Suppression of phase mixing in drift-kinetic plasma turbulence

Author: 

Parker, J
Highcock, E
Schekochihin, A
Dellar, P

Publication Date: 

July 2016

Journal: 

PHYSICS OF PLASMAS

Last Updated: 

2019-09-11T05:24:06.34+01:00

Issue: 

7

Volume: 

23

DOI: 

10.1063/1.4958954

page: 

070703-070703

abstract: 

© 2016 Author(s). 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, and 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.

Symplectic id: 

612004

Download URL: 

Submitted to ORA: 

Submitted

Publication Type: 

Journal Article