Nondiffusive corrections to the long scale behaviour of ensembles of turbulent magnetic lines : Application of the functional method
The problem of the transversal spreading of the magnetic field lines in a turbulent plasma is investigated analytically in order to obtain a statistical characterisation at large spatial scales. A functional integral method has been developed which allows the systematic calculation of the statistical averages of physical quantities depending on the fluctuating field. The known magnetic diffusion coefficient for the shearless case is corrected with a term arising from the assumption of a finite transversal correlation length. For the case with magnetic shear the functional method provides the appropriate frame for a perturbative approach based on a series of diagrams.
Bibliographic Reference: Report: EUR-CEA-FC-1482 EN (1993) 46 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199310988 / Last updated on: 1994-11-29
Original language: en
Available languages: en