Search Results - "Colombant, D."

Experimental evidence of impact ignition: 100-fold increase of neutron yield by impactor collision by Azechi, H, Sakaiya, T, Watari, T, Karasik, M, Saito, H, Ohtani, K, Takeda, K, Hosoda, H, Shiraga, H, Nakai, M, Shigemori, K, Fujioka, S, Murakami, M, Nagatomo, H, Johzaki, T, Gardner, J, Colombant, D G, Bates, J W, Velikovich, A L, Aglitskiy, Y, Weaver, J, Obenschain, S, Eliezer, S, Kodama, R, Norimatsu, T, Fujita, H, Mima, K, Kan, H

“…We performed integrated experiments on impact ignition, in which a portion of a deuterated polystyrene (CD) shell was accelerated to about 600 km/s and was…”
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Experimental benchmark for an improved simulation of absolute soft-X-ray emission from polystyrene targets irradiated with the nike laser by WEAVER, J. L, BUSQUET, M, COLOMBANT, D. G, MOSTOVYCH, A. N, FELDMAN, U, KLAPISCH, M, SEELY, J. F, BROWN, C, HOLLAND, G

“…Absolutely calibrated, time-resolved spectral intensity measurements of soft-x-ray emission (hnu approximately 0.1-1.0 keV) from laser-irradiated polystyrene…”
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Overview of new high gain target design for a laser fusion power plant by Bodner, S.E, Colombant, D.G, Schmitt, A.J, Gardner, J.H, Lehmberg, R.H, Obenschain, S.P

“…We have developed a new direct-drive target design that has a predicted energy gain of 127 using a 1.3 MJ KrF laser, and a gain of 155 using 3.1 MJ. The DT…”
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Quantum extension of Child-Langmuir law by LAU, Y. Y, CHERNIN, D, COLOMBANT, D. G, HO, P.-T

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Intense electron beam modulation by inductively loaded wide gaps for relativistic klystron amplifiers by Friedman, M, Serlin, V, V, Lampe, M, Hubbard, R, Colombant, D, Slinker, S

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Pinch spot formation in high atomic number z discharges by MOSHER, D, COLOMBANT, D

“…A nonlinear, quasi-two-dimensional model for pinch spot formation in radiation-dominated, high atomic number {ital z} pinches is presented that reproduces the…”
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Nonlinear beam loading and dynamical limiting currents in a high-power microwave gap by COLOMBANT, D. G, LAU, Y. Y

“…It is shown that the intense space charge of a high-current beam may increase the gap capacitance by a factor of 2 to 3 over the vacuum value. The limiting…”
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Increase in Rosseland mean opacity for inertial fusion hohlraum walls by Colombant, D., Klapisch, M., Bar-Shalom, A.

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Model of cavity coupling for beam breakup control by Colombant, D. G., Lau, Y. Y., Chemin, D.

“…The coupling of the accelerating cavities to dummy cavities was recently found to reduce beam breakup growth. This paper analyzes a more sophisticated model,…”
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Three-dimensional, nonlinear evolution of the Rayleigh-Taylor instability of a thin layer by COLOMBANT, D, MANHEIMER, W, OTT, E

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A Simple Model for Flashboard Plasma Expansion by Colombant, D. G., Weber, B. V.

