Snapshots of the core and beam distribution as a function of the strahl’s temperature for the cases listed in Table 2 at time ω_pct = 1000, when all simulations are saturated. Left: Beam phase-space distribution. Middle and right: Beam and core velocity distributions, respectively, averaged in x (blue lines), cut at x/λ_Dc = 0 (orange line) and at x/λ_Dc = 40 (green line). The vertical dashed lines indicate the theoretical estimates of the resonant velocity.