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Title: Spatiotemporal evolution of ponderomotive electron heating in axially inhomogeneous collisionless plasma

We investigate the spatiotemporal focusing dynamics of a Gaussian laser pulse in preformed collisionless plasma subjected to an axial nonuniformity in the plasma density. In order to follow up the pulse dynamics, a nonlinear Schrödinger wave equation characterizing the beam spot size in space and time frame has been derived and solved numerically to investigate the propagation characteristics as the pulse advances in the plasma. The effect of inhomogeneity on focusing length and ponderomotive electron heating have been analyzed and illustrated graphically. It is seen that ponderomotive heating is quite sensitive to the inhomogeneity parameters and the energy gain by electrons can be optimized by suitable choice of parameters.
Authors:
 [1] ;  [2]
  1. Institute for Plasma Research (IPR), Gandhinagar (India)
  2. Institute of Physics, University of Pecs, Pecs 7624 (Hungary)
Publication Date:
OSTI Identifier:
22227972
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 7; 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; BEAM-PLASMA SYSTEMS; COLLISIONLESS PLASMA; ELECTRONS; GAIN; LASER RADIATION; LASERS; NONLINEAR PROBLEMS; NUMERICAL ANALYSIS; PLASMA DENSITY; PLASMA HEATING; PONDEROMOTIVE FORCE; SCHROEDINGER EQUATION