Reconstructing 3-D Asymmetries in Laser-Direct-Drive Implosions on OMEGA

Dataset · Mon Aug 16 00:00:00 EDT 2021

DOI:https://doi.org/10.7910/DVN/P05LCM· OSTI ID:1887791

Mannion, O. M. ^[1]; Woo, K. M.; Crilly, A. J.; Forrest, C. J.; Frenje, J. A.; Glebov, V. Yu.; Gatu Johnson, M.; Knauer, J. P.; Mohamed, Z. L.; Romanofsky, M. H.; Stoeckl, C.; Theobald, W.; Regan, S. P.

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1. OSTI

Three-dimensional reconstruction algorithms have been developed which determine the hot-spot velocity, hot-spot apparent ion temperature distribution, and fuel areal-density distribution present in laser-direct- drive inertial confinement fusion implosions on the OMEGA laser. These reconstructions rely on multiple independent measurements of the neutron energy spectrum emitted from the fusing plasma. Measurements of the neutron energy spectrum on OMEGA are made using a suite of quasi-orthogonal neutron time-of-flight detectors and a magnetic recoil spectrometer. These spectrometers are positioned strategically around the OMEGA target chamber to provide unique 3-D measurements of the conditions of the fusing hot spot and compressed fuel near peak compression. The uncertainties involved in these 3-D reconstructions are discussed and are used to identify a new nTOF diagnostic line of sight which when built will reduce the uncertainty in the hot-spot apparent ion temperature distribution from 700 to <400 eV.

• Research Organization: Univ. of Rochester, NY (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: NA0003856
• OSTI ID: 1887791
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY