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Metallic coating of microspheres

Description: Extremely smooth, uniform metal coatings of micrometer thicknesses on microscopic glass spheres (microspheres) are often needed as targets for inertial confinement fusion (ICF) experiments. The first part of this paper reviews those methods used successfully to provide metal coated microspheres for ICF targets, including magnetron sputtering, electro- and electroless plating, and chemical vapor pyrolysis. The second part of this paper discusses some of the critical aspects of magnetron sputter … more
Date: August 15, 1980
Creator: Meyer, S.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Glass-heat-pipe evacuated-tube solar collector

Description: A glass heat pipe is adapted for use as a solar energy absorber in an evacuated tube solar collector and for transferring the absorbed solar energy to a working fluid medium or heat sink for storage or practical use. A capillary wick is formed of granular glass particles fused together by heat on the inside surface of the heat pipe with a water glass binder solution to enhance capillary drive distribution of the thermal transfer fluid in the heat pipe throughout the entire inside surface of the… more
Date: August 6, 1981
Creator: McConnell, R.D. & VanSant, J.H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Interferometric measurements of multilayer and double shell inertial fusion targets

Description: Optical interference microscopy plays an important role in the measurement of targets for inertial confinement fusion experiments. We describe how these techniques are applied to the measurement of thickness and refractive index of multilayer films on both flat substrates and microsphere targets. We also discuss procedures for manipulating and examining microsphere targets to measure defects and wall thickness variations anywhere on the target. Finally, we describe the use of optical interferom… more
Date: August 26, 1980
Creator: Weinstein, B.W.; Weir, J.T. & Willenborg, D.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Use of molecular beams to support microspheres during plasma coating

Description: Spherical laser fusion targets can be levitated on beams of Ar or other gas atoms. This is an especially useful and reliable technique for supporting microspheres during plasma coating or plasma etching. The reliability of this technique is principally the result of two things: the success of a special centering device which provides a lateral, stabilizing force on the levitated microspheres; and a gas handling system which is capable of controlling levitation gas flow in the microtorr liter/se… more
Date: August 26, 1980
Creator: Crane, J. K.; Smith, R. D.; Johnson, W. L.; Letts, S. A.; Korbel, G. R. & Krenick, R. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Quality engineering and control. Semiannual progress report, November-December 1978, January-April 1979. [PCB]

Description: This document reports the following: atomic absorption spectroscopy of Ir in Pu-Ir alloys; removal of Pu from soil; surface microanalysis using elemental x-ray mapping; microscopic scanning of Ga in Pu; microscopy of defects in Pu; emission spectroscopy of Ir and Y in PuO/sub 2/; gas chromatograhy of PCB's in transformer oils and water; liquid chromatography of chlorophenoxy acid herbicides in water; solution analysis by spark source mass spectrometry; a portable gas sampling system; flamm… more
Date: August 2, 1980
Creator: Carpenter, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of highly polished, grazing incidence mirrors for synchrotron radiation beam lines at SSRL

Description: New platinum-coated grazing incidence mirrors with low surface roughnesses have been developed to focus bending magnet radiation from the SSRL/SLAC SPEAR storage ring on the entrance slits of two Beam Line VIII grating monochromators. The first mirror in the toroidal grating monochromator (TGM) branch is a cooled SiC cylinder capable of absorbing synchrotron radiation power levels of up to 260 watts without excessive distortion. This mirror deflects the beam vertically through a 12/degree/ angl… more
Date: August 1, 1987
Creator: Tirsell, K. G.; Berglin, E. J.; Fuchs, B. A.; Holdener, F. R.; Humpal, H. H.; Karpenko, V. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tokamak first-wall coating program development

Description: The development of a research program to study coatings for control of impurities originating from the first wall of a Tokamak reactor is extensively discussed. The first wall environment and sputtering, temperature, surface chemical, and bulk radiation damage effects are reviewed. Candidate materials and application techniques are discussed. The philosophy and flow chart of a recommended coating development plan are presented and discussed. Projected impacts of the proposed plan include benefi… more
Date: August 1, 1977
Creator: Davis, M. J.; Langley, R. A. & Prevender, T. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Influence of design and coatings on the mechanical reliability of semiconductor wafers.

