Nonlinear Saturation of Cyclotron Maser Instability Associated with Energetic Ring-Beam Electrons

NCUIR > College of Earth Sciences > Graduate Institute of Space Science > journal & Dissertation > Item 987654321/27410

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27410

Title:	Nonlinear Saturation of Cyclotron Maser Instability Associated with Energetic Ring-Beam Electrons
Authors:	Lee,KH;Omura,Y;Lee,LC;Wu,CS
Contributors:	太空科學研究所
Keywords:	AURORAL KILOMETRIC RADIATION;SOLAR RADIO-BURSTS;DIRECT AMPLIFICATION;RELATIVISTIC DISPERSION;KINETIC CYCLOTRON;LOW CORONA;GENERATION;EMISSION;FREQUENCY
Date:	2009
Issue Date:	2010-06-29 18:37:53 (UTC+8)
Publisher:	中央大學
Abstract:	We study the cyclotron maser instability (CMI) driven by an energetic ring-beam distribution by a particle simulation to explain possible generation mechanisms of intense radiation phenomena observed in space. The main objective is to understand the nonlinear processes that control saturation of the emission process. Our study reveals new issues that have been overlooked in past literature. It is found that electrostatic wave modes excited by the electron beam instability compete with the electromagnetic waves excited by the CMI. Nonlinear effects of these electrostatic modes tend to redistribute the energy of the energetic electrons and make the physics more complicated. The CMI can be much less effective in a realistic case than it is anticipated theoretically.
Relation:	PHYSICAL REVIEW LETTERS
Appears in Collections:	[Graduate Institute of Space Science] journal & Dissertation

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