The evolution of the fraction between different types of orbits from t = 100 to t = 300. In all plots, the buckling stage (t = 150 − 200) is highlighted by vertical lines. From left to right: among orbits in ILR (the bar), among ILR orbits captured in vILR (BAN), among ILR orbits passing through vILR (heating), among ILR orbits with increasing resonant angle θ_z − θ_R (vCIR+, flat orbits) and among ILR orbits with decreasing resonant angle θ_z − θ_R (vCIR−). The different types of orbits in plots, starting with the second, are shown in the same colors used in the first plot. All types correspond to those shown in Fig. 1.