skip to main content

SciTech ConnectSciTech Connect

Title: Ordinary mode instability associated with thermal ring distribution

The purely growing ordinary (O) mode instability driven by excessive parallel temperature anisotropy has recently received renewed attention owing to its potential applicability to the solar wind plasma. Previous studies of O mode instability have assumed either bi-Maxwellian or counter-streaming velocity distributions. For solar wind plasma trapped in magnetic mirror-like geometry such as magnetic clouds or in the vicinity of the Earth's collisionless bow shock environment, however, the velocity distribution function may possess a loss-cone feature. The O-mode instability in such a case may be excited for cyclotron harmonics as well as the purely growing branch. The present paper investigates the O-mode instability for plasmas characterized by the parallel Maxwellian distribution and perpendicular thermal ring velocity distribution in order to understand the general stability characteristics.
Authors:
;  [1] ;  [2] ;  [3]
  1. Institute of Physics and Electronics, University of Peshawar, Peshawar 25000 (Pakistan)
  2. Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States)
  3. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22408065
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; BOLTZMANN STATISTICS; COLLISIONLESS PLASMA; CYCLOTRON HARMONICS; DISTRIBUTION FUNCTIONS; LOSS CONE; MAGNETIC FIELDS; MAGNETIC MIRRORS; PLASMA INSTABILITY; RINGS; SHOCK WAVES; SOLAR WIND; TEMPERATURE DEPENDENCE; TRAPPING; VELOCITY