Conference proceeding
Spectroscopic Comparisons of X-pinch Tungsten Plasmas to LLNL EBIT Data
2007 IEEE 34th International Conference on Plasma Science (ICOPS), pp 406-406
Jun 2007
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.
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Details
- Title
- Spectroscopic Comparisons of X-pinch Tungsten Plasmas to LLNL EBIT Data
- Creators
- G Osborne - University of Nevada RenoA. S Safronova - University of Nevada RenoV. L Kantsyrev - University of Nevada RenoP Neill - University of Nevada RenoU.I Safronova - University of Nevada RenoM.F Yilmaz - University of Nevada RenoK Williamson - University of Nevada, RenoI Shrestha - University of Nevada RenoT Hoppe - University of Nevada RenoC Harris - West Coast University – PanamaP Beiersdorfer - Lawrence Livermore National Laboratory
- Publication Details
- 2007 IEEE 34th International Conference on Plasma Science (ICOPS), pp 406-406
- Publisher
- IEEE
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- College of Medicine
- Other Identifier
- 991019182659404721