title: Measurement of the ionization state and electron temperature of plasma during the ablation stage of a wire-array Z pinch using absorption spectroscopy.
abstract: Wire-array plasmas were investigated in the nonradiative ablation stage via x-ray absorption spectroscopy. A laser-produced Sm plasma was used to backlight Al wire arrays. The Sm spectrum was simultaneously observed by two spectrometers: one recorded the unattenuated spectrum and the other the transmission spectrum with 1.45-1.55 keV K-shell absorption lines. Analysis of absorption spectra revealed electron temperature in the range of 10-30 eV and the presence of F-, O-, N- and C-like Al ions in the absorbing plasma. A comparison of this electron temperature with the postprocessed absorption spectra of a 2D MHD simulation yields results in general agreement with the data analysis.
authors.affiliation: Department of Physics, University of Nevada, Reno, Nevada 89557, USA.
authors.forename: V V
authors.initials: VV
authors.lastname: Ivanov
authors.forename: P
authors.initials: P
authors.lastname: Hakel
authors.forename: R C
authors.initials: RC
authors.lastname: Mancini
authors.forename: J P
authors.initials: JP
authors.lastname: Chittenden
authors.forename: A
authors.initials: A
authors.lastname: Anderson
authors.forename: T
authors.initials: T
authors.lastname: Durmaz
authors.forename: P
authors.initials: P
authors.lastname: Wiewior
authors.forename: D
authors.initials: D
authors.lastname: Papp
authors.forename: S D
authors.initials: SD
authors.lastname: Altemara
authors.forename: A L
authors.initials: AL
authors.lastname: Astanovitskiy
authors.forename: O
authors.initials: O
authors.lastname: Chalyy