EUV Spectra and Line Ratios of Multiply Ionized Calcium and Argon Atoms in a Laboratory Plasma

The utility of Ca in the EUV spectral range of astrophysical observations is limited by a fragmentary and incomplete record of laboratory data. In order to obtain a more comprehensive survey of the Ca line emission in the EUV, we have used a tokamak plasma discharge in hydrogen carrying some Ar and...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 865; no. 2; pp. 148 - 162
Main Authors Träbert, Elmar, Beiersdorfer, Peter, Lepson, Jaan K., Reinke, Matthew L., Rice, John E.
Format Journal Article
LanguageEnglish
Published Philadelphia The American Astronomical Society 01.10.2018
IOP Publishing
Institute of Physics (IOP)
Subjects
Argon
ASTRONOMY AND ASTROPHYSICS
Astrophysics
atomic data
Calcium
Emission analysis
Emission lines
Hydrogen
Hydrogen storage
Laboratories
Line spectra
methods: laboratory: atomic
Plasma jets
Spectral resolution
Tokamak devices
Wavelengths
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Summary:The utility of Ca in the EUV spectral range of astrophysical observations is limited by a fragmentary and incomplete record of laboratory data. In order to obtain a more comprehensive survey of the Ca line emission in the EUV, we have used a tokamak plasma discharge in hydrogen carrying some Ar and intermittently seeded with Ca as a tool for investigating the emission line intensity pattern of highly charged Ca and Ar ions in the wavelength range 100-285 with 0.35 spectral resolution. We compare our data to wavelengths and line ratios in much-used databases, especially CHIANTI, and we discuss apparent inconsistencies.
Bibliography:AAS12057
Instrumentation, Software, Laboratory Astrophysics, and Data
AC52-07NA27344
LLNL-JRNL-753784
USDOE Office of Science (SC)
USDOE National Nuclear Security Administration (NNSA)
ISSN:0004-637X
1538-4357
1538-4357
DOI:10.3847/1538-4357/aadba7