With the rapid development of high-power petawatt class lasers worldwide, exploring physics in the strong field QED regime will become one of the frontiers for laser–plasma interactions research. Particle-in-cell codes, including quantum emission processes, are powerful tools for predicting and analyzing future experiments where the physics of relativistic plasma is strongly affected by strong field QED processes. The spin/polarization dependence of these quantum processes has been of recent interest. In this article, we perform a parametric study of the interaction of two laser pulses with an ultrarelativistic electron beam. The first pulse is optimized to generate high-energy photons by nonlinear Compton scattering and efficiently decelerate electron beam through the quantum radiation reaction. The second pulse is optimized to generate electron–positron pairs by the nonlinear Breit–Wheeler decay of photons with the maximum polarization dependence. This may be experimentally realized as a verification of the strong field QED framework, including the spin/polarization rates.
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Li, Fei ; Decyk, Viktor K. ; Miller, Kyle G. ; Tableman, Adam ; Tsung, Frank S. ; Vranic, Marija ; Fonseca, Ricardo A. ; Mori, Warren B. ( , Journal of Computational Physics)null (Ed.)
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Albert, Félicie ; Couprie, M. E. ; Debus, Alexander ; Downer, Mike C. ; Faure, Jérôme ; Flacco, Alessandro ; Gizzi, Leonida A. ; Grismayer, Thomas ; Huebl, Axel ; Joshi, Chan ; et al ( , New Journal of Physics)
Abstract Plasma-based accelerators use the strong electromagnetic fields that can be supported by plasmas to accelerate charged particles to high energies. Accelerating field structures in plasma can be generated by powerful laser pulses or charged particle beams. This research field has recently transitioned from involving a few small-scale efforts to the development of national and international networks of scientists supported by substantial investment in large-scale research infrastructure. In this New Journal of Physics 2020 Plasma Accelerator Roadmap, perspectives from experts in this field provide a summary overview of the field and insights into the research needs and developments for an international audience of scientists, including graduate students and researchers entering the field.