Spin polarization of electrons by ultraintense lasers

Del Sorbo, D. and Seipt, D. and Blackburn, T. G. and Thomas, A. G. R. and Murphy, C. D. and Kirk, J. G. and Ridgers, C. P. (2017) Spin polarization of electrons by ultraintense lasers. Physical review a, 96 (4). ISSN 2469-9926

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Abstract

Electrons in plasmas produced by next-generation ultraintense lasers (I > 5 x 10(22)W/cm(2)) can be spin polarized to a high degree (10%-70%) by the laser pulses on a femtosecond time scale. This is due to electrons undergoing spin-flip transitions as they radiate gamma-ray photons, preferentially spin polarizing in one direction. Spin polarization can modify the radiation reaction force on the electrons, which differs by up to 30% for opposite spin polarizations. Consequently, the polarization of the radiated gamma-ray photons is also modified: the relative power radiated in the sigma and pi components increases and decreases by up to 30%, respectively, potentially reducing the rate of pair production in the plasma by up to 30%.

Item Type:
Journal Article
Journal or Publication Title:
Physical review a
Additional Information:
© 2017 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
ID Code:
88518
Deposited By:
Deposited On:
05 Apr 2018 15:42
Refereed?:
Yes
Published?:
Published
Last Modified:
03 Apr 2020 04:13