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Ray-based cross-beam energy transfer modeling for broadband lasers

R. K. Follett, A. Colaitis, A. G. Seaton, H. Wen, D. Turnbull, D. H. Froula, J. P. Palastro

PHYSICS OF PLASMAS(2023)

Cited 2|Views40
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Abstract
Broadband lasers have the potential to mitigate cross-beam energy transfer (CBET) in direct-drive inertial confinement fusion (ICF) experiments. A quantitative assessment of the bandwidth required for CBET mitigation necessitates the development of broadband ray-based CBET models that can be implemented in the radiation-hydrodynamic codes that are used to design ICF experiments. Two different approaches to broadband ray-based CBET modeling (discrete and fixed spectrum) are developed and compared to wave-based calculations. Both approaches give good agreement with wave-based calculations in ICF-relevant configurations. Full-scale 3D calculations show that the bandwidth required for adequate CBET mitigation increases with increasing scale and drive intensity.
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Key words
lasers,energy transfer,ray-based,cross-beam
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