The Thrust of a Collisional-Plasma Source
The Thrust of a Collisional-Plasma Source
复制标题
碰撞等离子体源的推力
DOI：
10.1109/tps.2010.2089067
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发表时间：
2011
影响因子：
1.5
通讯作者：
A. Fruchtman
中科院分区：
文献类型：
--
作者：
A. Fruchtman
一端打开的等离子体源所提供的推力，是根据碰撞率与电离率的任意比值来计算的。如果等离子体的对撞性较低，则离子抽运占主导地位，而出源的射流动量主要由等离子体携带。在碰撞状态下，中性粒子通过与离子的电荷交换碰撞而加速，导致中性粒子泵送，因此射流的大部分动量由中性气体携带。结果表明，在给定功率下，这些离子中性碰撞增加了推力。然而，传统定义的推进器效率，也反映了推进剂的利用率，在碰撞状态下是较低的。
The thrust provided by a plasma source, open at one end, is calculated for an arbitrary ratio of collision to ionization rates. If the plasma is of a low collisionality, ion pumping is dominant, and the momentum of the jet exiting the source is carried mostly by the plasma. In the collisional regime, neutrals are accelerated through charge-exchange collisions with ions, leading to neutral pumping, so that most of the momentum of the jet is carried by the neutral gas. It is shown that these ion-neutral collisions increase the thrust for a given power. However, the conventionally defined efficiency for a thruster, reflecting also the propellant utilization, is lower in the collisional regime.