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Fluctuation-induced electron transport in closed-drift Halldischarges

机译:漂移漂移霍尔中的波动诱导电子传输放电

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Summary form only given. Hall discharges are presently underdevelopment for use in space propulsion applications. These dischargesexhibit characteristic cross-field transport, which is enhanced byfluctuations in the electric field and plasma density. Our recentelectrostatic probe and laser-induced fluorescence measurements inclosed-drift coaxial geometry discharges indicate that the effectiveHall parameter ranges from 1-20. This value is much less than that basedon classical electron transport, and while it brackets the value typicalof anomalous Bohm transport, it is found to vary significantly along theaxial direction of the discharge, increasing to unusually low valuesnear the anode. In this paper, we shall present a comprehensive analysisof a large collection of data, which allows the determination of theeffective Hall parameter from measured steady-state discharge propertiesalong the channel. The dispersion characteristics of these fluctuations,believed to be responsible for the unusually low Hall parameters, arestudied with negatively-biased ion collection probes. The measuredoscillatory behavior of these discharges are interpreted using a linearperturbation analysis of the governing fluid equations for a magnetized,cylindrical plasma in which there are axial gradients in the plasmaproperties
机译:仅提供摘要表格。霍尔放电目前在 用于太空推进应用的开发。这些放电 表现出独特的跨场传输,这可以通过 电场和等离子体密度的波动。我们最近 静电探针和激光诱导的荧光测量 封闭漂移同轴几何放电表明有效 霍尔参数的范围是1-20。该值比基于 在经典电子传输中,同时它包含了典型的值 Bohm输运的异常,发现沿 放电的轴向,增加到异常低的值 在阳极附近。在本文中,我们将进行全面的分析 大量的数据,这可以确定 测得的稳态放电特性产生的有效霍尔参数 沿着渠道。这些波动的分散特性, 据信造成异常低的霍尔参数的原因是 用负偏离子收集探针进行了研究。实测 这些放电的振荡行为可以用线性来解释 磁化的控制流体方程的摄动分析, 圆柱形等离子体,其中等离子体中存在轴向梯度 特性

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