Dense electron-positron plasmas and ultraintense γ rays from laser-irradiated solids.

Dense electron-positron plasmas and ultraintense γ rays from laser-irradiated solids.

In simulations of a 10 PW laser striking a solid, we demonstrate the possibility of producing a pure electron-positron plasma by the same processes as those thought to operate in high-energy astrophysical environments. A maximum positron density of 10(26) m(-3) can be achieved, 7 orders of magnitude...

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Մատենագիտական մանրամասներ
Հիմնական հեղինակներ: Ridgers, C, Brady, C, Duclous, R, Kirk, J, Bennett, K, Arber, T, Robinson, A, Bell, A
Ձևաչափ: Journal article
Լեզու:English
Հրապարակվել է: 2012
Նկարագրություն
Ամփոփում:In simulations of a 10 PW laser striking a solid, we demonstrate the possibility of producing a pure electron-positron plasma by the same processes as those thought to operate in high-energy astrophysical environments. A maximum positron density of 10(26) m(-3) can be achieved, 7 orders of magnitude greater than achieved in previous experiments. Additionally, 35% of the laser energy is converted to a burst of γ rays of intensity 10(22) W cm(-2), potentially the most intense γ-ray source available in the laboratory. This absorption results in a strong feedback between both pair and γ-ray production and classical plasma physics in the new "QED-plasma" regime.

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