title: Experimental observation of a magnetic-turbulence threshold for runaway-electron generation in the TEXTOR tokamak.
abstract: Magnetic turbulence is observed at the beginning of the current quench in intended TEXTOR disruptions. Runaway electron (RE) suppression has been experimentally found at magnetic turbulence larger than a certain threshold. Below this threshold, the generated RE current is inversely proportional to the level of magnetic turbulence. The magnetic turbulence originates from the background plasma and the amplitude depends strongly on the toroidal magnetic field and plasma electron density. These results explain the previously found toroidal field threshold for RE generation and have to be considered in predictions for RE generation in ITER.
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany and Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China.
authors.forename: L
authors.initials: L
authors.lastname: Zeng
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany.
authors.forename: H R
authors.initials: HR
authors.lastname: Koslowski
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany.
authors.forename: Y
authors.initials: Y
authors.lastname: Liang
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Lvovskiy
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany and ITER Organization, Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France.
authors.forename: M
authors.initials: M
authors.lastname: Lehnen
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Nicolai
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Pearson
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Rack
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Jaegers
authors.affiliation: Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany.
authors.forename: K H
authors.initials: KH
authors.lastname: Finken
authors.affiliation: Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Wongrach
authors.affiliation: Laboratoire de Physique des Plasmas-Laboratorium voor Plasmafysica, Association 'Euratom-Belgian state', Ecole Royale Militaire-Koninklijke Militaire School, Trilateral Euregio Cluster, 1000 Brussels, Belgium.
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research-Plasma Physics (IEK-4), Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany and Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, China and ITER Organization, Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France and Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany and Laboratoire de Physique des Plasmas-Laboratorium voor Plasmafysica, Association 'Euratom-Belgian state', Ecole Royale Militaire-Koninklijke Militaire School, Trilateral Euregio Cluster, 1000 Brussels, Belgium.
authors.lastname: Textor Team