Perspectives of implementing QED cascade production with the next generation of laser facilities

23rd International Laser Physics Workshop

Gelfer, E.G.^1 ; Mironov, A.A.^1 ; Fedotov, A.M.^1 ; Bashmakov, V.F.^2,3 ; Kostyukov, I.Yu.^2,3 ; Narozhny, N.B.^1

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow

115409, Russia^1

Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod

603950, Russia^2

Lobachevsky National Research University of Nizhni Novgorod, Nizhny Novgorod

603950, Russia^3

关键词: Beam-lines;    Carrier frequency;    Dynamical parameters;    Focused laser beams;    General formulas;    Intense laser field;    Laser facilities;    Slow electrons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012054/pdf
DOI  :  10.1088/1742-6596/594/1/012054

来源: IOP

【 摘 要 】

QED cascade in an intense laser field can start developing if the electron proper acceleration expressed in Compton units χ becomes of the order of unity. We derive a general formula expressing the quantum dynamical parameter χ(t) of an initially slow electron in an arbitrary electromagnetic field, which is valid for a time range t1/ω, where ω is the field carrier frequency. Using this formula, we identify a special field configuration of colliding focused laser beams, which provides cascade production at intensity of the order of 1023W/cm2. Such intensity is believed to become attainable with the new generation of laser facilities, particularly the ELI Beamlines, in the coming years.