Search Results - "Frese, M. H."

Energy loss to conductors operated at lineal current densities ≤ 10     MA / cm : Semianalytic model, magnetohydrodynamic simulations, and experiment by Stygar, W. A., Rosenthal, S. E., Ives, H. C., Wagoner, T. C., Allshouse, G. O., Androlewicz, K. E., Donovan, G. L., Fehl, D. L., Frese, M. H., Gilliland, T. L., Johnson, M. F., Mills, J. A., Reisman, D. B., Reynolds, P. G., Speas, C. S., Spielman, R. B., Struve, K. W., Toor, A., Waisman, E. M.

“…We have developed a semianalytic expression for the total energy loss to a vacuum transmission-line electrode operated at high lineal current densities. (We…”
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Three-dimensional particle-in-cell simulations of rapid start-up in strapped oven magnetrons due to variation in the insulating magnetic field by Luginsland, J. W., Lau, Y. Y., Neculaes, V. B., Gilgenbach, R. M., Jones, M. C., Frese, M. H., Watrous, J. J.

“…A three-dimensional parallel particle-in-cell code, ICEPIC, is used to simulate the geometry and the magnetic field profiles of the recent low-noise, fast…”
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The Challenge of Wall–Plasma Interaction with Pulsed Megagauss Magnetic Fields by Siemon, R. E., Bauer, B. S., Awe, T. J., Angelova, M. A., Fuelling, S., Goodrich, T., Lindemuth, I. R., Makhin, V., Atchison, W. L., Faehl, R. J., Reinovsky, R. E., Turchi, P. J., Degnan, J. H., Ruden, E. L., Frese, M. H., Garanin, S. F., Mokhov, V. N.

“…A method is described for choosing experimental parameters in studies of high-energy-density (HED) physics relevant to fusion energy, as well as other…”
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MHD modeling of conductors at ultrahigh current density by Rosenthal, S.E., Desjarlais, M.P., Spielman, R.B., Stygar, W.A., Asay, J.R., Douglas, M.R., Hall, C.A., Frese, M.H., Morse, R.L., Reisman, D.B.

“…In conjunction with ongoing high-current experiments on Sandia National Laboratories' Z accelerator (Albuquerque, NM) we have revisited a problem first…”
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Simulations of a Plasma Flow Switch by Buff, J., Frese, M. H., Giancola, A. J., Peterkin, R. E., Roderick, N. F.

“…In a portion of the experimental program using the SHIVA Star capacitor bank at the Air Force Weapons Laboratory (AFWL), a cylindrical foil load is imploded…”
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Results from compression of field reversed configuration using imploding solid liner by Degnan, J. H., Grabowski, C., Domonkos, M., Ruden, E. L., Amdahl, D. J., Frese, M. H., Frese, S. D., Wurden, G. A., Weber, T. E.

“…The AFRL Shiva Star capacitor bank (1300 μΡ, up to 120 kV) used typically at 4 to 5 MJ stored energy, 10 to 15 MA current, 10 μs current rise time, has been…”
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Enhancement of the radiation yield, in plasma flow switch experiments by Buff, J., Peterkin, R.E., Roderick, N.F., Degnan, J.H., Frese, M.H., Turchi, P.J.

“…The Shiva Star fast capacitor bank, an inductive store, and a plasma flow switch were used to deliver multimegaampere currents with submicrosecond rise times…”
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Computational simulation of initiation and implosion of circular arrays of wires in two and three dimensions by Frese, M.H., Frese, S.D., Rosenthal, S.E., Douglas, M.R., Roderick, N.F.

“…We have performed realistic two-dimensional (2-D) r-/spl theta/ resistive MHD simulations of high-current aluminum wire array initiation and implosion. These…”
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Three-dimensional MHD simulations of a plasma opening switch by Makhin, V., Frese, M. H.

“…Summary form only given. Pulsed power sources such as fast capacitor banks and flux compression generators can deliver tens of mega-amperes of current but…”
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Theta-pinch preionization and trapped flux in FRC formation by Frese, S. D., Frese, M. H.

“…Summary form only given. It is well known that it is desirable to increase trapped flux in Field Reversed Configurations (FRCs) to increase both temperature…”
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The internal structure and dynamics of the railgun plasma armature between infinitely wide ablating rails by Frese, M.H.

