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Analyzing non-LTE Kr plasmas produced in high energy density experiments: From the Z machine to the National Ignition Facility

Ampleford, David A.; Dasgupta, A.D.; Clark, R.E.; Giuliani, J.G.; Ouart, N.D.; Velikovich, A.L.; Hansen, Stephanie B.; Jennings, Christopher A.; Flanagan, Timothy M.; Bell, Kate S.; Harvey-Thompson, Adam J.; Jones, Brent M.; May, M.M.; Barrios, M.B.; Scott, H.S.; Fournier, K.F.; Colvin, J.C.; Kemp, G.K.

Abstract not provided.

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TYPE Conference Poster YEAR 2016
OSTI

Non-thermal x-ray emission from wire array z-pinches

Ampleford, David A.; Hansen, Stephanie B.; Jennings, Christopher A.; Webb, Timothy J.; Harper-Slaboszewicz, V.H.; Loisel, Guillaume P.; Flanagan, Timothy M.; Bell, Kate S.; Jones, Brent M.; Rochau, G.A.; Chittenden, Jeremy P.; Sherlock, Mark S.; Appelbe, Brian A.; Giuliani, John G.; Ouart, Nicholas O.; Seely, John S.; McPherson, Leroy A.

We report on experiments demonstrating the transition from thermally-dominated K-shell line emission to non-thermal, hot-electron-driven inner-shell emission for z pinch plasmas on the Z machine. While x-ray yields from thermal K-shell emission decrease rapidly with increasing atomic number Z, we find that non-thermal emission persists with favorable Z scaling, dominating over thermal emission for Z=42 and higher (hn ≥ 17keV). Initial experiments with Mo (Z=42) and Ag (Z=47) have produced kJ-level emission in the 17-keV and 22-keV Kα lines respectively. We will discuss the electron beam properties that could excite these non - thermal lines. We also report on experiments that have attempted to control non - thermal K - shell line emission by modifying the wire array or load hardware setup.

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TYPE SAND Report YEAR 2015
OSTIDOI
Results 26–36 of 36
Results 26–36 of 36