Publications by Alexander Schekochihin

Suppression of phase mixing in drift-kinetic plasma turbulence

Physics of Plasmas AIP Publishing 23 (2016) 1-5

JT Parker, EG Highcock, AA Schekochihin, P Dellar

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.

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