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Turbulence correlation properties measured with ultrafast sweeping reflectometry on Tore Supra

G Hornung, F Clairet, G L Falchetto, R Sabot, H Arnichand, L Vermare2013年Plasma Physics and Controlled FusionIF 2.2出版社

The ultrafast sweep reflectometry technique is used to investigate plasma turbulence on Tore Supra. Thanks to the X-mode polarization, the plasma density and fluctuations over the whole tokamak radius, from the far scrape-off layer (SOL) to the core can be measured. Cross-correlation analysis is applied to all the signal components to estimate the fluctuation correlation length radial profile. The correlation length decreases from the plasma centre to the last closed flux surface and grows again into the far SOL.

日本語訳

超高速スイープ反射測定法を用いて、Tore Supraにおけるプラズマ乱流を調査する。Xモード偏波により、トカマク半径全体にわたるプラズマ密度と揺動を、遠スクレープオフ層(SOL)からコアまで測定することができる。全信号成分に相互相関解析を適用し、揺動の相関長の動径分布を推定する。相関長は、プラズマ中心から最終閉鎖磁気面に向かって減少し、遠SOL領域では再び増大する。

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