Gamma Reaction History on Sandia's Z Machine*

Reaction History diagnostics are being fielded on Sandia's Z machine to demonstrate the ability to measure gamma ray reaction history. Tritium introduction into the Z experiments provides necessary gammas for analysis of the reaction history. We will outline the proposed experiments which include mixtures of deuterium (99{\%}) and tritium (1{\%}) as well as deuterium (50{\%}) and helium 3 (50{\%}) with the ultimate goal of diagnosing the evolution of the fusion plasma on Z. D$^{\mathrm{3}}$He also has a steep dependence on ion temperature, making the reactivity ratio between DT and D$^{\mathrm{3}}$He a sensitive ion temperature indicator. D$^{\mathrm{3}}$He is also highly sensitive to non-thermal beam reactions and can provide an indication of the degree of thermalization of the fusion plasmas.