ICRF Heating Scenarios for the Reduced Magnetic Field, Non-nuclear Phase of ITER
POSTER
Abstract
Radio frequency power in the ion cyclotron range of frequencies (ICRF) is one of three external heating sources planned for ITER. Previous full-wave simulations of high-power electromagnetic wave heating in ITER using the AORSA code [1] have concentrated on the burning plasma regime at full magnetic field and plasma current. Here, we consider instead the startup, non-nuclear phase of ITER. ASTRA modeled plasma profiles are assumed for hydrogen plasmas at 7.5 MA and 2.65 T with 3{\%} minority He$^{3}$ ions. The 2$^{nd}$ harmonic He$^{3}$ resonance occurs near the magnetic axis, while the fundamental H resonance occurs on the inboard edge. Three cases represent a good range of conditions to study the application of ICRF: 1) L-mode conditions before ICRF is applied and well away from the H-mode threshold, 2) L-mode conditions with ICRF approaching the H-mode threshold, and 3) fully developed H-mode with all power available.
*This research used resources of the National Center for Computational Sciences at Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.