Zobrazeno 1 - 10
of 156
pro vyhledávání: '"John H. Gardner"'
Autor:
David T. Bell, John H. Gardner
Publikováno v:
Restoration Ecology. 15:S3-S10
Alcoa World Alumina Australia mines bauxite under lease agreements with the Government of Western Australia. The leases lie in the Darling Range to the east of Perth, the capital and major population center. In addition to bauxite and other mineral o
Autor:
Andrew S Parsons, John H Gardner
Publikováno v:
Journal American Society of Mining and Reclamation. 2006:660-670
Autor:
S.T. Zalesak, John H. Gardner, A. L. Velikovich, Denis Colombant, N. Metzler, David Fyfe, Andrew J. Schmitt
Publikováno v:
Physics of Plasmas. 11:2716-2722
Targets have been designed that produce moderate to high gain when directly driven by lasers. The intrinsic sensitivity of these targets to hydro instabilities is found using the FAST(2D) multidimensional radiation hydrocode [J. H. Gardner, A. J. Sch
Autor:
S. P. Obenschain, T.J. Tanaka, Elizabeth H. Stephens, J F Latkowski, Mark S. Tillack, Dale Welch, John Giuliani, J. Streit, Wayne R. Meier, Matthew Wolford, Robert R. Peterson, Farrokh Najmabadi, John H. Gardner, Gerald L. Kulcinski, Camille Bibeau, Craig L. Olson, Barry L. Freitas, Zoran Dragojlovic, L.J. Perkins, S.A. Payne, D. Geller, N. Ghoneim, D.T. Goodin, Robert Lehmberg, P. Kepple, D. Weidenheimer, S.B. Swanekamp, Timothy J. Renk, Gregory Rochau, James K. Hoffer, D. Haynes, Andrew J. Schmitt, Diana Grace Schroen, D. V. Rose, K. Skulina, A. Baraymian, Kathleen I. Schaffers, Raymond J. Beach, John D. Sethian, Lance Lewis Snead, R.W. Petzoldt, R. Raffray, G. Lucas, M.C. Myers, Moshe Friedman, Denis Colombant, Frank Hegeler
Publikováno v:
Nuclear Fusion. 43:1693-1709
A coordinated, focused effort is underway to develop Laser Inertial Fusion Energy. The key components are developed in concert with one another and the science and engineering issues are addressed concurrently. Recent advances include: target designs
Publikováno v:
Physics of Plasmas. 10:3270-3282
When a rippled surface of a planar target is irradiated with a short (subnanosecond) laser pulse, the shock wave launched into the target and the mass distribution of the shocked plasma will oscillate. These oscillations are found to be surprisingly
Autor:
N. Metzler, Max Karasik, A. N. Mostovych, S. P. Obenschain, Y. Aglitskiy, Victor Serlin, Andrew J. Schmitt, John H. Gardner, A. L. Velikovich
Publikováno v:
Physics of Plasmas. 10:1897-1905
A substantial reduction of the laser imprint with a short, low-energy “shaping” laser pulse incident upon a foam–plastic sandwich target prior to the main laser pulse has been demonstrated to be possible [Metzler et al., Phys. Plasmas 9, 5050 (
Publikováno v:
Physics of Plasmas. 9:5050-5058
In the previous work [Metzler et al., Phys. Plasmas 6, 3283 (1999)] it was shown that a tailored density profile could be very effective in smoothing out the laser beam nonuniformities imprinted into a laser-accelerated target. However, a target with
Autor:
S. P. Obenschain, Denis Colombant, Jill P. Dahlburg, Yefim Aglitskiy, Max Karasik, Lee Phillips, J.L. Weaver, Victor Serlin, Y. Chan, Andrew J. Schmitt, John H. Gardner, M. Klapisch, C. J. Pawley
Publikováno v:
Physics of Plasmas. 9:2234-2243
Experimental results and simulations that study the effects of thin metallic layers with high atomic number (high-Z) on the hydrodynamics of laser accelerated plastic targets are presented. These experiments employ a laser pulse with a low-intensity
Autor:
N. Metzler, S. P. Obenschain, A. L. Velikovich, Andrew J. Schmitt, C. J. Pawley, Max Karasik, John H. Gardner, A. N. Mostovych, Yefim Aglitskiy, Victor Serlin
Publikováno v:
Physics of Plasmas. 9:2264-2276
Perturbations that seed Rayleigh–Taylor (RT) instability in laser-driven targets form during the early-time period. This time includes a shock wave transit from the front to the rear surface of the target, and a rarefaction wave transit in the oppo
Autor:
Robert Lehmberg, Andrew J. Schmitt, Denis Colombant, S. P. Obenschain, John H. Gardner, Stephen E. Bodner
Publikováno v:
Fusion Engineering and Design. 60:93-98
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 fuel is surrounded by an ablator consisting of a low density CH foam filled with frozen DT. Th