Most electron heat transport is not anomalous; it is a paleoclassical process in toroidal plasmas.
It is hypothesized that radial electron heat transport in magnetically confined toroidal plasmas results from paleoclassical Coulomb collision processes (parallel electron heat conduction and magnetic field diffusion). In such plasmas the electron temperature is equilibrated along magnetic field lines a long length L (>> poloidal periodicity length piR0q), which is the minimum of the electron collision length and an effective field line length. Thus, diffusing field lines induce a radial electron heat diffusivity M identical with L/(piR0q) approximately 10>>1 times the magnetic field diffusivity eta/mu0 approximately nue(c/omegap)2.
Callen
J D
JD
University of Wisconsin, Madison, WI 53706-1609, USA. callen@engr.wisc.edu