FIDA/FIHA signals from mixed deuterium/hydrogen beams in mixed species plasmas.

Fast-ion D-alpha and H-alpha spectra are measured during experiments that assess the isotope dependence of fast-ion driven instabilities in both the Alfven and ion-cyclotron frequency bands. Hydrogen and deuterium neutral beams are injected into both hydrogen and deuterium thermal plasmas. With hydrogen injection, measured Doppler shifts are similar to deuterium injection (for a typical case). To model these plasmas, FIDASIM is upgraded to treat mixed thermal species. TRANSP calculations that utilize the measured species mix predict the fast-ion distribution. The spectra predicted by TRANSP/FIDASIM are compared with the data for cases with and without fast-ion driven instabilities.