Figure 2

RAD: (a) radiation energy d\({\tilde{\varepsilon }}_{R}\)/[dθ sin(θ)] (rad⁻¹), and (b) photon number d\({\tilde{N}}_{R}\)/[dθ sin(θ)] (rad⁻¹), emitted in the region of −15° ≤ ϕ ≤ +15° of the azimuthal angle, see Fig. 1. The emitted photon number d\({\tilde{N}}_{R}\)/[dθ sin(θ)] in the whole 2π-region of the azimuthal angle: (c) all photon energies, and (d) the photon energies above 50 MeV. Blue-solid curves are with SE, and red-dotted curves are without SE. The employed laser and electron beam parameters are the same as in Fig. 1.