Publications

Sandia journal manuscript; Not yet accepted for publication

Slutz, Stephen A.; Gomez, Matthew R.; Sefkow, Adam B.; Sinars, Daniel S.; Hahn, Kelly D.; Hansen, Stephanie B.; Harding, Eric H.; Knapp, Patrick K.; Schmit, Paul S.; Jennings, Christopher A.; Awe, Thomas J.; Herrmann, M.C.H.; Hess, Mark H.; Johns, Owen J.; Lamppa, Derek C.; Martin, Matthew; McBride, Ryan D.; Geissel, Matthias G.; Rovang, Dean C.; Chandler, Gordon A.; Cooper, Gary W.; Cuneo, M.E.; Harvey-Thompson, Adam J.; Peterson, Kyle J.; Porter, John L.; Robertson, Grafton K.; Rochau, G.A.; Ruiz, Carlos L.; Savage, Mark E.; Smith, Ian C.; Stygar, William A.; Vesey, Roger A.

The standard approaches to inertial confinement fusion (ICF) rely on implosion velocities greater than 300 km/s and spherical convergence to achieve the high fuel temperatures (T > 4 keV) and areal densities (ρr > 0.3 g/cm2) required for ignition1. Such high velocities are achieved by heating the outside surface of a spherical capsuleeither directly with a large number of laser beams (Direct Drive) or with x-rays generated within a hohlraum (Indirect Drive). A much more energetically efficient approach is to use the magnetic pressure generated by a pulsed power machine to directly drive an implosion. In this approach 5-10% of the stored energy can be converted to the implosion of a metal tube generally referred to as a “liner”. However, the implosion velocity is not very high 70-100 km/s and the convergence is cylindrical (rather than spherical) making it more difficult to achieve the high temperatures and areal densities needed for ignition.

Physics of Plasmas

Jones, Brent M.; Apruzese, J.P.; Harvey-Thompson, Adam J.; Ampleford, David A.; Jennings, C.A.; Hansen, Stephanie B.; Moore, Nathan W.; Lamppa, Derek C.; Johnson, Drew J.; Jones, Brent M.; Waisman, Eduardo M.; Coverdale, Christine A.; Cuneo, M.E.; Rochau, G.A.; Giuliani, J.L.; Thornhill, J.W.; Ouart, N.D.; Chong, Y.K.; Velikovich, A.L.; Dasgupta, A.; Krishnan, M.; Coleman, P.L.

Argon gas puffs have produced 330kJ ± 9% of x-ray radiation above 3keV photon energy in fast z-pinch implosions, with remarkably reproducible K-shell spectra and power pulses. This reproducibility in x-ray production is particularly significant in light of the variations in instability evolution observed between experiments. Soft x-ray power measurements and K-shell line ratios from a time-resolved spectrum at peak x-ray power suggest that plasma gradients in these high-mass pinches may limit the K-shell radiating mass, K-shell power, and K-shell yield from high-current gas puffs.

Harding, Eric H.; Ao, Tommy A.; Bailey, James E.; Shulenburger, Luke N.; Seagle, Christopher T.; Sinars, Daniel S.; Rochau, G.A.; Hansen, Stephanie B.; Loisel, Guillaume P.; Desjarlais, Michael P.; Lemke, Raymond W.

Abstract not provided.

ICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams

Gomez, Matthew R.; Slutz, S.A.; Sefkow, Adam B.; Awe, T.J.; Chandler, Gordon A.; Cuneo, M.E.; Geissel, Matthias G.; Hahn, K.D.; Hansen, Stephanie B.; Harding, Eric H.; Harvey-Thompson, Adam J.; Herrmann, Mark H.; Jennings, C.A.; Knapp, P.F.; Lamppa, Derek C.; Martin, M.R.; McBride, Ryan D.; Peterson, Kyle J.; Porter, J.L.; Rochau, G.A.; Rovang, Dean C.; Ruiz, Carlos L.; Schmit, Paul S.; Sinars, Daniel S.; Smith, Ian C.

Abstract not provided.

ICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams

Ouart, N.D.; Giuliani, J.L.; Dasgupta, A.; Petrov, G.M.; Safronova, A.S.; Kantsyrev, V.L.; Esaulov, A.A.; Shrestha, I.; Weller, M.E.; Shlyaptseva, V.; Schultz, K.; Stafford, A.; Cooper, M.; Ampleford, David A.; Hansen, Stephanie B.; Apruzese, J.P.; Clark, R.W.

