Emitting electron spectra (left) and corresponding photon spectra (right) for γ₂ that vary with respect to the reference model. The total injected electron energy is rather insensitive to γ₂. For γ₂ = (3000,5000,8000,10 000) we find Υ_inj = (0.7,0.8,0.9,0.9). In the case of γ₂ = 3000, we show the photon components produced by both target photon fields.