The multi-cusped field thruster is a unique electric thruster device, which has many advantages such as long lifetime, large-range thrust throttling ability, high thrust density, and low mass. The thruster employs several alternating polarity permanent magnets to create a periodic magnetic field with several cusps. Previous studies have indicated that the basic ionization and acceleration processes are directly related to the electron motion behavior, which mainly depends on the magnetic field characteristics. The magnet number and magnet stage length are two key magnetic field parameters that have important effects on the thruster performances. In this paper, both the magnet number and magnet stage length parameters are studied for the optimization of a 5 kW multi-cusped field thruster. The results indicate that the three-stage thruster has a better electron confinement than the two-stage thruster. It has lower ion energy loss at the wall, and shows a higher ionization rate. Th...

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5 kW多点磁场推进器的磁体级优化

多点场推进器是一种独特的电动推进器装置，具有寿命长，推力节流能力大，推力密度高，质量轻等优点。推进器采用多个交变极性永磁体以产生具有多个尖端的周期性磁场。先前的研究表明，基本的电离和加速过程与电子运动行为直接相关，而电子运动行为主要取决于磁场特性。磁体数和磁体级长度是两个重要的磁场参数，它们对推进器性能具有重要影响。本文研究了磁体数量和磁体级长度参数，以优化5 kW多尖头磁场推进器。结果表明，三级推进器比二级推进器具有更好的电子约束。它在壁上具有较低的离子能量损失，并具有较高的电离率。那个...