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Title: Ultrafast polarization of an electron beam in an intense bichromatic laser field

Journal Article · · Physical Review A

In this work, we demonstrate the radiative polarization of high-energy electron beams in collisions with ultrashort pulsed bichromatic laser fields. Employing a Boltzmann kinetic approach for the electron distribution allows us to simulate the beam polarization over a wide range of parameters and determine the optimum conditions for maximum radiative polarization. Those results are contrasted with a Monte Carlo algorithm where photon emission and associated spin effects are treated fully quantum mechanically using spin-dependent photon emission rates. The latter method includes realistic focusing laser fields, which allows us to simulate a near-term experimentally feasible scenario of an 8 GeV electron beam scattering from a 1 PW laser pulse and provide a measurement that would verify the ultrafast radiative polarization in high-intensity laser pulses that we predict. Aspects of spin-dependent radiation reaction are also discussed, with spin polarization leading to a measurable (5%) splitting of the energies of spin-up and spin-down electrons.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; US Army Research Office (ARO); Engineering and Physical Sciences Research Council (EPSRC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1594529
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 100; ISSN PLRAAN; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Mapping electromagnetic fields structure in plasma using a spin polarized electron beam journal December 2019
Scaling laws for the depolarization time of relativistic particle beams in strong fields journal June 2020
Mapping electromagnetic fields structure in plasma using a spin polarized electron beam text January 2019
Scaling laws for the depolarization time of relativistic particle beams in strong fields text January 2020