title: Experimental Validation of a Filament Transport Model in Turbulent Magnetized Plasmas.
abstract: In a wide variety of natural and laboratory magnetized plasmas, filaments appear as a result of interchange instability. These convective structures substantially enhance transport in the direction perpendicular to the magnetic field. According to filament models, their propagation may follow different regimes depending on the parallel closure of charge conservation. This is of paramount importance in magnetic fusion plasmas, as high collisionality in the scrape-off layer may trigger a regime transition leading to strongly enhanced perpendicular particle fluxes. This work reports for the first time on an experimental verification of this process, linking enhanced transport with a regime transition as predicted by models. Based on these results, a novel scaling for global perpendicular particle transport in reactor relevant tokamaks such as ASDEX-Upgrade and JET is found, leading to important implications for next generation fusion devices.
authors.affiliation: Max-Planck-Institute for Plasma Physics, Boltzmannstraße 2, Garching, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Carralero
authors.affiliation: Physik-Department E28, Technische Universität München, James-Franck-Straße 1, Garching, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Manz
authors.affiliation: VTT Technical Research Center of Finland, Helsinki, Finland.
authors.forename: L
authors.initials: L
authors.lastname: Aho-Mantila
authors.affiliation: Max-Planck-Institute for Plasma Physics, Boltzmannstraße 2, Garching, Germany.|Physik-Department E28, Technische Universität München, James-Franck-Straße 1, Garching, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Birkenmeier
authors.affiliation: EUROfusion Consortium, JET, Culham Science Centre, Abingdon, OX14 3DB, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Brix
authors.affiliation: Aalto University, Espoo, Finland.
authors.forename: M
authors.initials: M
authors.lastname: Groth
authors.affiliation: Max-Planck-Institute for Plasma Physics, Boltzmannstraße 2, Garching, Germany.|Institute of Materials Chemistry and Research, University of Vienna, Whringerstrasse 42, A-1090 Vienna, Austria.
authors.forename: H W
authors.initials: HW
authors.lastname: Müller
authors.affiliation: Max-Planck-Institute for Plasma Physics, Boltzmannstraße 2, Garching, Germany.|Physik-Department E28, Technische Universität München, James-Franck-Straße 1, Garching, Germany.
authors.forename: U
authors.initials: U
authors.lastname: Stroth
authors.affiliation: Consorzio RFX, C.so Stati Uniti 4,I-35127 Padova, Italy.|Ecole Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland.
authors.forename: N
authors.initials: N
authors.lastname: Vianello
authors.affiliation: Max-Planck-Institute for Plasma Physics, Boltzmannstraße 2, Garching, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Wolfrum