Three-dimensional reconstruction of laser-direct-drive inertial confinement fusion hot-spot plasma from x-ray diagnostics on the OMEGA laser facility (invited).

Autor:	Churnetski K; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA., Woo KM; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Theobald W; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA.; Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany., Betti R; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA., Ceurvorst L; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Forrest CJ; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Gopalaswamy V; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA., Heuer PV; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Ivancic ST; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Knauer JP; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Lees A; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Michalko M; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Rosenberg MJ; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Shah RC; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Stoeckl C; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Thomas CA; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA., Regan SP; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA.
Jazyk:	angličtina
Zdroj:	The Review of scientific instruments [Rev Sci Instrum] 2024 Oct 01; Vol. 95 (10).
DOI:	10.1063/5.0219526
Abstrakt:	A deep-learning convolutional neural network (CNN) is used to infer, from x-ray images along multiple lines of sight, the low-mode shape of the hot-spot emission of deuterium-tritium (DT) laser-direct-drive cryogenic implosions on OMEGA. The motivation of this approach is to develop a physics-informed 3-D reconstruction technique that can be performed within minutes to facilitate the use of the results to inform changes to the initial target and laser conditions for the subsequent implosion. The CNN is trained on a 3D radiation-hydrodynamic simulation database to relate 2D x-ray images to 3D emissivity at stagnation. The CNN accounts for the lack of an absolute spatial reference and the different bands of photon energies in the x-ray images. While previous work [O. M. Mannion et al., Phys. Plasmas 28, 042701 (2021) and A. Lees et al., Phys. Rev. Lett. 127, 105001 (2021)] studied the effect of mode-1 asymmetries on implosion performance using nuclear diagnostics, this work focuses on the effect of mode 2 inferred from x-ray diagnostics on implosion performance. A current analysis of 19 DT cryogenic implosions indicates there is an upper limit of ∼20% reduction in the neutron yield caused by an ℓ = 2 amplitude for ℓ2/ℓ0 ≤ 0.32. These conclusions are supported by 2D simulations. (© 2024 Author(s). Published under an exclusive license by AIP Publishing.)
Databáze:	MEDLINE
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