Reverse plasma motion driven by moderately screened rotating electric field in an electrodeless plasma thruster

Reverse plasma motion driven by moderately screened rotating electric field in an electrodeless plasma thruster
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无电极等离子体推进器中由适度屏蔽旋转电场驱动的反向等离子体运动

DOI:
10.7567/jjap.55.016202
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发表时间:
2015
影响因子:
1.5
通讯作者:
H. Nishida
H. Nishida
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
N. Ohnishi;Ryo Nomura;Takahiro T. Nakamura;H. Nishida

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在二维粒子模拟中发现,尽管理想的穿透旋转电场(REF)在旋转E × B漂移后驱动“正”的方位电流,但在中等屏蔽旋转电场(REF)下仍存在反向诱导的方位电流。这给我们带来了另一种加速概念,称为负移动响应(NMR)加速,在实际条件下使用会聚磁场的螺旋等离子体,因为内部电势,形成的等离子体响应对外部场,驱动“负”方位电流。在现实的实验条件下,例如,磁场为0.2 T,交流频率<100 MHz,交流电压<1000 V,在NMR加速度下,合成推力可估计为>0.1 mN的可观测水平。此外,反向REF比常规的正向REF更有利于NMR加速,因为反向场在会聚磁场中产生李萨如加速。
A reversely-induced azimuthal current has been found in two-dimensional particle simulations with moderately screened rotating electric field (REF) though an ideally penetrating REF drives a “positive” azimuthal current following rotating E × B drifts. This brings us an alternative acceleration concept, called a negative-moving response (NMR) acceleration, of the helicon plasma under practical conditions using a converging magnetic field because the internal electric potential, formed by the plasma response against the external field, drives the “negative” azimuthal current. Under realistic experimental conditions, e.g., a magnetic field of 0.2 T, AC frequency of <100 MHz, and AC voltage of <1000 V, the resultant thrust can be estimated at an observable level of >0.1 mN with the NMR acceleration. Moreover, the reverse REF is more favorable to the NMR acceleration than the conventional forward one because the reverse field produces a Lissajous acceleration in the converging magnetic field.
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