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Title: Theory of waves in pair-ion plasmas: Natural explanation of backward modes

Backward waves observed in the experiments by Oohara and Hatakeyama (Phys. Rev. Lett. 91, 205005 (2003)) are identified to be ion cyclotron harmonic waves inherent to the kinetic theory. The derived dispersion equation is based on exact solutions of the characteristic equations of the Vlasov equation in a bounded cylindrical coordinate system; it is different from its counterpart in unbounded plasmas, and it provides all the branches of the dispersion relations observed in the experiment. Positive and negative ions respond to a potential in the same time scale and cooperate to expose kinetic orbital behaviors to the macroscopic propagation characteristics. In addition, the experimental setting of the large Larmor radius makes higher harmonic ion cyclotron backward/forward waves observable. The large Larmor radius effects are naturally treated by a kinetic theory.
Authors:
 [1] ;  [2] ;  [3]
  1. Faculty of Policy Studies, Chuo University, Tokyo (Japan)
  2. Institute of Physics, Belgrade (Serbia)
  3. National Center for Physics, Islamabad (Pakistan)
Publication Date:
OSTI Identifier:
22218321
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; Other Information: (c) 2013 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; ANIONS; BOLTZMANN-VLASOV EQUATION; COORDINATES; CYLINDRICAL CONFIGURATION; DISPERSION RELATIONS; ELECTROMAGNETIC RADIATION; EXACT SOLUTIONS; LARMOR RADIUS; PLASMA POTENTIAL; PLASMA WAVES