Numerical investigation of the surfatron acceleration efficiency of charged particles by wave packets in space plasma

被引：5

作者：

Shkevov, Rumen ^{[1
]}

Erokhin, Nikolay Sergeevich ^{[2
]}

Mikhailovskaya, Ludmila Anatolievna ^{[2
]}

Zolnikova, Nadezhda Nikolaevna ^{[2
]}

机构：

[1] Bulgarian Acad Sci, Space Res & Technol Inst, Sofia, Bulgaria

[2] Russian Acad Sci, Inst Space Res, Moscow V71, Russia

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2013年 / 99卷

关键词：

Space plasma; Surfatron acceleration; Phase plane; Nonlinear equation; Particles trapping; Relativistic particles; ELECTRON SURFING ACCELERATION;

D O I：

10.1016/j.jastp.2012.07.001

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A theoretical study of the efficiency of the relativistic acceleration of charged particles by a finite amplitude electromagnetic wave packet in space plasma is presented. The effect of surfatron mechanism particle acceleration is investigated by numerical analysis of the second-order, non-stationary, nonlinear equation for the wave packet phase at the particle trajectory. The influence of the phase and group velocities of the wave packet at the wave packet carrying frequency on the acceleration efficiency is studied. The optimal conditions for weakly relativistic particles captured by electromagnetic wave packets with the following highly relativistic charge acceleration are determined. The particle energy growth rate for the regime of surfatron relativistic acceleration is determined. The temporal dynamics of particle acceleration are investigated. The conclusion about the possibilities of ultrarelativistic surfatron acceleration of charges by a wave packet with a smooth amplitude envelope is given. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：73 / 77

页数：5

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