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Second-Harmonic Generation from Sub-Monolayer Molecular Adsorbates Using a C-W Diode Laser: Maui Surface Experiment

Description: Optical second-harmonic generation (SHG) can be an extremely sensitive tool for surface studies. The technique is capable of probing adsorbed molecules at various interfaces. It is based on the idea that SHG is forbidden in a medium with inversion symmetry, but necessarily allowed at a surface. To see such a surface nonlinear optical effect, high laser intensity is often needed. Thus, in the experiments reported so far, pulsed lasers were used exclusively. From the consideration for practical a… more
Date: June 1, 1985
Creator: Boyd, G. T.; Shen, Y. R. & Hansch, T. W.
Item Type: Refine your search to only Article
open access

Effects of magnetic non-linearities on a stored proton beam and their implications for superconducting storage rings

Description: A nonlinear lens may be used to study the effect of high-order multipolar field imperfections on a stored proton beam. Such a nonlinear lens is particulary suitable to simulate field imperfections of the types encountered in coil dominated superconducting magnets. We have studied experimentally at the SPS the effect of high order (5th and 8th) single isolated resonances driven by the nonlinear lens. The width of these resonances is of the order one expects to be caused by field errors in superc… more
Date: June 1, 1985
Creator: Cornacchia, M. & Evans, L.
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open access

Spatially-resolved investigation of transport in semiconductors: a photothermal deflection approach

Description: The unique ability of photothermal deflection spectroscopy to probe the local index of refraction of matter is exploited to investigate, in a spatially-resolved manner, thermal and electronic transport in semiconductors. An added advantage of this approach is that it is contactless; hence, it obviates the classical problems associated with electrodes and contacts. The basic premise of the technique is the use of the heat associated with non-radiative processes (e.g., recombination of carriers) … more
Date: June 1, 1985
Creator: Skumanich, A.; Fournier, D.; Boccara, A.C. & Amer, N.M.
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open access

Mechanistic modeling of Zircaloy deformation and fracture in fuel element analysis

Description: A review is given of the comprehensive model developed in the 1960's at the Bettis Atomic Power Laboratory to explain the creep of Zircaloy during neutron irradiation and applied to fuel element analysis and design. The in-pile softening observed at low stresses was hypothesized to be due to a combination of the growth-directed Roberts-Cottrell yielding creep originally proposed for ..cap alpha..-uranium and the formation of point defect loops preferentially on certain planes in response to the… more
Date: June 1, 1985
Creator: Nichols, F.A.
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open access

Experience on fuel and structural materials development in the USA

Description: The United States has conducted extensive LMFBR fuel and structural materials development programs since the mid-1960's. Fuels and materials irradiation tests conducted in EBR-II formed the basis for evaluating the expected performance of FFTF fuel and identified candidate fuels and materials for further full-scale testing in FFTF. The performance of FFTF fuel through the first three years of reactor operation (700 EFPD) has been outstanding. Peak fuel burnup has been limited by swelling of the… more
Date: June 1, 1985
Creator: Laidler, J. J. & Last, G. A.
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open access

Considerations for application of Si(Li) detectors in analyses of sub-keV, ion-induced x rays

Description: Spectroscopy of ion-induced x rays is commonly performed using lithium-drifted, silicon detectors, Si(Li), with beryllium windows. Strong absorption of x rays with energies below 1 keV occurs in even the thinnest commercially available beryllium windows and precludes useful analysis of sub-keV x rays. Access to the sub-keV x ray region can be achieved using windowless (WL) and ultra-thin-windowed (UTW) Si(Li) detectors. These detectors have been shown to be useful for spectroscopy of x rays wit… more
Date: June 19, 1985
Creator: Musket, R.G.
Item Type: Refine your search to only Article
open access

General analysis of the chiral phase transition

Description: The universality classes applicable to the chiral phase transition are studied. The epsilon-expansion predicts that the chiral transition should always be of first order for three or more flavors. If fluctuations with topological charge evaporate at temperatures well below the chiral transition point, a new phase of hadronic matter could occur, one in which there would be massive violations of isospin. 20 refs., 5 figs.
Date: June 1, 1985
Creator: Pisarski, Robert D.
Item Type: Refine your search to only Article
open access

White River Falls Fish Passage Project, Tygh Valley, Oregon: Final Technical Report, Volume 3. Appendix B, Fisheries Report; Appendix C, Engineering Alternative Evaluation; Appendix D, Benefit/Cost Analysis.

