A gyrokinetic threshold model for pedestal width–height scaling prediction is applied to multiple devices. A shaping and aspect ratio scan is performed on National Spherical Torus Experiment (NSTX) equilibria, finding for the wide-pedestal branch with pedestal width , aspect ratio A, elongation κ, triangularity δ, and normalized pedestal height . The width–transport scaling is found to vary significantly if the pedestal height is varied either with a fixed density or fixed temperature, showing how fueling and heating sources affect the pedestal density and temperature profiles for the kinetic-ballooning-mode (KBM) limited profiles. For an NSTX equilibrium, at fixed density, the wide branch is and at fixed temperature , where and are turbulent electron heat and particle fluxes and for an electron temperature and density . Pedestals close to the KBM limit are shown to have modified turbulent transport coefficients compared to the strongly driven KBMs. The role of flow shear is studied as a width–height scaling constraint and pedestal saturation mechanism for a standard and lithiated wide pedestal discharge. Finally, the stability, transport, and flow shear constraints are combined and examined for an NSTX experiment.
この論文は、ジャイロ運動論的しきい値モデルを使ってペデスタル幅-高さのスケーリングを予測し、複数のデバイスに適用しています。形状とアスペクト比のスキャンを行い、ペデスタル幅、アスペクト比、縦長さ、三角形度との関係を明らかにしています。また、加熱源や燃料供給がペデスタルの密度や温度プロファイルに大きな影響を与えることを示しています。