Diagnosing Inertial Confinement Fusion Implosions Using the D3He Spectrum Line Width at OMEGA and the NIF

Wedge Range Filter (WRF) spectrometers are used to diagnose implosions containing D and ³He gas through measurements of the proton spectrum [D+³He → p (14.7 MeV) + ⁴He (3.6 MeV)]. The total line width is due to the thermal Doppler broadening, instrumental broadening, and several other effects. The significances of these sources of broadening are calculated using a Monte Carlo code. Using this code we constrain the ion temperature in OMEGA exploding pusher shots. Alternatively, we constrain the amplitude of high-mode asymmetries in a NIF implosion from the previous campaign (N091123), and will apply these models to D³He exploding pushers on the NIF during the Magnetic Recoil Spectrometer (MRS) calibration.