Description: Studies were conducted to describe current habitat conditions in the White River basin above White River Falls and to evaluate the potential to produce anadromous fish. An inventory of spawning and rearing habitats, irrigation diversions, and enhancement opportunities for anadromous fish in the White River drainage was conducted. Survival of juvenile fish at White River Falls was estimated by releasing juvenile chinook and steelhead above the falls during high and low flow periods and recapturi… more
Date: June 1985
Creator: Oregon. Department of Fish and Wildlife.
Item Type: Refine your search to only Report
open access

Human factors design guidelines for maintainability of Department of Energy nuclear facilities

Description: Intent of these guidelines is to provide design and design review teams of DOE nuclear facilities with human factors principles to enhance the design and aid in the inspection of DOE nuclear facilities, systems, and equipment. These guidelines are concerned with design features of DOE nuclear facilities which can potentially affect preventive and corrective maintenance of systems within DOE nuclear facilities. Maintenance includes inspecting, checking, troubleshooting, adjusting, replacing, rep… more
Date: June 18, 1985
Creator: Bongarra Jr., J. P.; VanCott, H. P.; Pain, R. F.; Peterson, L. R. & Wallace, R. I.
Item Type: Refine your search to only Report
open access

An experiment to measure the electron neutrino mass using a cryogenic tritium source

Description: An experiment has been performed to determine the electron neutrino mass with the precision of a few eV by measuring the tritium beta decay energy distribution near the endpoint. Key features of the experiment are a 2 eV resolution electrostatic spectrometer and a high-activity frozen tritium source. It is important that the source have electronic wavefunctions which can be accurately calculated. These calculations have been made for tritium and the HeT/sup +/ daughter ion and allow determinati… more
Date: June 25, 1985
Creator: Fackler, O.; Jeziorski, B.; Kolos, W.; Monkhorst, H.; Mugge, M.; Sticker, H. et al.
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open access

Nondestructive assay instrumentation for Savannah River Plant reprocessing accountability

Description: We have designed, developed, and calibrated three different types of nondestructive assay systems for the Savannah River Plant (SRP). These systems will be delivered to SRP in 1986 and become part of the nuclear material accounting instrumentation at one of SRP's reprocessing facilities. Among the various types of nondestructive assay systems to be implemented are a neutron counter (Los Alamos National Laboratory - LANL), a four-station calorimeter (Mound Laboratories), a waste solution assay s… more
Date: June 21, 1985
Creator: Ruhter, W. D.; Camp, D. C.; Gunnink, R. & Prindle, A. L.
Item Type: Refine your search to only Article
open access

Technology development for high power induction accelerators

Description: The marriage of Induction Linac technology with Nonlinear Magnetic Modulators has produced some unique capabilities. It appears possible to produce electron beams with average currents measured in amperes, at gradients exceeding 1 MeV/meter, and with power efficiencies approaching 50%. A 2 MeV, 5 kA electron accelerator has been constructed at the Lawrence Livermore National Laboratory (LLNL) to demonstrate these concepts and to provide a test facility for high brightness sources. The pulse dri… more
Date: June 11, 1985
Creator: Birx, D.L. & Reginato, L.L.
Item Type: Refine your search to only Article
open access

Wave functions and finite size effects in a two-dimensional lattice field theory

Description: A study of finite size corrections to the masses of fermions and bound states in the Baxter/massive Thirring/sine Gordon lattice field theory is discussed. It is shown that information on bound tate wave functions may be used to extrapolate Monte Carlo mass calculations to infinite volume. 10 refs., 4 figs.
Date: June 1, 1985
Creator: Thacker, H.B.
Item Type: Refine your search to only Article
open access

Laser Program annual report 1984

Description: The Laser Program Annual Report is part of the continuing series of reports documenting the progress of the unclassified Laser Fusion Program at the Lawrence Livermore National Laboratory (LLNL). As in previous years, the report is organized programmatically. The first section is an overview of the basic goals and directions of the LLNL Inertial Confinement Fusion (ICF) Program, and highlights the year's important accomplishments. Sections 2 through 7 provide the detailed information on the var… more
Date: June 1, 1985
Creator: Rufer, M.L. & Murphy, P.W. (eds.)
Item Type: Refine your search to only Report
open access

