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in subjects: "Molybdenum"

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Use of molybdenum ion source electrodes at RTNS-II

Reports are reported for an ongoing effort to optimize D+ beam production by the MATS-III ion source used at RTNS-II. The three seven-aperture electrodes, originally consisting of water-cooled copper, have now been tested using uncooled molybdenum and with water cooling on the second (decel) electrode only. Details of the change, the results of the testing, and the benefits in operation, performance and cost are given.

Date: September 29, 1986

Creator: Massoletti, D.J.; Harter, G.A. & Heikkinen, D.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

TCT hybrid preconceptual blanket design studies

The conceptual design of a tokamak fusion-fission (hybrid) reactor, which produces electric power and fissile material, has been performed in a cooperative effort between Princeton's Plasma Physics Laboratory (PPPL) and Battelle's Pacific Northwest Laboratories (PNL). PPPL, who had overall project lead responsibility, designed the fusion driver system. Its core consists of a tokamak plasma maintained in the two-component torus (TCT) mode by both D and T beams and having a single null poloidal d… more

Date: January 1, 1978

Creator: Aase, D. T.; Bampton, M. C. C.; Doherty, T. J.; Leonard, B. R.; McCann, R. A.; Newman, D. F. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Hydrogen bonding in asphaltenes and coal. Progress report, March 1, 1977--August 31, 1977

A calorimetric method is presented for the simultaneous evaluation of equilibrium constant, K, and molar enthalpy, ..delta..H/sup 0/, for 1 : 1 adduct formation of quinoline (Qu) with asphaltene (A), together with its acid/neutral (AA) fraction and its base (BA) fraction, isolated from a centrifuged liquid product (CLP) sample prepared from Kentucky hvAb coal at 27.6 MPa hydrogen pressure and 723K, with reactor charged with glass pellets. The same procedure was used to determine K and ..delta..… more

Date: August 1, 1977

Creator: Li, N. C. & Tewari, K. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Stream sediment detailed geochemical survey for Marysvale, Utah

Results of the Marysvale detailed geochemical survey are reported. Field and laboratory data are presented for 397 stream sediment samples and 160 radiometric readings. Statistical and areal distributions of uranium and possible uranium-related variables are displayed. A generalized geologic map of the area is provided, and pertinent geologic factors which may be of significance in evaluating the potential for uranium mineralization are briefly discussed. Stream sediments containing significant… more

Date: July 31, 1980

Creator: Butz, T. R.; Vreeland, J. L.; Bard, C. S.; Helgerson, R. N.; Grimes, J. G. & Pritz, P. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Investigations of CuInSe sub 2 Thin Films and Contacts

This report describes research into electrical contacts for copper indium diselenide (CuInSe{sub 2}) polycrystalline thin films used for solar cell applications. Molybdenum contacts have historically been the most promising for heterojunction solar cells. This program studied contact stability by investigating thermally induced bilayer reactions between molybdenum and copper, indium, and selenium. Because selenization is widely used to fabricate CuInSe{sub 2} thin films for photovoltaic cells, … more

Date: October 1, 1991

Creator: Nicolet, M. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Solder fatigue reduction in point focus photovoltaic concentrator modules

Solder fatigue tests have been conducted on point focus photovoltaic concentration cell assemblies to identify a baseline fatigue life and to quantify the fatigue life improvements that result using a copper-molybdenum-copper low-expansion insert between the solar cell and copper heat spreader. Solder microstructural changes and fatigue crack growth were identified using cross sections and ultrasonic scans of the fatigue solder joints. The Coffin-Manson and Total Strain fatigue models for low-c… more

Date: January 1, 1991

Creator: Hund, T. D. & Burchett, S. N.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Exact calculations of nuclear-recoil energies from prompt gamma decays resulting from neutron capture

The results of an accurate determination of the recoil spectrum from (n, ..gamma..) reactions in molybdenum are presented. The recoil spectrum has been calculated from nuclear level structure data and measured branching ratios. Angular correlations between successive gammas have been accounted for using the standard theoretical techniques of Racah algebra and the density matrix formalism.

Date: July 20, 1981

Creator: Kinney, J.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Process and analytical studies of enhanced low severity co-processing using selective coal pretreatment

This report describes progress on research during the eleventh quarter of this contract dealing with applications of coal pretreatment techniques in coal/oil co-processing and direct hydroliquefaction. The objectives of the project are to investigate various coal pretreatment techniques and to determine the effect of these pretreatment procedures on the reactivity of the coal. Reactivity enhancement will be evaluated under both direct hydroliquefaction and co-processing conditions. Coal convers… more

Date: 1991-06~

Creator: Baldwin, R. M.; Gaur, S. & Miller, R. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Surface damage of molybdenum and TZM alloy under D/sup +/ impact

