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Poloidal inhomogeneity of turbulence in the FT-2 tokamak by radial correlation Doppler reflectometry and gyrokinetic modelling

A B Altukhov, A D Gurchenko, E Z Gusakov, L A Esipov, M A Irzak, M Yu Kantor, D V Kouprienko, S I Lashkul, S Leerink, P Niskala2016年Plasma Physics and Controlled FusionIF 2.2出版社

The poloidal dependence of the drift-wave turbulence characteristics is investigated at the FT-2 tokamak by radial correlation Doppler reflectometry (RCDR) technique and using the full distribution function global gyrokinetic modelling by ELMFIRE code. The poloidal variation of the turbulence radial correlation length from 0.2–0.55 cm is demonstrated both by measurement and computation. The turbulence correlation length rapidly decreases from the top of the poloidal cross-section to the high field side and then steadily grows in the poloidal direction. A well-pronounced excess of the turbulence radial correlation length in deuterium over its value in hydrogen discharges is demonstrated.

日本語訳

ポロイダル方向の乱流特性の依存性は、FT-2トカマクにおいて、径方向相関ドップラー反射計(RCDR)技術と、ELMFIREコードによる全分布関数グローバルジャイロ運動論的モデリングを用いて調査される。乱流の径方向相関長のポロイダル方向の変化は、0.2〜0.55 cmの範囲で、測定と計算の両方によって実証される。乱流相関長は、ポロイダル断面の頂部から高磁場側に向かって急速に減少し、その後ポロイダル方向に沿って着実に増大する。重水素放電における乱流の径方向相関長が、水素放電における値よりも顕著に大きいことが明確に示される。

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GyrokineticReflectometryDoppler reflectometry
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