Acceleration of a pre-accelerated electron by an ultra-short and ultra-intense  laser pulse in vacuum

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Abstract
Acceleration of a pre-accelerated electron by an ultra-short and ultra-intense laser pulse in vacuum has been explored. The deceleration by the descending part of the laser pulse can be neglected when the pre-accelerated electron is accelerated by the ascending part of the pulse. Because the acceleration dist ance is much longer than for a initially stationary electron, the energy gain is much larger. The net energy gain can be up to 01GeV with a laser intensity of 1019W/cm2 and an initial electron energy of 45Me V. Final energy ga in of the electron as a function of its initial condition and laser parameters h as also been discussed.

Keywords:
electron acceleration /

femtosecond laser pulse /

energy gain
Authors and contacts
He Feng¹,

Yu Wei²,

Xu Han²,

Lu Pei-Xiang¹

(1)激光技术国家重点实验室，华中科技大学，武汉 430074;中国科学院上海光学精密机械研究所强光光学实验室，上海 201800; (2)中国科学院上海光学精密机械研究所强光光学实验室，上海 201800
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