Search Results - "Ives, H C"

Architecture of petawatt-class z -pinch accelerators by Stygar, W. A., Cuneo, M. E., Headley, D. I., Ives, H. C., Leeper, R. J., Mazarakis, M. G., Olson, C. L., Porter, J. L., Wagoner, T. C., Woodworth, J. R.

“…We have developed an accelerator architecture that can serve as the basis of the design of petawatt-class z-pinch drivers. The architecture has been applied to…”
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Water-dielectric-breakdown relation for the design of large-area multimegavolt pulsed-power systems by Stygar, W. A., Wagoner, T. C., Ives, H. C., Wallace, Z. R., Anaya, V., Corley, J. P., Cuneo, M. E., Harjes, H. C., Lott, J. A., Mowrer, G. R., Puetz, E. A., Thompson, T. A., Tripp, S. E., VanDevender, J. P., Woodworth, J. R.

“…We have developed an empirical electrical-breakdown relation that can be used to design large-area water-insulated pulsed-power systems. Such systems often…”
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Dielectric-breakdown tests of water at 6 MV by Stygar, W. A., Savage, M. E., Wagoner, T. C., Bennett, L. F., Corley, J. P., Donovan, G. L., Fehl, D. L., Ives, H. C., LeChien, K. R, Leifeste, G. T., Long, F. W., McKee, R. G., Mills, J. A., Moore, J. K., Ramirez, J. J., Stoltzfus, B. S., Struve, K. W., Woodworth, J. R.

“…We have conducted dielectric-breakdown tests on water subject to a single unipolar pulse. The peak voltages used for the tests range from 5.8 to 6.8 MV; the…”
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Analytic model of a magnetically insulated transmission line with collisional flow electrons by Stygar, W. A., Wagoner, T. C., Ives, H. C., Corcoran, P. A., Cuneo, M. E., Douglas, J. W., Gilliland, T. L., Mazarakis, M. G., Ramirez, J. J., Seamen, J. F., Seidel, D. B., Spielman, R. B.

“…We have developed a relativistic-fluid model of the flow-electron plasma in a steady-state one-dimensional magnetically insulated transmission line (MITL). The…”
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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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Optical and pressure diagnostics of 4-MV water switches in the Z-20 test Facility by Woodworth, J.R., Lehr, J.M., Elizondo-Decanini, J., Miller, P.A., Wakeland, P., Kincy, M., Garde, J., Aragon, B., Fowler, W., Mowrer, G., Maenchen, J.E., Sarkisov, G.S., Corley, J., Hodge, K., Drennan, S., Guthrie, D., Navarro, M., Johnson, D.L., Ives, H.C., Slattery, M.J., Muirhead, D.A.

“…We are studying the behavior of self-breaking, high-voltage water switches for the Z refurbishment project. In Z-20, three or four water switches in parallel…”
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Improved design of a high-voltage vacuum-insulator interface by Stygar, W. A., Lott, J. A., Wagoner, T. C., Anaya, V., Harjes, H. C., Ives, H. C., Wallace, Z. R., Mowrer, G. R., Shoup, R. W., Corley, J. P., Anderson, R. A., Vogtlin, G. E., Savage, M. E., Elizondo, J. M., Stoltzfus, B. S., Andercyk, D. M., Fehl, D. L., Jaramillo, T. F., Johnson, D. L., McDaniel, D. H., Muirhead, D. A., Radman, J. M., Ramirez, J. J., Ramirez, L. E., Spielman, R. B., Struve, K. W., Walsh, D. E., Walsh, E. D., Walsh, M. D.

“…We have conducted a series of experiments designed to measure the flashover strength of various azimuthally symmetric 45° vacuum-insulator configurations. The…”
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Measurement of the energy and power radiated by a pulsed blackbody x-ray source by Ives, H. C., Stygar, W. A., Fehl, D. L., Ramirez, L. E., Dropinski, S. C., Wall, D. L., Anctil, J. S., McGurn, J. S., Pyle, J. H., Hanson, D. L., Allison, B. N., Berninger, M. J., Bryce, E. A., Chandler, G. A., Cuneo, M. E., Fox, A. J., Gilliland, T. L., Haslett, C. L., Leeper, R. J., Lewis, D. F., Lucero, M. A., Mazarakis, M. G., McDaniel, D. H., McKenney, J. L., Mills, J. A., Mix, L. P., Porter, J. L., Ritchey, M. B., Ruggles, L. E., Seamen, J. F., Simpson, W. W., Spielman, R. B., Torres, J. A., Vargas, M. F., Wagoner, T. C., Warne, L. K., York, M. W.

