Search Results - "AMPLEFORD, D. J"

Performance Scaling in Magnetized Liner Inertial Fusion Experiments by Gomez, M. R., Slutz, S. A., Jennings, C. A., Ampleford, D. J., Weis, M. R., Myers, C. E., Yager-Elorriaga, D. A., Hahn, K. D., Hansen, S. B., Harding, E. C., Harvey-Thompson, A. J., Lamppa, D. C., Mangan, M., Knapp, P. F., Awe, T. J., Chandler, G. A., Cooper, G. W., Fein, J. R., Geissel, M., Glinsky, M. E., Lewis, W. E., Ruiz, C. L., Ruiz, D. E., Savage, M. E., Schmit, P. F., Smith, I. C., Styron, J. D., Porter, J. L., Jones, B., Mattsson, T. R., Peterson, K. J., Rochau, G. A., Sinars, D. B.

“…We present experimental results from the first systematic study of performance scaling with drive parameters for a magnetoinertial fusion concept. In…”
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Plasmoid Formation and Strong Radiative Cooling in a Driven Magnetic Reconnection Experiment by Datta, R, Chandler, K, Myers, C E, Chittenden, J P, Crilly, A J, Aragon, C, Ampleford, D J, Banasek, J T, Edens, A, Fox, W R, Hansen, S B, Harding, E C, Jennings, C A, Ji, H, Kuranz, C C, Lebedev, S V, Looker, Q, Patel, S G, Porwitzky, A, Shipley, G A, Uzdensky, D A, Yager-Elorriaga, D A, Hare, J D

“…We present the first experimental study of plasmoid formation in a magnetic reconnection layer undergoing rapid radiative cooling, a regime relevant to extreme…”
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Magnetic tower outflows from a radial wire array Z-pinch by Lebedev, S. V., Ciardi, A., Ampleford, D. J., Bland, S. N., Bott, S. C., Chittenden, J. P., Hall, G. N., Rapley, J., Jennings, C. A., Frank, A., Blackman, E. G., Lery, T.

“…We present the first results of high energy density laboratory astrophysics experiments which explore the evolution of collimated outflows and jets driven by a…”
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Curved Herbig-Haro Jets: Simulations and Experiments by Ciardi, A, Ampleford, D. J, Lebedev, S. V, Stehle, C

“…Herbig-Haro jets often show some degree of curvature along their path, in many cases produced by the ram pressure of a side wind. We present simulations of…”
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Novel beryllium-scintillator, neutron-fluence detector for magnetized liner inertial fusion experiments by Ruiz, C. L., Styron, J. D., Fehl, D. L., Hahn, K. D., McWatters, B., Mangan, M. A., Cooper, G. W., Vaughan, J. D., Chandler, G. A., Jones, B. M., Torres, J. A., Slutz, S. A., Ampleford, D. J., Gomez, M. R., Harding, E., Harvey-Thompson, A. J., Knapp, P. F.

“…Progress in the development of a neutron detector employing theBe9(n,α)6He(β−,τ1/2=807ms)reaction is reported. This detector’s intended use is to estimate…”
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Voltage measurements at the vacuum post-hole convolute of the Z pulsed-power accelerator by Waisman, E. M., McBride, R. D., Cuneo, M. E., Wenger, D. F., Fowler, W. E., Johnson, W. A., Basilio, L. I., Coats, R. S., Jennings, C. A., Sinars, D. B., Vesey, R. A., Jones, B., Ampleford, D. J., Lemke, R. W., Martin, M. R., Schrafel, P. C., Lewis, S. A., Moore, J. K., Savage, M. E., Stygar, W. A.

