Initially Maxwellian distributions of test particles with v _th = 0.5 and 2  c _s are simulated for t = 20 L/ c _s (many eddy turnover times), with a high scattering rate ν = 10 ³  c _s / L. We show the initial (solid) and final (dotted) distributions, as well as at an intermediate time (dashed). Power-law tails develop in the velocity regime with the enhanced D∝ v ⁴ velocity diffusion in Figure 4. There is not, however, a "universal" power-law slope to the resulting distribution function. Instead, the slope depends on time, thermal velocity of the distribution, and pitch-angle scattering rate (the latter dependence is not explicitly shown here). f( v) shown here is the one-dimensional distribution function, normalized such that the density is n ₀ = ∫ dvf( v).