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Modelling ohmic confinement experiments on the START tokamak

C M Roach1996年Plasma Physics and Controlled FusionIF 2.2出版社

Ohmic confinement data from the tight aspect ratio tokamak START have been compared with transport simulations carried out with the ASTRA code. Neoclassical expressions have been modified to describe tight aspect ratio configurations and the comparison between START data and models of anomalous transport has been made quantitative using the standard test from statistics. Four confinement models (T11 model, Rebut - Lallia - Watkins model, Lackner - Gottardi model and Taroni et al's Bohm model) have been compared with the START data. Three of the models are found to simulate START's electron temperature data moderately well, while Taroni et al's Bohm model overestimates electron temperatures in START by an order of magnitude. Thus, comparison with START data tends to discriminate against the validity of Bohm models at tight aspect ratio; Bohm models are pessimistic for ITER.

日本語訳

オーム加熱閉じ込めデータは、アスペクト比の小さなトカマクSTARTにおいて、ASTRAコードを用いた輸送シミュレーションと比較された。新古典論的な式は、アスペクト比の小さな配位を記述するように修正され、STARTデータと異常輸送モデルとの比較は、統計学における標準的な検定を用いて定量的に行われた。4つの閉じ込めモデル(T11モデル、Rebut-Lallia-Watkinsモデル、Lackner-Gottardiモデル、およびTaroniらのBohmモデル)がSTARTデータと比較された。その結果、3つのモデルはSTARTの電子温度データを概ね良好に再現することがわかった一方、TaroniらのBohmモデルはSTARTの電子温度を一桁程度上回る過大評価を示した。したがって、STARTデータとの比較は、アスペクト比が小さい場合のBohmモデルの妥当性に疑問を投げかけるものであり、BohmモデルはITERに対して悲観的な予測を与えることになる。

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iter中精度(概要文一致)

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Ohmic heating
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