title: Fast-ion dynamics in the TEXTOR tokamak measured by collective Thomson scattering.
abstract: Here we present the first measurements by collective Thomson scattering of the evolution of fast-ion populations in a magnetically confined fusion plasma. 150 kW and 110 Ghz radiation from a gyrotron were scattered in the TEXTOR tokamak plasma with energetic ions generated by neutral beam injection and ion cyclotron resonance heating. The temporal behavior of the spatially resolved fast-ion velocity distribution is inferred from the received scattered radiation. The fast-ion dynamics at sawteeth and the slowdown after switch off of auxiliary heating is resolved in time. The latter is shown to be in close agreement with modeling results.
authors.affiliation: EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark. henrik.bindslev@risoe.dk
authors.forename: H
authors.initials: H
authors.lastname: Bindslev
authors.forename: S K
authors.initials: SK
authors.lastname: Nielsen
authors.forename: L
authors.initials: L
authors.lastname: Porte
authors.forename: J A
authors.initials: JA
authors.lastname: Hoekzema
authors.forename: S B
authors.initials: SB
authors.lastname: Korsholm
authors.forename: F
authors.initials: F
authors.lastname: Meo
authors.forename: P K
authors.initials: PK
authors.lastname: Michelsen
authors.forename: S
authors.initials: S
authors.lastname: Michelsen
authors.forename: J W
authors.initials: JW
authors.lastname: Oosterbeek
authors.forename: E L
authors.initials: EL
authors.lastname: Tsakadze
authors.forename: E
authors.initials: E
authors.lastname: Westerhof
authors.forename: P
authors.initials: P
authors.lastname: Woskov