“…We have developed a diagnostic system that measures the spectrally integrated (i.e. the total) energy and power radiated by a pulsed blackbody x-ray source…”
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Differential-output B -dot and D -dot monitors for current and voltage measurements on a 20-MA, 3-MV pulsed-power accelerator by Wagoner, T. C., Stygar, W. A., Ives, H. C., Gilliland, T. L., Spielman, R. B., Johnson, M. F., Reynolds, P. G., Moore, J. K., Mourning, R. L., Fehl, D. L., Androlewicz, K. E., Bailey, J. E., Broyles, R. S., Dinwoodie, T. A., Donovan, G. L., Dudley, M. E., Hahn, K. D., Kim, A. A., Lee, J. R., Leeper, R. J., Leifeste, G. T., Melville, J. A., Mills, J. A., Mix, L. P., Moore, W. B. S., Peyton, B. P., Porter, J. L., Rochau, G. A., Rochau, G. E., Savage, M. E., Seamen, J. F., Serrano, J. D., Sharpe, A. W., Shoup, R. W., Slopek, J. S., Speas, C. S., Struve, K. W., Van De Valde, D. M., Woodring, R. M.

“…We have developed a system of differential-output monitors that diagnose current and voltage in the vacuum section of a 20-MA 3-MV pulsed-power accelerator…”
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55-TW magnetically insulated transmission-line system: Design, simulations, and performance by Stygar, W. A., Corcoran, P. A., Ives, H. C., Spielman, R. B., Douglas, J. W., Whitney, B. A., Mostrom, M. A., Wagoner, T. C., Speas, C. S., Gilliland, T. L., Allshouse, G. A., Clark, R. E., Donovan, G. L., Hughes, T. P., Humphreys, D. R., Jaramillo, D. M., Johnson, M. F., Kellogg, J. W., Leeper, R. J., Long, F. W., Martin, T. H., Mulville, T. D., Pelock, M. D., Peyton, B. P., Poukey, J. W., Ramirez, J. J., Reynolds, P. G., Seamen, J. F., Seidel, D. B., Seth, A. P., Sharpe, A. W., Shoup, R. W., Smith, J. W., Van De Valde, D. M., Wavrik, R. W.

“…We describe herein a system of self-magnetically insulated vacuum transmission lines (MITLs) that operated successfully at 20 MA, 3 MV, and 55 TW. The system…”
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Theoretical z -pinch scaling relations for thermonuclear-fusion experiments by Stygar, W A, Cuneo, M E, Vesey, R A, Ives, H C, Mazarakis, M G, Chandler, G A, Fehl, D L, Leeper, R J, Matzen, M K, McDaniel, D H, McGurn, J S, McKenney, J L, Muron, D J, Olson, C L, Porter, J L, Ramirez, J J, Seamen, J F, Speas, C S, Spielman, R B, Struve, K W, Torres, J A, Waisman, E M, Wagoner, T C, Gilliland, T L

“…We have developed wire-array z -pinch scaling relations for plasma-physics and inertial-confinement-fusion (ICF) experiments. The relations can be applied to…”
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Flashover of a vacuum-insulator interface: A statistical model by Stygar, W. A., Ives, H. C., Wagoner, T. C., Lott, J. A., Anaya, V., Harjes, H. C., Corley, J. P., Shoup, R. W., Fehl, D. L., Mowrer, G. R., Wallace, Z. R., Anderson, R. A., Boyes, J. D., Douglas, J. W., Horry, M. L., Jaramillo, T. F., Johnson, D. L., Long, F. W., Martin, T. H., McDaniel, D. H., Milton, O., Mostrom, M. A., Muirhead, D. A., Mulville, T. D., Ramirez, J. J., Ramirez, L. E., Romero, T. M., Seamen, J. F., Smith, J. W., Speas, C. S., Spielman, R. B., Struve, K. W., Vogtlin, G. E., Walsh, D. E., Walsh, E. D., Walsh, M. D., Yamamoto, O.

