Predictive simulations of JET ELMy H-mode beta and collisionality scaling experiments

Predictive simulations have been performed on JET ELMy II-mode similarity s cans in collisionality and magnetic beta. The first-principles drift-wave m odel used in the simulations predicts global scalings in agreement with the experimental observations. The transport model combines ion temperature gr adient driven modes and collisionless trapped electron modes in a unified d escription where electromagnetic, finite beta, corrections also have been i ncluded. Simulated density and temperature profiles are well reproduced in the simulated discharges with global scalings in agreement with experimenta l observations. The collisionality scaling observed in the simulations ente rs the prediction through mismatches in similarity conditions where profile effects systematically changes the transport within the similarity scan. I n the beta scan the electromagnetic corrections are shown to have only weak impact on predicted density and temperature profiles.