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Title: γ-ray generation enhancement by the charge separation field in laser-target interaction in the radiation dominated regime

A new source of radiation can be created with a laser pulse of intensity ≈10{sup 23 }W/cm{sup 2} interacting with a slightly overdense plasma. Collective effects driven by the electrostatic field significantly enhance the synchrotron radiation. They impact on the laser energy repartition leading to a specific emission but also constitute a crucial element for the intense radiation production. They allow electrons to be accelerated over a length up to 10 laser wavelengths favoring emission of an intense radiation. It is shown that charge separation field depends on the ion mass and target thickness but also on laser polarization. These phenomena are studied with an one dimensional relativistic particle-in-cell code accounting for the classical radiation reaction force.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ; ;  [3]
  1. Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom)
  2. (France)
  3. University of Bordeaux - CNRS - CEA, CELIA, UMR 5107, F-33400 Talence (France)
Publication Date:
OSTI Identifier:
22407942
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 12; Other Information: (c) 2014 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; COMPUTERIZED SIMULATION; ELECTRONS; EMISSION; GAMMA RADIATION; INTERACTIONS; LASER RADIATION; LASER TARGETS; ONE-DIMENSIONAL CALCULATIONS; PLASMA DENSITY; POLARIZATION; PULSES; RELATIVISTIC RANGE; SYNCHROTRON RADIATION; WAVELENGTHS