Description: We investigate some of the mechanical design factors of wafers and the effect on strength. Thin, solid, pre-stressed films are proposed as a means to improve the bulk mechanical properties of a wafer. Three-point bending was used to evaluate the laser scribe density and chemical processing effect on wafer strength. Drop and strike tests were employed to investigate the edge bevel profile effect on the mechanical properties of the wafer. To characterize the effect of thin films on stren… more
Date: August 2002
Creator: Yoder, Karl J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Corrosion-resistance characteristics of sputtered titanium-Hastelloy C glassy alloy coatings

Description: The corrosion-resistance characteristics of sputtered titanium (Ti)-Hastelloy C glassy alloy coatings were studied in 1 N HCl solution by potentiodynamic polarization methods. The sputtered Ti-Hastelloy C glassy alloy coatings had excellent corrosion resistance, similar to that of sputtered and heat-treated tungsten stainless steel (W-304 SS) glassy alloys. More significantly, an optimum atom percent of Ti in the sputtered Ti-Hastelloy C glassy alloy coatings for the desired corrosion-resistanc… more
Date: August 1, 1986
Creator: Faldetta, G.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ion beam and defect-related research in the Solid State Division. [LiNbO/sub 3/, Al/sub 2/O/sub 3/]

Description: This paper contains viewgraphs on the topic of radiation effects of solid state materials. In particular, it elaborates on ion beam deposition of thin film structures, ion implantation damage in crystals of Al/sub 2/O/sub 3/, and ion implanted optical waveguides in LiNbO/sub 3/. (LSP)
Date: August 5, 1986
Creator: Roberto, J.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Work Function Study of Iridium Oxide and Molybdenum Using UPS and Simultaneous Fowler-Nordheim I-V Plots with Field Emission Energy Distributions

Description: The characterization of work functions and field emission stability for molybdenum and iridium oxide coatings was examined. Single emission tips and flat samples of molybdenum and iridium oxide were prepared for characterization. The flat samples were characterized using X-ray Photoelectron Spectroscopy and X-ray diffraction to determine elemental composition, chemical shift, and crystal structure. Flat coatings of iridium oxide were also scanned by Atomic Force Microscopy to examine topography… more
Date: August 1999
Creator: Bernhard, John Michael
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Effect of Lithium PFC Coatings on NSTX Density Control

Description: Lithium coatings on the graphite plasma facing components (PFCs) in NSTX are being investigated as a tool for density profile control and reducing the recycling of hydrogen isotopes. Repeated lithium pellet injection into Center Stack Limited and Lower Single Null Ohmic Helium Discharges were used to coat graphite surfaces that had been pre-conditioned with Ohmic Helium Discharges of the same shape to reduce their contribution to hydrogen isotope recycling. The following deuterium NBI reference… more
Date: August 21, 2006
Creator: Kugel, H W; Bell, M G; Bush, C; Gates, D; Gray, T; Kaita, R et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Soft X-ray Mirrors for the Linac Coherent Light Source

Description: The Linac Coherent Light Source (LCLS) is a 0.15-1.5 nm wavelength free-electron laser (FEL) being constructed at the Stanford Linear Accelerator Center (SLAC) by a multi-institution consortium, including Lawrence Livermore National Laboratory (LLNL). One of LLNL's responsibilities involves the design and construction of two grazing-incidence mirror systems whose primary intent is to reduce radiation levels in the experimental halls by separating the FEL beam from unwanted high-energy photons. … more
Date: August 13, 2007
Creator: Pivovaroff, M. J.; Bionta, R. M.; Mccarville, T. J.; Soufli, R. & Stefan, P. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Anodic Behavior of SAM2X5 Material Applied as Amorphous Coatings

Description: Iron-based amorphous alloys are desirable industrial materials since they are highly resistant to corrosion and possess enhanced hardness for wear resistance. The amorphous materials can be produced from the melt as powder and later spray deposited as coatings on large engineering structures. As a laboratory experiment, SAM2X5 powder was coated on electrochemical specimens of 304SS for testing. Results show that the coated specimens did not perform satisfactorily during the laboratory testing. … more
Date: August 10, 2007
Creator: Hailey, P D; Farmer, J C; Day, S D & Rebak, R B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Project Report G-Plus Windshield Coatings

Description: Samples of Sungate windshield material provided by PPG were analyzed to ascertain failure mechanisms observed at the interface between a copper busbar and the electrically conductive coating in use. Samples of “failed” windshield material were characterized using optical and electron microscopy, as well as surface analysis methods. These were compared to corresponding samples of “good” coatings. The primary failure mechanism of the coated windshield appears to be related to electrical discharge… more
Date: August 1, 2002
Creator: Matson, Dean W. & Koram, Kwaku
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enhancement of T1 and T2 relaxation by paramagnetic silica-coated nanocrystals

