Fast-Ion Dynamics in the TEXTOR Tokamak Measured by Collective Thomson Scattering

H. Bindslev, S. K. Nielsen, L. Porte, J. A. Hoekzema, S. B. Korsholm, F. Meo, P. K. Michelsen, S. Michelsen, J. W. Oosterbeek, E. L. Tsakadze, E. Westerhof, and P. Woskov (the TEXTOR team)

Phys. Rev. Lett. 97, 205005 – Published 16 November 2006

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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Received 13 September 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.205005

Authors & Affiliations

H. Bindslev^1,*, S. K. Nielsen¹, L. Porte⁵, J. A. Hoekzema², S. B. Korsholm^1,3, F. Meo¹, P. K. Michelsen¹, S. Michelsen¹, J. W. Oosterbeek², E. L. Tsakadze¹, E. Westerhof⁴, and P. Woskov³ (the TEXTOR team)

¹EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
²EURATOM-Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, D-52425 Jülich, Germany
³MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
⁴FOM-Institute for Plasma Physics Rijnhuizen, EURATOM-FOM, The Netherlands
⁵CRPP, EURATOM-Confédération Suisse, EPFL, CH-1015 Lausanne, Switzerland

^*Electronic address: henrik.bindslev@risoe.dk

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Issue

Vol. 97, Iss. 20 — 17 November 2006

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