Study of Ion-Temperature and Intrinsic Rotation-Velocity Profiles on the Alcator C-Mod Tokamak

Measurements of radial profiles (r/a=0-0.75) of ion temperature (Ti) and toroidal rotation velocity (v$\phi )$ are made on C-Mod with a spatially resolving x-ray crystal spectrometer ($\sim $1 cm resolution) at 20 ms intervals via Doppler broadening and shifting of He-like and H-like Ar lines. Reversals of the rotation direction during transitions to H-mode, during formation of internal transport barriers, and during LHCD injection provide information on intrinsic rotation mechanisms. The data analysis techniques, Ti and v$\phi $ profile results, analysis of background resulting from fusion neutrons, and predictions of performance on the international tokamak ITER and other tokamaks will be presented.