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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Osborne, G. Safronova, A.S. Kantsyrev, V.L. Neill, P. Safronova, U.I. Yilmaz, M.F. Williamson, K. Shrestha, I. Hoppe, T. Harris, C. Beiersdorfer, P. |
| Copyright Year | 2007 |
| Description | Author affiliation: Nevada Univ., Reno (Osborne, G.; Safronova, A.S.; Kantsyrev, V.L.; Neill, P.; Safronova, U.I.; Yilmaz, M.F.; Williamson, K.; Shrestha, I.; Hoppe, T.) |
| Abstract | Summary form only given. X-pinches produce the high density and temperature plasmas that scale from a few mum to mm in size. They are an excellent source to test new HEDP diagnostics and modeling. X-pinches in particular offer a variety of load configurations that differ in the type of wire connections, number of wires and wire materials. The present work focuses on development of M-shell W diagnostics for HEDP. The experiments were performed on the 1 MA Zebra generator at UNR and the loads were X-pinches and wire arrays with tungsten wires combined with wires from other, lower-z materials (Al and Mo). The identification of x-ray M-shell W spectra in a spectral region from 4 to 8 angstroms from these experiments as well as the theoretical modeling was benchmarked with LLNL EBIT data produced at different energies of the electron beam (Eb). For example, Ni-like W lines from EBIT spectra that dominate in the broad energy range Eb=3-4 keV serve as a good indicator of M-shell W lines in X-pinch and wire array x-ray spectra. In addition, the spectral features on the right from Ni-like lines were higher ionization stages (from Co-to Mn-like ions) while on the left were from lower ionization stages (from Cu -to Ge-like ions). The non-LTE kinetic model of W as well as of Al and Mo were used to distinguish M-shell W from K-shell Al and L-shell Mo spectra and to estimate plasma parameters. The future work with more comparisons with LLNL EBIT data is discussed. |
| Starting Page | 406 |
| Ending Page | 406 |
| File Size | 47149 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781424409150 |
| ISSN | 07309244 |
| DOI | 10.1109/PPPS.2007.4345712 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-06-17 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Spectroscopy Tungsten Wire Plasma temperature Plasma density Plasma diagnostics Plasma sources Ionization Plasma materials processing Testing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
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