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Acceleration of electrons by high intensity laser radiation in a magnetic field

Published online by Cambridge University Press:  14 February 2014

Robert Melikian*
Affiliation:
A.I. Alikhanyan National Science Laboratory, Yerevan, Armenia
*
Address correspondence and reprint requests to: Robert Melikian, A.I. Alikhanyan National Science Laboratory, Alikhanyan Brothers Str. 2, Yerevan 375036, Armenia. E-mail: [email protected]

Abstract

We consider the acceleration of electrons in vacuum by means of the circularly-polirized electromagnetic wave, propagating along a magnetic field. We show that the electron energy growth, when using ultra-short and ultra-intense laser pulses (1 ps, 1018 W/cm2, CO2 laser) in the presence of a magnetic field, may reach up to the value 2,1 GeV. The growth of the electron energy is shown to increase proportionally with the increase of the laser intensity and the initial energy of the electron. We find that for some direction of polarization of the wave, the acceleration of electrons does not depend on the initial phase of the electromagnetic wave. We estimate the laser intensity, necessary for the electron acceleration. In addition, we find the formation length of photon absorption by electrons, due to which one may choose the required region of the interaction of the electrons with the electromagnetic wave and magnetic field. We also show that as a result of acceleration of electrons in the vacuum by laser radiation in a magnetic field one may obtain electron beam with small energy spread of the order δε/ε ≤ 10−2.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2014 

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