Fast ion charge exchange measurements during minority heating in Alcator C-Mod

Ion cyclotron range of frequencies (ICRF) power is the primary auxiliary heating method in Alcator C-Mod and we utilize D(H) and D($^{3}$He) minority heating scenarios (minority in parentheses). Measuring the energetic ion distribution provides a direct means to validate simulations used to calculate ICRF power deposition. The fast and thermal minority ion distributions are measured by observing line emission using active charge exchange where the H I (656.3 nm) or He II (468.6 nm) lines are monitored for the H$^{ }$or $^{3}$He minority heating scenarios, respectively. The $^{3}$He measurements have developed more quickly than H measurement due to improved S/N (ambient D emission interferes with H line). Initial results from energetic ion detection, minority ion density, temperature, and velocity profiles will be reported for D($^{3}$He) discharges. Diagnostic design for H minority measurements will also be presented.