Ralchenko, Y.
, Draganic, I.
, Osin, D.
, Gillaspy, J.
and Reader, J.
(2011),
Spectroscopy of diagnostically-important magnetic-dipole lines in highly-charged 3d^n ions of tungsten, Physical Review A, [online], https://doi.org/10.1103/PhysRevA.83.032517
(Accessed October 12, 2025)
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Spectroscopy of diagnostically-important magnetic-dipole lines in highly-charged 3d^n ions of tungsten
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Abstract
An electron beam ion trap (EBIT) is used to measure extreme ultraviolet spectra between 10 nm and 25 nm from highly-charged ions of tungsten with an open 3d shell (W XLVIII through W LVI). We found that almost all strong lines are due to the forbidden magnetic-dipole (M1) transitions within 3dn ground configurations. A total of 37 spectral lines are identified for the first time using detailed collisional-radiative (CR) modeling of the EBIT spectra. A new level-merging scheme for compactification of rate equations is described. The CR simulations for Maxwellian plasmas show that several line ratios involving these M1 lines can be used to reliably diagnose temperature and density in hot fusion devices.Citation
Physical Review A
Volume
83
Pub Type
Journals
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Keywords
highly-charged ions, tungsten, magnetic-dipole lines, collisional-radiative modeling, plasma diagnostics
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Created March 31, 2011, Updated June 2, 2021