Control of electron beam polarization in the bubble regime of laser-wakefield acceleration

Fan, H C and Liu, X Y and Li, X F and Qu, J F and Yu, Q and Kong, Q and Weng, S M and Chen, M and Büscher, M and Gibbon, P and Kawata, S and Sheng, Z M (2022) Control of electron beam polarization in the bubble regime of laser-wakefield acceleration. New Journal of Physics, 24 (8). 083047. ISSN 1367-2630 (https://doi.org/10.1088/1367-2630/ac8951)

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Abstract

Electron beam polarization in the bubble regime of the interaction between a high-intensity laser and a longitudinally pre-polarized plasma is investigated by means of the Thomas-Bargmann-Michel-Telegdi equation. Using a test-particle model, the dependence of the accelerated electron polarization on the bubble geometry is analysed in detail. Tracking the polarization dynamics of individual electrons reveals that although the spin direction changes during both the self-injection process and acceleration phase, the former has the biggest impact. For nearly spherical bubbles, the polarization of electron beam persists after capture and acceleration in the bubble. By contrast, for aspherical bubble shapes, the electron beam becomes rapidly depolarized, and the net polarization direction can even reverse in the case of a oblate spheroidal bubble. These findings are confirmed via particle-in-cell simulations.

ORCID iDs

Fan, H C, Liu, X Y, Li, X F, Qu, J F, Yu, Q, Kong, Q, Weng, S M, Chen, M, Büscher, M, Gibbon, P, Kawata, S and Sheng, Z M ORCID logoORCID: https://orcid.org/0000-0002-8823-9993;
  • Item type:Article
    ID code:82262
    Dates:
    Date
    Event
    2 September 2022
    Published
    12 August 2022
    Accepted
    2 February 2022
    Submitted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:08 Sep 2022 09:41
    Last modified:11 Nov 2024 13:37
    URI:https://strathprints.strath.ac.uk/id/eprint/82262
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