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DOE OSTI · 2446677

A new operator-split Compton scattering method

McGraw, Carolyn Nicole·Till, Andrew·Warsa, James S.
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Abstract

In high-energy-density physics, when the temperatures are high (keV-range) and/or the densities are low, Compton scattering becomes the main energy transfer mechanism between the radiation field and the material. The interaction between the radiation field and the material is non-linear in the radiation field – due to induced processes caused by photons being bosons – and in the material temperature. Many existing codes use a Compton-Fokker-Planck (CFP) approximation – which is inaccurate for high photon energies or material temperatures – or use linear approximations within a time-step. Here, we have implemented a new Compton-heating method called OS-FBC (Operator-Split Full-Boltzmann Compton) that solves the full, nonlinear Compton-heating system with few approximations.

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97 MATHEMATICS AND COMPUTINGBoltzmannComptonOperator-split

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BibTeXRIS

McGraw, Carolyn Nicole, Till, Andrew, Warsa, James S.. 2023-02-03. A new operator-split Compton scattering method. https://doi.org/10.1016/j.jcp.2023.111980

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