Fast-ion redistribution due to sawtooth crash in the TEXTOR tokamak measured by collective Thomson scattering
- Nielsen, S.K.
- Bindslev, H.
- Salewski, M.
- Bürger, A.
- Delabie, E.G.
- Furtula, V.
- Kantor, M.
- Korsholm, S.B.
- Leipold, F.
- Meo, F.
- Michelsen, P.K.
- Moseev, D.
- Oosterbeek, J.W.
- Stejner, M.
- Westerhof, E.
- Woskov, P.
Publication date
January 2010
DOIAbstract
Here we present collective Thomson scattering measurements of 1D fast-ion velocity distribution functions in neutral beam heated TEXTOR plasmas with sawtooth oscillations. Up to 50% of the fast ions in the centre are redistributed as a consequence of a sawtooth crash. We resolve various directions to the magnetic field. The fast-ion distribution is found to be anisotropic as expected. For a resolved angle of 39¿ to the magnetic field we find a drop in the fast-ion distribution of 20–40%. For a resolved angle of 83¿ to the magnetic field the drop is no larger than 20%. (Some figures in this article are in colour only in the electronic version
Add to ORKG