Study of M-Shell Radiation of Tungsten Ions from X-Pinches with Different Compositions of Loads

Summary form only given. X-pinch experiments using 188 alloy and combined Mo/W wires were implemented at the Cornell 450 kA XP facility. The spatially resolved, time-gated and integrated X-ray line spectra have been recorded using different crystal spectrometers (time-gated ADP and time-integrated mica crystal spectrometers). In particular, K-shell and L-shell X-ray line spectra from Cr, Co, and Ni ions as well as M-shell spectra from W ions have been recorded through different filters in the same shot from the 188 wire alloy X-pinch. In addition, L-shell spectra of Mo ions and M-shell spectra of W ions have been studied produced from X-pinches composed from two different wires of Mo and W. Non-LTE collisional-radiative (CR) atomic kinetic models of Ni and Co have been developed earlier to identify the useful K- and L-shell diagnostic features in X-pinch plasmas from nichrome and conichrome alloys produced at the same Cornell XP device. These models along with the Mo model were used in the present work to interpret X-ray spectra from 188 alloys and to isolate M-shell spectra of W ions. The newly developed non-LTE CR model of W has been applied to identify and diagnose the spectral features of W ions in both types of X-pinches. The distinct features, similarities, and differences of these M-shell spectra of W ions have been analyzed and compared for both types of X-pinches. The future development of this work is discussed.