Self Organization and Transport in Electromagnetic Turbulence 2 -20 July 2001, Aix-en-Provence, France Second Announcement & Call for Abstracts

Scientific Programme

1. Transition from electrostatic (zero beta) to Alfvenic turbulence Linear physics : transition from electrostatic (e.g. interchange ) instabilities to Alfvèn waves. Non linear regime : same question. Role of kinetic effects. Key question : dependence of the turbulent flux on beta. Competition between various mechanisms of flow generation when increasing beta (Reynolds stress vs Maxwell tensor).
2. Transport issues Small scale electron transport (e.g. Electron Temperature Gradient driven modes). Mechanisms producing a significant electron transport with small scale (sub gyro-radius) instabilities (streamers, inverse cascade). Interplay between Kelvin-Helmholtz instabilities and streamers. Transport of test particles in an electromagnetic turbulence (in particular non diffusive behaviors).
3. Generalised anomalous Ohm's law. Derivation of a mean field Ohm's law in a plasma turbulence. Subcritical turbulent states driven by anomalous diffusion (e.g. current diffusive ballooning modes, micro-tearing modes). Related effects in turbulent dynamo ("alpha" effect,...). Role of turbulent resistivity and diffusion in reconnection processes (turbulent reconnection). Role of kinetic effects.
4. Structure formation, self-organization. Turbulence self-organization via the generation of macroscopic fields: dynamo effects (generation of large scale magnetic fields) and zonal flows (mesoscale velocity fluctuations). Competition zonal fields/ zonal flows. Competition zonal flows/streamers. Role of secondary instabilities (e.g. Kelvin-Helmholtz, micro-tearing modes). Avalanches.
5. Effect of macroscopic MHD on turbulence Generation of shear flow by a macroscopic MHD mode : impact on turbulent transport. Transition from macroscopic MHD modes to turbulence. Transport due to MHD modes (e.g. Edge Localized Modes in tokamaks). Role of a stochastic magnetic field on turbulence (e.g. ergodic divertor in tokamaks).

Abstract submission form

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Please return this completed form before April 17th, 2001 to :
     Xavier GARBET, Association EURATOM - CEA
     DRFC/SCCP - Bt. 513 - CEA/Cadarache
     F-13108 Saint Paul-lez-Durance, Cedex. France
     Fax : +33 (0)4.42.25.62.33 - E-mail : X. Garbet (CEA Cadarache)