RANDOM COEFFICIENT H-MODE CONFINEMENT SCALINGS

The random coefficient two-stage regression algorithm with the collisional Maxwell-Vlasov constraint is applied to the ITER H-mode confinement database. The data violate the collisional Maxwell-Vlasov constraint at the 10-30% significance level, probably owing to radiation losses. The dimensionally constrained scaling, tau(E) = 0.07192M1/2 (R/a)-0.221 R1.568 kappa-0.300 I(p)0.904 B(t)0.201 n0.106BAR P-0.493, is similar to ITER89P with a slightly stronger size dependence.