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Title: The instability condition of the aperiodic ordinary mode for new scalings of the counterstreaming parameters

The aperiodic ordinary (O-) mode instability in homogeneous and collisionless plasmas with kinetic anisotropies has recently received renewed attention due to its potential application in the solar wind, as well as for equal-mass plasmas. The present paper revisits the marginal instability condition of the O-mode derived from the electromagnetic linear dispersion equation for waves propagating perpendicular to the background magnetic field. For a counterstreaming bi-Maxwellian plasma system, this condition is found to be significantly affected by the streaming parameters. New functional dependencies (not studied before) of the counterstreaming parameters on the magnetic field and the other plasma parameters lead to new conditions of this instability for the both equal mass and electron-proton plasmas.
Authors:
;  [1] ;  [1] ;  [2]
  1. Institut für Theoretische Physik, Lehrstuhl IV: Weltraum- and Astrophysik, Ruhr-Universität, Bochum (Germany)
  2. (Belgium)
Publication Date:
OSTI Identifier:
22408082
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; COLLISIONLESS PLASMA; DISPERSION RELATIONS; ELECTRON-PROTON INTERACTIONS; ELECTRONS; MAGNETIC FIELDS; PLASMA INSTABILITY; PROTONS; SOLAR WIND; WAVE PROPAGATION