Dense electron-positron plasmas and bursts of gamma-rays from laser-generated quantum electrodynamic plasmas
Dense electron-positron plasmas and bursts of gamma-rays from laser-generated quantum electrodynamic plasmas
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DOI：
10.1063/1.4801513
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发表时间：
2013-04
影响因子：
2.2
通讯作者：
C. Ridgers;C. Brady;R. Duclous;J. Kirk;K. Bennett;T. Arber;A. Bell
中科院分区：
文献类型：
--
作者：
C. Ridgers;C. Brady;R. Duclous;J. Kirk;K. Bennett;T. Arber;A. Bell
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.
