Kinetic Model of Vacuum Plasma Expansion in a Cylindrical Gap

IF 0.9 4区 物理与天体物理 Q4 PHYSICS, FLUIDS & PLASMAS
V. Yu. Kozhevnikov, A. V. Kozyrev, A. O. Kokovin, N. S. Semenyuk
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引用次数: 0

Abstract

Results of a theoretical description of collisionless kinetics of radial expansion of two-component (electron–ion) plasma in the one-dimensional cylindrical formulation of the problem are presented. The electric-field mechanism of supersonic expansion of the plasma flame due to the motion of the electron–ion ensemble and self-consistent electric field in the diode with the potential difference applied to it is demonstrated. The spatiotemporal evolution of the ion energy distribution function, electric potential, and rate of expansion of the emission boundary of the plasma flame is shown. The calculated rates of flame expansion at the copper cathode (~1.5 × 106 cm/s) well agree with the experimental data.

Abstract Image

真空等离子体在圆柱形间隙中膨胀的动力学模型
摘要 介绍了在一维圆柱形问题公式中对双组分(电子-离子)等离子体径向膨胀的无碰撞动力学进行理论描述的结果。证明了等离子体火焰超音速膨胀的电场机制,该机制是由于电子-离子集合体的运动和二极管中施加电位差的自洽电场造成的。图中显示了离子能量分布函数、电势和等离子体火焰发射边界膨胀率的时空演变。计算得出的铜阴极火焰膨胀率(约 1.5 × 106 厘米/秒)与实验数据完全吻合。
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来源期刊
Plasma Physics Reports
Plasma Physics Reports 物理-物理:流体与等离子体
CiteScore
1.90
自引率
36.40%
发文量
104
审稿时长
4-8 weeks
期刊介绍: Plasma Physics Reports is a peer reviewed journal devoted to plasma physics. The journal covers the following topics: high-temperature plasma physics related to the problem of controlled nuclear fusion based on magnetic and inertial confinement; physics of cosmic plasma, including magnetosphere plasma, sun and stellar plasma, etc.; gas discharge plasma and plasma generated by laser and particle beams. The journal also publishes papers on such related topics as plasma electronics, generation of radiation in plasma, and plasma diagnostics. As well as other original communications, the journal publishes topical reviews and conference proceedings.
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