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Real-time determination of magnetic island location for neoclassical tearing mode control in DIII-D

Y S Park, A S Welander2006年Plasma Physics and Controlled FusionIF 2.2出版社

Accurate measurement of island location is crucial for efficient suppression of the neoclassical tearing mode by electron cyclotron current drive (ECCD). In the control system on DIII-D the contour of the resonant q-surface is measured in real time based on real-time magnetohydrodynamic reconstructions, EFITs, that include motional Stark effect measurements of pitch angle in the analysis. A new method for determination of the radial position of the q-surface using a 40 channel electron cyclotron emission radiometer has been developed. This method analyses localized temperature fluctuations caused by motion of the island and can be used by the plasma control system as a complementary measurement of the radial position of the q-surface contour for faster and more accurate alignment of the ECCD.

日本語訳

磁気島位置の正確な測定は、新古典テアリングモードの電子サイクロトロン電流駆動(ECCD)による効率的な抑制にとって極めて重要である。DIII-Dの制御システムでは、共鳴q面の輪郭が、ピッチ角のモーションラーク効果測定を含むリアルタイム磁気流体再構成(EFIT)に基づいてリアルタイムで測定されている。40チャンネルの電子サイクロトロン放射計を用いてq面の半径方向位置を決定する新しい方法が開発された。この方法は、磁気島の運動によって引き起こされる局所的な温度変動を解析するものであり、ECCDのより迅速かつ正確な位置合わせのためのq面輪郭の半径方向位置の補完的測定として、プラズマ制御システムにおいて使用することができる。

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diii-d高精度(タイトル一致)

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DIII-DTearing modeMagnetic islandsNeoclassical tearing mode
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