Ultrarelativistic electron beam polarization in single-shot interaction with an ultraintense laser pulse
Abstract
Spin-polarization of an ultrarelativistic electron beam head-on colliding with an ultraintense laser pulse is investigated in the quantum radiation-reaction 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. Due to 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 tens of femtoseconds. The proposed method demonstrates a way for relativistic electron beam polarization with currently achievable laser facilities.
Keywords
Cite
@article{arxiv.1812.07229,
title = {Ultrarelativistic electron beam polarization in single-shot interaction with an ultraintense laser pulse},
author = {Yan-Fei Li and Rashid Shaisultanov and Karen Z. Hatsagortsyan and Feng Wan and Christoph H. Keitel and Jian-Xing Li},
journal= {arXiv preprint arXiv:1812.07229},
year = {2019}
}