Publications

Myers, Clayton E.; Hare, Jack H.; Ampleford, David A.; Aragon, Carlos A.; Chittenden, Jeremy P.; Colombo, Anthony P.; Crilly, Aidan C.; Datta, Rishabh D.; Edens, Aaron E.; Fox, Will F.; Gomez, Matthew R.; Halliday, Jack H.; Hansen, Stephanie B.; Harding, Eric H.; Harmon, Roger L.; Jones, Michael J.; Jennings, Christopher A.; Ji, Hantao J.; Kuranz, Carolyn K.; Lebedev, Sergey L.; Looker, Quinn M.; Melean, Raul M.; Uzdensky, Dmitri U.; Webb, Timothy J.

Abstract not provided.

Physics of Plasmas

Galloway, B.R.; Slutz, S.A.; Kimmel, Mark W.; Rambo, Patrick K.; Schwarz, Jens S.; Geissel, Matthias G.; Harvey-Thompson, Adam J.; Weis, M.R.; Jennings, C.A.; Field, Ella S.; Kletecka, Damon E.; Looker, Q.; Colombo, Anthony P.; Edens, Aaron E.; Smith, Ian C.; Shores, J.E.; Speas, C.S.; Speas, Robert J.; Spann, A.P.; Sin, J.; Gautier, S.; Sauget, V.; Treadwell, P.A.; Rochau, G.A.; Porter, John L.

At the Z Facility at Sandia National Laboratories, the magnetized liner inertial fusion (MagLIF) program aims to study the inertial confinement fusion in deuterium-filled gas cells by implementing a three-step process on the fuel: premagnetization, laser preheat, and Z-pinch compression. In the laser preheat stage, the Z-Beamlet laser focuses through a thin polyimide window to enter the gas cell and heat the fusion fuel. However, it is known that the presence of the few μm thick window reduces the amount of laser energy that enters the gas and causes window material to mix into the fuel. These effects are detrimental to achieving fusion; therefore, a windowless target is desired. The Lasergate concept is designed to accomplish this by "cutting"the window and allowing the interior gas pressure to push the window material out of the beam path just before the heating laser arrives. In this work, we present the proof-of-principle experiments to evaluate a laser-cutting approach to Lasergate and explore the subsequent window and gas dynamics. Further, an experimental comparison of gas preheat with and without Lasergate gives clear indications of an energy deposition advantage using the Lasergate concept, as well as other observed and hypothesized benefits. While Lasergate was conceived with MagLIF in mind, the method is applicable to any laser or diagnostic application requiring direct line of sight to the interior of gas cell targets.

Galloway, B.R.; Slutz, Stephen A.; Kimmel, Mark W.; Rambo, Patrick K.; Schwarz, Jens S.; Geissel, Matthias G.; Harvey-Thompson, Adam J.; Weis, Matthew R.; Jennings, Christopher A.; Field, Ella S.; Kletecka, Damon E.; Looker, Quinn M.; Colombo, Anthony P.; Edens, Aaron E.; Smith, Ian C.; Shores, Jonathon S.; Speas, Christopher S.; Speas, Robert J.; Spann, Andrew S.; Sin, Justin S.; Gautier, Sophie G.; Sauget, Vincent S.; Treadwell, Paul T.; Rochau, G.A.; Porter, John L.

Abstract not provided.

Colombo, Anthony P.; Edens, Aaron E.; Looker, Quinn M.; Stahoviak, John W.; Kimmel, Mark W.; Loisel, Guillaume P.; Bailey, James E.; Dunham, Gregory S.; Gard, Paul D.; Kellogg, Jeffrey W.; Porter, John L.

Abstract not provided.

Loisel, Guillaume P.; Bailey, James E.; Nagayama, Taisuke N.; Dunham, Gregory S.; Gard, Paul D.; Rochau, G.A.; Colombo, Anthony P.; Edens, Aaron E.; Looker, Quinn M.; Kimmel, Mark W.; Stahoviak, John W.; Porter, John L.

