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来源：百度知道 编辑：UC知道 时间：2024/05/25 02:05:16
稳态等离子体推进器（SPT）是利用电子在电磁场中运动时形成的霍尔效应使得推进剂原子电离并使生成的离子在静电场中加速，从而产生推力，它具有比冲大、效率高和有效载荷率大的特点，广泛应用于卫星的位置保持、姿态控制和轨道转移等任务。SPT是以电磁联合工作为基础的，合适的磁场是发动机正常工作的基础，直接影响着发动机的工作性能，因此磁场的设计至关重要，是SPT的设计核心。SPT通常使用氙气做工质，但地球上的氙气含量低，其原子质量又较大，不易获得高比冲，而氪气的原子质量比较轻，从而很容易获得高比冲，故本次毕业设计是利用氪气作为工质。
本文是通过Femm有限元软件调试出SPT-K0不同磁场聚焦程度和“零磁点”在加速通道中不同位置的磁场位形，并通过实验，测量出各磁场位型下所对应的震荡、放电电流和推力器的其它性能，总结规律，为进一步的磁路优化设计提供依据，同时在此基础上进行新磁极设计。
在SPT外磁极金属表面利用微弧氧化技术涂镀上一层三氧化二铝陶瓷，并进行实验观测比较不同结构的优劣。

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Stationary plasma thruster (SPT) is the use of electronic campaign electromagnetic field formed Hall effect makes the original propellant make-ionization ion generation in the electrostatic field to accelerate, thereby creating thrust, it has specific impulse, high efficiency and large payload rate characteristics, which are widely used to maintain the position of the satellite, attitude control and orbit transfer, and other tasks. SPT is based on electromagnetic basis for joint work, the magnetic field is suitable engine based on normal work, a direct impact on engine performance, the design of the magnetic field is crucial, SPT is the core design. SPT normally use xenon gas quality work, but on the planet Xenon gas content is low, its atomic mass is large and difficult to obtain high specific impulse, Krypton gas and the relatively light atoms, which can easily obtain high specific impulse, the graduation of this design is the use of krypton gas as a working