Dense Electron-Positron Plasmas and Ultraintense γ rays from Laser-Irradiated Solids
Dense Electron-Positron Plasmas and Ultraintense γ rays from Laser-Irradiated Solids
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DOI：
10.1103/physrevlett.108.165006
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发表时间：
2012-04-19
影响因子：
8.6
通讯作者：
Bell, A. R.
中科院分区：
文献类型：
--
作者：
Ridgers, C. P.;Brady, C. S.;Bell, A. R.
在10PW激光撞击固体的模拟中，我们演示了通过与高能天体物理环境中的操作相同的过程来产生纯电子-正电子等离子体的可能性。最大正电子密度可以达到10(26)m(-3)，比以前的实验高出7个数量级。此外，35%的激光能量被转化为强度为10(22)W cm(-2)的伽马射线爆发，这可能是实验室中可用的最强的伽马射线源。在新的“QED-等离子体”体系中，这种吸收导致了对和伽马射线的产生以及经典等离子体物理之间的强反馈。
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 gamma rays of intensity 10(22) W cm(-2), potentially the most intense gamma-ray source available in the laboratory. This absorption results in a strong feedback between both pair and gamma-ray production and classical plasma physics in the new "QED-plasma" regime.