2018/07/31 by Alfred Mallet, K. G. Klein, Kristopher G. Klein +10
Mathematics · Physics and Astronomy · #Computational physics #Dissipation #Dynamo #Intermittency #Ionosphere and magnetosphere dynamics #Kurtosis #Landau damping #Magnetic confinement fusion research #Magnetic field #Mathematics #Mechanics #Nuclear physics #Physics #Plasma #Quantum mechanics #Solar and Space Plasma Dynamics #Statistical physics #Statistics #Turbulence #Unicode #physics.plasm-ph #physics.space-ph
paper · pdf · doi:10.1017/s0022377819000357
15 pages, 3 figures, accepted to JPP
arxiv created 2019/04/15 · openalex publication_date 2019/06/01 · arxiv updated 2019/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study the damping of collisionless Alfvénic turbulence in a strongly magnetised plasma by two mechanisms: stochastic heating (whose efficiency depends on the local turbulence amplitude \unicode[STIX]x1D6FFz_\unicode[STIX]x1D706 ) and linear Landau damping (whose efficiency is independent of \unicode[STIX]x1D6FFz_\unicode[STIX]x1D706 ), describing in detail how they affect and are affected by intermittency. The overall efficiency of linear Landau damping is not affected by intermittency in critically balanced turbulence, while stochastic heating is much more efficient in the presence of intermittent turbulence. Moreover, stochastic heating leads to a drop in the scale-dependent kurtosis over a narrow range of scales around the ion gyroscale.