Pulsed plasma thrusters (PPTs) are an attractive form of micro-thrusters due to advantages such as their compactness and lightweight design compared to other electric propulsion systems. Experimental investigations on their plasma properties are beneficial in clarifying the complex process of plasma evolution during the micro-second pulse discharge of a PPT. In this work, the multi-dimensional evolutions of the light intensity of the PPT plasma with wavelength, time, and position were identified. The plasma pressure was obtained using an iterative process with composition calculations. The results show that significant ion recombination occurred in the discharge channel since the line intensities of CII, CIII, CIV, and FII decreased and those of CI and FI increased as the plasma moved downstream. At the center of the discharge channel, the electron temperature and electron density were in the order of 10 000 K and 10 17 cm −3 , respectively. These had maximum ...

中文翻译：

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脉冲等离子推进器放电通道中等离子体特性演变的实验研究

脉冲等离子推进器（PPT）是微型推力器的一种引人注目的形式，因为与其他电动推进系统相比，其紧凑性和轻巧设计等优点。对它们的等离子体特性进行实验研究有助于阐明PPT微秒脉冲放电过程中等离子体演化的复杂过程。在这项工作中，确定了PPT等离子体的光强度随波长，时间和位置的多维演变。使用具有组成计算的迭代过程获得血浆压力。结果表明，由于等离子体向下游移动，CII，CIII，CIV和FII的谱线强度降低，CI和FI的谱线强度升高，因此在放电通道中发生了明显的离子重组。在排放通道的中心，电子温度和电子密度分别为10000 K和10 17 cm -3。这些有最大...