Publications

Hansen, Stephanie B.; Desjarlais, Michael P.; Starrett, C S.; Saumon, D.S.; Ng, A.N.; Recoules, V.R.

Abstract not provided.

Hansen, Stephanie B.

Abstract not provided.

Nagayama, Taisuke N.; Bailey, James E.; Hansen, Stephanie B.; Loisel, Guillaume P.; Rochau, G.A.

Abstract not provided.

Gomez, Matthew R.; Ampleford, David A.; Awe, Thomas J.; Bailey, James E.; Harvey-Thompson, Adam J.; Jones, Brent M.; Knapp, Patrick K.; Cuneo, M.E.; Rochau, G.A.; Sinars, Daniel S.; Hansen, Stephanie B.; Peterson, Kyle J.; McBride, Ryan D.; Jennings, Christopher A.; Bliss, David E.; Carlson, Alan L.; Lamppa, Derek C.

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Peterson, Kyle J.; Slutz, Stephen A.; Sinars, Daniel S.; Sefkow, Adam B.; Gomez, Matthew R.; Awe, Thomas J.; Harvey-Thompson, Adam J.; Geissel, Matthias G.; Schmit, Paul S.; Smith, Ian C.; McBride, Ryan D.; Rovang, Dean C.; Knapp, Patrick K.; Hansen, Stephanie B.; Jennings, Christopher A.; Harding, Eric H.; Porter, John L.; Vesey, Roger A.; Blue, Brent B.; Schroen, Diana G.; Tomlinson, Kurt T.

Abstract not provided.

Harvey-Thompson, Adam J.; Jones, Michael J.; Moore, Nathan W.; Flanagan, Timothy M.; Mckenney, John M.; Coverdale, Christine A.; Coverdale, Christine A.; Jennings, Christopher A.; Jones, Brent M.; Ampleford, David A.; Hansen, Stephanie B.; Lamppa, Derek C.; Cuneo, M.E.; Reneker, Joseph R.; Johnson, Drew J.

Abstract not provided.

Ampleford, David A.; Hansen, Stephanie B.; Jennings, Christopher A.; Jones, Brent M.

Abstract not provided.

Atoms

Hansen, Stephanie B.

Abstract not provided.

Ampleford, David A.; Jennings, Christopher A.; Hansen, Stephanie B.; Jones, Brent M.; Harvey-Thompson, Adam J.; Lamppa, Derek C.; Coverdale, Christine A.

Abstract not provided.

Physics of Plasmas

Hansen, Stephanie B.; Ampleford, David A.; Cuneo, M.E.; Ouart, N.; Jones, Brent M.; Jennings, C.A.; Dasgupta, A.; Coverdale, Christine A.; Rochau, G.A.; Dunham, Gregory S.; Giuliani, J.L.; Apruzese, J.P.

Recent experiments on the Z accelerator have produced high-energy (17 keV) inner-shell K-alpha emission from molybdenum wire array z-pinches. Extensive absolute power and spectroscopic diagnostics along with collisional-radiative modeling enable detailed investigation into the roles of thermal, hot electron, and fluorescence processes in the production of high-energy x-rays. We show that changing the dimensions of the arrays can impact the proportion of thermal and non-thermal K-shell x-rays. © 2014 AIP Publishing LLC.

AIP Conference Proceedings

Apruzese, J.P.; Jones, Brent M.; Giuliani, J.L.; Ouart, N.D.; Thornhill, J.W.; Harvey-Thompson, Adam J.; Ampleford, David A.; Jennings, C.A.; Hansen, Stephanie B.; Moore, N.W.; Lamppa, Derek C.; Coverdale, C.A.; Cuneo, M.E.; Rochau, G.A.

The refurbished Z machine at Sandia National Laboratories has been successfully configured to drive gas-puff Z pinches. A series of experiments using Ar loads produced K-shell yields of 330 ± 9% kJ, with highly reproducible K-shell spectra and power pulses. Using spectroscopic and power data, we are able to constrain the properties of both the cold, non-K-shell radiating mass as well as the hot K-shell component of the pinch plasma. As in previous gas-puff shots on the original version of Z, only about 1/4 to 1/3 of the load mass was heated to temperatures sufficient to produce K-shell x-rays.

Physics of Plasmas

Awe, Thomas J.; Owen, Albert C.; Gomez, Matthew R.; Hansen, Stephanie B.; Herrmann, Mark H.; Jones, Michael J.; Mckenney, John M.; Robertson, Grafton K.; Rochau, G.A.; Savage, Mark E.; Stygar, William A.; Jennings, Christopher A.; McBride, Ryan D.; Lamppa, Derek C.; Martin, Matthew; Rovang, Dean C.; Sinars, Daniel S.; Slutz, Stephen A.; Cuneo, M.E.

Abstract not provided.

Physics of Plasmas

Ampleford, David A.; Jones, Brent M.; Jennings, Christopher A.; Hansen, Stephanie B.; Cuneo, M.E.; Harvey-Thompson, Adam J.; Rochau, G.A.; Flanagan, Timothy M.; Moore, Nathan W.

Abstract not provided.

Physical Review Letters

McBride, Ryan D.; Gomez, Matthew R.; Hansen, Stephanie B.; Herrmann, Mark H.; Mckenney, John M.; Robertson, Grafton K.; Rochau, G.A.; Savage, Mark E.; Stygar, William A.; Jennings, Christopher A.; Lamppa, Derek C.; Martin, Matthew; Rovang, Dean C.; Slutz, Stephen A.; Cuneo, M.E.; Owen, Albert C.; Sinars, Daniel S.

Novel experimental data are reported that reveal helical instability formation on imploding z -pinch liners that are premagnetized with an axial field. Such instabilities differ dramatically from the mostly azimuthally symmetric instabilities that form on unmagnetized liners. The helical structure persists at nearly constant pitch as the liner implodes. This is surprising since, at the liner surface, the azimuthal drive field presumably dwarfs the axial field for all but the earliest stages of the experiment. These fundamentally 3D results provide a unique and challenging test for 3D-magnetohydrodynamics simulations.

Physics of Plasmas

Nagayama, Taisuke N.; Bailey, James E.; Loisel, Guillaume P.; Hansen, Stephanie B.; Rochau, G.A.

Abstract not provided.

Harding, Eric H.; Lemke, Raymond W.; Ao, Tommy A.; Bailey, James E.; Hansen, Stephanie B.; Desjarlais, Michael P.; Geissel, Matthias G.; Sinars, Daniel S.; Rochau, G.A.

Abstract not provided.

Hansen, Stephanie B.

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Hansen, Stephanie B.

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Loisel, Guillaume P.; Bailey, James E.; Ball, Christopher R.; Dunham, Gregory S.; Hansen, Stephanie B.; Nagayama, Taisuke N.; Rochau, G.A.

Abstract not provided.

Jennings, Christopher A.; Ampleford, David A.; Harvey-Thompson, Adam J.; Jones, Brent M.; Hansen, Stephanie B.; Lamppa, Derek C.; Jobe, Marc R.; Cuneo, M.E.

Abstract not provided.

McBride, Ryan D.; Slutz, Stephen A.; Hansen, Stephanie B.

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Hansen, Stephanie B.; Jones, Brent M.; Knapp, Patrick K.; Lamppa, Derek C.; McBride, Ryan D.; Bailey, James E.; Rochau, G.A.; Slutz, Stephen A.; Sinars, Daniel S.; Gomez, Matthew R.; Peterson, Kyle J.; Ampleford, David A.; Awe, Thomas J.; Bliss, David E.; Carlson, Alan L.; Cuneo, M.E.; Jennings, Christopher A.; Harvey-Thompson, Adam J.

Abstract not provided.

Hansen, Stephanie B.; Harvey-Thompson, Adam J.; Knapp, Patrick K.; Rochau, G.A.; Sinars, Daniel S.; Peterson, Kyle J.; Awe, Thomas J.; Gomez, Matthew R.; Vesey, Roger A.; Slutz, Stephen A.; Herrmann, Mark H.; Jennings, Christopher A.

Abstract not provided.

Ampleford, David A.; Flanagan, Timothy M.; Webb, Timothy J.; Harper-Slaboszewicz, V.H.; Cuneo, M.E.; Rochau, G.A.; Dunham, Gregory S.; Coverdale, Christine A.; Hansen, Stephanie B.; Jennings, Christopher A.; Jones, Brent M.; Harvey-Thompson, Adam J.

Abstract not provided.

Nagayama, Taisuke N.; Bailey, James E.; Rochau, G.A.; Hansen, Stephanie B.

Abstract not provided.