High-resolution x-ray spectra from molybdenum ions in the Alcator-Ctokamak

We report on measurements of the x-ray line emission in the wavelength region λ=4.3-5.3 {} from molybdenum in charge states between 28+ and 32+. The experimental results were compared with calculated line spectra (also presented) which facilitated the identification of many of the principal 2p-3d, 2s-3p, and 2p-3s transitions. Some indications of weaker satellite-line contributions were also found. The principal 2p-3d transitions were found to be the dominant ones. In particular, Mo³²⁺ gave stronger contributions than other charge states for our plasma condition of Tₑ=1.0-1.5 keV while available calculations of relative ion abundances have predicted Mo³²⁺ to be relatively strongest at Tₑ=2.5-3.0 keV.