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Localization of MHD and fast particle modes using reflectometry in ASDEX Upgrade

S da Graça, G D Conway, P Lauber, M Maraschek, D Borba, S Günter, L Cupido, K Sassenberg, F Serra, M E Manso2007年Plasma Physics and Controlled FusionIF 2.2出版社

The radial structure of toroidal Alfvén eigenmodes (TAEs) is of great importance for comparison with theoretical predictions. A dual-channel fast frequency hopping millimeter-wave reflectometer installed on the ASDEX Upgrade tokamak is capable of measuring density fluctuations from the plasma edge to core, allowing the radial eigenfunction of n = 4 TAE and edge MHD modes to be obtained using phase perturbation and coherence data analysis techniques. The two techniques reveal similar results, and in particular the radial structure of the n = 4 TAE is found to be in good agreement with numerical predictions from linear gyrokinetic simulations. The first results of the radial localization of Alfvén cascades are also presented.

日本語訳

トロイダル・アルヴェン固有モード(TAE)の径方向構造は、理論的予測との比較において極めて重要である。ASDEX Upgradeトカマクに設置された二チャンネル高速周波数ホッピングミリ波反射計は、プラズマ中心部から周辺部までの密度揺動を測定することができ、位相摂動法とコヒーレンス解析法を用いることで、n = 4 TAEおよび周辺MHDモードの径方向固有関数を取得することが可能である。これら二つの手法は同様の結果を示し、特にn = 4 TAEの径方向構造は、線形ジャイロ運動論的シミュレーションによる数値予測と良好な一致を示すことが確認された。さらに、アルヴェンカスケードの径方向局在に関する初期結果も提示される。

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asdex-upgrade高精度(タイトル一致)

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Fusion Advanced Studies TorusMagnetohydrodynamicsASDEXASDEX UpgradeReflectometry
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