Efficient generation of γ-photon from solid target irradiated by high-power laser pulses and pair production through the nonlinear Breit-Wheeler process

The efficient generation of γ-photons from a solid target irradiated by 1-100 PW laser pulses was proposed through QED particle-in-cell simulations [1-3]. The electron-positron (ep) pair creation and the radioactive nuclei production in the secondary high-Z material irradiated by the γ-photons produced have been studied in [4]. Another interesting application of those γ-photons is to collide them with a focused high-power laser pulse for the nonlinear Breit-Wheeler pair creation. A single high-power laser beam can be split into two, so one beam is to generate γ-photons from a solid target and the other to collide with the γ-photons for the ep pair creation. In this talk, theoretical estimation on the generation of γ-photons from a solid target and the ep pair production will be presented.