Energies in the cocoon as a function of time for all models. Left: Time evolution of different energy components of the cocoon for model A (dotted lines), B (solid lines), and C (dashed lines), respectively. We define the cocoon as grids with an electron temperature higher than 10⁸ K. Right: Time evolution of the ratio between the magnetic field and the electron energy for model A (dotted lines), B (solid lines), and C (dashed lines).