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Abstract

It is shown in this paper that turbulence propagation in a tokamak can be due to toroidal or nonlinear mode coupling. An analytical analysis indicates that the toroidal coupling acts through convection while the nonlinear effects induce diffusion. Numerical simulations suggest that the toroidal propagation is usually the fastest process, except perhaps in some highly turbulent regimes. The consequence is the possibility of non-local effects on the fluctuation level and the associated transport.

Additional information

Authors: GARBET X, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);LAURENT L, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);SAMAIN A, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);CHINARDET J, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Report: EUR-CEA-FC-1506 EN (1993)
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199410037 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: en
Available languages: en