Theory of super-diffusion for the magnetopause

it is shown that the diffusivity in a plasma is enhanced over classical diffusion when long-range interactions produce a so-called #kappa#-distribution function. In this case classical parallel diffusion (heat flux) is modified. Perpendicular magnetized diffusion coefficients obtained assume a scaling D#propor to#k_BT/B"1"+"#delta# where #delta#<1. This scaling is closer to Bohm-scaling than any conventional theory is able to predict. The non-classical diffusion coefficients depend on time. As a consequence, the expected density profiles will not exhibit the conventional diffusive shapes. Applied to the diffusion at the magnetopause it is suggested that lower-hybrid drift turbulence or any other turbulence which is able to generate long tail particle distributions (e.g., kinetic Alfven wave turbulence) yields non-classical transverse diffusivities which may contribute to the population of the inner LLBL. (orig.)Available from FIZ Karlsruhe / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman