2022-05-17 スイス連邦工科大学ローザンヌ校(EPFL)
＜関連情報＞
- https://actu.epfl.ch/news/a-new-law-unchains-fusion-energy/
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.128.185003
エッジ乱流輸送に基づくトカマクにおける第一原理密度限界スケーリングとITERへのインプリケーション First-Principles Density Limit Scaling in Tokamaks Based on Edge Turbulent Transport and Implications for ITER
M. Giacomin, A. Pau, P. Ricci, O. Sauter, T. Eich, the ASDEX Upgrade team, JET Contributors, and the TCV team
Physical Review Letters Published:6 May 2022
DOI:https://doi.org/10.1103/PhysRevLett.128.185003
ABSTRACT
A first-principles scaling law, based on turbulent transport considerations, and a multimachine database of density limit discharges from the ASDEX Upgrade, JET, and TCV tokamaks, show that the increase of the boundary turbulent transport with the plasma collisionality sets the maximum density achievable in tokamaks. This scaling law shows a strong dependence on the heating power, therefore predicting for ITER a significantly larger safety margin than the Greenwald empirical scaling [Greenwald et al., Nucl. Fusion, 28, 2199 (1988)] in case of unintentional high-to-low confinement transition.
