Search Results - "Schumer, J"

A Primer on Pulsed Power and Linear Transformer Drivers for High Energy Density Physics Applications by McBride, R. D., Stygar, W. A., Cuneo, M. E., Sinars, D. B., Mazarakis, M. G., Leckbee, J. J., Savage, M. E., Hutsel, B. T., Douglass, J. D., Kiefer, M. L., Oliver, B. V., Laity, G. R., Gomez, M. R., Yager-Elorriaga, D. A., Patel, S. G., Kovalchuk, B. M., Kim, A. A., Gourdain, P.-A., Bland, S. N., Portillo, S., Bott-Suzuki, S. C., Beg, F. N., Maron, Y., Spielman, R. B., Rose, D. V., Welch, D. R., Zier, J. C., Schumer, J. W., Greenly, J. B., Covington, A. M., Steiner, A. M., Campbell, P. C., Miller, S. M., Woolstrum, J. M., Ramey, N. B., Shah, A. P., Sporer, B. J., Jordan, N. M., Lau, Y. Y., Gilgenbach, R. M.

“…The objectives of this tutorial are as follows: 1) to help students and researchers develop a basic understanding of how pulsed-power systems are used to…”
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A 1-D Model for the Millimeter-Wave Absorption and Heating of Dielectric Materials in Power Beaming Applications by Rittersdorf, Ian M., Hoff, B. W., Richardson, A. S., Martin, S. A., Yakovlev, V. V., Kim, P. S., Schumer, J. W.

“…A heat exchanger, based on a millimeter-wave absorbing ceramic composite, is under development. This article describes a 1-D finite-difference model that is…”
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Simulations of the generation and transport of a 5 MV end-point x-ray beam on a pulsed power generator by Richardson, A. S., Zier, J. C., Engelbrecht, J. T., Swanekamp, S. B., Schumer, J. W., Mosher, D., Ottinger, P. F., Duke, D. L., Haines, T. J., McCumber, M. P., Gehring, A.

“…An experimental campaign was recently completed at the U.S. Naval Research Laboratory’s Mercury pulsed-power facility, where the feasibility of using a 5 MV…”
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An Analysis of Intense Pulsed Active Detection (IPAD) for the Detection of Special Nuclear Materials by Swanekamp, S. B., Apruzese, J. P., Commisso, R. J., Mosher, D., Schumer, J. W.

“…We propose and analyze computationally the Intense Pulsed Active Detection (IPAD) of fissile materials. This approach employs bremsstrahlung photons from a…”
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High-power, photofission-inducing bremsstrahlung source for intense pulsed active detection of fissile material by Zier, J. C., Mosher, D., Allen, R. J., Commisso, R. J., Cooperstein, G., Hinshelwood, D. D., Jackson, S. L., Murphy, D. P., Ottinger, P. F., Richardson, A. S., Schumer, J. W., Swanekamp, S. B., Weber, B. V.

“…Intense pulsed active detection (IPAD) is a promising technique for detecting fissile material to prevent the proliferation of special nuclear materials. With…”
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Particle-in-Cell Simulations of ION Dynamics in a Pinched-Beam Diode1 by Foster, J. C., Swanekamp, S. B., Hinshelwood, D. D., Richardson, A. S., Adamson, P. E., Schumer, J. W., Ottinger, P. F., Mosher, D.

“…A pinched-beam diode consists of a thin annular cathode which emits electrons that are accelerated toward a planar anode. Once the energy deposited by the…”
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Effect of Initial Conditions on Charged Particle Acceleration in a Dense Plasma Focus by Jackson, S. L., Engelbrecht, J. T., Beresnyak, A. R., Mamonau, A.A., Petkov, E. E., Richardson, A. S., Allen, R. J., Boyer, C. N., Giuliani, J. L., Schumer, J. W., Klir, D., Rezac, K., Cikhardt, J., Maron, Y., Stambulchik, E., Roark, Christine, Stoltz, Peter H., Spirkin, Anton, Luginsland, J. W.

“…Charged particle acceleration has been investigated in a dense plasma focus (DPF) driven by the Hawk pulsed-power generator at the Naval Research Laboratory…”
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Measurements of Early-Time Plasma Evolution in the Hawk Dense Plasma Focus by Engelbrecht, J. T., Jackson, S.L., Richardson, A. S., Beresnyak, A., Weber, B. V., Giuliani, J. L., Rittersdorf, I. M., Schumer, J. W., Klir, D., Rezac, K., Cikhardt, J., Maron, Y., Stambulchik, E.

“…The 650 kA Hawk pulsed power generator at NRL has been configured as a fast (1.2 μs), high in ductance (607 nH) driver for a dense plasma focus load. The…”
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Modeling of the Hawk Dense Plasma Focus (DPF) Device Using USIM by Roark, Christine M., Stoltz, Peter H., Spirkin, Anton, Luginsland, J. W., Jackson, S. L., Giuliani, J. L., Engelbrecht, J. T., Rittersdorf, Ian M., Richardson, A. Stephen, Schumer, J. W.

