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Investigation of fast ion pressure effects in ASDEX Upgrade by spectral MSE measurements

René Reimer, Andreas Dinklage, Robert Wolf, Mike Dunne, Benedikt Geiger, Jörg Hobirk, Matthias Reich, ASDEX Upgrade Team, Patrick J. Mc Carthy2017年被引用 2Nuclear FusionIF 3出版社

High precision measurements of fast ion effects on the magnetic equilibrium in the ASDEX Upgrade tokamak have been conducted in a high-power (10 MW) neutral-beam injection discharge. An improved analysis of the spectral motional Stark effect data based on forward-modeling, including the Zeeman effect, fine-structure and non-statistical sub-level distribution, revealed changes in the order of 1% in . The results were found to be consistent with results from the equilibrium solver CLISTE. The measurements allowed us to derive the fast ion pressure fraction to be and variations of the fast ion pressure are consistent with calculations of the transport code TRANSP. The results advance the understanding of fast ion confinement and magneto-hydrodynamic stability in the presence of fast ions.

日本語訳

高パワー(10 MW)中性粒子ビーム入射を用いたASDEX Upgradeトカマクにおける磁気平衡への高速イオン効果の高精度測定が実施された。前方モデリングに基づくモーションル・シュタルク効果スペクトルの改良解析により、ゼーマン効果、微細構造、および非統計的な副準位分布を考慮した結果、約1%のオーダーの変化が明らかになった。その結果は、平衡ソルバーCLISTEによる結果と一致することが確認された。測定により、高速イオン圧力分率を導出することが可能となり、高速イオン圧力の変動は輸送コードTRANSPによる計算と一致することが示された。これらの結果は、高速イオンの存在下における高速イオン閉じ込めと磁気流体力学的安定性の理解を深めるものである。

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asdex-upgrade高精度(タイトル一致)

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Fusion Advanced Studies TorusASDEXASDEX UpgradeEnergetic ion
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