非均匀电子束中轴对称三分量-古尔德模式的旋转不稳定性

IF 1.1 4区物理与天体物理 Q4 PHYSICS, FLUIDS & PLASMAS

Plasma Physics Reports Pub Date : 2025-07-16 DOI:10.1134/S1063780X24602311

N. A. Marusov

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引用次数: 0

摘要

在理想流体力学模型的框架内，研究了轴对称静电振荡在受轴向磁场约束的非均匀电子束中的不稳定性。在线性近似下导出了光束静电势的微扰方程。证明了在自非均匀电场中，光束的微分旋转影响了三分量-古尔德模的失稳。对光束密度模型剖面的不稳定本征模的空间结构进行了解析和数值计算，并对其谱进行了分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Rotational Instability of the Axisymmetric Trivelpiece–Gould Modes in the Inhomogeneous Electron Beam

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Rotational Instability of the Axisymmetric Trivelpiece–Gould Modes in the Inhomogeneous Electron Beam

Instability of axisymmetric electrostatic oscillations in an inhomogeneous beam of electrons confined by an axial magnetic field is studied within the framework of an ideal hydrodynamic model. The equation of perturbation of the beam electrostatic potential is derived in the linear approximation. It is demonstrated that the effects of differential beam rotation in self inhomogeneous electric field destabilize the Trivelpiece–Gould modes. The spatial structure of the unstable eigenmodes is calculated analytically and numerically for model profiles of the beam density, and their spectrum is analyzed.

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来源期刊

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.