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Results Progress and Plans for Magnetized Liner Inertial Fusion (MagLIF) on Z

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.

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TYPE Presentation YEAR 2014
OSTI

Signatures of hot electrons and fluorescence in Mo Kα emission on Z

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.

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TYPE Conference YEAR 2014
ScopusOSTI

Diagnostic constraints on the amount of cold mass in imploded argon pinches on Z

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.

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TYPE Conference Poster YEAR 2014
ScopusOSTI

Modified helix-like instability structure on imploding z-pinch liners that are pre-imposed with a uniform axial magnetic field

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.

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TYPE Journal Article YEAR 2014
OSTIDOI

Observations of Modified Three-Dimensional Instability Structure for Imploding z -Pinch Liners that are Premagnetized with an Axial Field

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.

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TYPE Journal Article YEAR 2013
OSTIDOI
Results 201–225 of 303
Results 201–225 of 303