Using secondary nuclear products for inferring the fuel areal density, convergence, and electron temperatures of deuterium filled implosions on the NIF

In deuterium-filled inertial confinement fusion implosions, 0.82 MeV $^{\mathrm{3}}$He and 1.01 MeV T born from the primary DD reaction branches can undergo fusion reactions with the thermal deuterium plasma to create secondary D$^{\mathrm{3}}$He protons and DT neutrons respectively. In regimes of moderate fuel areal density ($\rho $R $\sim $ 5 - 100 mg/cm$^{\mathrm{2}})$ the ratio of both of these secondary yields to the primary yield can be used to infer the fuel $\rho $R, convergence, and an electron temperature ($T_{e})$ \quad simultaneously. This technique has been used on a myriad of deuterium filled implosion experiments on the NIF using the nuclear time of flight (NTOF) diagnostics to measure the secondary DT neutrons and CR-39 based wedge range filters (WRFs) to measure the secondary D$^{\mathrm{3}}$He protons. Additionally, a comparative study is conducted between the nuclear inferred convergence and x-ray inferred convergence obtained on these experiments.