  Transfer of free energy from large to small velocity-space scales by phase
mixing leads to Landau damping in a linear plasma. In a turbulent drift-kinetic
plasma, this transfer is statistically nearly canceled by an inverse transfer
from small to large velocity-space scales due to "anti-phase-mixing" modes
excited by a stochastic form of plasma echo. Fluid moments (density, velocity,
temperature) are thus approximately energetically isolated from the higher
moments of the distribution function, so phase mixing is ineffective as a
dissipation mechanism when the plasma collisionality is small.
