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Simultaneous analysis of ion and electron heat transport by power modulation in JET

F. Ryter, C. Angioni, C. Giroud, A.G. Peeters, T. Biewer, R. Bilato, E. Joffrin, T. Johnson, H. Leggate, E. Lerche2011年被引用 24Nuclear FusionIF 3出版社

Heating power modulation experiments using ion cyclotron resonance heating (ICRH) in the 3He minority scheme have been performed in the JET tokamak to investigate heat transport properties. This RF scheme provides a dominant localized ion heating, but also some electron heating, and therefore both ion and electron heat channels were modulated. This allows us to carry out a simultaneous transport analysis of ion and electron heat transport channels, including transient transport phenomena. This also provides an experimental assessment of the ICRH heat sources of the 3He scheme. The modulation approach, so far widely used for electron transport studies, has been validated for ion heat transport in these experiments and yields results on stiffness and threshold of the ion temperature gradient (ITG)-driven ion heat transport. The results for the electron channel demonstrate the importance of the ITG-driven, off-diagonal, contribution to electron heat transport in plasmas with significant ion heating.

日本語訳

JETトカマクにおいて、3Heマイノリティスキームを用いたイオンサイクロトロン共鳴加熱(ICRH)による加熱出力変調実験を実施し、熱輸送特性の調査を行った。このRF加熱方式は、支配的な局所イオン加熱を提供する一方で、一部の電子加熱も生じるため、イオンと電子の両方の熱チャネルが変調された。これにより、過渡輸送現象を含むイオンおよび電子の熱輸送チャネルの同時輸送解析が可能となった。また、この実験は3HeスキームにおけるICRH熱源の実験的検証も提供する。これまで電子輸送研究で広く用いられてきた変調手法が、これらの実験においてイオン熱輸送に対して検証され、イオン温度勾配(ITG)駆動イオン熱輸送の剛性と閾値に関する結果が得られた。電子に関する結果は、イオン加熱が顕著なプラズマにおける電子熱輸送へのITG駆動の非対角項の寄与の重要性を示している。

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jet高精度(タイトル一致)

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JETHeat transportElectron heat transport
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