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Parametrization of Mean Radiative Properties of Optically Thin Steady-State Plasmas and Applications

Published online by Cambridge University Press:  03 June 2015

R. Rodriguez ,
G. Espinosa ,
J. M. Gil ,
J. G. Rubiano ,
M. A. Mendoza ,
P. Martel  and
E. Minguez
R. Rodriguez*
Affiliation:
Departmento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017, Spain Instituto de Fusion Nuclear, Universidad Politecnica de Madrid, 28006, Madrid, Spain
G. Espinosa
Affiliation:
Departmento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017, Spain
J. M. Gil
Affiliation:
Instituto de Fusion Nuclear, Universidad Politecnica de Madrid, 28006, Madrid, Spain
J. G. Rubiano
Affiliation:
Departmento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017, Spain Instituto de Fusion Nuclear, Universidad Politecnica de Madrid, 28006, Madrid, Spain
M. A. Mendoza
Affiliation:
Departmento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017, Spain Instituto de Fusion Nuclear, Universidad Politecnica de Madrid, 28006, Madrid, Spain
P. Martel
Affiliation:
Departmento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017, Spain Instituto de Fusion Nuclear, Universidad Politecnica de Madrid, 28006, Madrid, Spain
E. Minguez
Affiliation:
Departmento de Fisica, Universidad de Las Palmas de Gran Canaria, 35017, Spain Instituto de Fusion Nuclear, Universidad Politecnica de Madrid, 28006, Madrid, Spain
*
*Corresponding author.Email:rafael.rodriguezperez@ulpgc.es
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Abstract

Plasma radiative properties play a pivotal role both in nuclear fusion and astrophysics. They are essential to analyze and explain experiments or observations and also in radiative-hydrodynamics simulations. Their computation requires the generation of large atomic databases and the calculation, by solving a set of rate equations, of a huge number of atomic level populations in wide ranges of plasma conditions. These facts make that, for example, radiative-hydrodynamics in-line simulations be almost infeasible. This has lead to develop analytical expressions based on the parametrization of radiative properties. However, most of them are accurate only for coronal or local thermodynamic equilibrium. In this work we present a code for the parametrization of plasma radiative properties of mono-component plasmas, in terms of plasma density and temperature, such as radiative power loss, the Planck and Rosseland mean opacities and the average ionization, which is valid for steady-state optically thin plasmas in wide ranges of plasma densities and temperatures. Furthermore, we also present some applications of this parametrization such as the analysis of the optical depth and radiative character of plasmas, the use to perform diagnostics of the electron temperature, the determination of mean radiative properties for multicomponent plasmas and the analysis of radiative cooling instabilities in some kind of experiments on high-energy density laboratory astrophysics. Finally, to ease the use of the code for the parametrization, this one has been integrated in a user interface and brief comments about it are presented.

Keywords

52.25Dg52.25OsParametrization of plasma radiative properties and applicationssteady-state collisional-radiative modeloptically thin mono- and multi-component plasmas
Type
Research Article
Information
Communications in Computational Physics , Volume 16 , Issue 3 , September 2014 , pp. 612 - 631
Copyright
Copyright © Global Science Press Limited 2014

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