General-Purpose Heat Source safety verification test series: SVT-1 through SVT-6

Description: The General-Purpose Heat Source (GPHS) is a modular heat source that will supply energy for Radioisotope Thermoelectric Generators (RTGs) in space missions. The Safety Verification Tests (SVTs) are performed to assess the plutonia containment capability of heat source modules subjected to certain accident environments. This interim report described the GPHS module configuration, the test environment, and the response of the module components following simulated reentry and solid Earth impact. T… more
Date: June 1, 1985
Creator: Pavone, D.; George, T.G. & Frantz, C. E.
Item Type: Refine your search to only Report
open access

Experimental terrestrial soil-core microcosm test protocol. A method for measuring the potential ecological effects, fate, and transport of chemicals in terrestrial ecosystems

Description: In order to protect the environment properly and have a realistic appraisal of how a chemical will act in the environment, tests of ecological effects and chemical fate must be performed on complex assemblages of biotic and abiotic components (i.e., microcosms) as well as single species. This protocol is one which could be added to a series of tests recently developed as guidelines for Section 4 of the Toxic Substances Control Act (P.L. 94-469; U.S.C., Section 2601-2629). The terrestrial soil-c… more
Date: June 1, 1985
Creator: Van Voris, P.; Tolle, D.A. & Arthur, M.F.
Item Type: Refine your search to only Report
open access

Importance and sensitivity of parameters affecting the Zion Seismic Risk

Description: This report presents the results of a study on the importance and sensitivity of structures, systems, equipment, components and design parameters used in the Zion Seismic Risk Calculations. This study is part of the Seismic Safety Margins Research Program (SSMRP) supported by the NRC Office of Nuclear Regulatory Research. The objective of this study is to provide the NRC with results on the importance and sensitivity of parameters used to evaluate seismic risk. These results can assist the NRC … more
Date: June 1, 1985
Creator: George, L. L. & O'Connell, W. J.
Item Type: Refine your search to only Report
open access

Developing the Geokinetics/Department of Energy horizontal in situ retorting process. Final report

Description: This report summarizes work performed under a cooperative agreement between Geokinetics Inc., and the US Department of Energy, spanning on eight year period. A large body of experimental data was generated which has been previously reported in a series of published and unpublished reports, as indicated in Chapter VII. The report summarizes research work performed from April of 1975 to August 15, 1985, but emphasizes data generated during the final three years of the project, when five large ret… more
Date: June 1, 1985
Creator: Lekas, M.A.
Item Type: Refine your search to only Report
open access

White River Falls Fish Passage Project, Tygh Valley, Oregon: Final Technical Report, Volume 1

Description: Studies were conducted to describe current habitat conditions in the White River basin above White River Falls and to evaluate the potential to produce anadromous fish. An inventory of spawning and rearing habitats, irrigation diversions, and enhancement opportunities for anadromous fish in the White River drainage was conducted. Survival of juvenile fish at White River Falls was estimated by releasing juvenile chinook and steelhead above the falls during high and low flow periods and recapturi… more
Date: June 1985
Creator: Oregon. Department of Fish and Wildlife.
Item Type: Refine your search to only Report
open access

Studies of Molecular Monolayers at Air-Liquid Interfaces by Second Harmonic Generation: Question of Orientational Phase Transition

Description: Insoluble molecular monolayers at gas-liquid interfaces provide an insight to the understanding of surfactants, wetting, microemulsions and membrane structures and offer a possibility to study the rich world of 2-dimensional phase transitions. In the interpretation of the observed properties of these systems various assumptions about the molecular orientation are often made, but so far few clear experimental data exist. In this paper we will show how optical second harmonic generation (SHG) can… more
Date: June 1, 1985
Creator: Rasing, T.; Shen, Y. R.; Kim, M. W.; Grubb, S. & Bock, J.
Item Type: Refine your search to only Article
open access

Onsite Disposal of Commercial Radioactive Waste: The ONSITE/MAXI1 Computer Program

Description: The objective of this study was to modify an existing environmental pathways-to-humans model and accompanying computer program (MAXI1) for use by NRC staff for assessing potential radiological impacts resulting from the onsite burial of low-level radioactive wastes. As part of this effort, specific human-intrusion scenarios were developed to consider various routes of potential exposure, which included direct external exposure, inhalation, and ingestion of contaminated foodstuffs and drinking w… more
Date: June 1, 1985
Creator: Kennedy, W. E., Jr.; Peloquin, R. A. & Napier, B. A.
Item Type: Refine your search to only Article
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