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DOE OSTI · 2567964

Modeling cross-beam energy transfer with sector ray tracing

Follett, R. K. [University of Rochester, NY (United States)] (ORCID:000000021632606X)·Igumenshchev, I. V. [University of Rochester, NY (United States)] (ORCID:0000000154958503)·Colaïtis, A. [University of Rochester, NY (United States)] (ORCID:0000000349131653)·Palastro, J. P. [University of Rochester, NY (United States)] (ORCID:0000000267211924)·Froula, D. H. [University of Rochester, NY (United States)] (ORCID:0000000169813956)·Turnbull, D. [University of Rochester, NY (United States)] (ORCID:0000000298871028)
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Abstract

Ray-based cross-beam energy transfer (CBET) models are an essential feature of the radiation-hydrodynamic codes used to simulate inertial confinement fusion implosions, but full 3D ray-based CBET calculations can have a prohibitively high computational cost. Sector ray tracing can be used to reduce the cost by orders of magnitude in cases where the coronal plasma and laser drive can be approximated as spherically symmetric. An extension of sector ray tracing (section ray tracing) can be used to relax the assumption of a spherically symmetric drive while still retaining most of the computational savings of a sector ray trace. We discuss the foundations of sector and section ray tracing and compare them to full ray tracing.

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70 PLASMA PHYSICS AND FUSION TECHNOLOGYBremsstrahlungCoordinate transformationsEnergy conservationHydrodynamic codesIteration methodPlasma confinementPlasma flows

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Follett, R. K. [University of Rochester, NY (United States)] (ORCID:000000021632606X), Igumenshchev, I. V. [University of Rochester, NY (United States)] (ORCID:0000000154958503), Colaïtis, A. [University of Rochester, NY (United States)] (ORCID:0000000349131653), Palastro, J. P. [University of Rochester, NY (United States)] (ORCID:0000000267211924), Froula, D. H. [University of Rochester, NY (United States)] (ORCID:0000000169813956), Turnbull, D. [University of Rochester, NY (United States)] (ORCID:0000000298871028). 2025-02-25. Modeling cross-beam energy transfer with sector ray tracing. https://doi.org/10.1063/5.0253858

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