The effect of the electron's spin magnetic moment on quantum radiation in strong electromagnetic fields
arXiv:2502.10270 · doi:10.1088/1367-2630/ade46b
Abstract
Ultra-intense laser pulses can create sufficiently strong fields to probe quantum electrodynamics effects in a novel regime. By colliding a 60 GeV electron bunch with a laser pulse focussed to the maximum achievable intensity of Wcm, we can reach fields much stronger than the critical Schwinger field in the electron rest frame. When the ratio of these fields we find that the hard ( \thinspace GeV) radiation from the electron has a substantial contribution from spin-light. 33% more photons are produced above this energy due to spin-light, the radiation resulting from the acceleration of the electron's intrinsic magnetic moment. This increase in high-energy photons results in 14% more positrons produced with energy above GeV. Furthermore, the enhanced photon production due to spin-light results in a 46% increase in the electron recoil radiation reaction. These observable signatures provide a potential route to observing spin-light in the strongly quantum regime () for the first time.
arXiv comment24 pages, 7 figures, submitted to New Journal of Physics
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