“…Computer simulations of the plasma flow in two-dimensionally symmetric railgun plasma arcs were performed. The direction of symmetry is normal to the insulator…”
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Review of Some Plasma Gun Techniques for Fusion at Megagauss Energy Densities by Turchi, Peter J, Roderick, Norman F, Degnan, James H, Frese, Michael H, Amdahl, David J

“…Plasma guns offer opportunities to generate and direct plasma flows at high energy density. Typically, such guns comprise coaxial electrodes that are connected…”
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Experimental and Computational Progress on Liner Implosions for Compression of FRCs by Degnan, J.H., Amdahl, D.J., Brown, A., Cavazos, T., Coffey, S.K., Domonkos, M.T., Frese, M.H., Frese, S.D., Gale, D.G., Grabowski, T.C., Intrator, T.P., Kirkpatrick, R.C., Kiuttu, G.F., Lehr, F.M., Letterio, J.D., Parker, J.V., Peterkin, R.E., Roderick, N.F., Ruden, E.L., Siemon, R.E., Sommars, W., Tucker, W., Turchi, P.J., Wurden, G.A.

“…Magnetized target fusion (MTF) is a means to compress plasmas to fusion conditions that uses magnetic fields to greatly reduce electron thermal conduction,…”
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Preparation and Liner Compression of Plasma From an Ultrahigh Speed Flow by Turchi, P.J., Roderick, N.F., Degnan, J.H., Frese, M.H., Amdahl, D.J.

“…Preparation of the target plasma represents a critical issue in liner compression techniques to achieve fusion conditions. We consider the use of an ultrahigh…”
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PPPS-2013: Addressing short trapped-flux lifetime in high-density field-reversed configuration plasmas in FRCHX by Grabowski, C., Degnan, J. H., Amdahl, D. J., Domonkos, M., Ruden, E. L., White, W., Wurden, G. A., Intrator, T. P., Waganaar, W. J., Weber, T., Frese, M. H., Frese, S. D., Camacho, J. F., Coffey, S. K., Kiuttu, G. F., Kostora, M., McCullough, J., Sommars, W., Lynn, A. G., Yates, K., Bauer, B. S., Fuelling, S., Siemon, R. E.

“…Summary form only given. The objective of the Field-Reversed Configuration Heating Experiment (FRCHX) is to obtain a better understanding of the fundamental…”
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Computational determination of diagnostic signatures of deleterious effects in FRCs undergoing liner compression by Frese, M.H., Frese, S.D., Makhin, V.

“…A variety of plasma diagnostics will be fielded in experiments at the Air Force Research Laboratory to form, translate, and compress a field reversed plasma…”
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Plasma formation in MHD simulations of the UNR Megagauss Experiment using MACH2 by Frese, M.H., Frese, S.D., Makhin, V.

“…Summary form only given. In the University of Nevada Reno Megagauss Experiment small rods with diameters near 1 mm were driven by the Zebra pulser resulting in…”
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Field-reversed configuration formation for high energy density plasma experiments by Wurden, G. A., Intrator, T. P., Sears, J. A., Weber, T., Grabowski, T. C., Degnan, J. H., Amdahl, D. J., Domonkos, M. T., Ruden, E. L., White, W. M., Gale, D. G., Kostora, M. R., McCullough, J., Sommars, W., Frese, M. H., Frese, S. D., Camacho, J. F., Coffey, S. K., Kiuttu, G. F., Fueling, S. R., Bauer, B. S., Lynn, A. G.

“…Summary form only given. The Field-Reversed Configuration Heating Experiment (FRCHX) is a collaborative experiment between the Air Force Research Laboratory…”
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Heating of the inner surface of an imploding liner compressing megagauss magnetic field by Makhin, V., Frese, M.H., Frese, S.D., Ruden, E.L.

“…Summary form only given. In experiments at the Air Force Research Laboratory to form, translate, and compress a field reversed plasma configuration (FRC) with…”
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MHD simulation of preionization dynamics in FRC formation by Makhin, V., Frese, M.H., Frese, S.D., Ruden, E.L.

“…Summary form only given. In experiments at the Air Force Research Laboratory to form, translate, and compress a field reversed plasma configuration (FRC), the…”
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