Abstract not provided.

Hansen, Stephanie B.

Abstract not provided.

Jennings, Christopher A.; Gomez, Matthew R.; Hansen, Stephanie B.; Harding, Eric H.; McBride, Ryan D.; Sinars, Daniel S.; Awe, Thomas J.; Slutz, Stephen A.; Sefkow, Adam B.; Peterson, Kyle J.; Chittenden, J.P.C.

Abstract not provided.

Physical Review Letters

Gomez, Matthew R.; Jennings, Christopher A.; Awe, Thomas J.; Geissel, Matthias G.; Rovang, Dean C.; Chandler, Gordon A.; Cuneo, M.E.; Harvey-Thompson, Adam J.; Herrmann, Mark H.; Hess, Mark H.; Slutz, Stephen A.; Johns, Owen J.; Lamppa, Derek C.; Martin, Matthew; McBride, Ryan D.; Peterson, Kyle J.; Robertson, Grafton K.; Rochau, G.A.; Ruiz, Carlos L.; Savage, Mark E.; Sefkow, Adam B.; Smith, Ian C.; Stygar, William A.; Vesey, Roger A.; Sinars, Daniel S.; Hahn, Kelly D.; Hansen, Stephanie B.; Harding, Eric H.; Knapp, Patrick K.; Schmit, Paul S.

This Letter presents results from the first fully integrated experiments testing the magnetized liner inertial fusion concept [S.A. Slutz et al., Phys. Plasmas 17, 056303 (2010)], in which a cylinder of deuterium gas with a preimposed axial magnetic field of 10 T is heated by Z beamlet, a 2.5 kJ, 1 TW laser, and magnetically imploded by a 19 MA current with 100 ns rise time on the Z facility. Despite a predicted peak implosion velocity of only 70 km/s, the fuel reaches a stagnation temperature of approximately 3 keV, with T_e ≈ T_i, and produces up to 2e12 thermonuclear DD neutrons. In this study, X-ray emission indicates a hot fuel region with full width at half maximum ranging from 60 to 120 μm over a 6 mm height and lasting approximately 2 ns. The number of secondary deuterium-tritium neutrons observed was greater than 10¹⁰, indicating significant fuel magnetization given that the estimated radial areal density of the plasma is only 2 mg/cm².

Ao, Tommy A.; Harding, Eric H.; Bailey, James E.; Desjarlais, Michael P.; Hansen, Stephanie B.; Lemke, Raymond W.; Sinars, Daniel S.; Rochau, G.A.; Smith, Ian C.; Reneker, Joseph R.; Romero, Dustin H.; Benage, John F.; Golovkin, Igor G.; Gregori, G G.

Abstract not provided.

Loisel, Guillaume P.; Bailey, James E.; Rochau, G.A.; Hansen, Stephanie B.; Nagayama, Taisuke N.; Liedahl, D.L.; Mancini, R.M.; Koepke, M.K.

Abstract not provided.

Jones, Brent M.; Ruiz, Carlos L.; Chandler, Gordon A.; Hahn, Kelly D.; Fehl, David L.; Nelson, Alan J.; Torres, Jose A.; Coverdale, Christine A.; Lash, Joel S.; Knapp, Patrick K.; Gomez, Matthew R.; Hansen, Stephanie B.; Harding, Eric H.; McPherson, Leroy A.; Rochau, G.A.; Schmit, Paul S.; Sefkow, Adam B.; Sinars, Daniel S.; Cooper, Gary W.

Abstract not provided.

McBride, Ryan D.; Gomez, Matthew R.; Hansen, Stephanie B.; Jennings, Christopher A.; Bliss, David E.; Knapp, Patrick K.; Schmit, Paul S.; Awe, Thomas J.; Martin, Matthew; Sinars, Daniel S.; Greenly, John B.; Intrator, Tom P.; Weber, Tom E.

Abstract not provided.

Schmit, Paul S.; Knapp, Patrick K.; Hansen, Stephanie B.; Gomez, Matthew R.; Hahn, Kelly D.; Sinars, Daniel S.; Peterson, Kyle J.; Slutz, Stephen A.; Sefkow, Adam B.; Awe, Thomas J.; Harding, Eric H.; Jennings, Christopher A.

Abstract not provided.

Nature

Bailey, James E.; Nagayama, Taisuke N.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Gilleron, F.G.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; MacFarlane, J.J.M.; Mancini, R.C.M.; Orban, C.O.; Pain, J.-CP.; Pradhan, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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

Abstract not provided.

