Attosecond gamma-ray flashes and electron-positron pairs in dyadic laser interaction with micro-wire

Abstract

The interaction of an ultra-intense laser with matter is an efficient source of high-energy particles, with efforts directed towards narrowing the divergence and simultaneously increasing the brightness. In this paper we report on emission of highly collimated, ultrabright, attosecond $\gamma$-photons and generation of dense electron-positron pairs via a tunable particle generation scheme which utilizes the interaction of two high-power lasers with a thin wire target. Irradiating the target with a radially polarized laser pulse first produces a series of high charge, short duration, electron bunches with low transverse momentum. These electron bunches subsequently collide with a counter-propagating high intensity laser. Depending on the intensity of the counter-propagating laser, the scheme generates highly collimated ultra-bright GeV-level $\gamma$-beams and/or electron-positron plasma of solid density level.

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Cited by in corpus (1)

• Collimated $\gamma$-flash emission along the target surface irradiated by a laser at non-grazing incidence