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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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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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 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.
AbstractList 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. We compare our data to wavelengths and line ratios in much-used databases, especially CHIANTI, and we discuss apparent inconsistencies.
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.
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. We compare our data to wavelengths and line ratios in much-used databases, especially CHIANTI, and we discuss apparent inconsistencies.
Author Beiersdorfer, Peter
Lepson, Jaan K.
Träbert, Elmar
Rice, John E.
Reinke, Matthew L.
Author_xml – sequence: 1
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  orcidid: 0000-0002-3949-0372
  surname: Träbert
  fullname: Träbert, Elmar
  organization: Astronomisches Institut , Ruhr-Universität Bochum, 44780 Bochum, Germany
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  givenname: Peter
  orcidid: 0000-0003-0127-599X
  surname: Beiersdorfer
  fullname: Beiersdorfer, Peter
  organization: Lawrence Livermore National Laboratory Physics Division, Physical and Life Sciences, Livermore, CA 94550-9234, USA
– sequence: 3
  givenname: Jaan K.
  surname: Lepson
  fullname: Lepson, Jaan K.
  organization: University of California Space Sciences Laboratory, Berkeley, CA 94721, USA
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  givenname: Matthew L.
  surname: Reinke
  fullname: Reinke, Matthew L.
  organization: Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA
– sequence: 5
  givenname: John E.
  surname: Rice
  fullname: Rice, John E.
  organization: Plasma Science and Fusion Center, MIT, Cambridge, MA 02139, USA
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Copyright IOP Publishing Oct 01, 2018
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Snippet 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...
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...
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StartPage 148
SubjectTerms 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
Title EUV Spectra and Line Ratios of Multiply Ionized Calcium and Argon Atoms in a Laboratory Plasma
URI https://iopscience.iop.org/article/10.3847/1538-4357/aadba7
https://www.proquest.com/docview/2365967391
https://www.osti.gov/servlets/purl/1545272
Volume 865
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