The surface damage of polycrystalline molybdenum and TZM alloy under 40-, 60-, and 120-keV D/sup +/ impact has been investigated for irradiation in both pulsed and continuous mode for total doses varying from 1.7 x 10/sup 17/ to 2.2 x 10/sup 19/ ions/cm/sup 2/ and for target temperatures verying from ambient temperature to 400/sup 0/C. Analysis by scanning electron microscopy of the MO samples held at ambient temperatures during D/sup +/ irradiations in both pulsed and continuous modes revealed… more

Date: January 1, 1977

Creator: Das, S.K.; Kaminsky, M. & Dusza, P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

System model for analysis of the mirror fusion-fission reactor

This report describes a system model for the mirror fusion-fission reactor. In this model we include a reactor description as well as analyses of capital cost and blanket fuel management. In addition, we provide an economic analysis evaluating the cost of producing the two hybrid products, fissile fuel and electricity. We also furnish the results of a limited parametric analysis of the modeled reactor, illustrating the technological and economic implications of varying some important reactor de… more

Date: October 12, 1977

Creator: Bender, D.J. & Carlson, G.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Spectra in the 60 )angstrom) to 345 )angstrom) wavelength region of elements injected into the PLT tokamak

High resolution spectra of the elements Fe, Ni, Zn, Ge, Se, and Mo injected into the PLT tokamak were recorded by the 2-meter Schwob-Fraenkel soft X-ray multichannel spectrometer (SOXMOS). Spectra were recorded every 50 ms during the time before and after injection. The spectral lines of the injected element were very strong in the spectrum recorded immedately after injection, and the transition in the injected element were easily distinguished from the transitions in te intrinsic elements (C, … more

Date: March 1, 1988

Creator: Wouters, A.; Schwob, J.L.; Suckewer, S.; Seely, J.F.; Feldman, U. & Dave, J.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Chemical Vapor Deposition of Refractory Metal Reflectors for Spectrally Selective Solar Absorbers. Annual Report, May 1, 1978-April 30, 1979

Three methods are described to fabricate by chemical vapor deposition (CVD) molybdenum films which rival conventional mirror materials in their infrared reflectance. With an absolute reflectance of 97.4% at 10 ..mu..m, these Super Molybdenum films reflect better than any other molybdenum film previously reported. When deposited in the presence of oxygen, films of a reduced reflectance over the solar emission range result. If passivated and antireflected by a Si/sub 3/N/sub 4/ layer, such Black … more

Date: May 1, 1979

Creator: Seraphin, B. O. & Carver, G. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Magnetic multilayer interface anisotropy

Ni/Mo and Ni/V multilayer magnetic anisotropy has been investigated as a function of Ni layer thickness, frequency and temperature. Variable frequency ferromagnetic resonance (FMR) measurements show, for the first time, significant frequency dependence associated with the multilayer magnetic anisotropy. The thickness dependence allows one to extract the interface contribution from the total anisotropy. Temperature dependant FMR (9 GHz) and room temperature magnetization indicate that strain bet… more

Date: January 1, 1991

Creator: Pechan, M. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Combined shift and methanation in a fluidized-bed reactor. Quarterly progress report, 1 April-30 June 1980

Only one bench-scale reactor test was completed. The Harshaw Ni/Cu/Mo and UCI (composition undisclosed) catalysts were evaluated over a 12-day period at 800 F and a feed gas H/sub 2//CO ratio of 2/1. Initial conversions with both catalysts were about 33 percent; and the activities of both samples declined steadily during the test, with final conversion values in the 15 to 20 percent range. During this test, problems were experienced with water carryover into the Drierite traps, necessitating so… more

Date: July 1, 1980

Creator: Streeter, R C

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Evaluation of management options for disposal of salt and trace element laden agricultural drainage water from the Fallon Indian Reservation, Fallon, Nevada

This is the final report describing work performed on the Fallon Indian Reservation by the Earth Sciences Division at Lawrence Berkeley Laboratory during FY90. These investigations were initiated at the request of the United States Bureau of Reclamation in response to recent concerns regarding disposal of agriculture drainage water from the Reservation. The Reservation is transected by numerous irrigation and drainage canals, including the TJ Drain. Recent investigations by the US Fish and Wild… more

Date: March 1, 1991

Creator: Tokunaga, Tetsu & Benson, S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Liquid-metal embrittlement of refractory metals by molten plutonium

Embrittlement by molten plutonium of the refractory metals and alloys W-25 wt % Re, tantalum, molybdenum, and Ta-10 wt % W was studied. At 900/sup 0/C and a strain rate of 10/sup -4/ s/sup -1/, the materials tested may be ranked in order of decreasing susceptibility to liquid-plutonium embrittlement as follows: molybdenum, W-25 wt % Re, Ta-10 wt % W, and tantalum. These materials exhibited a wide range in susceptibility. Embrittlement was found to exhibit a high degree of temperature and strain… more

Date: July 1, 1980

Creator: Lesuer, D. R.; Bergin, J. B.; McInturff, S. A. & Kuhn, B. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Control of catalytic hydrotreating selectivity with ammonia. [Hydrodeoxygenation]

