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Dense electron-positron plasmas and bursts of gamma-rays from laser-generated quantum electrodynamic plasmas
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Ridgers, C. P., Brady, Christopher S., Duclous, R., Kirk, J. G., Bennett, K., Arber, T. D. and Bell, A. R. (2013) Dense electron-positron plasmas and bursts of gamma-rays from laser-generated quantum electrodynamic plasmas. Physics of Plasmas, Volume 20 (Number 5). Article number 056701. doi:10.1063/1.4801513 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.4801513
Abstract
In simulations of a 12.5 PW laser (focussed intensity I=4×1023Wcm−2 ) striking a solid aluminum target, 10% of the laser energy is converted to gamma-rays. A dense electron-positron plasma is generated with a maximum density of 1026m−3 , seven orders of magnitude denser than pure e− e+ plasmas generated with 1PW lasers. When the laser power is increased to 320 PW ( I=1025Wcm−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 defining feature of the new “QED-plasma” regime reached in these interactions.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physics of Plasmas | ||||
Publisher: | American Institute of Physics | ||||
ISSN: | 1070-664X | ||||
Official Date: | 2013 | ||||
Dates: |
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Volume: | Volume 20 | ||||
Number: | Number 5 | ||||
Page Range: | Article number 056701 | ||||
DOI: | 10.1063/1.4801513 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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