title: Spectral measurements of runaway electrons by a scanning probe in the TEXTOR tokamak.
abstract: Energy spectral measurements of runaway electrons were performed by a scanning probe with high spatial and temporal resolution in the TEXTOR tokamak. The probe consists of ten YSO (Y(2)SiO(5):Ce) crystals, which are shielded by tungsten filters. The probe can resolve electrons with different energies between 4 and 30 MeV. An insertion of the probe to the plasma boundary several times during the discharge allowed spectral measurements of runaway electrons at different minor radial positions at the plasma edge as well as the study of runaway production in time. The high temporal resolution of the probe, 0.05 ms, enabled measurements of runaway electrons not only during low density discharges, but also during plasma disruptions.
authors.affiliation: ILPP, Heinrich-Heine-Universitaet Duesseldorf, D-40225 Duesseldorf, Germany. timur.kudyakov@uni-duesseldorf.de
authors.forename: T
authors.initials: T
authors.lastname: Kudyakov
authors.forename: K H
authors.initials: KH
authors.lastname: Finken
authors.forename: M
authors.initials: M
authors.lastname: Jakubowski
authors.forename: M
authors.initials: M
authors.lastname: Lehnen
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: O
authors.initials: O
authors.lastname: Willi