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Published on: May 3, 2019
Fast-ion dynamics in the TEXTOR tokamak measured by collective Thomson scattering
H Bindslev1, S K Nielsen, L Porte
1EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark. henrik.bindslev@risoe.dk
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.
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