SUNY Geneseo Physics & Astronomy Colloquium
Thursdays, 4 p.m., in Newton 204. (There will be refreshments!)
Three-Dimensional Reconstruction Platform for Direct-Drive Inertial Confinement Fusion Implosions on OMEGA
by Kristen Churnetski
Laboratory for Laser Energetics at University of Rochester
Thursday Feb 29, 2024
4:00 pm, Newton 204
Abstract: To better understand what currently limits the performance of direct-drive inertial confinement fusion experiments on the OMEGA Laser System, multidimensional effects on the hot-spot formation need to be considered. A comprehensive 3-D reconstruction effort has been established at the Laboratory for Laser Energetics to infer the implosion conditions from a collection of x-ray and neutron detectors distributed around the target chamber. Several time-gated and time-integrated x-ray imagers record the shape of the hot-spot plasma to infer low-mode drive asymmetries using a 3-D hot-spot x-ray emission tomography technique. A suite of neutron diagnostics provides measurements of hot-spot flow velocity, ion-temperature variations, and areal-density variation. The information obtained from the x ray and neutron detectors will be combined into a coherent model of the hot-spot and shell assembly to determine the effects of low-mode perturbations on implosion performance. An upcoming experiment using this tomography technique where asymmetries will be imposed in the initial target configuration and mitigated using laser energy corrections will also be discussed.