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Title: Wakes and precursor soliton excitations by a moving charged object in a plasma

We study the evolution of nonlinear ion acoustic wave excitations due to a moving charged source in a plasma. Our numerical investigations of the full set of cold fluid equations go beyond the usual weak nonlinearity approximation and show the existence of a rich variety of solutions including wakes, precursor solitons, and “pinned” solitons that travel with the source velocity. These solutions represent a large amplitude generalization of solutions obtained in the past for the forced Korteweg deVries equation and can find useful applications in a variety of situations in the laboratory and in space, wherever there is a large relative velocity between the plasma and a charged object.
Authors:
 [1] ;  [2] ;  [1]
  1. Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)
  2. (United States)
Publication Date:
OSTI Identifier:
22493879
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 2; Other Information: (c) 2016 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; CHARGED PARTICLES; EXCITATION; FLOW MODELS; ION ACOUSTIC WAVES; MATHEMATICAL SOLUTIONS; NONLINEAR PROBLEMS; PLASMA; PRECURSOR; SOLITONS; VELOCITY