Spectroscopy of M-shell x-ray transitions in Zn-like through Co-like W

Abstract

The M-shell x-ray emission of highly charged tungsten ions has been investigated at the Livermore electron beam ion trap facility. Using the SuperEBIT electron beam ion trap and a NASA x-ray calorimeter array, transitions connecting to levels of the ground configurations in the 1500–3600 eV spectral range of zinc-like W 44+ through cobalt-like W 47+ have been measured. The measured spectra are compared with theoretical line positions and emissivities calculated using the FAC code.