Combined power spectrum of the three different datasets. The left and right panels respectively show the power spectrum with ion and neutrals at the smallest scales. The estimated MHD cutoff scale, 34 mpc, is marked by a vertical line. The fitted power law is shown by the dotted line, with exponents of β = 2.92 ± 0.11 and 2.94 ± 0.11 for the left and right panels, respectively.