Dynamics of Ion and Electron Flows in the Penning Discharge Chamber

IF 1 4区 工程技术 Q4 MECHANICS Fluid Dynamics Pub Date : 2024-07-05 DOI:10.1134/S0015462824602286
S. T. Surzhikov
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Abstract

The two-fluid and two-temperature diffusion-drift model of gas-discharge plasma is used to study numerically the structure of the Penning discharge in a cylindrical discharge chamber at the molecular hydrogen pressure of 1 mTorr, the voltage between the electrodes of 500–1000 V, and the axial magnetic field induction of 0.001–0.2 T. Two regimes of existence of the Penning discharge are obtained in the calculations. These regimes differ qualitatively in the electrodynamic structure of the charged-particle flows of gas-discharge plasma, as well as there exist transient and extinction regimes in the weak and strong magnetic fields. The conditions under which the oscillatory motion of electron and ion flows develops in the paraxial regions are found. It is shown that the results of numerical simulation with the use of the diffusion-drift model make it possible to obtain consistent data in comparison with experiment, and at the same time to get an insight about the formation of the structure of flows of electric-discharge plasma particles. This makes it possible to explain the observed experimental data.

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潘宁放电室内的离子和电子流动力学
摘要 利用气体放电等离子体的双流体和双温度扩散漂移模型,数值研究了分子氢压力为1 mTorr、电极间电压为500-1000 V、轴向磁场感应为0.001-0.2 T的圆柱形放电腔中的潘宁放电结构。这两种状态在气体放电等离子体带电粒子流的电动力学结构上存在质的差异,在弱磁场和强磁场中也存在瞬态和消亡状态。研究发现了电子流和离子流的振荡运动在旁轴区发展的条件。研究表明,利用扩散漂移模型进行数值模拟的结果可以获得与实验相一致的数据,同时还可以深入了解放电等离子体粒子流结构的形成。这使得解释观测到的实验数据成为可能。
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来源期刊
Fluid Dynamics
Fluid Dynamics MECHANICS-PHYSICS, FLUIDS & PLASMAS
CiteScore
1.30
自引率
22.20%
发文量
61
审稿时长
6-12 weeks
期刊介绍: Fluid Dynamics is an international peer reviewed journal that publishes theoretical, computational, and experimental research on aeromechanics, hydrodynamics, plasma dynamics, underground hydrodynamics, and biomechanics of continuous media. Special attention is given to new trends developing at the leading edge of science, such as theory and application of multi-phase flows, chemically reactive flows, liquid and gas flows in electromagnetic fields, new hydrodynamical methods of increasing oil output, new approaches to the description of turbulent flows, etc.
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