Journal ArticleDOI
Comparing plasma population kinetics codes: Review of the NLTE-3 Kinetics Workshop
TLDR
It was found that good agreement between codes and with experiments is observed near closed shells, but significant differences exist otherwise, or when density effects are important, as well as plans for the next workshop and for a kinetics database.Abstract:
Comparison of plasma population kinetics codes, which has become an important tool for their testing and verification, was the subject of the third Non-LTE Code Comparison Workshop held at the National Institute of Standards and Technology in December 2003. The motivations for the workshop are presented here, together with its technical organization. The cases studied range from carbon to gold, and include both steady-state and time-dependent calculations. The set of results represents the current capabilities in kinetics modeling, and illustrates the effectiveness of this workshop approach to code comparisons. It was found that good agreement between codes and with experiments is observed near closed shells, but significant differences exist otherwise, or when density effects are important. On a more general level, we discuss how to meaningfully compare kinetics data. We conclude with plans for the next workshop and for a kinetics database.read more
Citations
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Journal ArticleDOI
Superconfiguration widths and their effects on atomic models
TL;DR: In this article, the statistical properties of superconfigurations and expressions for their approximate average energies and energy variances based on one-electron orbital energies were derived for screened hydrogenic and hybrid-structure atomic kinetics models.
Journal ArticleDOI
Testing the reliability of non-LTE spectroscopic models for complex ions
Stephanie Hansen,Gregory Armstrong,S. Bastiani-Ceccotti,C. Bowen,Hyun-Kyung Chung,James Colgan,F. de Dortan,Chris Fontes,F. Gilleron,Jean-Raphael Marques,Robin Piron,Olivier Peyrusse,M. Poirier,Yu. Ralchenko,Akira Sasaki,Evgeny Stambulchik,F. Thais +16 more
TL;DR: In this paper, the authors present the results of a code comparison in which a variety of models determined plasma temperatures and densities by finding the best fit to an experimental L-shell Kr spectrum from a well characterized, but not benchmarked, laser plasma.
Journal ArticleDOI
A comparison between detailed and configuration-averaged collisional-radiative codes applied to non-local thermal equilibrium plasma
TL;DR: In this paper, a collisional-radiative model describing nonlocalthermodynamic equilibrium plasmas is developed, based on the HULLAC suite for the transitions rates, in the zero-temperature radiation field hypothesis.
Journal ArticleDOI
Role of dielectronic recombination and autoionizing states in the dynamic equilibrium of non-LTE plasmas
TL;DR: In this article, the rates of resonant capture and autoionization are given for transitions between levels, between configurations, and between superconfigurations, and results of collisional-radiative calculations and comparisons between the effects of the different atomic processes are presented.
Journal ArticleDOI
Determination and analysis of plasma parameters for simulations of radiative blast waves launched in clusters of xenon and krypton
Rafael L. Rodríguez,Rafael L. Rodríguez,J.M. Gil,J.M. Gil,G. Espinosa,Ricardo Florido,Ricardo Florido,Jesús García Rubiano,Jesús García Rubiano,M.A. Mendoza,M.A. Mendoza,P. Martel,P. Martel,E. Mínguez,Dan Symes,Matthias Hohenberger,Roland Smith +16 more
TL;DR: In this article, several relevant parameters and properties for krypton and xenon plasmas are analyzed, such as, for example, the average ionization, the plasma thermodynamic regimes, the radiative power losses and the mean opacities.
References
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Journal ArticleDOI
Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to NI
TL;DR: In this article, the authors presented new and updated calculations of the ionization equilibrium for all the elements from H to Ni and collected for these elements all the data available in the literature for the ionisation and radiative plus dielectronic recombination rates.
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HULLAC, an integrated computer package for atomic processes in plasmas
TL;DR: H ULLAC as mentioned in this paper, an integrated code for calculating atomic structure and cross sections for collisional and radiative atomic processes, is based on relativistic quantum mechanical calculations including configuration interaction.
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Excitation equilibria in plasmas; a classification
TL;DR: In this article, the authors follow and continue the line of Bibermanl, Fujimoto, and Seaton by trying to find a classification in these results and find a (analytical) relation between the atomic state distribution function and the underlying plasma properties.
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Accelerated recombination due to resonant deexcitation of metastable states
Yu. Ralchenko,Yitzhak Maron +1 more
TL;DR: In this article, a fully time-dependent collisional-radiative (CR) model for stripped ions of carbon recombining in a cold dense plasma demonstrates an order of magnitude faster recombination of He-like ions.
Journal ArticleDOI
Computational Science Demands a New Paradigm
TL;DR: The field has reached a threshold at which better organization becomes crucial and new methods of verifying and validating complex codes are mandatory if computational science is to fulfill its promise for science and society.