Abstract not provided.

Colombo, Anthony P.; Edens, Aaron E.; Kimmel, Mark W.; Looker, Quinn M.; Porter, John L.; Stahoviak, John W.

Abstract not provided.

Edens, Aaron E.; Kimmel, Mark W.; Looker, Quinn M.; Colombo, Anthony P.; Kellogg, Jeffrey W.; Speas, Christopher S.; Stahoviak, John W.; Rambo, Patrick K.; Smith, Ian C.; Jones, Michael J.; Porter, John L.

Abstract not provided.

Loisel, Guillaume P.; Bailey, James E.; Nagayama, Taisuke N.; Dunham, Gregory S.; Gard, Paul D.; Rochau, G.A.; Colombo, Anthony P.; Edens, Aaron E.; Looker, Quinn M.; Kimmel, Mark W.; Stahoviak, J.W.; Porter, John L.

Abstract not provided.

Looker, Quinn M.; Colombo, Anthony P.; Edens, Aaron E.; Kimmel, Mark W.; Stahoviak, John W.; Sanchez, Marcos S.; Claus, Liam D.; Wood, Michael G.; Rochau, G.A.; Porter, John L.

Abstract not provided.

Edens, Aaron E.; Kimmel, Mark W.; Looker, Quinn M.; Colombo, Anthony P.; Speas, C.S.; Galloway, Ben G.; Weiss, Matt W.; Stahoviak, John W.; Rambo, Patrick K.; Smith, Ian C.; Lewis, Sean M.; Rochau, G.A.; Porter, John L.

Abstract not provided.

Colombo, Anthony P.; Edens, Aaron E.; Kimmel, Mark W.; Looker, Quinn M.; Porter, John L.; Stahoviak, John W.

Abstract not provided.

Geissel, Matthias G.; Edens, Aaron E.; Schollmeier, Marius; Smith, Ian C.; Shores, Jonathon S.

Abstract not provided.

Edens, Aaron E.

Abstract not provided.

Cuneo, M.E.; Jones, Michael J.; Edens, Aaron E.; Lopez, Mike R.; McBride, Ryan D.; Rochau, G.A.; Jones, Brent M.; Ampleford, David A.; Sinars, Daniel S.; Bailey, James E.; Stygar, William A.; Savage, Mark E.

Abstract not provided.

Edens, Aaron E.; Schwarz, Jens S.

This document describes the original goals of the project to study the Vishniac Overstability on blast waves produced using the Z-Beamlet laser facility as well as the actual results. The proposed work was to build on earlier work on the facility and result in the best characterized set of data for such phenomena in the laboratory. To accomplish the goals it was necessary to modify the existing probe laser at the facility so that it could take multiple images over the course of 1-2 microseconds. Troubles with modifying the probe laser are detailed as well as the work that went into said modifications. The probe laser modification ended up taking the entire length of the project and were the major accomplishment of the research.

Cuneo, M.E.; Jones, Michael J.; Edens, Aaron E.; Lopez, Mike R.; McBride, Ryan D.; Rochau, G.A.; Jones, Brent M.; Ampleford, David A.; Sinars, Daniel S.; Bailey, James E.; Stygar, William A.; Savage, Mark E.

Abstract not provided.

Sinars, Daniel S.; Edens, Aaron E.; Lopez, Mike R.; Smith, Ian C.; Slutz, Stephen A.; Shores, Jonathon S.; Bennett, Guy R.; Atherton, B.W.; Savage, Mark E.; Stygar, William A.; Leifeste, Gordon T.; Herrmann, Mark H.; Cuneo, M.E.; Peterson, Kyle J.; McBride, Ryan D.; Jennings, Christopher A.; Vesey, Roger A.; Nakhleh, Charles N.

Abstract not provided.

