Whistler waves in plasmas with time-varying magnetic field: Laboratory investigation

被引：10

作者：

Gushchin, Mikhail E. ^{[1
]}

Korobkov, Sergey V. ^{[1
]}

Kostrov, Alexander V. ^{[1
]}

Starodubtsev, Mikhail V. ^{[1
]}

Strikovsky, Askold V. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

来源：

ADVANCES IN SPACE RESEARCH | 2008年 / 42卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

laboratory modeling of VLF-ULF magnetospheric emissions; discrete magnetospheric signals; propagation of whistler waves; non-stationary plasmas with time-dependent magnetic field; whistler waves modulation by magnetic disturbances;

D O I：

10.1016/j.asr.2007.06.027

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Modulation of whistler waves in a plasma with time-dependant magnetic field perturbations was investigated experimentally. The experiments were performed on large "Krot" device, which was specially designed to study space plasma physics phenomena. It is shown that magnetic field variations on the wave propagation path can lead to splitting of initially continuous whistler wave into the sequence of bursts, whose repetition rate corresponds to magnetic field perturbation period. The frequency inside each burst is changing from its front edge to the back edge. Relative shift of the wave frequency can be as large as the relative magnetic disturbance. Distortion of whistler wave frequency spectrum after its passing through magnetically disturbed areas can be used as a diagnostics for low-frequency magnetic field variations. The applicability of our laboratory results to space plasma is discussed. (C) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：979 / 986

页数：8

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