Abstract
Collisional-radiative atomic models are widely used to help diagnose experimental plasma conditions through fitting and interpreting measured spectra. Here we 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. While variations in diagnostic strategies and qualities of fit were significant, the results generally confirmed the typically quoted uncertainties for such diagnostics of ±20% in electron temperature and factors of about two in density. The comparison also highlighted some model features important for spectroscopic diagnostics: fine structure was required to match line positions and relative intensities within each charge state and for density diagnostics based on emission from metastable states; an extensive configuration set was required to fit the wings of satellite features and to reliably diagnose the temperature through the inferred charge state distribution; and the inclusion of self-consistent opacity effects was an important factor in the quality of the fit.
Original language | English |
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Pages (from-to) | 523-527 |
Number of pages | 5 |
Journal | High Energy Density Physics |
Volume | 9 |
Issue number | 3 |
DOIs | |
Publication status | Published - Sep 2013 |
Externally published | Yes |
Keywords
- Atomic kinetics
- L-shell
- Plasma diagnostics
- X-ray spectroscopy
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Radiation