Three-dimensional reconstruction of implosion stagnation in laser direct drive on OMEGA

Multidimensional effects on hot-spot formation must be considered to better understand the current limits on the performance of direct-drive inertial confinement fusion experiments on OMEGA with cryogenically layered solid deuterium–tritium targets. A comprehensive reconstruction effort has been established at the Laboratory for Laser Energetics to infer hot-spot and shell conditions at stagnation from a large collection of x-ray, neutron, and particle detectors along multiple lines of sight. Several time-gated and time-integrated x-ray imagers are being used to record the shape of the hot-spot plasma. A 3D hot-spot x-ray emission tomography technique has been developed to infer low-mode drive asymmetries from the hot-spot shape. A suite of neutron diagnostics is used to provide measurements of hot-spot flow velocity, ion temperature, and areal density. Here, the information obtained from the x-ray and neutron detectors will be combined into a coherent model of the shape of the hot spot and shell assembly.. Authors: Churnetski, K. [University of Rochester, NY (United States); Laboratory for Laser Energetics, University of Rochester] (ORCID:0000000333372647); Woo, K. M. [University of Rochester, NY (United States)] (ORCID:0000000211243871); Theobald, W. [University of Rochester, NY (United States)] (ORCID:0000000304149999); Stoeckl, C. [University of Rochester, NY (United States)] (ORCID:0000000153755800); Ceurvorst, L. [University of Rochester, NY (United States)] (ORCID:0000000242153326). DOE Contract: NA0004144; SC0022132; SC0024381. Subjects: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Direct drive; Inertial confinement fusion; Low-mode asymmetry; X-ray Imager; X-ray tomography