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Author Wang, H. Y. ♦ Yan, X. Q. ♦ Zepf, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ COLLISIONS ♦ ELECTRON BEAMS ♦ ENERGY SPECTRA ♦ KINETICS ♦ LASER RADIATION ♦ PHOTON EMISSION ♦ PONDEROMOTIVE FORCE ♦ PULSES ♦ QUANTUM ELECTRODYNAMICS ♦ STOCHASTIC PROCESSES ♦ THREE-DIMENSIONAL CALCULATIONS
Abstract Electron dynamics in the collision of an electron beam with a high-intensity focused ultrashort laser pulse are investigated using three-dimensional QED particle-in-cell (PIC) simulations, and the results are compared with those calculated by classical Landau and Lifshitz PIC simulations. Significant differences are observed from the angular dependence of the electron energy distribution patterns for the two different approaches, because photon emission is no longer well approximated by a continuous process in the quantum radiation-dominated regime. The stochastic nature of photon emission results in strong signatures of quantum radiation-reaction effects under certain conditions. We show that the laser spot size and duration greatly influence these signatures due to the competition of QED effects and the ponderomotive force, which is well described in the classical approximation. The clearest signatures of quantum radiation reaction are found in the limit of large laser spots and few cycle pulse durations.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-09-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 22
Issue Number 9


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