Electromagnetic fluctuation spectrum associated with the drift Alfven-cyclotron instability
SCIE
SCOPUS
- Title
- Electromagnetic fluctuation spectrum associated with the drift Alfven-cyclotron instability
- Authors
- Kicheol Rha; Ryu, CM; Peter H. Yoon
- Date Issued
- 2012-07
- Publisher
- AMER INST PHYSICS
- Abstract
- The present paper investigates the electromagnetic fluctuation spectrum associated with the drift Alfven-cyclotron instability by means of a two-dimensional particle-in-cell simulation, which may be plausibly associated with a current disruption event. The current disruption event shows localized high-amplitude electromagnetic fluctuations. In recent theories, these fluctuation characteristics are shown to correspond to the drift Alfven-cyclotron instability. A simulation is carried out to clarify this instability. The simulation shows that the drift Alfven-cyclotron instabilities are excited in two frequency regimes, a relatively low frequency mode propagating in a quasi-perpendicular direction while the second high-frequency branch propagating in a predominantly parallel propagation direction, consistent with observations as well as with a recent theory. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737601]
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12615
- DOI
- 10.1063/1.4737601
- ISSN
- 1070-664X
- Article Type
- Article
- Citation
- PHYSICS OF PLASMAS, vol. 19, no. 7, 2012-07
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