Ultrarelativistic electron beam polarization in single-shot interaction with an ultraintense laser pulse - INSPIRE

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Ultrarelativistic electron beam polarization in single-shot interaction with an ultraintense laser pulse

Dec 18, 2018

6 pages

Published in:

Phys.Rev.Lett. 122 (2019) 15, 154801

Published: Apr 20, 2019

e-Print:

1812.07229 [physics.plasm-ph]

DOI:

10.1103/PhysRevLett.122.154801

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Abstract: (APS)

Spin polarization of an ultrarelativistic electron beam head-on colliding with an ultraintense laser pulse is investigated in the quantum radiation-dominated regime. We develop a Monte Carlo method to model electron radiative spin effects in arbitrary electromagnetic fields by employing spin-resolved radiation probabilities in the local constant field approximation. Because of spin-dependent radiation reaction, the applied elliptically polarized laser pulse polarizes the initially unpolarized electron beam and splits it along the propagation direction into two oppositely transversely polarized parts with a splitting angle of about tens of milliradians. Thus, a dense electron beam with above 70% polarization can be generated in tensof femtoseconds with realistic laser pulses. The proposed method demonstrates a way for relativistic electron beam polarization with currently achievable laser facilities.

Plasma and Beam Physics

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