Abstract
X-ray spectra in the range 7 - 10 Å from highly charged tungsten (Z = 74) ions were observed in the tokamak ASDEX Upgrade. Lines emitted from to were identified by comparison with ab initio calculations and with the expected ionization equilibrium charge-state distribution. Most of the features in the observed spectra coincide with predicted lines. A spectral line of As I-like could be identified as the predominant one for plasmas with 2.5 - 3 keV central electron temperature. The calculations predict clearly separated spectral lines for Kr I-like W at about 18.4 Å and strong lines between 5.6 and 6.0 Å for all charge states under consideration that can be used for monitoring W densities in the soft x-ray region. Tungsten concentrations in the range of were extracted from the emissivities of spectral lines from and .
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics B: Atomic, Molecular and Optical Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