Cuneo, M.E.; Savage, Mark E.; Jones, Michael J.; Edens, Aaron E.; Lopez, Mike R.; Gomez, Matthew R.; McBride, Ryan D.; Rochau, G.A.; Jones, Brent M.; Ampleford, David A.; Sinars, Daniel S.; Bailey, James E.; Stygar, William A.

Abstract not provided.

Cuneo, M.E.; Jones, Michael J.; Edens, Aaron E.; Lopez, Mike R.; McBride, Ryan D.; Rochau, G.A.; Jones, Brent M.; Ampleford, David A.; Sinars, Daniel S.; Bailey, James E.; Stygar, William A.; Savage, Mark E.

Abstract not provided.

Cuneo, M.E.; Jones, Michael J.; Edens, Aaron E.; Lopez, Mike R.; McBride, Ryan D.; Rochau, G.A.; Jones, Brent M.; Ampleford, David A.; Sinars, Daniel S.; Bailey, James E.; Stygar, William A.; Savage, Mark E.

Abstract not provided.

Physics of Plasmas

Sinars, Daniel S.; Edens, Aaron E.; Lopez, Mike R.; Smith, Ian C.; Shores, Jonathon S.; Slutz, Stephen A.; Bennett, Guy R.; Atherton, B.W.; Savage, Mark E.; Stygar, William A.; Leifeste, Gordon T.; Herrmann, Mark H.; McBride, Ryan D.; Cuneo, M.E.; Jennings, Christopher A.; Peterson, Kyle J.; Vesey, Roger A.; Nakhleh, Charles N.

Abstract not provided.

Sinars, Daniel S.; Edens, Aaron E.; Lopez, Mike R.; Smith, Ian C.; Shores, Jonathon S.; Bennett, Guy R.; Atherton, B.W.; Savage, Mark E.; Stygar, William A.; Leifeste, Gordon T.; Slutz, Stephen A.; Herrmann, Mark H.; Cuneo, M.E.; Peterson, Kyle J.; McBride, Ryan D.; Vesey, Roger A.; Nakhleh, Charles N.; Tomlinson, Kurt T.

The magneto-Rayleigh-Taylor (MRT) instability is the most important instability for determining whether a cylindrical liner can be compressed to its axis in a relatively intact form, a requirement for achieving the high pressures needed for inertial confinement fusion (ICF) and other high energy-density physics applications. While there are many published RT studies, there are a handful of well-characterized MRT experiments at time scales >1 {micro}s and none for 100 ns z-pinch implosions. Experiments used solid Al liners with outer radii of 3.16 mm and thicknesses of 292 {micro}m, dimensions similar to magnetically-driven ICF target designs [1]. In most tests the MRT instability was seeded with sinusoidal perturbations ({lambda} = 200, 400 {micro}m, peak-to-valley amplitudes of 10, 20 {micro}m, respectively), wavelengths similar to those predicted to dominate near stagnation. Radiographs show the evolution of the MRT instability and the effects of current-induced ablation of mass from the liner surface. Additional Al liner tests used 25-200 {micro}m wavelengths and flat surfaces. Codes being used to design magnetized liner ICF loads [1] match the features seen except at the smallest scales (<50 {micro}m). Recent experiments used Be liners to enable penetrating radiography using the same 6.151 keV diagnostics and provide an in-flight measurement of the liner density profile.

Schollmeier, Marius; Geissel, Matthias G.; Bennett, Guy R.; Edens, Aaron E.; Kimmel, Mark W.; Rambo, Patrick K.; Schwarz, Jens S.; Atherton, B.W.

Abstract not provided.

Geissel, Matthias G.; Atherton, B.W.; Bennett, Guy R.; Edens, Aaron E.; Kimmel, Mark W.; Rambo, Patrick K.; Schwarz, Jens S.; Sinars, Daniel S.

Abstract not provided.

Geissel, Matthias G.; Atherton, B.W.; Bennett, Guy R.; Edens, Aaron E.; Kimmel, Mark W.; Rambo, Patrick K.; Schwarz, Jens S.; Sinars, Daniel S.

Abstract not provided.