“…We compare MHD simulation results to experimental measurements taken from a dense plasma focus driven by the HAWK pulsed-power generator (0.65 MA peak current,…”
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Initial Results from a Dense Plasma Focus Driven by a High-Inductance Generator by Jackson, S. L., Engelbrecht, J. T., Richardson, A. S., Bcrcsnyak, A., Weber, B. V., Giuliani, J. L., Rittersdorf, I. M., Schumer, J. W., Klir, D., Rezac, K., Cikhardt, J., Maron, Y., Stambulchik, E., Roark, Christine, Stoltz, Peter H., Spirkin, Anton, Luginsland, J. W.

“…The Naval Research Laboratory's Hawk pulsed power generator is being used to drive a dense plasma focus (DPF) in order to study the phenomenon of charged…”
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Effect of emission models on particle-in-cell simulations of a large-area bremsstrahlung diode operating at 5 MV with comparison to experimentally measured dose by Richardson, A. S., Zier, J. C., Jackson, S. L., Schumer, J. W., Mosher, D., Duke, D., Haines, T., Archuleta, T., Boswell, M., Espy, M., Gehring, A., Herrmann, H., Johnson, C., Kim, Y., McCumber, M., Meaney, K., White, B., Smith, J., Baker, S., Droemer, D., Corredor, A., Fegenbush, L., Gall, B., Heika, M., Flores, P., Kruschwitz, C., Montoya, K. Brown, Wolfe, D., Ormond, E.

“…Recent experiments on the Mercury pulsed power accelerator were performed with a large-area bremsstrahlung diode operated at 5 MV. Extensive measurements of…”
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Hyaluronidase as additive to induction chemotherapy in advanced squamous cell carcinoma of the head and neck by Klocker, J, Sabitzer, H, Raunik, W, Wieser, S, Schumer, J

“…Forty-eight patients with advanced head and neck tumours were treated with irradiation and concomitant chemotherapy with cisplatin, vindesine and…”
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Detectors for intense, pulsed active detection by Jackson, S L, Allen, R J, Apruzese, J P, Commisso, R J, Hinshelwood, D D, Mosher, D, Murphy, D P, Ottinger, P F, Schumer, J W, Swanekamp, S B, Young, F C, Cooperstein, G, Hunt, A W, Seipel, H A, Gagliardi, M A

“…In intense, pulsed active detection, a single, intense pulse of radiation is used to induce photofission in fissionable material, increasing its detectability…”
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Evaluation of self-magnetically pinched diodes up to 10 MV as high-resolution flash X-ray sources by Swanekamp, S.B., Cooperstein, G., Schumer, J.W., Mosher, D., Young, F.C., Ottinger, P.F., Commisso, R.J.

“…The merits of several high-resolution, pulsed-power-driven, flash X-ray sources are examined with numerical simulation for voltages up to 10 MV. The charged…”
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Initial conditions in the hawk dense plasma focus by Engelbrecht, J. T., Schumer, J. W., Jackson, S. L., Mamonau, A. A., Beresnyak, A. R., Rezac, K., Cikhardt, J., Klir, D., Weber, B. V., Giuliani, J. L.

“…The 670 kA Hawk pulsed power generator at NRL has been configured as a fast (1.2 µs rise time), high inductance (607 nH) driver for a dynamic dense plasma…”
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The Nidek MK-2000 microkeratome system by Schumer, D J, Bains, H S

“…To assess flap thickness and the performance of the Nidek MK-2000 microkeratome during laser in situ keratomileusis (LASIK). Three hundred seventy consecutive…”
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Modeling nitrogen plasmas produced by intense electron beams by Angus, J. R., Swanekamp, S. B., Schumer, J. W., Mosher, D., Ottinger, P. F.

“…The Gamble II generator at the Naval Research Laboratory produces ∼100 ns pulse duration, relativistic-electron beams with peak energies on the order of 1MV…”
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2D simulations of hall-driven magnetic field penetration in electron-magnetohydrodynamics by Richardson, A. S., Angus, J. R., Swanekamp, S. B., Schumer, J. W., Ottinger, P. F.

“…Magnetic field penetration in electron-magneto-hydrodynamics (EMHD) can be driven by density gradients through the Hall term. Here we describe the effect of…”
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Pulsed vacuum breakdown measurements with a 1-MV generator by Allen, R. J., Hinshelwood, D. D., Schumer, J. W., Rittersdorf, I. M., Jackson, S. L., Ottinger, P. F.

“…Measurements of the breakdown field of vacuum gaps have been made with a 1-MV, 50-ns test stand [1]. The first set of experiments was performed with planar,…”
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Effects of pulsed anode heating on self-magnetic-pinch radiographic performance using NRL's Mercury IVA by Zier, J. C., Weber, B. V., Boyer, C., Cooperstein, G., Hinshelwood, D. D., Richardson, A. S., Rittersdorf, I. M., Schumer, J. W., Swanekamp, S. B.

“…Summary form only given. Previous proof-of-principle experiments at NRL used the Mercury IVA facility to test a self-magnetic-pinch (SMP) diode in conjunction…”
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