Interplay between density profile and zonal flows in drift kinetic simulations of slab ITG turbulence
This paper reports on 4-dimensional drift kinetic simulations of the slab branch of the Ion Temperature Gradient driven turbulence in a cylinder. In the non-linear regime, the system is found to relax preferentially either via heat transport or via mean sheared flows, depending on the density profile. A strong density gradient appears to be stabilizing both linearly, by increasing the instability threshold, and non linearly, by activating sheared flows. This impedes the relaxation of the profiles and sustains a pressure transport barrier.
Bibliographic Reference: An oral paper given at: Theory of Fusion Plasmas Joint Varenna-Lausanne Int. Workshop Organised by: Centre de Recherches en Physique des Plasmas, Association EURATOM - Confederation Suisse Held at: Villa Monastero, Varenna (IT)
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: email@example.com
Record Number: 200417733 / Last updated on: 2004-11-02
Original language: en
Available languages: en