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

Abstract

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 Å with 0.35 Å spectral resolution. Here, we compare our data to wavelengths and line ratios in much-used databases, especially CHIANTI, and we discuss apparent inconsistencies.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [5]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Ruhr-Univ. Bochum, Bochum (Germany). Astronomisches Inst.
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1545272
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 865; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; atomic data; methods: laboratory: atomic

Citation Formats

Träbert, Elmar, Beiersdorfer, Peter, Lepson, Jaan K., Reinke, Matthew L., and Rice, John E. EUV Spectra and Line Ratios of Multiply Ionized Calcium and Argon Atoms in a Laboratory Plasma. United States: N. p., 2018. Web. doi:10.3847/1538-4357/aadba7.
Träbert, Elmar, Beiersdorfer, Peter, Lepson, Jaan K., Reinke, Matthew L., & Rice, John E. EUV Spectra and Line Ratios of Multiply Ionized Calcium and Argon Atoms in a Laboratory Plasma. United States. doi:10.3847/1538-4357/aadba7.
Träbert, Elmar, Beiersdorfer, Peter, Lepson, Jaan K., Reinke, Matthew L., and Rice, John E. Mon . "EUV Spectra and Line Ratios of Multiply Ionized Calcium and Argon Atoms in a Laboratory Plasma". United States. doi:10.3847/1538-4357/aadba7. https://www.osti.gov/servlets/purl/1545272.
@article{osti_1545272,
title = {EUV Spectra and Line Ratios of Multiply Ionized Calcium and Argon Atoms in a Laboratory Plasma},
author = {Träbert, Elmar and Beiersdorfer, Peter and Lepson, Jaan K. and Reinke, Matthew L. and Rice, John E.},
abstractNote = {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 Å with 0.35 Å spectral resolution. Here, we compare our data to wavelengths and line ratios in much-used databases, especially CHIANTI, and we discuss apparent inconsistencies.},
doi = {10.3847/1538-4357/aadba7},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 865,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
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