Advances in magnetized plasma propulsion and radiation shielding
Advances in magnetized plasma propulsion and radiation shielding
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DOI：
10.1109/eh.2004.1310849
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发表时间：
2004-06
期刊：
影响因子：
--
通讯作者：
R. Winglee
中科院分区：
文献类型：
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作者：
R. Winglee
微型磁层，即通过注入等离子体而膨胀的磁场，对空间探索有几个关键的应用，包括辐射屏蔽和通过与太阳风的动量耦合增加航天器的推力。这些系统很重要，因为这种充气可以在没有大型机械结构的情况下完成，因此是可变形技术的一个例子。本文使用多流体模拟来详细说明膨胀背后的物理原理，以及产生太阳风和其他高能粒子偏转的要求。结果表明，膨胀本身与一个反磁空穴的形成有关，该空穴在磁体前后产生磁场重排，这种重排极大地增强了系统使带电粒子向正方向偏转的能力。太阳风增加了系统的动量，对系统的推力产生100：1的杠杆作用，并增加了能量，以增加磁场能量密度，从而进一步增强了挑战高能粒子的能力，超过了微型磁层单独可以做的事情。在100‘S千瓦的功率水平下，GeV粒子的辐射屏蔽成为可能。
Mini-magnetosphere, that is magnetic field inflated by the injection of plasma have several applications key to the exploration of space, including radiation shielding and augmentation of spacecraft thrust through momentum coupling with the solar wind. The systems are important because this inflation can be done without large mechanical structures and as such represent an example of a transformable technology. This paper uses multi-fluid simulations to detail the physics behind the inflation and the requirements to produce deflection of solar wind and other energetic particles. It is shown that the inflation itself is associated with the formation of a diamagnetic cavity that produces the rearrangement of the magnetic field both in front of an behind the magnet, and that this rearrangement greatly enhances the ability of the system to deflect charges particles in the forward direction. The solar wind adds momentum into the system to produce a 100:1 leverage on the thrust of the system, and adds energy to increase the magnetic field energy density so that is ability to defied energetic particles is further increased above what the mini-magnetosphere can do alone. Radiation shielding of GeV particles then becomes possible at 100's kW power levels.