Rights statement: © 2017 American Physical Society
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Spin polarization of electrons by ultraintense lasers
AU - Del Sorbo, D.
AU - Seipt, D.
AU - Blackburn, T. G.
AU - Thomas, A. G. R.
AU - Murphy, C. D.
AU - Kirk, J. G.
AU - Ridgers, C. P.
N1 - © 2017 American Physical Society
PY - 2017/10/11
Y1 - 2017/10/11
N2 - 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%.
AB - 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%.
KW - ENERGY
KW - INTENSITY
KW - PARTICLES
KW - ELECTRODYNAMICS
KW - POSITRON
KW - FIELDS
U2 - 10.1103/PhysRevA.96.043407
DO - 10.1103/PhysRevA.96.043407
M3 - Journal article
VL - 96
JO - Physical review a
JF - Physical review a
SN - 2469-9926
IS - 4
M1 - 043407
ER -