霍尔推力器在没有阳极鞘层的情况下工作的可能性
The possibility of a Hall thruster operation in the absence of the anode sheath
摘要：
本文提出了一种确定陶瓷通道霍尔推力器准一维稳态模型边界条件的方法。对于一个给定的质量流率和磁场轮廓的施加条件的一个平滑的声波过渡唯一地确定在阳极等离子体密度。放电电压决定了阳极鞘层的结构，从而决定了阳极处的电子和离子速度。这些参数似乎足以构造具有给定温度分布的解。结果表明，通过选择合适的电子迁移率和温度分布，可以实现模拟和实验结果之间的良好相关性。从理论上研究了在放电电压、中性粒子进入速度和通道长度等较宽输入参数范围内电极鞘层的结构，并讨论了实现无鞘层工作机制的可能性。
英文摘要：
A method of determining boundary conditions for quasi 1-D modeling of steady-state operation of a Hall Thruster with ceramic channel is presented. For a given mass flow rate and magnetic field profile the imposed condition of a smooth sonic transition uniquely determines plasma density at the anode. The discharge voltage determines the structure of the anode sheath and thus determines electron and ion velocities at the anode. These parameters appear to be sufficient for constructing a solution with given temperature profile. It is shown that a good correlation between simulated and experimental results can be achieved by selecting an appropriate electron mobility and temperature profile. The structure of the electrode sheath was studied theoretically over a wide range of input parameters, such as discharge voltage, incoming neutral velocity and channel length, and the possibility of realization of the no-sheath operating regime is discussed here.
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