Application of the three ion species ICRF scenario to ITER operations

Recent ICRF (ion cyclotron range of frequencies) heating experiments on C-Mod and JET confirm that using a third species as a second minority at fractions of less than a percent, eg D-($^3$He)-H, can increase heating efficiency and generate very energetic ions on the order of an MeV [Y. Kazakov, invited talk this meeting.] Together with 9Be-(4He)-H scenario, three-ion ICRF schemes are applicable to the pre-activation phase of ITER using trace concentrations of 3He or 4He ($\sim$0.1%) as a source of energetic ions for confinement studies of pseudo-alphas. During D-T operations, this scheme may be employed to heat intrinsic beryllium impurities for efficient bulk heating. We will briefly review experimental findings on Alcator C-Mod and JET with validated model comparison. Modeling using full wave solvers and Fokker-Planck will be used to determine heating efficiencies ICRF generated ion tail temperatures for ITER.