Ampleford, David A.; Hansen, Stephanie B.; Coverdale, Christine A.; Knapp, Patrick K.; Bell, Kate S.; Harper-Slaboszewicz, V.H.; McPherson, Leroy A.; Jones, Brent M.; Rochau, G.A.; Cuneo, M.E.

Abstract not provided.

Hansen, Stephanie B.

Abstract not provided.

Gomez, Matthew R.; Slutz, Stephen A.; Sefkow, Adam B.; Sinars, Daniel S.; Hahn, Kelly D.; Hansen, Stephanie B.; Harding, Eric H.; Knapp, Patrick K.; Schmit, Paul S.; Jennings, Christopher A.; Awe, Thomas J.; Geissel, Matthias G.; Rovang, Dean C.; Chandler, Gordon A.; Cuneo, M.E.; Harvey-Thompson, Adam J.; Herrmann, Mark H.; Lamppa, Derek C.; Martin, Matthew; McBride, Ryan D.; Peterson, Kyle J.; Porter, John L.; Rochau, G.A.; Ruiz, Carlos L.; Savage, Mark E.; Smith, Ian C.; Vesey, Roger A.

Abstract not provided.

Hansen, Stephanie B.

Abstract not provided.

Harvey-Thompson, Adam J.; Jennings, Christopher A.; Jones, Brent M.; Ampleford, David A.; Hansen, Stephanie B.; Lamppa, Derek C.; Cuneo, M.E.; Reneker, Joseph R.; Johnson, Drew J.; Jones, Michael J.; Moore, N.W.M.; Flanagan, Timothy M.; Mckenney, John M.; Rochau, G.A.; Waisman, E.M.W.; Coverdale, Christine A.; Thornhill, J.W.T.; Giuliani, J.L.G.; Chong, Y.K.C.; Velikovich, A.L.V.; Dasgupta, A.D.; Apruzese, J.P.A.

Abstract not provided.

Gomez, Matthew R.; Slutz, Stephen A.; Sefkow, Adam B.; Sinars, Daniel S.; Hahn, Kelly D.; Hansen, Stephanie B.; Harding, Eric H.; Knapp, Patrick K.; Schmit, Paul S.; Jennings, Christopher A.; Awe, Thomas J.; Geissel, Matthias G.; Rovang, Dean C.; Chandler, Gordon A.; Cuneo, M.E.; Harvey-Thompson, Adam J.; Herrmann, Mark H.; Lamppa, Derek C.; Martin, Matthew; McBride, Ryan D.; Peterson, Kyle J.; Porter, John L.; Rochau, G.A.; Ruiz, Carlos L.; Savage, Mark E.; Smith, Ian C.; Vesey, Roger A.

Abstract not provided.

Ampleford, David A.; Jennings, Christopher A.; Jones, Brent M.; Hansen, Stephanie B.; Lake, Patrick W.; Rochau, G.A.; Bailey, James E.; Dunham, Gregory S.; Cuneo, M.E.; Coverdale, Christine A.; Bernshtam, V.B.; Fisher, V.F.; Zarnitsky, Y.Z.; Starobinets, A.S.; Weingarten, L.W.; Doron, R.D.

Abstract not provided.

Awe, Thomas J.; Jennings, Christopher A.; McBride, Ryan D.; Cuneo, M.E.; Lamppa, Derek C.; Martin, Matthew; Rovang, Dean C.; Sinars, Daniel S.; Slutz, Stephen A.; Owen, Albert C.; Gomez, Matthew R.; Hansen, Stephanie B.; Harding, Eric H.; Herrmann, Mark H.; Jones, Michael J.; Knapp, Patrick K.; Mckenney, John M.; Peterson, Kyle J.; Robertson, Grafton K.; Rochau, G.A.; Savage, Mark E.; Schmit, Paul S.; Sefkow, Adam B.; Stygar, William A.; Vesey, Roger A.; Yu, Edmund Y.; Tomlinson, Kurt T.; Schroen, Diana G.

Abstract not provided.

Ampleford, David A.; Chittenden, J.P.C.; Appelbe, B.D.A.; Niasse, N.P.L.N.; Jennings, Christopher A.; Hansen, Stephanie B.

Abstract not provided.

Hansen, Stephanie B.; Rochau, G.A.; Harding, Eric H.; Ao, Tommy A.; Gomez, Matthew R.

Abstract not provided.