)
黑龙江省博士后基金(LBH-Z24129)
中国航天科技横向项目(JH20240673)。
关键词
电子回旋共振阴极
电推进
中和器
微波等离子体
综述
Electron cyclotron resonance cathode
Electric propulsion
Neutralizer
Microwave plasma
Review