The hydrogenation of naphthalene in the presence of 0, 24, or 48 kPa of ammonia derived from propyl amine was studied during the hydrodeoxygenation (HDO) of dibenzofuran (DBF). A new sample of sulfided NiMo/Al{sub 2}O{sub 3} catalyst at 360{degrees}C, 6.9 MPa total H{sub 2} pressure in a vapor phase tubular reactor was used. As a base-line the HDO of DBF was also studied in the absence of both naphthalene and ammonia. Ammonia inhibited both the HDO of dibenzofuran and the hydrogenation of napht… more

Date: January 1, 1992

Creator: Satterfield, C. N. & Lee, C. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Silicon materials task of the Low-Cost Solar Array Project (Phase IV). Effects of impurities and processing on silicon solar cells. Nineteenth quarterly report, April 1980-June 1980

The overall objective of this program is to define the effects of impurities, various thermochemical processes, and any impurity-process interactions upon the performance of terrestrial solar cells. The results of the study form a basis for silicon producers, wafer manufacturers, and cell fabricators to develop appropriate cost-benefit relationships for the use of less pure, less costly solar grade silicon. Nine 4 ohm-cm p type silicon ingots were grown and evaluated in support of the experimen… more

Date: July 1, 1980

Creator: Hopkins, R. H.; Davis, J. R.; Rohatgi, A.; Campbell, R. B.; Rai-Choudhury, P.; Hanes, M. H. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Model for H/sup -/ and D/sup -/ production by hydrogen backscattering

The Marlowe Monte-Carlo backscattering code has been used to calculate particle reflection coefficients and energy distributions for H, D incident upon Li, K, Ni, Cu, Mo, Ag, Cs, Hf, W, Pt, and U surfaces. The backscattered energy and angular distributions are combined with a model for formation and survival probabilities for H/sup -/, D/sup -/ leaving the surface. A least-squares fit of experimental measurements of H/sup -/ yields from the composite surface, Cs/Cu, has been used to obtain two … more

Date: May 27, 1980

Creator: Hiskes, J.R. & Schneider, P.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Trace elements in the terrestrial environment of a coal-fired powerhouse

A coal-fired powerhouse at the Savannah River Plant, Aiken, South Carolina operated for more than 20 years without electrostatic precipitators and consumed about 360,000,000 kilograms of coal per year. Twenty-nine trace elements were measured in fly ash, and in samples of soil, vegetation, and ground water collected along a 29-km traverse centered on the powerhouse. There were statistically significant effects of the stack releases upon the concentration of Ba, Be, Cu, Hg, Mn, Se, and Sr in soi… more

Date: September 1, 1977

Creator: Horton, J. H.; Dorsett, R. S. & Cooper, R. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

DOE/JPL advanced thermionic technology program. Progress report No. 42

Progress is reported on the following tasks: (I) surface and plasma investigations, (II) low-temperature converter development, (III) enhanced mode converter experiments, (IV) component hardware development, (V) thermionic power module system studies, (VI) thermionic array module development, (VII) high-temperature converter evaluation, (VIII) advanced converter studies, (IX) postoperational diagnostics, (X) cylindrical converter component development, and (XI) correlation of design interfaces.… more

Date: January 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Engineering data bases for refractory alloys

Refractory alloys based on niobium, molybdenum, tantalum, and tungsten are required for the multi-100kW(e) space nuclear reactor power concepts that have been assessed in the SP-100 Program because of the extremely high temperatures involved. A review is presented of the technology efforts on the candidate refractory alloys in the areas of availability/fabricability, mechanical properties, irradiation effects, and compatibility. Of the niobium-base alloys, only Nb-1Zr has a data base that is su… more

Date: January 1, 1985

Creator: Cooper, R.H. Jr. & Harms, W.O.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Thin film polycrystalline silicon solar cells. Quarterly technical progress report No. 2, 1 January 1980-31 March 1980

During this second quarter of the program, data on the effects of trace amounts (ppM level) of oxygen on the MoSi/sub 2/ substrate separation layer have been refined. Analysis of the composit substrate process has indicated that its complexity and expense are too great for practical development; as a result of this, and continued success with Mo substrates, efforts on composite substrates have been discontinued. By extensive operation of the semicontinuous plasma deposition system, operational … more

Date: June 1, 1980

Creator: Sarma, K R; Rice, M J; Legge, R & Ellis, R J

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Hot corrosivity of coal gasification products on gas turbine alloys. Summary report, 15 April 1978-15 November 1979

The results of this investigation have produced mechanisms for the hot corrosion of a number of pure metals and alloys in the types of atmospheres likely to be obtained in turbines using coal conversion products as fuel. The results of these mechanistic studies suggest the following conclusions regarding application of alloys in these situations: (1) Simple Cr/sub 2/O/sub 3/-forming alloys of both Co and Ni have good hot corrosion resistance to most of the deposits likely to form in turbines bu… more

Date: January 1, 1979

Creator: Meier, G.H. & Gulbransen, E.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department