Study of Interaction between Fast Ions and MHD Instabilities by Fusion Product Measurements in Joint European Torus
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- KIPTILY Vasily G.
- EURATOM / CCFE Fusion Association, Culham Science Centre
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- SHARAPOV Sergei E.
- EURATOM / CCFE Fusion Association, Culham Science Centre
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- GASSNER Thomas
- Euratom/OEAW Association, ITP, University of Innsbruck
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- PEREZ VON THUN Christian
- JET-EFDA Close Support Unit, Culham Science Centre Max-Planck-Institut für Plasmaphysik, EURATOM-Association IPP
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- PINCHES Simon D.
- ITER Organization
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- ALPER Barry
- EURATOM / CCFE Fusion Association, Culham Science Centre
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- CECIL Ed
- Colorado School of Mines
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- DARROW Douglass
- Princeton Plasma Physics Laboratory
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- GOLOBOROD’KO Victor
- Euratom/OEAW Association, ITP, University of Innsbruck Institute for Nuclear Research
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- HELLESEN Carl
- Department of Physics and Astronomy, Uppsala University
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- MAILLOUX Joelle
- EURATOM / CCFE Fusion Association, Culham Science Centre
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- MORRIS William
- EURATOM / CCFE Fusion Association, Culham Science Centre
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- YAVORSKIJ Victor
- Euratom/OEAW Association, ITP, University of Innsbruck Institute for Nuclear Research
抄録
Fast ion redistribution and losses caused by plasma disruptions, Toroidal Alfvén Eigenmodes (TAE) and fishbones are measured with a suite of improved gamma-ray diagnostics, Neutral Particle Analyser (NPA), neutron spectrometry, Faraday Cups and a Scintillator Probe (SP). Fast ion populations in the MeV energy range were generated in fusion reactions and were also produced by 3rd harmonic Ion Cyclotron Resonance Heating (ICRH). Significant fast ion losses preceding plasma disruptions were often detected by SP in discharges with high βN. These losses were caused by the m=2/n=1 kink mode and typically occurred at the time of thermal quench, before the current quench. Core-localised TAE modes inside the q=1 radius causing redistribution of the fast ions in the resonance energy range were directly measured for the first time with the gamma-ray camera, confirming that the TAE instability expels fast ions from inside the q=1 radius and triggers the monster sawtooth crashes. Energy and pitch angle resolved SP measurements of lost fusion products in the MeV energy range were found to correlate with low-frequency fishbone oscillations driven by 100 keV beam ions. The origin and amplitude of these non-resonant losses are investigated.
収録刊行物
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- Plasma and Fusion Research
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Plasma and Fusion Research 8 (0), 2502071-2502071, 2013
一般社団法人 プラズマ・核融合学会
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詳細情報 詳細情報について
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- CRID
- 1390001205253103488
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- NII論文ID
- 130005078550
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- ISSN
- 18806821
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可