Development of Micro-Vacuum Arc Thruster with Extended Lifetime
Development of Micro-Vacuum Arc Thruster with Extended Lifetime
复制标题
长寿命微真空电弧推进器的研制
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Keidar
中科院分区：
文献类型：
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作者：
T. Zhuang;A. Shashurin;L. Brieda;M. Keidar
本文提出了一种新的真空电弧推力器结构，以延长其使用寿命。由于外加磁场的作用，阴极点的旋转导致均匀的等离子体产生和长时间运行的可能性。结果表明，磁场使推力器输出增大50倍。对推进器进行了动力学仿真。模拟结果与实验结果吻合较好。真空电弧推力器的结构，属于MVAT系列，是根据VAT 4的优点设计的。为了提供高效的等离子体输运，获得高度定向的羽流，并保持阴极点内的高离子速度，我们建议使用弯曲磁场。用12个探针组成的特殊装置测量了推力器通道外离子电流分布的时间演变。本文还对该推进器进行了初步数值分析。这个练习的主要目标是证明数值方法的可行性。结果表明，本文提出的MVAT结构是微推进的理想选择。讨论了真空电弧推力器的潜在应用。
This paper presents a new configuration of vacuum arc thruster with an aim to extend operational lifetime. Rotation of the cathode spot as a result of an applied magnetic field is demonstrated leading to uniform plasma generation and the possibility of long duration operation. It is shown that a magnetic field leads to an increase in the thruster output by a factor of fifty. Kinetic simulations of the thruster are performed. Simulated results are in good agreement with experimental observation. configuration of vacuum arc thruster belonging to the MVAT family designed by adapting the advantages of VAT 4 . In order to provide efficient plasma transport, obtain highly directional plume and to preserve high ion velocity contained in cathodic spot we propose to use a curved magnetic field. Special assembly of 12 single probes was used to measure the temporal evolution of the ion current distribution outside the thruster channel. This paper also describes the initial numerical analysis of the thruster. The primary goal of this exercise was to demonstrate the feasibility of the numerical approach. Based on the results, we demonstrate that the proposed new configuration of MVAT is a good candidate for micro-propulsion. Potential applications of the vacuum arc thruster will be discussed.