“…We have developed a statistical model for the flashover of a 45° vacuum-insulator interface (such as would be found in an accelerator) subject to a pulsed…”
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X-ray emission from z pinches at 10 7 A: current scaling, gap closure, and shot-to-shot fluctuations by Stygar, W A, Ives, H C, Fehl, D L, Cuneo, M E, Mazarakis, M G, Bailey, J E, Bennett, G R, Bliss, D E, Chandler, G A, Leeper, R J, Matzen, M K, McDaniel, D H, McGurn, J S, McKenney, J L, Mix, L P, Muron, D J, Porter, J L, Ramirez, J J, Ruggles, L E, Seamen, J F, Simpson, W W, Speas, C S, Spielman, R B, Struve, K W, Torres, J A, Vesey, R A, Wagoner, T C, Gilliland, T L, Horry, M L, Jobe, D O, Lazier, S E, Mills, J A, Mulville, T D, Pyle, J H, Romero, T M, Seamen, J J, Smelser, R M

“…We have measured the x-ray power and energy radiated by a tungsten-wire-array z pinch as a function of the peak pinch current and the width of the…”
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The ZR refurbishment project by McDaniel, D.H., Mazarakis, M.G., Bliss, D.E., Elizondo, J.M., Harjes, H.C., Ives, H.C., Kitterman, D.L., Maenchen, J.E., Pointon, T.D., Rosenthal, S.E., Smith, D.L., Struve, K.W., Stygar, W.A., Weinbrecht, E.A., Johnson, D.L., Corley, J.P.

“…ZR is a refurbished (R) version of Z aiming to improve its overall performance, reliability, precision, pulse shape tailoring and reproducibility. Z, the…”
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Second-Order Effects in the Weibel Instability by Taggart, K. A., Godrey, B. B., Rhoades, C. E., Ives, H. C.

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High-voltage hold-off of large surface area metal electrodes with dielectric surface layers by Johnson, D.J., Ives, H.C., Savage, M.E., Stygar, W.A.

“…Aluminum and stainless steel electrodes with dielectric surface layers have been tested for the avoidance of electron emission and plasma induced arcs that…”
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Effect of self-magnetic field on large pulsed insulators operated at 4 megavolts and 5 megaamperes by Savage, M.E., Stygar, W.A., Elizondo, J.M., Ives, H.C., Shoup, W., Struve, K.W., McDaniel, D.H.

“…Experiments on a large, high voltage pulsed insulator will be described. The goal was investigation of the effect of the self-magnetic field associated with…”
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PBFA-Z vacuum section design using TLCODE simulations by Corcoran, P.A., Douglas, J.W., Smith, I.D., Spence, P.W., Stygar, W.A., Struve, K.W., Martin, T.H., Spielman, R.B., Ives, H.C.

“…Circuit code simulations were used to predict the performance of and to assess design trade-offs for the vacuum section of PBFA-Z. PBFA-Z was designed to drive…”
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Engineering design of the Z magnetically-insulated transmission lines and insulator stack by Ives, H.C., van de Valde, D.M., Long, F.W., Smith, J.W., Spielman, R.B., Stygar, W.A., Wavrik, R.W., Shoup, R.W.

“…A 3.3 m diameter cylindrical insulator stack and a set of 3 m diameter conical magnetically-insulated transmission lines (MITLs) were built for the Z…”
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D-dot and B-dot monitors for Z-vacuum section power-flow measurements by Stygar, W.A., Spielman, R.B., Ives, H.C., Moore, W.B.S., Seamen, J.F., Sharpe, A.W., Wagoner, T.C., Gilliland, T.L., Broyles, R.S., Mills, J.A., Dinwoodie, T.A., Slopek, J.S., Struve, K.W., Reynolds, P.G.

“…New differential D-dot and B-dot monitors were developed for the Z vacuum section of an accelerator pulsed power supply. The D-dots measure voltage at the…”
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