等离子体密度分布及其在轴对称等离子体中的探测扰动

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, APPLIED
Valery Godyak, Natalia Sternberg
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引用次数: 0

摘要

本文分析了一维轴对称圆柱形和环形等离子体在任意离子-原子碰撞度下的等离子体密度分布。研究了任意离子原子碰撞度下圆柱探针对等离子体密度的扰动。获得了低碰撞度时探针附近等离子体特性的分析表达式。等离子体是通过流体力学中性等离子体方程建模的,其中考虑了电离、离子惯性和非线性离子摩擦力(在低气体压力下主导等离子体传输)。在广泛的离子-原子碰撞度范围内,探针周围观察到了明显的等离子体密度损耗。所提供的结果预测了根据经典的朗缪尔探针程序得到的等离子体密度的低估,应该能让人们更好地理解在低气压下插入等离子体的静电、磁性和微波探针。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Plasma density distribution and its perturbation by probes in axially symmetrical plasma
An analysis of plasma density distributions at arbitrary ion–atom collisionality for one-dimensional axially symmetrical cylindrical and annular plasmas is presented. Perturbations of plasma densities caused by a cylindrical probe are studied for arbitrary ion–atom collisionality. Analytical expressions for the plasma characteristics near the probe for low collisionality have been obtained. The plasma was modeled by the hydrodynamic neutral plasma equations, taking into account ionization, ion inertia, and a non-linear ion frictional force, which dominates the plasma transport at low gas pressures. Significant plasma density depletion around the probe has been observed for a wide range of ion–atom collisionality. The presented results predict underestimation of plasma density obtained from the classical Langmuir probe procedure and should provide a better understanding of electrostatic, magnetic, and microwave probes inserted into plasmas at low gas pressure.
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来源期刊
Journal of Applied Physics
Journal of Applied Physics 物理-物理:应用
CiteScore
5.40
自引率
9.40%
发文量
1534
审稿时长
2.3 months
期刊介绍: The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces
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