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Dense electron-positron plasmas and bursts of gamma-rays from laser-generated QED plasmas

Research output: Contribution to journalArticle

Author(s)

  • C. P. Ridgers
  • C. S. Brady
  • R. Duclous
  • J. G. Kirk
  • K. Bennett
  • T. D. Arber
  • A. R. Bell

Department/unit(s)

Publication details

JournalPhysics of Plasmas
DatePublished - 8 Apr 2013
Issue number5
Volume20
Original languageEnglish

Abstract

In simulations of a 12.5PW laser (focused intensity I = 4x10^23W/cm^2) striking a solid aluminium target 10% of the laser energy is converted to gamma-rays. A dense electron-positron plasma is generated with a maximum density of 10^26/m^3; seven orders of magnitude denser than pure e-e+ plasmas generated with 1PW lasers. When the laser power is increased to 320PW (I = 10^25W/cm^2) 40% of the laser energy is converted to gamma-ray photons and 10% to electron-positron pairs. In both cases there is strong feedback between the QED emission processes and the plasma physics; the de?fining feature of the new `QED-plasma' regime reached in these interactions.

Bibliographical note

Copyright (2013) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in (Phys. Plas., 20, 056701) and may be found at (pop.aip.org/resource/1/phpaen/v20/i5/p056701)

    Research areas

  • physics.plasm-ph

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