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in subjects: "Auger Electron Spectroscopy"  
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Metal-insulator-semiconductor photovoltaic devices

Description: The overall objective of this program is to conduct research on metal-insulator-semiconductor (MIS) solar cells to improve understanding of the basic parameters which control photovoltaic processes in these cell structures. Current work includes fabrication, characterization, and theoretical studies of single crystal silicon-based cells, with Si0/sub x/ as the insulating film and Al or Au as the front metal contact. Studies of these two systems are intended to provide needed reference systems f… more
Date: June 1, 1979
Creator: Olsen, L. C.; Garnier, J. E. & Turcotte, R. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrochemical photovoltaic cells CdSe thin film electrodes. Quarterly progress report No. 1, June-August 1979

Description: The overall objective of this program is to obtain AM1 efficiencies in the range of 10% with electrochemical cells utilizing thin film electrodes. The system currently being investigated is the CdSe/aqueous sulfide-polysulfide system. This report presents the results to date of the initial CdSe deposition parameter study. The key finding has been that the ratio of Se and Cd in the as deposited film has marked effect on the film's chemical, microstructural, optical, and electrical properties as … more
Date: September 1, 1979
Creator: Russak, M.A. & Creter, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heliostat mirror survey and analysis

Description: The mirrors used on concentrating solar systems must be able to withstand severe and sustained environmental stresses for long periods of time if they are to be economically acceptable. Little is known about how commercially produced wet process silvered second surface mirrors will withstand the test of time in solar applications. Field experience in existing systems has shown that the performance of the reflective surface varies greatly with time and is influenced to a large extent by the cons… more
Date: September 1, 1979
Creator: Lind, M. A.; Buckwalter, C. Q.; Daniel, J. L.; Hartman, J. S.; Thomas, M. T. & Pederson, L. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cuprous oxide photovoltaic cells. Final report, September 1, 1978-November 30, 1979

Description: The research described represents the beginning of a second phase of research on cuprous oxide photovoltaic cells. The first phase was concerned with the development of procedures of making Schottky barriers on isolated films of Cu/sub 2/O, including single crystals. It was found that properties of these Schottky barrier cells, in particular the barrier heights, were limited by chemical changes at the junction especially with metals of low work function which tend to be more active chemically, … more
Date: January 1, 1979
Creator: Trivich, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Scanning Auger analysis of surface segregation in 21-6-9 and JBK-75

Description: Measurements of surface segregation have been carried out on two austenitic stainless steels: Fe-21Cr-6Ni-9Mn and JBK-75. Highly polished polycrystalline samples of each material have been heated in-situ in an ultra-high vacuum system to temperatures ranging from 400/sup 0/ to 800/sup 0/C and examined at temperature using scanning Auger spectroscopy. The results for 21-6-9 show that segregation is strongly heterogeneous with isolated regions enriched in either nitrogen, sulfur or tin. Above app… more
Date: October 1, 1979
Creator: Stulen, R. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Thermal desorption measurements of hydrogen-isotope retention in Alcator-A

Description: Results are presented for deuterium retention measurements in type 304 stainless steel exposed in the edge plasma of the Alcator-A tokamak. Stainless steel samples, at 300K, with surface conditions characterized by Auger electron spectroscopy, were introduced into the limiter shadow region for exposure to deuterium plasmas, and then withdrawn into an appended UHV chamber for thermal desorption measurements. For unoxidized samples exposed at the vacuum vessel wall radius, 1 x 10/sup 15/Dcm/sup -… more
Date: December 1, 1979
Creator: Razdow, A. M.; Marmar, E. S.; Cohen, S. A. & Dylla, H. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of hydrogen species on metal-oxide surfaces by electron-stimulated desorption: TiO/sub 2/ and SrTiO/sub 3/*

Description: The hydrogen species on TiO/sub 2/ and SrTiO/sub 3/ have been characterized using the site specificity of electron-excited Auger Stimulated Desorption (ASD). Hydrogen is found to be bonded to surface Ti's in hydride-type bonds, to subsurface or bridgebonded O's in a hydroxyl-like bond, or be part of a surface hydroxyl. On SrTiO/sub 3/ the Ti-H and surface OH species are also found plus a high density of Sr-H and very little Sr-OH bonding. The general features of ASD, both electron- and photon-e… more
Date: January 1, 1979
Creator: Knotek, M.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fusion target analysis by quantitative scanning electron microscopy

Description: Recent developments in computer based systems for quantitative x-ray microanalysis, 4 Pi surface examination, Auger electron spectroscopy and Backscattered Microtopography measurement have extended the Scanning Electron Microscope's applications in ICF target development and production.
Date: September 25, 1979
Creator: Ward, C.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Properties of low cost, high volume glasses

Description: The properties of new and weathered samples of low cost, high volume glasses have been studied to determine their usefulness for solar energy applications. Glasses of varying compositions produced by float, drawn, rolled fusion, and twin ground techniques were examined. Spectral transmittance and reflectance were measured and solar weighted values calculated. Laser raytrace techniques were used to evaluate surface parallelism and bulk homogeneity. Compositional changes were examined with scanni… more
Date: January 1, 1979
Creator: Lind, M. A.; Hartman, J. S. & Buckwalter, C. Q.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies of metal--semiconductor interfaces in catalysis and energy conversion. Annual report, June 15, 1978--June 14, 1979. [Northwestern Univ. , Evanston, Ill]

Description: The installation of a multiple-technique surface analytical system capable of Auger, photoemission (UPS and XPS), low-energy electron diffraction, thermal desorption and thin-film evaporation studies was completed. An isolation cell attachment was designed for high-pressure gas-phase (1 to 1000 torr) reaction studies. By depositing nickel onto a clean ordered TiO/sub 2/(110) surface held at room temperature, an ordered overlayer was obtained as evidenced by LEED. Both energy loss and uv photoem… more
Date: March 1, 1979
Creator: Chung, Y W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microstructural evolution during dual-ion irradiation of candidate fusion reactor materials

