Zobrazeno 1 - 10
of 59
pro vyhledávání: '"L.J. Lorence"'
Publikováno v:
Nuclear Science and Engineering. 142:270-291
A novel approach is proposed for charged particle transport calculations using a recently developed second-order, self-adjoint angular flux (SAAF) form of the Boltzmann transport equation with continuous slowing-down. A finite element discretization
Publikováno v:
IEEE Transactions on Nuclear Science. 43:2724-2730
The MITS multigroup/continuous-energy electron-photon Monte Carlo transport code system has matured to the point that it is capable of addressing more realistic three-dimensional adjoint applications. It is first employed to efficiently predict point
Publikováno v:
Nuclear Science and Engineering. 124:369-389
A hybrid multigroup/continuous-energy Monte Carlo algorithm is developed for solving the Boltzmann-Fokker-Planck equation. This algorithm differs significantly from previous charged-particle Monte Carlo algorithms. Most importantly, it can be used to
Publikováno v:
IEEE Transactions on Nuclear Science. 40:664-668
The Time Projection Compton Spectrometer (TPCS) has previously been used with a 12.7- mu m-thick polypropylene target to measure the time-integrated energy spectrum of intense flash X-ray sources. In the present work, the authors investigated the app
Autor:
P. J. Griffin, W. H. McAtee, L.J. Lorence, T. W. L. Sanford, John A. Halbleib, J.G. Kelly, J. W. Poukey, R. C. Mock
Publikováno v:
Nuclear Science and Engineering. 114:190-213
An intense reusable source of pulsed photoneutrons has been developed that produces about 0.5 or 1.0 {times} 10{sup 14} neutrons in a {approximately}15 ns pulse from natural lead or depleted uranium, respectively, on the HERMES Ill electron accelerat
Autor:
J.G. Kelly, J. W. Poukey, P. J. Griffin, T. W. L. Sanford, L.J. Lorence, R. C. Mock, J.A. Halbleib, K. A. Mikkelson, W. H. McAtee
Publikováno v:
Review of Scientific Instruments. 63:4795-4798
Four monitoring techniques that can determine peak voltage (Vp) to a precision of ∼5% for high‐intensity, pulsed electron accelerators operating in the 10 to 20 MV range are discussed and applied to the 14‐TW HERMES III accelerator. The techniq
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 62:264-274
Three models of a differential absorption spectrometer have been developed for determining the photon spectra of bremsstrahlung sources whose endpoints vary from ∼ 150 to 2000 keV. Spectral data are unfolded from dose-depth measurements using an it
Publikováno v:
IEEE Transactions on Nuclear Science. 38:1171-1179
The relationship between dose in TLDs and dose in packaged microelectronic devices as a function of electron beam energy is calculated using the CEPXS/ONELD radiation transport code. The effects of adjacent materials, including TLDs, upon the energy
Autor:
J. D. Boyes, Regan W. Stinnett, G.O. Allshouse, D.L. Johnson, J.W. Powers, T. W. L. Sanford, M.E. Cuneo Sandia, J.J. Ramirez, Robert R. Peterson, V. Harper-Slaboszewicz, K.R. Prestwich, R.L. Engelstad, Thomas Alan Mehlhorn, Mohamed E. Sawan, David Lester Hanson, M.J. Clauser, Edward G. Lovell, Craig L. Olson, L.J. Lorence, H.Y. Khater, Gregory A. Moses
Publikováno v:
Fusion Technology. 19:664-668
The Laboratory Microfusion Facility (LMF) is being planned to develop high-grain, high-yield (200 MJ-1000 MJ) ICF targets for applications to nuclear weapons effects simulation, thermonuclear weapons physics, and energy production. It is expected tha
Publikováno v:
IEEE Transactions on Nuclear Science. 37:1560-1563
Thermoluminescent dosimeters (TDLs) fabricated by embedding CaF/sub 2/:Mn powder in a Teflon matrix (TTLDs) are sometimes used to monitor dose in silicon-device radiation effects experiments. A potential advantage of TTLDs over other types of TLDs fo