“…Presented are voltage measurements taken near the load region on the Z pulsed-power accelerator using an inductive voltage monitor (IVM). Specifically, the IVM…”
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Study of three-dimensional structure in wire-array Z pinches by controlled seeding of axial modulations in wire radius by JONES, B, DEENEY, C, BOTT, S. C, AMPLEFORD, D. J, PALMER, J. B. A, RAPLEY, J, HALL, G. N, OLIVER, B. V, MCKENNEY, J. L, GARASI, C. J, MEHLHORN, T. A, ROBINSON, A. C, WUNSCH, S. E, BLAND, S. N, LEBEDEV, S. V, CHITTENDEN, J. P

“…Three-dimensional perturbations have been seeded in wire-array z pinches by etching 15 microm diameter aluminum wires to introduce 20% modulations in radius…”
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Effect of radial-electric-field polarity on wire-array Z-pinch dynamics by BLAND, S. N, LEBEDEV, S. V, PALMER, J. B. A, CHITTENDEN, J. P, AMPLEFORD, D. J, BOTT, S. C, GOMEZ, J. A, HAINES, M. G, HALL, G. N, HAMMER, D. A, MITCHELL, I. H

“…The formation of plasma in wire-array Z-pinch experiments was found to depend upon the polarity of the radial-electric field near the wires. Reversing the…”
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Formation of Working Surfaces in Radiatively Cooled Laboratory Jets by Ampleford, D J, Lebedev, S V, Ciardi, A, Bland, S N, Bott, S C, Chittenden, J P, Hall, G, Jennings, C A, Armitage, J, Blyth, G, Christie, S, Rutland, L

“…Whilst observations provide many examples of collimated outflows or jets from astrophysical bodies, there remain unresolved questions relating to their…”
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Investigating the Formation and Scaling of Helical Structures in Axially Magnetized Magnetically Driven Implosions by Gomez, M. R., Weis, M. R., Adams, M. B., Awe, T. J., Hamlin, N. D., Jennings, C. A., Martin, M. R., Shipley, G. A., Woolstrum, J. M., Yager-Elorriaga, D. A., Yu, E. P., Shulenburger, L. N., Ampleford, D. J.

“…In magnetically driven cylindrical liner implosions, azimuthally correlated structures form due to the magneto-Rayleigh-Taylor instability. When an axial…”
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Investigation of high-temperature bright plasma X-ray sources produced in 5-MA X-pinch experiments by Sinars, D B, McBride, R D, Pikuz, S A, Shelkovenko, T A, Wenger, D F, Cuneo, M E, Yu, E P, Chittenden, J P, Harding, E C, Hansen, S B, Peyton, B P, Ampleford, D J, Jennings, C A

“…Using solid, machined X-pinch targets driven by currents rising from 0 to 5-6 MA in 60 ns, we observed bright spots of 5-9-keV continuum radiation from 5±2-μm…”
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Scaling of Efficient AR K-Shell Emission From Fast Gas-Puff Z-Pinches in the 10 to 100 MA Current Range by Tangri, V., Giuliani Voluntary Emeritus Program, J. L., Dasgupta, A., Velikovich, A. L., Ouart, N. D., Schaeuble, M.-A., Schwarz, J., Ampleford, D. J., Vesey, R. A., Jones, B.

“…Results of recent simulations of argon double-shell gas-puff Z-pinch implosions performed at NRL using MACH2-TCRE code are presented. This code was…”
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Continuum Hard-Photon K-Shell Yields from Z-Pinch Implosions: Present Status and Scaling to Higher Currents by Velikovich, A. L., Ouart, N. D., Dasgupta, A., Giuliani, J. L., Tangri, V., Harvey-Thompson, A. J., Schaeuble, M.-A., Schwarz, J., Myers, C. E., Ampleford, D. J., Vesey, R. A., Jones, B.

