The following report presents the results of the Winnemucca Dry Lake Basin, Nevada, orientation study in the Lovelock and Reno 1° x 2° quadrangles. This study examines water and sediment samples, as well as uranium concentrated samples.

The applicability of the detailed quantum transition state theory (DQTST) of Light and Siczek (J. Chem. Phys. 64, 1907(1976)) is investigated for several collinear systems. The effects of boundary conditions and the placement of the transition state surface on the DQTST predictions are considered. It is shown that the reliability of DQTST is not simply correlated with any property of the reaction path profile (barrier height or reaction exothermicity): features of the potential energy surface associated with other degrees of freedom must also be considered.

A beamline is proposed for polarized protons to be built in the M-3 line of the Meson Laboratory utilizing lambda decays. This beamline would provide a clean source of polarized protons or an enriched beam of antiprotons or polarized antiprotons.

The JPL Low Cost Silicon Solar Array Project has been established with the goal of decreasing the cost of solar photovoltaic arrays for electrical power generation. Methods of producing silicon sheet for solar cells are under active development as one of several tasks designed to achieve this objective. In the crystal growing processes a refractory crucible is required to hold the molten silicon while in the ribbon processes an additional refractory shaping die is needed to enable silicon ribbon to be produced. In several ribbon processes the high temperature materials are a limiting factor in the development of the technique. The objective of this study is to develop and evaluate refractory die and container materials. First quarter studies are reported. Commercial high purity ultrafine Si/sub 3/N/sub 4/, Al/sub 2/O/sub 3/ and SiO/sub 2/ powders were vacuum dried and stored under nitrogen in sealed containers. Extensive analysis of the chemical, physical and morphological characteristics of these powders has been performed. The preparation of high purity A1N powder is being investigated by elevated temperature gas phase nucleation reactions involving (1) the reaction of AlCl/sub 3/(g) and NH/sub 3/ and (2) the reaction between AlCl(g) and NH/sub 3/. While optimization of reaction (1) …

A brief summary is presented of major accomplishments in a research program on the impact of synthetic fuels, electric vehicles, and railroad electification on energy consumption by the US transportation sector. (LCL)

Literature and patents relevant to solar air-heating collectors were reviewed. The design constraints are listed. The analysis considered the heat transfer and pressure loss characteristics of the various designs. Three absorbers along with the baseline design were mounted in identical collector bodies and subjected to thermal efficiency tests on Solaron's collector test stand. The testing was done simultaneously on the four panels in a side-by-side collector test. Various manufacturing techniques for producing an absorber with extended heat transfer surface were investigated. It was found that fins could be attached to the absorber in a cost-effective manner by an electrical resistance weld. Four finned absorbers were fabricated by resistance welding and installed in a 2 x 2 collector array to verify that these production model prototypes would, in fact, increase performance by a factor of 1.11. (MHR)

An Automatic Sequential Precipitation Sampler was designed and constructed at Brookhaven National Laboratory to collect precipitation samples for chemical analysis. The sampler is designed to collect both wet and frozen precipitation and to exclude dry fallout between precipitation events. The sampler consists of a large box containing a turntable holding 30 sampling bottles. Precipitation enters through a funnel on the top of the box. Between periods of precipitation, the funnel is closed by a movable cover which is actuated by a rain sensor when precipitation starts. Sample bottles are changed automatically and periodically from the time the cover opens. Times of cover opening and closing and of bottle changing are recorded on an event recorder. The sampler has operated successfully since June 1976.

Within the Federal Wind Energy Program, the Wind Characteristics Program Element (WCPE) is a service element established to provide the appropriate wind characteristics information to those involved in energy program planning, design and evaluation of wind energy conversion systems (WECS), selection of sites for the installation of WECS, and the operation of WECS. The program contributions are to consist of reliable estimates of wind characteristics pertinent to WECS design, effective analyses and methods for the determination of wind energy potential over large areas, dependable and cost-effective methodologies for the siting of WECS, and descriptions of the day-to-day variability and predictability of wind energy for WECS operations. To accomplish these goals, the WCPE has been divided into four technical program areas: wind characteristics for design and performance evaluation; mesoscale wind characteristics; development of siting methodologies; and wind characteristics for WECS operations.

Device related work has been directed toward the development of effective single and double layer antireflection coatings for Zn/sub 3/P/sub 2/. The reflectivity of bare Zn/sub 3/P/sub 2/. The reflectivity of bare Zn/sub 3/P/sub 2/ as well as SiO, Ta/sub 2/O/sub 5/, MgF/sub 2//ZnS and SiO/sub 2//ZnS coated samples have been measured. Reflection losses have been reduced to 5 to 6% with double layer Ar coatings. The experimental reflectivity integrated over the photon flux distribution yields a maximum J/sub SC/ = 26.5 ma/cm/sup 2/ for AM1.5 insolation (83.2 mW/cm/sup 2/). Theoretical modeling of the Schottky barrier grid device was begun in order to establish the relationship between collection efficiency, device geometry and minority carrier diffusion length. The study of the barrier height of metal/Zn/sub 3/P/sub 2/ junctions has been completed. Barrier height is particularly sensitive to surface damage such as that incurred during glow discharge cleaning. Thin polycrystalline films are now entering the device development stage. Chemical polishing of the surface of thin films with bromine-methanol yields surfaces suitable for photolithography. Devices however, have extremely high series resistance due to the high sheet resistance of the film. A multilayer substrate has been developed which is promising. It consists of mica …

The main thrust of work has been the development of a Zn/sub 3/P/sub 2/ based, Schottky barrier solar cell with 5% AMI conversion efficiency. Transparent metal film devices, fabricated by sputter depositing magnesium, were evaluated. Sputter deposition was necessary to prepare air stable films with reproducible electrical and optical properties. The highest conversion efficiency achieved (no A-R) is 1.72%. An alternative, Schottky barrier grid device was devised to avoid the difficulties encountered with transparent metal films. Using relatively thick (2000 A) magnesium films and line spacing on the order of twice the nominal, a total area conversion efficiency of 6.08% was measured. Correcting for grid blockage yields an active area efficiency of 7.6%. The diffusion length of minority carriers had been measured for a large number of single crystal devices using a spectral response technique as well as a newly developed laser scanning method. Diffusion lengths as long as 9 ..mu..m have been found. An extensive study of metal semiconductor contacts of Zn/sub 3/P/sub 2/ has been made. A model recently advanced by Brillson, which correlates barrier height with the enthalpy of the reaction taking place at the metal semiconductor interface is in excellent agreement with the data. Thin films …

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this report is about the Chemical thermodynamics of the System Cs-U-Zr-H-I-O in the LWR Fuel-Clad Gap.

The space and domestic water solar heating system designated SIMS Prototype System 1 has been evaluated at the MSFC Solar Heating and Cooling Test Facility. The test system used 720 ft2 (gross) of Solar Energy Products Air Collectors, a Solar Control Corporation SAM 20 Air Handler with Model 75-175 control unit, a Jackson Solar Storage tank with Rho Sigma Mod 106 controller, and 20 tons of rock storage. The test data analysis performed by IBM evaluates the system performance and documents the suitability of SIMS Prototype System 1 hardware for field installation.

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A dual-channel digitizing capability has been established to digitally record and analyze electrical waveforms associated with exploding bridgewire (EBW) burst. The system is interfaced to a computer for data management and analysis. Programs for calibration and for analysis of voltage and current waveforms have been written. Error sources have been reduced to an acceptable level, and provisions have been made for generation of a waveform data library.

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