Fast Ion Dynamics in Magnetically Confined Plasma Measured by Collective Thomson Scattering
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概要
- 論文の詳細を見る
Magnetically confined fusion plasmas are mostly heated by small populations of energetic ions. In current devices these fast ions are mainly generated by auxiliary heating, while in ITER fusion generated alpha particles will dominate. A multitude of MHD phenomena, some of them driven by the fast ions, can redistribute or eject the energetic ions prematurely, affecting fusion performance and potentially damaging walls. Theory and modeling of fast ion dynamics in fluctuating or turbulent plasmas is challenging and needs guidance from - and bench marking against - measurements of the fast ion dynamics. Collective Thomson Scattering (CTS) can provide such measurements of the confined fast ions. Here we present CTS measurements of the TEXTOR tokamak plasma which show fast ions responding to sawteeth and display slowdown evolution of the fast ion velocity distribution after switch off of neutral beam heating. The toroidal rotation velocity of the bulk ions is inferred from the measurements. Plans for an ITER fast ion CTS are also briefly discussed.
- 社団法人 プラズマ・核融合学会の論文
著者
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WESTERHOF Egbert
FOM-Institute for Plasma Physics Rijnhuizen, EURATOM-FOM, The Netherlands
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PORTE Laurie
CRPP, EURATOM-Confédération Suisse, EPFL, CH-1015 Lausanne, Switzerland
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NIELSEN Stefan
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
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BINDSLEV Henrik
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
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KORSHOLM Søren
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
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MEO Fernando
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
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MICHELSEN Poul
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
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MICHELSEN Susanne
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
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TSAKADZE Erekle
EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark
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WOSKOV Paul
MIT Plasma Science and Fusion Center, Cambridge, MA 02139,USA
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HOEKZEMA J.
EURATOM-Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, D-52425 Jülich, Germany
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OOSTERBEEK J.
EURATOM-Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, D-52425 Jülich, Germany