Description: Single- and dual-ion (heavy ions + /sup 3/He) irradiations of Fe-20wt.%Ni-15wt.%Cr, V-15wt.%Cr and Ti-6wt.%Al-4wt.%V alloys have been performed over a range of temperatures and doses. Various features of microstructural evolution during irradiation are reported as determined by transmission electron microscopy and Auger spectroscopy investigations.
Date: January 1, 1979
Creator: Nolfi, F.V. Jr. & Ayrault, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies in Semiconducting Metal Oxides in Conjunction With Silicon for Solid State Gas Sensors. Progress Report, April 1, 1977-September 30,1979

Description: A fundamental investigation of SnO/sub 2/ and ZnO thin films with emphasis on their use in solid state gas detection is discussed. Methods of thin film preparation, described here, include the chemical vapor deposition (CVD) technique for SnO/sub 2/ films and the radio frequency sputtering technique for SnO/sub 2/ and ZnO films. The use of Auger electron spectroscopy, (AES), transmission electron microscopy, (TEM) and x ray diffractometry, (XRD) in the analysis of these films is reported. Caref… more
Date: September 1, 1979
Creator: Jordan, A. G. & Advani, G. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Methanation reaction on ruthenium thin films: a mechanistic investigation.

Description: The kinetics of the methanation reaction were measured on thin ruthenium films in the temperature range 548 to 623K. The pressures of the reactant gases were varied over the ranges 1.5 to 1500 ..mu..m for CO and 300 to 75000 ..mu..m for H/sub 2/ to yield kinetic orders for each gas. The CO kinetic order varied from +1 at low pressures to -2 at high pressures. As the H/sub 2/ pressure was increased its kinetic order varied from +2 to -1. Both of these order plots had unusually sharp maxima. The … more
Date: July 1, 1979
Creator: Slaughter, M. D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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AES and XPS study of plutonium oxidation

Description: The initial oxidation of plutonium metal at 27/sup 0/C has been studied using AES and XPS. Initially a clean plutonium surface was prepared by Ar/sup +/ bombardment and 500/sup 0/C-Ar/sup +/ bombardment heat cycles. Changes occurring in the plutonium Auger electron spectra in the energy range of 40 to 120 eV and the 4f/sub 5/2/, 4f/sub 7/2/ (core levels), and 5f, 7s (valence band) XPS peaks were monitored during oxygen exposure (10 to 1.8 x 10/sup 8/ L). Examination of the 4f/sub 7/2/ level rev… more
Date: January 1, 1979
Creator: Larson, D.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of Material Removed from UCLA Tokamaks Microtor and Macrotor

Description: This paper reports a first effort to examine the surface of the UCLA tokamaks, Microtor and Macrotor, by analyzing samples that have been exposed to plasma discharge and cleaning for long periods. The samples were sent to the Surface Science Section at the Pacific Northwest Laboratory (PNL). There, Auger electron spectrometry and sputter profile techniques were used to examine the samples, which had been handled in atmospheric conditions after being removed from the tokamak.
Date: February 1, 1979
Creator: Baer, D. R.; Thomas, M. T. & Taylor, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microprocessor-based scan control unit for electron and photon beams used in surface analysis

Description: A microprocessor-based X-Y scan control unit was developed to interface with existing PHI Scanning Auger Microprobe and exoelectron emission electronics. The unit provides precise and versatile control of the rastered beams used for surface analysis. In addition to manual control there are options for automatic line and area scans with up to 1000 discrete beam analysis points per line (up to 10/sup 6/ for an entire frame area) and scanning rates continuously adjustable from 1 to 2000 points per… more
Date: May 1, 1979
Creator: Haney, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Impurity studies and discharge cleaning in Doublet III

Description: The goal of present and next generation tokamak experiments is to produce high-density, high-purity plasmas during high-power, extended-duration discharges. Plasma discharges with Z/sub eff/ values near unity and low concentrations of medium and high-Z metallic impurities have been obtained in Doublet III using a combination of low-power hydrogen discharge cleaning, gas puffing, precise plasma shape and position control, and high-Z limiters. Analysis of the first wall surface and residual gas i… more
Date: October 1, 1979
Creator: Marcus, F.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Interaction of carbon monoxide and hydrogen with the (1010) face of ruthenium

Description: The interaction was studied at 23.5, 200, and -135/sup 0/C with low energy electron diffraction (LEED) and Auger electron spectroscopy. (AES). Carbon monoxide adsorbs associatively at 23.5/sup 0/C, but is apparently dissociated by the LEED beam and hydrogen adsorbed from the ambient after a few minutes for less than 10 Langmuirs of carbon monoxide. For large doses of carbon monoxide at 23.5/sup 0/C, 10 Langmuirs or more, the LEED beam does not disociate carbon monoxide, but carbon monoxide and … more
Date: January 1, 1979
Creator: Tomcsik, T. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Composition profiling of solar coating materials. Final report, April 16, 1976-April 15, 1979

Description: Auger electron composition vs. depth and optical analysis revealed that a very inexpensive-to-produce (15 min. 900/sup 0/C heat treatment in air) Cr/sub 2/O/sub 3/ layer on stainless steels provides an excellent diffusion barrier for preventing stainless steel constituents from entering into an IR reflective Mo coating. It was shown that with sputter deposition of Mo at high rate in a clean noble gas plasma, one can obtain Mo coatings of excellent IR reflectance (> 96% between 2.5 and 25 ..mu..… more
Date: September 1, 1979
Creator: Wehner, G. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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