A system of reduced equations is proposed for electron motion in the strongly radiation-dominated regime for an arbitrary electromagnetic field configuration.The approach developed here is used to analyze various scen...A system of reduced equations is proposed for electron motion in the strongly radiation-dominated regime for an arbitrary electromagnetic field configuration.The approach developed here is used to analyze various scenarios of electron dynamics in this regime:motion in rotating electric and magnetic fields and longitudinal acceleration in a plane wave and in a plasma wakefield.The results obtained show that this approach is able to describe features of electron dynamics that are essential in certain scenarios,but cannot be captured in the framework of the original radiation-free approximation[Samsonov et al.,Phys.Rev.A 98,053858(2018)and A.Gonoskov and M.Marklund,Phys.Plasmas 25,093109(2018)].The results are verified by numerical integration of the nonreduced equations of motion with account taken of radiation reaction in both semiclassical and fully quantum cases.展开更多
The development of a self-sustained quantum electrodynamical(QED)cascade in a single strong laser pulse is studied analytically and numerically.A hydrodynamical approach is used to construct an analytical model of cas...The development of a self-sustained quantum electrodynamical(QED)cascade in a single strong laser pulse is studied analytically and numerically.A hydrodynamical approach is used to construct an analytical model of cascade evolution,which includes the key features of the cascade observed in 3D QED particle-in-cell(QED-PIC)simulations,such as the magnetic field dominance in the cascade plasma and laser energy absorption.The equations of the model are derived in closed form and solved numerically.Direct comparison between the solutions of the model equations and 3D QED-PIC simulations shows that our model is able to describe the complex nonlinear process of cascade development qualitatively well.Various regimes of the interaction based on the intensity of the laser pulse are revealed in both the solutions of the model equations and the results of the QED-PIC simulations.展开更多
基金supported by the Ministry of Science and Higher Education of the Russian Federation(Agreement No.075-15-2020-906,Center of Excellence“Center of Photonics”).
文摘A system of reduced equations is proposed for electron motion in the strongly radiation-dominated regime for an arbitrary electromagnetic field configuration.The approach developed here is used to analyze various scenarios of electron dynamics in this regime:motion in rotating electric and magnetic fields and longitudinal acceleration in a plane wave and in a plasma wakefield.The results obtained show that this approach is able to describe features of electron dynamics that are essential in certain scenarios,but cannot be captured in the framework of the original radiation-free approximation[Samsonov et al.,Phys.Rev.A 98,053858(2018)and A.Gonoskov and M.Marklund,Phys.Plasmas 25,093109(2018)].The results are verified by numerical integration of the nonreduced equations of motion with account taken of radiation reaction in both semiclassical and fully quantum cases.
基金This research was supported by the Russian Science Foundation(Grant No.20-12-00077)(PIC simulations,development of the analytical model,numerical scheme,and numerical solution of the model equations)the Foundation for the Advancement of Theoretical Physics and Mathematics“BASIS”(Grant No.19-1-5-10-1)(comparison to the simplified model developed in Ref.37).
文摘The development of a self-sustained quantum electrodynamical(QED)cascade in a single strong laser pulse is studied analytically and numerically.A hydrodynamical approach is used to construct an analytical model of cascade evolution,which includes the key features of the cascade observed in 3D QED particle-in-cell(QED-PIC)simulations,such as the magnetic field dominance in the cascade plasma and laser energy absorption.The equations of the model are derived in closed form and solved numerically.Direct comparison between the solutions of the model equations and 3D QED-PIC simulations shows that our model is able to describe the complex nonlinear process of cascade development qualitatively well.Various regimes of the interaction based on the intensity of the laser pulse are revealed in both the solutions of the model equations and the results of the QED-PIC simulations.
