We investigate the feasibility of precision counting experiments based on laser-electron beam interactions to verify strong-field quantum electrodynamic effects, with particular emphasis on the stochastic nature of photon emission, photon polarization, and spin asymmetry. A precise Monte-Carlo model is developed using photon packets with multi-dimensional phase-space weighting, hierarchical-mesh cumulative distribution functions, and a variable time-step method. This model quantitatively reproduces the highest edge of the photon energy spectrum and the positron yield in the previous SLAC E-144 experiment. The quantized radiation back-reaction determines the highest edge tail and thus the positron yield for higher laser intensities. The spin asymmetry in photon emission and spin flip determines photon polarization in the high-energy tail, while that in pair production can be observed through the large-angle positron scattering. Our simulations predict that these effects depend on the combination of the electron-beam energy and the laser intensity, and that they could be verified in future ELI-NP experiments using sub-GeV electron beams and optical lasers with intensities ~10^22W/cm2.
We investigate the nonlinear Compton photon source for upcoming laser-particle experiments in the collision scenario of high-energy electron beams and relativistic laser pulses. The stronger laser field could not only improve the scattering probability but also induce broader photon beam divergence. To maximize the pho...
Yu Xin, Zu-Dong Zhao, Suo Tang· arXiv.org· 0 citations
The generation of high-charge, highly polarized positron beams in the interaction of a linearly polarized laser pulse with a nanowire-array target is investigated. Here, laser-driven electrons emit high-energy photons through nonlinear Compton scattering (NCS), which subsequently produce electron--positron pairs throug...
De-Sheng Zhang, Cui-Wen Zhang, Kun Xue et al.· 0 citations
Inverse Compton sources --- in which a relativistic electron beam scatters a laser pulse to produce tunable, collimated, high-energy radiation --- have emerged as promising compact radiation sources, with applications in nuclear photonics, medical imaging, and nanoscale metrology. As laser intensities increase and elec...
Electron–positron pair production is one of the fundamental quantum electrodynamical (QED) processes and provides an important framework for investigating photon–matter interactions. In this work, the influence of linear photon polarization on electron–positron pair production in the electromagnetic field of the Be49 n...
Y. Althurwi, Saddah Alkhateeb, N. Almuallem· AppliedMath· 0 citations
The enhancement of atom-photon interactions with F-P cavities provides a suitable platform for studying quantum optics and atomic physics. However, the emission fields in linear F-P cavities are in the standing-wave mode, which leads to non-uniform atom-photon coupling and a short storage lifetime of cavity-enhanced sp...
Jia-Jin Lu, Min-Jie Wang, Hao-Le Jiao et al.· 0 citations
Laser polarization affects both the production of betatron x rays and their angular distribution, which together determine the photon yield collected within a fixed angular acceptance. We investigate these effects using particle-in-cell simulations of laser-wakefield acceleration with linearly polarized (LP) and circul...
A. Berceanu, V. Horný, D. Stutman et al.· 0 citations
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