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dc.contributor.author | Lee, K. H. | en |
dc.contributor.author | Omura, Y. | en |
dc.contributor.author | Lee, L. C. | en |
dc.date.accessioned | 2012-11-02T06:07:27Z | - |
dc.date.available | 2012-11-02T06:07:27Z | - |
dc.date.issued | 2011-09 | - |
dc.identifier.issn | 1070-664X | - |
dc.identifier.uri | http://hdl.handle.net/2433/160674 | - |
dc.description.abstract | We carried out a series of 2D simulations to study the beam instability and cyclotron maser instability (CMI) with the initial condition that a population of tenuous energetic electrons with a ring-beam distribution is present in a magnetized background plasma. In this paper, weakly relativistic cases are discussed with the ring-beam kinetic energy ranging from 25 to 100 keV. The beam component leads to the two-stream or beam instability at an earlier stage, and the beam mode is coupled with Langmuir or whistler mode, leading to excitation of beam-Langmuir or beam-whistler waves. When the beam velocity is large with a strong beam instability, the initial ring-beam distribution is diffused in the parallel direction rapidly. The diffused distribution may still support CMI to amplify the X1 mode (the fundamental X mode). On the contrary, when the beam velocity is small and the beam instability is weak, CMI can amplify the Z1 (the fundamental Z mode) effectively while the O1 (the fundamental O mode) and X2 (the second harmonic X mode) modes are very weak and the X1 mode is not excited. In this report, different cases with various parameters are presented and discussed for a comprehensive understanding of ring-beam instabilities. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Institute of Physics | en |
dc.rights | Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in PHYSICS OF PLASMAS 18, 092110 (2011) and may be found at http://link.aip.org/link/?php/18/092110 | en |
dc.subject | cyclotron masers | en |
dc.subject | electron beam effects | en |
dc.subject | plasma instability | en |
dc.subject | plasma Langmuir waves | en |
dc.subject | plasma magnetohydrodynamics | en |
dc.subject | plasma simulation | en |
dc.subject | plasma-beam interactions | en |
dc.subject | relativistic plasmas | en |
dc.title | A 2D simulation study of Langmuir, whistler, and cyclotron maser instabilities induced by an electron ring-beam distribution | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.ncid | AA10987555 | - |
dc.identifier.jtitle | PHYSICS OF PLASMAS | en |
dc.identifier.volume | 18 | - |
dc.identifier.issue | 9 | - |
dc.relation.doi | 10.1063/1.3626562 | - |
dc.textversion | publisher | - |
dc.identifier.artnum | 092110 | - |
dc.relation.url | http://link.aip.org/link/?php/18/092110 | - |
dcterms.accessRights | open access | - |
出現コレクション: | 学術雑誌掲載論文等 |
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