Open AccessTime-Dependent Perpendicular Transport of Energetic Particles
Author(s) -
A. Shalchi
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1332/1/012014
Subject(s) - diffusion , physics , turbulence , statistical physics , magnetic field , coulomb , test particle , particle (ecology) , transverse plane , classical mechanics , perpendicular , diffusion process , anomalous diffusion , magnetosphere particle motion , mechanics , quantum mechanics , mathematics , geometry , innovation diffusion , computer science , knowledge management , oceanography , structural engineering , engineering , geology , electron
The motion of energetic particles in magnetic turbulence across a mean magnetic field can be explored analytically. The approach discussed in this paper allows for a full time- dependent description of the transport, including compound sub-diffusion. For the first time it is shown systematically that as soon as there is transverse structure of the turbulence, diffusion is restored even if no Coulomb collisions are invoked. Compared to other non-linear theories the new approach has the advantage that a diffusion approximation is no longer part of that theory. Criteria for sub-diffusion and normal Markovian diffusion are provided as well. A comparison with test-particle simulations is also discussed.