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首页> 外文期刊>Plasma and Fusion Research >Experiment and Numerical Simulation of Peculiarities in the Development of Helium DC Discharge in Reflex Geometry
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Experiment and Numerical Simulation of Peculiarities in the Development of Helium DC Discharge in Reflex Geometry

机译：反射几何中氦直流放电发展过程中的特殊性实验与数值模拟

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摘要

Reflex discharge has a large number of applications. However, there is no analytical formula allowing for the specified geometry to calculate the current or spatial characteristics of the discharge a priori. To do this, we create two-component model of the discharge in a diffusion-drift approximation in a magnetic field. The conditions of breakdown have been investigated in the framework of the Townsend mechanism. Current-voltage (I-V) characteristics, temporal variation of the discharge current and average ion density, and spatial distributions of ions and electrons have been calculated. I-V discharge characteristics in the absence of magnetic field have been measured. Experiments have been carried out in the discharge with a cylindrical anode with a length of 180 cm, diameter of 90 cm and a flat circular cathode with a diameter of 4cm. The dependence of discharge current on the applied magnetic field has been determined. The dependence of steady-state discharge current on the order of electric and magnetic field switching has been studied. Comparison of theory with experiment provides qualitative agreement and it confirms the adequacy of the created model.
机译：反射放电有许多应用。但是，没有分析公式允许指定的几何形状先验地计算放电的电流或空间特性。为此，我们以磁场中的扩散漂移近似创建放电的两成分模型。在Townsend机制的框架内研究了崩溃的条件。已经计算出电流-电压（I-V）特性，放电电流的时间变化和平均离子密度以及离子和电子的空间分布。已经测量了在没有磁场的情况下的I-V放电特性。已经在放电中进行了实验，该放电使用长度为180 cm，直径为90 cm的圆柱形阳极和直径为4cm的扁平圆形阴极。已经确定了放电电流对所施加的磁场的依赖性。研究了稳态放电电流与电场和磁场切换顺序的关系。理论与实验的比较提供了定性的一致性，并证实了所创建模型的充分性。

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