Description: We present the first comprehensive investigation on water-soluble nanoparticles embedded into a paramagnetic shell and their properties as an MRI contrast agent. The nanoprobes are constructed with an inorganic core embedded into an ultra-thin silica shell covalently linked to chelated Gd{sup 3+} paramagnetic ions that act as an MRI contrast agent. The chelator contains the molecule DOTA and the inorganic core contains a fluorescent CdSe/ZnS qdots in Au nanoparticles. Optical properties of the … more
Date: August 28, 2006
Creator: Gerion, D; Herberg, J; Gjersing, E; Ramon, E; Maxwell, R; Gray, J W et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Deformation Microstructures and Creep Mechanisms in Advanced ZR-Based Cladding Under Biazal Loading

Description: Investigate creep behavior of Zr-based cladding tubes with attention to basic creep mechanisms and transitions in them at low stresses and/or temperatures and study the dislocation microstructures of deformed samples for correlation with the underlying micromechanism of creep
Date: August 11, 2008
Creator: Murty, K. Linga (KL)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Oxygen Transport Ceramic Membranes

Description: In the present quarter, experiments are presented on ceramic/metal interactions of Zirconia/ Ni-B-Si system and with a thin Ti coating deposited on zirconia surface. Existing facilities were modified for evaluation of environmental assisted slow crack growth and creep in flexural mode. Processing of perovskites of LSC, LSF and LSCF composition were continued for evaluation of mechanical properties as a function of environment. These studies in parallel to those on the LSFCO composition is expec… more
Date: August 7, 2003
Creator: Bandopadhyay, S. & Nagabhushana, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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GEOCHEMICAL AND ISOTOPIC CONSTRAINTS ON GROUND-WATER FLOW DIRECTIONS, MIXING AND RECHARGE AT YUCCA MOUNTAIN, NEVADA

Description: This analysis is governed by the Office of Civilian Radioactive Waste Management (OCRWM) Analysis and Modeling Report Development Plan entitled ''Geochemical and Isotopic Constraints on Groundwater Flow Directions, Mixing and Recharge at Yucca Mountain'' (CRWMS M&O 1999a). As stated in this Development Plan, the purpose of the work is to provide an analysis of groundwater recharge rates, flow directions and velocities, and mixing proportions of water from different source areas based on gro… more
Date: August 17, 2000
Creator: Meijer, A. & Kwicklis, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electron transport through single carbon nanotubes

Description: We report on the transport of energetic electrons through single, well aligned multi-wall carbon nanotubes (CNT). Embedding of CNTs in a protective carbon fiber coating enables the application of focused ion beam based sample preparation techniques for the non-destructive isolation and alignment of individual tubes. Aligned tubes with lengths of 0.7 to 3 mu m allow transport of 300 keV electrons in a transmission electron microscope through their hollow cores at zero degree incident angles and … more
Date: August 1, 2007
Creator: Schenkel, Thomas; Chai, G.; Heinrich, H.; Chow, L. & Schenkel, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Novel Fouling-Reducing Coatings for Ultrafiltration, Nanofiltration, and Reverse Osmosis Membranes

Description: Polymeric membranes could potentially be the most flexible and viable long-term strategy for treatment of produced water from oil and gas production. However, widespread use of membranes, including reverse osmosis (RO) membranes, for produced water purification is hindered due to fouling caused by the impurities present in the water. Fouling of RO membranes is likely caused by surface properties including roughness, hydrophilicity, and charge, so surface modification is the most widely consider… more
Date: August 31, 2008
Creator: Freeman, Benny
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chromium-molybdenum steels for fusion-reactor applications

Description: Because ferritic steels have been found to have excellent resistance to swelling when irradiated in a fast-breeder reactor, Cr-Mo steels have recently become of interest for nuclear applications, both as cladding and duct material for fast-breeder reactors and as a first-wall and blanket structural material for fusion reactors. In this paper we will assess the Cr-Mo steels for fusion reactor applications. Possible approaches on how Cr-Mo steels may be further developed for this application will… more
Date: August 1, 1981
Creator: Klueh, R.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Construction tolerances for low loss, dielectric coated, metallic waveguide for transmission optical radiation

Description: The transmission of radiation, in a specific mode of interest for the IFELA, past a symmetric step in dielectric coating thickness has been calculated. The result shows that the transmission loss depends on the quantity (s/D)/sup 2/ and vanishes to first order in the ratio of the step s to the guide aperture D. With the reasonable assumption that this feature holds for all forms of surface imperfections, the attenuation length due to imperfections has been estimated. It is found that rms surfac… more
Date: August 1, 1984
Creator: Sandweiss, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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