A simple electric thruster based on ion charge exchange
A simple electric thruster based on ion charge exchange
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一种基于离子电荷交换的简单电动推进器
DOI：
10.1088/0022-3727/40/8/011
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Khachan
中科院分区：
文献类型：
--
作者：
L. Blackhall;J. Khachan
提出了一种电推进器，它利用非对称空心阴极辉光放电的特性，喷射出高速中性原子的准直羽流。离子从非对称中空阴极内部向外静电加速，并与背景气体进行电荷交换，导致高能中性粒子被喷射，从而产生推力。该推进器是完全独立的，允许在放电中产生推力和束流中和。用多普勒谱测量了羽流中氢原子的速度，发现在5 千伏和100 W量级的外加电压和功率下，产生大于3×10~4 S的比冲。根据以前在类似放电中测量的离子密度，得到了1 mN的推力估计，功率输入约为1 kW。这项工作建立在最近关于从空心阴极放电中喷射高速中性粒子的工作的基础上。推进器的设计简单但有效，有可能获得更大的推力密度和成功的长期运行。
An electric thruster is presented that makes use of the properties of an asymmetric hollow cathode glow discharge that ejects a collimated plume of high velocity neutral atoms. Ions are accelerated electrostatically outwards from within the asymmetric hollow cathode and undergo charge exchange with the background gas resulting in energetic neutrals being ejected, thus producing thrust. This thruster is entirely self-contained allowing thrust generation and beam neutralization within the discharge. Doppler spectroscopy was used to determine the speed of atomic hydrogen in the plume and was found to produce a specific impulse greater than 3 × 104 s for applied voltages and powers of the order of 5 kV and 100 W, respectively. An estimate of the thrust of 1 mN for a power input in the order of 1 kW was obtained from previously measured ion densities in similar discharges. This work builds on recent work associated with the ejection of high velocity neutrals from hollow cathode discharges. The simple but effective design of the thruster has the potential for large thrust densities as well as successful long term operation.