Fast-ion dynamics in the TEXTOR tokamak measured by collective Thomson scattering.
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.
Bindslev
H
H
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark. henrik.bindslev@risoe.dk
Nielsen
S K
SK
Porte
L
L
Hoekzema
J A
JA
Korsholm
S B
SB
Meo
F
F
Michelsen
P K
PK
Michelsen
S
S
Oosterbeek
J W
JW
Tsakadze
E L
EL
Westerhof
E
E
Woskov
P
P