Reconstructing 3D asymmetries in laser-direct-drive implosions on OMEGA

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

doi:10.1063/5.0043514

Reconstructing 3D asymmetries in laser-direct-drive implosions on OMEGA

Journal Article · Thu Mar 11 00:00:00 EST 2021 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0043514· OSTI ID:1771146

^[1]; ^[2]; Crilly, A. J. ^[3]; Forrest, C. J. ^[2]; ^[4]; ^[4]; ^[2]; Knauer, J. P. ^[2]; ^[2]; Romanofsky, M. H. ^[2]; ^[2]; Theobald, W. ^[2]; Regan, S. P. ^[2]

Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Laboratory for Laser Energetics, University of Rochester
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Imperial College, London (United Kingdom). Blackett Lab.
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

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 con finement 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. Here, 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 0.7 to < 0.4 keV.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003856

OSTI ID:: 1771146

Alternate ID(s):: OSTI ID: 1770474

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 92; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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