Fig. 7
From: Brilliant gamma-ray beam and electron–positron pair production by enhanced attosecond pulses
3D results and gamma-ray brilliance. a The monochrome stripes in the bottom (x–z plane) is the projection of the reflected EM (electromagnetic) field intensity distribution on the laser axis (y = 0 plane). The corresponding distribution in the z = 0 plane is projected in the x–y plane. The colorful cloud shows the γ-photon density distribution in the 3D volume. The photon density cross-section at x = 22λ is projected on the y–z plane. The black dots represent the generated positrons with the kinetic energy higher than 500 MeV. The figure is produced based on the 3D simulation results at t = 57 T0. b The brilliance of the γ-photon with respect to the photon energy
