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Dense Electron-Positron Pair Production in Ultra-intense Laser Cone Interaction

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Abstract

We propose an all-optical scheme for bright γ rays and dense positrons generation by irradiating a 1022 W/cm2 laser pulse onto an Al cone filled with near-critical-density plasmas. 2D QED-PIC simulations show that, radiation-reaction trapped dense electron bunches oscillate in the laser electric fields and emit high-energy γ photons. The multi-photon Breit-Wheeler process is thus initiated and abundant electron-positron pairs are generated with a positron density of 1027m−3 and flux up to 109, which may have diverse applications in future.

© 2016 Optical Society of America

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