Journal
PHYSICS OF PLASMAS
Volume 20, Issue 5, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4801513
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Funding
- EPSRC [EP/GO55165/1, EP/GO5495/1]
- Centre for Scientific Computing, University of Warwick
- EPSRC [EP/D062837/1, EP/G054940/1, EP/G055165/1, EP/G066752/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D062837/1, EP/G066752/1, EP/G054940/1] Funding Source: researchfish
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In simulations of a 12.5 PW laser (focussed intensity I = 4 x 10(23) Wcm(-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 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 320 PW (I = 10(25) Wcm(-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. (C) 2013 AIP Publishing LLC
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