title: Cross-field transport by instabilities and blobs in a magnetized toroidal plasma.
abstract: The mechanisms for anomalous transport across the magnetic field are investigated in a toroidal magnetized plasma. The role of plasma instabilities and macroscopic density structures (blobs) is discussed. Examples from a scenario with open magnetic field lines are shown. A transition from a main plasma region into a loss region is reproduced. In the main plasma, which includes particle and heat source locations, the transport is dominated by the fluctuation-induced particle and heat flux associated with a plasma instability. On the low-field side, the cross-field transport is ascribed to the intermittent ejection of macroscopic blobs propagating toward the outer wall. It is shown that instabilities and blobs represent fundamentally different mechanisms for cross-field transport.
authors.affiliation: Centre de Recherches en Physique des Plasmas-Ecole Polytechnique Fédérale de Lausanne (EPFL), Association EURATOM-Confédération Suisse, CH-1015 Lausanne, Switzerland. mpodesta@pppl.gov
authors.forename: M
authors.initials: M
authors.lastname: Podestà
authors.forename: A
authors.initials: A
authors.lastname: Fasoli
authors.forename: B
authors.initials: B
authors.lastname: Labit
authors.forename: I
authors.initials: I
authors.lastname: Furno
authors.forename: P
authors.initials: P
authors.lastname: Ricci
authors.forename: F M
authors.initials: FM
authors.lastname: Poli
authors.forename: A
authors.initials: A
authors.lastname: Diallo
authors.forename: S H
authors.initials: SH
authors.lastname: Müller
authors.forename: C
authors.initials: C
authors.lastname: Theiler