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DOE OSTI · 2504601

Automated and highly parallelized Bayesian optimization scheme for direct drive fusion experiments on OMEGA

Gopalaswamy, V. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)] (ORCID:0000000280139314)·Lees, A. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)] (ORCID:0000000345734035)·Ejaz, R. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)]·Thomas, C. A. [Laboratory for Laser Energetics, Rochester, NY (United States)] (ORCID:0000000231312491)·Collins, T. J. B. [Laboratory for Laser Energetics, Rochester, NY (United States)] (ORCID:0000000226142459)·Anderson, K. S. [Laboratory for Laser Energetics, Rochester, NY (United States)] (ORCID:0000000292484545)·Ebmeyer, W. [Laboratory for Laser Energetics, Rochester, NY (United States)]·Betti, R. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)] (ORCID:0000000187420304)
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Abstract

Finding the optimal implosion design on existing experimental facilities for inertial confinement fusion requires an exhaustive search of the vast design parameter space. This is infeasible both with experiments and with simulations. Consequently, a large fraction of the experimentally realizable design space remains unexplored, and new design schemes are challenging to optimize in a reasonable time frame. On the OMEGA laser facility, predictive machine learning models have been developed to accurately forecast the result of an experiment using only inexpensive simulations and the large dataset of prior experimental data. However, the full design space remains vast enough to be unassailable with simple optimization techniques. Here we develop an automated and optimally parallel Bayesian optimization algorithm that can entirely optimize the target and pulse shape of a direct-drive ICF implosion under a given design paradigm. We use this algorithm to find a markedly improved design for the performance implosions on OMEGA that is predicted to hydroequivalently scale to ignition at 2.15 MJ.

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Gopalaswamy, V. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)] (ORCID:0000000280139314), Lees, A. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)] (ORCID:0000000345734035), Ejaz, R. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)], Thomas, C. A. [Laboratory for Laser Energetics, Rochester, NY (United States)] (ORCID:0000000231312491), Collins, T. J. B. [Laboratory for Laser Energetics, Rochester, NY (United States)] (ORCID:0000000226142459), Anderson, K. S. [Laboratory for Laser Energetics, Rochester, NY (United States)] (ORCID:0000000292484545), Ebmeyer, W. [Laboratory for Laser Energetics, Rochester, NY (United States)], Betti, R. [Laboratory for Laser Energetics, Rochester, NY (United States); University of Rochester, NY (United States)] (ORCID:0000000187420304). 2025-01-03. Automated and highly parallelized Bayesian optimization scheme for direct drive fusion experiments on OMEGA. https://doi.org/10.1103/physrevresearch.7.013009

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