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Scaling of the energy confinement time with $$beta$$ and collisionality approaching ITER conditions

ITER条件に向けてのベータと衝突度に対するエネルギー閉じ込め時間比例則

Cordey, J. G.*; Thomsen, K.*; Chudnovskiy, A.*; Kardaun, O. J. W. F.*; 滝塚 知典; Snipes, J. A.*; Greenwald, M.*; Sugiyama, L.*; Ryter, F.*; Kus, A.*; Stober, J.*; DeBoo, J. C.*; Petty, C. C.*; Bracco, G.*; Romanelli, M.*; Cui, Z.*; Liu, Y.*; McDonald, D. C.*; Meakins, A.*; 三浦 幸俊; 篠原 孝司; 都筑 和泰; 鎌田 裕; 浦野 創; Valovic, M.*; Akers, R.*; Brickley, C.*; Sykes, A.*; Walsh, M. J.*; Kaye, S. M.*; Bush, C.*; Hogewei, D.*; Martin, Y.*; Cote, A.*; Pacher, G.*; Ongena, J.*; Imbeaux, F.*; Hoang, G. T.*; Lebedev, S.*; Leonov, V.*

Cordey, J. G.*; Thomsen, K.*; Chudnovskiy, A.*; Kardaun, O. J. W. F.*; Takizuka, Tomonori; Snipes, J. A.*; Greenwald, M.*; Sugiyama, L.*; Ryter, F.*; Kus, A.*; Stober, J.*; DeBoo, J. C.*; Petty, C. C.*; Bracco, G.*; Romanelli, M.*; Cui, Z.*; Liu, Y.*; McDonald, D. C.*; Meakins, A.*; Miura, Yukitoshi; Shinohara, Koji; Tsuzuki, Kazuhiro; Kamada, Yutaka; Urano, Hajime; Valovic, M.*; Akers, R.*; Brickley, C.*; Sykes, A.*; Walsh, M. J.*; Kaye, S. M.*; Bush, C.*; Hogewei, D.*; Martin, Y.*; Cote, A.*; Pacher, G.*; Ongena, J.*; Imbeaux, F.*; Hoang, G. T.*; Lebedev, S.*; Leonov, V.*

ELMyHモードデータベースの最新版の状況を再検査した。一般最小2乗回帰法における幾つかの変数について偏りがあることが確認された。これらの欠点に注意して、3種の解析手法、(a)主要素回帰法,(b)変数内誤差手法、及び(c)偏りの小さい少数変数による解析、を取り入れた。標準的な工学的変数で表した比例則とともに、無次元物理変数を用いた比例則を導出した。新比例則は従来の比例則に比べて、ITERの標準的ベータ運転に関して同様な性能を予測するが、より高いベータの運転では性能が高くなると予測する。

The condition of the latest version of the ELMy H-mode database has been re-examined. It is shown that there is bias in the ordinary least squares regression for some of the variables. To address these shortcomings three different techniques are employed: (a)principal component regression, (b)an error in variables technique and (c)the selection of a better conditioned dataset with fewer variables. Scalings in terms of the dimensionless physics valiables, as well as the standard set of engineering variables, are derived. The new scalings give a very similar performance for existing scalings for ITER at the standard beta, but a much improvement performance at higher beta.

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パーセンタイル:14.26

分野:Physics, Fluids & Plasmas

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