H-mode profile parametrization for extrapolation and control

A steady-state ELMy H-mode profile data set of 68 DIII-D discharges and 74 JET discharges is fitted with an error of 7-8%. The advantages of a parametrization of the plasma profiles in terms of a semi-parametric representation, T(ρ, Ip, n-bar, Bt, PL, R), are described. The shape of the temperature profile depends almost exclusively upon the size, R and q95, with a secondary dependence on the heating power. The density profile depends primarily upon q95 with a secondary dependence on n-bar. The line-average temperature T-bare scales as n-bar -0.31 instead of T-bar∼''n-bar''-1.0. The predicted ITER temperature is T-bar = 17.1 keV. (Author)