Coherent structures identified in two reversed field pinch experiments are interpreted as a dynamic balance of dipolar and monopolar vortices growing and evolving under the effect of the ExB flow shear. For the first time their contribution to the anomalous transport has been estimated in fusion related plasmas, showing that they can account for up to 50% of the total plasma diffusivity. The experimental findings indicate that the diffusion coefficient associated with the coherent structures depends on the relative population of the two types of vortices and is minimum when the two populations are equal. An interpretative model is proposed to explain this feature.

Spolaore, M., Antoni, V., Spada, E., Bergsaker, H., Cavazzana, R., Drake, J., et al. (2004). Vortex-induced diffusivity in reversed field pinch plasmas. PHYSICAL REVIEW LETTERS, 93(21), 1-4 [10.1103/PhysRevLett.93.215003].

Vortex-induced diffusivity in reversed field pinch plasmas

Martines E;
2004

Abstract

Coherent structures identified in two reversed field pinch experiments are interpreted as a dynamic balance of dipolar and monopolar vortices growing and evolving under the effect of the ExB flow shear. For the first time their contribution to the anomalous transport has been estimated in fusion related plasmas, showing that they can account for up to 50% of the total plasma diffusivity. The experimental findings indicate that the diffusion coefficient associated with the coherent structures depends on the relative population of the two types of vortices and is minimum when the two populations are equal. An interpretative model is proposed to explain this feature.
Articolo in rivista - Articolo scientifico
coherent structures; plasma turbulence; reversed field pinch; RFP;
English
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Spolaore, M., Antoni, V., Spada, E., Bergsaker, H., Cavazzana, R., Drake, J., et al. (2004). Vortex-induced diffusivity in reversed field pinch plasmas. PHYSICAL REVIEW LETTERS, 93(21), 1-4 [10.1103/PhysRevLett.93.215003].
Spolaore, M; Antoni, V; Spada, E; Bergsaker, H; Cavazzana, R; Drake, J; Martines, E; Regnoli, G; Serianni, G; Vianello, N
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/365600
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