Nondiffusive transport regimes for suprathermal ions in turbulent plasmas

A. Bovet, A. Fasoli, P. Ricci, I. Furno, K. Gustafson

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

The understanding of the transport of suprathermal ions in the presence of turbulence is important for fusion plasmas in the burning regime that will characterize reactors, and for space plasmas to understand the physics of particle acceleration. Here, three-dimensional measurements of a suprathermal ion beam in the toroidal plasma device TORPEX are presented. These measurements demonstrate, in a turbulent plasma, the existence of subdiffusive and superdiffusive transport of suprathermal ions, depending on their energy. This result stems from the unprecedented combination of uniquely resolved measurements and first-principles numerical simulations that reveal the mechanisms responsible for the nondiffusive transport. The transport regime is determined by the interaction of the suprathermal ion orbits with the turbulent plasma dynamics, and is strongly affected by the ratio of the suprathermal ion energy to the background plasma temperature.

langue originaleAnglais
Numéro d'article041101
journalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume91
Numéro de publication4
Les DOIs
Etat de la publicationPublié - 3 avr. 2015
Modification externeOui

Empreinte digitale

Examiner les sujets de recherche de « Nondiffusive transport regimes for suprathermal ions in turbulent plasmas ». Ensemble, ils forment une empreinte digitale unique.

Contient cette citation