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

R. Capdessus, M. Lobet, E. d'Humieres, V. T. Tikhonchuk

Research output: Contribution to journalArticle

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Abstract

A new source of radiation can be created with a laser pulse of intensity 1023W/cm2 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.
Original languageEnglish
Article number123120
Number of pages11
JournalPhysics of Plasmas
Volume21
DOIs
Publication statusPublished - 30 Dec 2014

Keywords

  • radiation
  • gamma-ray
  • laser pulse
  • synchrotron radiation
  • electron acceleration
  • intense radiation
  • laser polarization
  • high intensity laser pulse interaction
  • electron equation of motion
  • electrostatic field
  • synchrotron radiation computation algorithm
  • simulation parameters
  • laser plasma interaction
  • laser absorption
  • target thickness
  • charge separation field

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