(a) Collisionless damping rate of fast modes versus the wavenumbers k_⊥ and k_∥ normalized by the Larmor radius of protons r_cp with β ∼ 0.16; (b) cutoff scale of fast-mode turbulence due to viscous and collisionless damping in a warm ionized plasma as a function of the wave propagation angle to the magnetic field direction.