title: X-ray absorption spectroscopy of aluminum z-pinch plasma with tungsten backlighter planar wire array source.
abstract: Absorption features from K-shell aluminum z-pinch plasmas have recently been studied on Zebra, the 1.7 MA pulse power generator at the Nevada Terawatt Facility. In particular, tungsten plasma has been used as a semi-backlighter source in the generation of aluminum K-shell absorption spectra by placing a single Al wire at or near the end of a single planar W array. All spectroscopic experimental results were recorded using a time-integrated, spatially resolved convex potassium hydrogen phthalate (KAP) crystal spectrometer. Other diagnostics used to study these plasmas included x-ray detectors, optical imaging, laser shadowgraphy, and time-gated and time-integrated x-ray pinhole imagers. Through comparisons with previous publications, Al K-shell absorption lines are shown to be from much lower electron temperature (∼10-40 eV) plasmas than emission spectra (∼350-500 eV).
authors.affiliation: Physics Department, University of Nevada, Reno, Reno, Nevada 89557, USA.
authors.forename: G C
authors.initials: GC
authors.lastname: Osborne
authors.forename: V L
authors.initials: VL
authors.lastname: Kantsyrev
authors.forename: A S
authors.initials: AS
authors.lastname: Safronova
authors.forename: A A
authors.initials: AA
authors.lastname: Esaulov
authors.forename: M E
authors.initials: ME
authors.lastname: Weller
authors.forename: I
authors.initials: I
authors.lastname: Shrestha
authors.forename: V V
authors.initials: VV
authors.lastname: Shlyaptseva
authors.forename: N D
authors.initials: ND
authors.lastname: Ouart