The bands method for tabulating NLTE material properties

The bands method for tabulating NLTE material properties

The use of Non-Local Thermal Equilibrium (NLTE) material properties within radiation-hydrodynamic simulations remains a major challenge. The plasma radiative and EOS properties in NLTE can depend on the detailed local radiation field and electron energy distribution. Fully characterizing each of the...

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Veröffentlicht in:High energy density physics 2022-06, Vol.43, p.100998, Article 100998
Hauptverfasser: Frank, Yechiel, Scott, Howard A.
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Sprache:eng
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Non-LTE
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Radiative properties
Tabulation
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container_title High energy density physics
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Scott, Howard A.
description The use of Non-Local Thermal Equilibrium (NLTE) material properties within radiation-hydrodynamic simulations remains a major challenge. The plasma radiative and EOS properties in NLTE can depend on the detailed local radiation field and electron energy distribution. Fully characterizing each of these quantities may require 10’s to 100’s of parameters, making tabulation effectively impossible and requiring expensive calculations for each set of conditions within the simulation. In this work we present a new method that characterizes the local radiation field with a limited number of parameters. This permits pre-calculation and tabulation of the material properties, allowing codes to perform NLTE radiation-hydrodynamic simulations which would otherwise be computationally prohibitive.
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subjects Non-LTE
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Radiative properties
Tabulation
title The bands method for tabulating NLTE material properties
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