“…A simple model for flashboard plasma expansion is presented. It is based on the j × B force and the fact that only a fraction a of the total current flows…”
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The Science and Technologies for Fusion Energy With Lasers and Direct-Drive Targets by Sethian, J. D., Colombant, D. G., Giuliani, J. L., Lehmberg, R. H., Myers, M. C., Obenschain, S. P., Schmitt, A. J., Weaver, J., Wolford, M. F., Hegeler, F., Friedman, M., Robson, A. E., Bayramian, A., Caird, J., Ebbers, C., Latkowski, J., Hogan, W., Meier, W. R., Perkins, L. J., Schaffers, K., Abdel Kahlik, S., Schoonover, K., Sadowski, D., Boehm, K., Carlson, L., Pulsifer, J., Najmabadi, F., Raffray, A. R., Tillack, M. S., Kulcinski, G., Blanchard, J. P., Heltemes, T., Ibrahim, A., Marriott, E., Moses, G., Radell, R., Sawan, M., Santarius, J., Sviatoslavsky, G., Zenobia, S., Ghoniem, N. M., Sharafat, S., El-Awady, J., Hu, Q., Duty, C., Leonard, K., Romanoski, G., Snead, L. L., Zinkle, S. J., Gentile, C., Parsells, W., Prinksi, C., Kozub, T., Dodson, T., Rose, D. V., Renk, T., Olson, C., Alexander, N., Bozek, A., Flint, G., Goodin, D. T., Hund, J., Paguio, R., Petzoldt, R. W., Schroen, D. G., Sheliak, J., Bernat, T., Bittner, D., Karnes, J., Petta, N., Streit, J., Geller, D., Hoffer, J. K., McGeoch, M. W., Glidden, S. C., Sanders, H., Weidenheimer, D., Morton, D., Smith, I. D., Bobecia, M., Harding, D., Lehecka, T., Gilliam, S. B., Gidcumb, S. M., Forsythe, D., Parikh, N. R., O'Dell, S., Gorensek, M.

“…We are carrying out a multidisciplinary multi-institutional program to develop the scientific and technical basis for inertial fusion energy (IFE) based on…”
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Direct drive acceleration of planar targets with the Nike KrF laser by Pawley, C.J, Sethian, J.D, Bodner, S.E, Gerber, K.A, Lehmberg, R.H, McLean, E.A, Mostovych, A.N, Obenschain, S.P, Serlin, V, Stamper, J.A, Colombant, D, Dahlburg, J.P, Schmitt, A.J, Gardner, J.H, Aglitskiy, Y, Chan, Y, Deniz, A.V, Lehecka, T, Brown, J, Seely, J, Klapisch, M

“…Nike is a multi-kilojoule KrF laser with very high beam uniformity (Δ I/ I<0.2% with all 36 overlapped beams), and the capability to accelerate relatively…”
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Improvements to the RADIOM non-LTE model by Busquet, M., Colombant, D., Klapisch, M., Fyfe, D., Gardner, J.

“…In 1993, we proposed the RADIOM model [M. Busquet, Phys. Fluids 85 (1993) 4191] where an ionization temperature T z is used to derive non-LTE properties from…”
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Thermal-Force Terms and Self-Generated Magnetic Fields in Laser-Produced Plasmas by Colombant, D. G., Winsor, N. K.

“…The several magnetic-source terms affecting laser-produced plasmas are presented, and their importance is discussed. The thermal force is shown to modify…”
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A Self-Similar Model for Conduction in the Plasma Erosion Opening Switch by Mosher, D., Grossmann, J. M., Ottinger, P. F., Colombant, D. G.

“…The conduction phase of the plasma erosion opening switch (PEOS) is characterized by combining a 1-D fluid model for plasma hydrodynamics, Maxwell's equations,…”
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Anode-plasma expansion in pinch-reflex diodes by COLOMBANT, D. G, GOLDSTEIN, S. A

“…Anode-plasma expansion in pinch-reflex diodes is investigated with use of a one-dimensional magnetohydrodynamic model. Early in time, the plasma undergoes…”
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Hydrodynamic Response of Plasma Channels to Propagating Ion Beams by Colombant, D. G., Goldstein, Shyke A., Mosher, D.

“…Hydrodynamic response of plasma channels induced by intense propagating ion beams is examined with use of both analytical estimates and a one-dimensional…”
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Maximum microwave conversion efficiency from a modulated intense relativistic electron beam by COLOMBANT, D. G, LAU, Y. Y

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Effects of frequency spreads on beam breakup instabilities in linear accelerators by Colombant, D. G., Lau, Y. Y.

“…Structure mode frequency spreads are shown to have a rather different influence on beam breakup growths than betatron frequency spreads. The present analytic…”
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