Control of test particle transport in a turbulent electrostatic model of the Scrape Off Layer

Guido Ciraolo (1) , Philippe Ghendrih (2) , Yanick Sarazin (2) , Cristel Chandre (3, 4) , Ricardo Lima (3, 4) , Michel Vittot (3, 4) , Marco Pettini (5)

1 M2P2 - Modélisation et Simulation Numérique (en mécanique des fluides)
2 DRFC - Département de Recherche sur la Fusion Contrôlée
3 CPT - Centre de Physique Théorique - UMR 6207
4 CPT - Centre de Physique Théorique - UMR 7332
5 OAA - INAF - Osservatorio Astrofisico di Arcetri

The ${\bm E}\times{\bm B}$ drift motion of charged test particle dynamics in the Scrape Off Layer (SOL)is analyzed to investigate a transport control strategy based on Hamiltonian dynamics. We model SOL turbulence using a 2D non-linear fluid code based on interchange instability which was found to exhibit intermittent dynamics of the particle flux. The effect of a small and appropriate modification of the turbulent electric potential is studied with respect to the chaotic diffusion of test particle dynamics. Over a significant range in the magnitude of the turbulent electrostatic field, a three-fold reduction of the test particle diffusion coefficient is achieved.

Mots clés: turbulence; control; passive tracers; nonlinear dynamics

Domaines: Physique des plasmas [physics.plasm-ph]; Systèmes dynamiques [math.DS]; Dynamique Chaotique [nlin.CD]

Guido Ciraolo, Philippe Ghendrih, Yanick Sarazin, Cristel Chandre, Ricardo Lima, et al.. Control of test particle transport in a turbulent electrostatic model of the Scrape Off Layer. Journal of Nuclear Materials, 2007, 363-365, pp.550-554. ⟨hal-00183859⟩