A high-speed charge-coupled device camera was used to capture images of the plume and acceleration channel of a Hall effect thruster during ignition at different discharge voltages. To better understand the influence of changes in the discharge voltage on the plasma parameters during thruster ignition, a particle-in-cell numerical model was used to calculate the distribution characteristics of the ion density and electric potential at different ignition moments under different discharge voltages. The results show that when the discharge voltage is high, the ion densities in the plume and acceleration channel are significantly higher at the initial phase of thruster ignition; with the gradual strengthening of the ignition process, the propellant avalanche ionization during thruster ignition occurs earlier and the pulse current peak increases. The main reason for these phenomena is that the change in the discharge voltage results in different energy acquisitions of the emitted ele...

中文翻译：

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放电电压对霍尔推进器着火过程影响的研究

在不同放电电压下点火期间，使用高速电荷耦合设备相机捕获霍尔效应推进器羽流和加速通道的图像。为了更好地理解推进器点火过程中放电电压变化对等离子体参数的影响，采用了单元格数值模型，计算了在不同放电电压下不同点火时刻离子密度和电势的分布特征。结果表明，当放电电压较高时，在推进器点火的初始阶段，羽流和加速通道中的离子密度显着较高；随着点火过程的逐渐加强，推进器点火期间的推进剂雪崩离子化发生得更早，脉冲电流峰值增大。