title: Direct observation of current in type-I edge-localized-mode filaments on the ASDEX Upgrade tokamak.
abstract: Magnetically confined plasmas in the high confinement regime are regularly subjected to relaxation oscillations, termed edge localized modes (ELMs), leading to large transport events. Present ELM theories rely on a combined effect of edge current and the edge pressure gradients which result in intermediate mode number (n≅10-15) structures (filaments) localized in the perpendicular plane and extended along the field lines. By detailed localized measurements of the magnetic field perturbation associated to type-I ELM filaments, it is shown that these filaments carry a substantial current.
authors.affiliation: Consorzio RFX, Associazione Euratom-ENEA sulla Fusione, Padova, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Vianello
authors.forename: V
authors.initials: V
authors.lastname: Naulin
authors.forename: R
authors.initials: R
authors.lastname: Schrittwieser
authors.forename: H W
authors.initials: HW
authors.lastname: Müller
authors.forename: M
authors.initials: M
authors.lastname: Zuin
authors.forename: C
authors.initials: C
authors.lastname: Ionita
authors.forename: J J
authors.initials: JJ
authors.lastname: Rasmussen
authors.forename: F
authors.initials: F
authors.lastname: Mehlmann
authors.forename: V
authors.initials: V
authors.lastname: Rohde
authors.forename: R
authors.initials: R
authors.lastname: Cavazzana
authors.forename: M
authors.initials: M
authors.lastname: Maraschek