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Numerical scalings of the decay lengths in the scrape-off layer

F Militello, V Naulin, A H Nielsen2013年Plasma Physics and Controlled FusionIF 2.2出版社

Numerical simulations of L-mode turbulence in the scrape-off layer (SOL) are used to construct power scaling laws for the characteristic decay lengths of the temperature, density and heat flux at the outer mid-plane. Most of the results obtained are in qualitative agreement with the experimental observations despite the known limitation of the model. Quantitative agreement is also obtained for some exponents. In particular, an almost linear inverse dependence of the heat flux decay length with the plasma current is recovered. The relative simplicity of the theoretical model used allows one to gain insight into the mechanisms determining the width of the SOL.

日本語訳

Lモード乱流の数値シミュレーションをスクレイプオフ層(SOL)において用いて、外側中平面における温度、密度、および熱流束の特性減衰長に対するパワースケーリング則を構築する。得られた結果の大部分は、モデルの既知の限界にもかかわらず、実験観測と定性的に一致している。いくつかの指数については定量的な一致も得られている。特に、熱流束の減衰長とプラズマ電流との間には、ほぼ線形の逆依存性が再現される。使用した理論モデルの比較的単純さにより、SOLの幅を決定するメカニズムへの洞察が可能となる。

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Scrape-off layer
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