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A first-principles predictive model of the pedestal height and width: development, testing and ITER optimization with the EPED model

P.B. Snyder, R.J. Groebner, J.W. Hughes, T.H. Osborne, M. Beurskens, A.W. Leonard, H.R. Wilson, X.Q. Xu2011年被引用 347Nuclear FusionIF 3出版社

We develop and test a model, EPED1.6, for the H-mode pedestal height and width based upon two fundamental and calculable constraints: (1) onset of non-local peeling–ballooning modes at low to intermediate mode number, (2) onset of nearly local kinetic ballooning modes at high mode number. Calculation of these two constraints allows a unique, predictive determination of both pedestal height and width. The present version of the model is first principles, in that no parameters are fit to observations, and includes important non-ideal effects. Extensive successful comparisons with existing experiments on multiple tokamaks, including experiments where predictions were made prior to the experiment, are presented, and predictions for ITER are discussed.

日本語訳

我々は、Hモードペデスタルの高さと幅に関するモデルEPED1.6を構築し、検証する。このモデルは、2つの基本的かつ計算可能な制約に基づいている:(1) 低~中モード数の非局所的ピーリング・バルーニングモードの onset、(2) 高モード数のほぼ局所的な運動論的バルーニングモードの onset。これら2つの制約の計算により、ペデスタルの高さと幅の両方を一意的に予測することが可能となる。本モデルの現行版は第一原理に基づいており、観測データに適合させるパラメータはなく、重要な非理想効果を考慮している。複数のトカマクにおける既存の実験との広範な比較において良好な一致が得られており、実験前に予測が行われたケースも含まれる。さらに、ITERに対する予測についても議論する。

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