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Title: Nonlinear resonance absorption of laser in an inhomogeneous plasma

A formalism of nonlinear resonance absorption of p-polarized laser in a plasma with density gradient is developed. The nonlinearity is taken to arise through the relativistic mass effect. As the laser incident at an angle to the density gradient approaches the turning point, dielectric swelling leads to field enhancement, causing strong electron mass enhancement and reduction in local plasma frequency. When the critical layer is within a laser wavelength away from the turning point, the laser field is greatly enhanced at the critical layer and absorption of the laser is strongly affected by the nonlinear effect.
Authors:
; ;  [1]
  1. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)
Publication Date:
OSTI Identifier:
22220669
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; 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; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; INHOMOGENEOUS PLASMA; LANGMUIR FREQUENCY; LASER RADIATION; LASERS; LAYERS; LIGHT TRANSMISSION; MASS; NONLINEAR PROBLEMS; RELATIVISTIC PLASMA; RELATIVISTIC RANGE; RESONANCE ABSORPTION