Energy distribution of the electrons along the jet up to 0.1a (dotted line), a (dashed line), and the whole jet (solid line), for γ_j = 1.2, η_B = 10⁻² (top panel), and η_B = 1 (bottom panel). The contribution of the individual jet segments is color-coded, with the color scale representing the position of each segment along the jet. Segments have a constant length of dl = 10¹¹ cm ≈ 0.03a.