“…The use of the recombination continuum for x-ray radiation production in Z pinches has been discussed as an option 1 for generating high yields in the warm…”
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Planar wire-array Z-pinch implosion dynamics and X-ray scaling at multiple-MA drive currents for a compact multisource hohlraum configuration by Jones, B, Ampleford, D J, Vesey, R A, Cuneo, M E, Coverdale, C A, Waisman, E M, Jones, M C, Fowler, W E, Stygar, W A, Serrano, J D, Vigil, M P, Esaulov, A A, Kantsyrev, V L, Safronova, A S, Williamson, K M, Chuvatin, A S, Rudakov, L I

“…An indirect drive configuration is proposed wherein multiple compact Z-pinch x-ray sources surround a secondary hohlraum. Planar compact wire arrays allow…”
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Modeling Magnetic Tower Jets in the Laboratory by Ciardi, A, Lebedev, S V, Chittenden, J P, Ampleford, D J, Bland, S N, Bott, B S, Rapley, J

“…The twisting of magnetic fields threading an accretion system can lead to the generation on axis of toroidal field loops. As the magnetic pressure increases,…”
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Increased preheat energy to MagLIF targets with cryogenic cooling by Harvey-Thompson, A. J., Geissel, M., Crabtree, J. A., Weis, M. R., Gomez, M. R., Fein, J. R., Ampleford, D. J., Awe, T. J., Chandler, G. A., Galloway, B. R., Hansen, S. B., Hanson, J., Harding, E. C., Jennings, C. A., Kimmel, M., Knapp, P. F., Lamppa, D. C., Lewis, W. E., Mangan, M. A., Maurer, A., Perea, L., Peterson, K. J., Porter, J. L., Rambo, P. K., Robertson, G. K., Rochau, G. A., Ruiz, D. E., Shores, J. E., Slutz, S. A., Smith, I. C., Speas, C. S., Yager-Elorriaga, D. A., York, A., Paguio, R. R., Smith, G. E.

“…The performance of Magnetized Liner Inertial Fusion (MagLIF) experiments is sensitive to the amount of laser energy coupled to the fuel during the preheat…”
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Supersonic radiatively cooled rotating flows and jets in the laboratory by Ampleford, D J, Lebedev, S V, Ciardi, A, Bland, S N, Bott, S C, Hall, G N, Naz, N, Jennings, C A, Sherlock, M, Chittenden, J P, Palmer, J B A, Frank, A, Blackman, E

“…The first laboratory astrophysics experiments to produce a radiatively cooled plasma jet with dynamically significant angular momentum are discussed. A new…”
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Observation of >400-eV precursor plasmas from low-wire-number copper arrays at the 1-MA zebra facility by Coverdale, C A, Safronova, A S, Kantsyrev, V L, Ouart, N D, Esaulov, A A, Deeney, C, Williamson, K M, Osborne, G C, Shrestha, I, Ampleford, D J, Jones, B

“…Experiments with cylindrical copper wire arrays at the 1-MA Zebra facility show that high temperatures exist in the precursor plasmas formed when ablated wire…”
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Assessing Magnetized Liner Inertial Fusion Stagnation Conditions and Identifying Trends by Gomez, M. R., Slutz, S. A., Knapp, P. F., Hahn, K. D., Harding, E. C., Ampleford, D. J., Awe, T. J., Geissel, M., Hansen, S. B., Harvey-Thompson, A. J., Jennings, C. A., Myers, C. E., Peterson, K. J., Rochau, G. A., Sinars, D. B., Weis, M. R., Yager-Elorriaga, D. A.

“…Magnetized Liner Inertial Fusion (MagLIF) is a magneto-inertial fusion concept currently being investigated on Sandia's Z facility. In MagLIF an axial magnetic…”
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Characterization of Fine Metallic Wires for Wire-Array Z-Pinch Experiments by Killebrew, K. L., Maurer, A. J., Ampleford, D. J., Coverdale, C. A., Schroen, D., Holt, R. R., Rochau, G. A., Bailey, J. E., Jones, B., Savage, M. E., Graham, D. A.

“…The Z Facility at Sandia National Laboratories can produce >;2 MJ of X-ray energy with peak powers >;280 TW. Achieving optimal load performance requires the…”
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