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Title: Self-focusing of a high-intensity laser in a collisional plasma under weak relativistic-ponderomotive nonlinearity

Self-focusing a laser beam in collisional plasma is investigated under the weak relativistic-ponderomotive nonlinearity. In this case, the plasma equilibrium density is modified and it causes generation of the nonlinearity due to the Ohmic heating of electrons, collisions, and the weak relativistic-ponderomotive force during the interaction of the laser beam with the plasma. Our theoretical and simulation results show that a significant nonlinearity in laser self-focusing can occur under the weak relativistic-ponderomotive regime for some appropriate simulation parameters.
Authors:
 [1] ; ;  [2] ; ;  [3]
  1. Department of Physics and Astrophysics, University of Delhi, Delhi 110 007 (India)
  2. Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom)
  3. Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22218358
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; BEAM-PLASMA SYSTEMS; COLLISIONAL PLASMA; ELECTRON COLLISIONS; JOULE HEATING; LASER RADIATION; LASERS; NONLINEAR PROBLEMS; PLASMA DENSITY; PLASMA SIMULATION; PONDEROMOTIVE FORCE; RELATIVISTIC PLASMA; RELATIVISTIC RANGE