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Three-dimensional temperature history of a multipass filled weldment. Part 2. [HEATINGS]

Description: Computer simulation of the three-dimensional temperature history in a multipass filled weldment was attempted by modifying a transient heat transfer code, HEATING5. The model includes temperature-dependent physical parameters, radiation and convection heat losses, turbulent and laminar convection in the molten pool, and variable arc velocity, intensity, and weld geometry. The model requires approximately 28 CPU min to simulate one second of welding. 15 figures, 8 tables.
Date: December 21, 1976
Creator: Pinkowish, J.A. & Whitman, P.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of radiation induced transients in hybrid microcircuits by magnetic thin film sensor/recorders

Description: Magnetic thin film transient current sensor/recorders were modified to make two types of nuclear test measurements, transient currents in hybrid microcircuits and internal electromagnetic pulse (IEMP) fields. The measurements were made possible by the invention of split-domain sensor/recorders which can measure bilateral currents and can be reset and readout on location. The sensor/recorders were used in two underground nuclear tests and numerous calibration tests in radiation-simulation machin… more
Date: September 21, 1976
Creator: Hsieh, E. J.; Vindelov, K. E.; Brown, T. G. & Miller, D. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

X-ray detector calibrations in the 280-eV to 100-keV energy range

Description: The absolute sensitivity for several different types of radiation detectors has been measured using x-rays in the energy range of 280 eV to 100 keV. The photons in this energy range are produced using three separate x-ray-generating facilities. The detectors include a silicon semiconductor, two photoelectric diode detectors employing aluminum and gold photocathodes, and three detectors incorporating plastic scintillators and photodiodes. The plastic scintillators were MEL-150C, Pilot B, and NE1… more
Date: April 21, 1976
Creator: Gaines, J. L.; Kuckuck, R. W. & Ernst, R. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Method of independent timesteps in the numerical solution of initial value problems

Description: In the numerical solution of initial-value problems in several independent variables, the timestep is controlled, especially in the presence of shocks, by a small portion of the logical mesh, what one may call the crisis zone. One is frustrated by the necessity of doing in the whole mesh frequent calculations required by only a small part of the mesh. It is shown that it is possible to choose different timesteps natural to different parts of the mesh and to advance each zone in time only as oft… more
Date: July 21, 1976
Creator: Porter, A. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cross-field injection of a charged, polarized, ion-electron beam

Description: An early idea for fueling a controlled fusion device had been the injection of a polarized mixture of ions and electrons across a magnetic field and into the device. Now, the beam intensity (several kA/cm/sup 2/) required for this technique is available from pulsed ion diodes. Remaining feasibility questions involve beam optics and trapping. The most obvious advantage over neutral-beam injection is avoidance of the need to produce high-energy atoms. Therefore, the technique will compete best at… more
Date: April 21, 1976
Creator: Hamilton, G. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MST-80 microprocessor trainer. [Uses INTEL 8080A CPU and support chips housed in attache case]

Description: This trainer is a complete, self-contained microcomputer system housed in a brief case for portability and convenience of use. It utilizes INTEL's 8080A microprocessor and associated support chips. The trainer is designed to allow the student to explore and learn the hardware and software capability of the 8080 microprocessor. It includes a breadboard socket so that experiments can be interfaced to the trainer. This option allows the student to learn both interfacing techniques and program… more
Date: May 21, 1976
Creator: Jones, G. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design and simulation of the first blanket zone of the DEMO fusion device

Description: An evaluation of the proposed design for the first blanket zone of the DEMO fusion device at Oak Ridge National Laboratory was performed by determining temperature profiles for a number of possible design geometries. Only one design configuration was acceptable and further evaluated by determining two-dimensional steady state temperature and tritium concentration profiles within the unit. The transient response of this design during periods of plasma shutdown was also determined to evaluate the… more
Date: December 21, 1976
Creator: Lee, J. H.; Dweck, J. S. & Kraftick, K. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Picosecond x-ray spectral studies

Description: Temporally and spectrally resolved x-ray emission is an important diagnostic tool for the study of target heating and compression induced by sub-nanosecond laser pulses. The use of the Livermore 15 psec x-ray streak camera to record x-ray emissions in the 1-10 keV range is described. In particular, significant progress is reported during the past year in defining the camera as a quantitative diagnostic instrument, and its implementation for multi-channel, time resolved K-edge filter measurement… more
Date: July 21, 1976
Creator: Attwood, D. T. & Coleman, L. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CPS: a continuous-point-source computer code for plume dispersion and deposition calculations

Description: The continuous-point-source computer code calculates concentrations and surface deposition of radioactive and chemical pollutants at distances from 0.1 to 100 km, assuming a Gaussian plume. The basic input is atmospheric stability category and wind speed, but a number of refinements are also included.
Date: May 21, 1976
Creator: Peterson, K. R.; Crawford, T. V. & Lawson, L. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary flow sheet and process design for ZnSe thermochemical cycle

Description: A preliminary design of the ZnSe cycle for thermochemical hydrogen production has been prepared for use in deriving economic costs for hydrogen production. The process flowsheet identifies key equipment items as well as major streams. Flow and heat loads have been estimated based on one mole of hydrogen output. The thermal efficiency of this cycle depends on two factors: (1) the ability to perform the dissolution of ZnSO/sub 4/ and the hydrolysis of ZnSe with a minimum amount of aqueous HCl, an… more
Date: June 21, 1976
Creator: Otsuki, H. H. & Cox, K. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Plasma flows in the conduction region of a spherical laser target

Description: Analytic solutions are dervied for plasma flows in a spherical laser target, emphasizing the region which lies between the ablation surface and the critical density surface. Electron thermal conductivity dominates the heat transport in this zone. Both classical electron thermal conduction and flux-limited conduction are treated in which the finite electron thermal velocity provides an upper bound to the heat flux. These analytic solutions are compared with computational results from 1-D hydrody… more
Date: October 21, 1976
Creator: Max, C. E.; McKee, C. F. & Mead, W. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Theoretical tool movement required to diamond turn an off-axis paraboloid on axis

Description: Current techniques for manufacturing off-axis paraboloids are both expensive and insufficiently accurate. An alternative method, turning the workpiece about its axis on a diamond-turning machine, is presented, and the equations describing the necessary tool movement are derived. A discussion of a particular case suggests that the proposed technique is feasible.
Date: July 21, 1976
Creator: Thompson, D. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Glass transition temperatures of epoxy resins by pulsed nuclear magnetic resonance spectroscopy

Description: Pulsed nuclear magnetic resonance spectroscopy has been used to measure the glass transition temperatures of cured epoxy resins. These measurements make it possible to monitor the cure and determine the glass transition temperature as a function of the curing conditions and the concentration of the components. Knowledge of the glass transition temperature of the cured epoxies allows screening of them for a number of uses, including adhesives and coatings operations.
Date: April 21, 1976
Creator: Rutenberg, A. C.; Dorsey, G. F. & Peck, C. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fast-neutron detector for use as a criticality monitor

Description: To increase the reliability of the criticality monitoring system in a diagnostic chemistry area and to reduce the number of false alarms, a new monitoring system was built using a fast-neutron detector. This paper outlines the design requirements, describes the plastic scintillation detector system as it was built, and reports on the results of several months of operation. The new monitor has proven much more useful than the gamma-detector system it replaced.
Date: September 21, 1976
Creator: Friesen, R. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Review of world experience and properties of materials for encapsulation of terrestrial photovoltaic arrays. Final report

Description: Available information defining the state of the art of encapsulation materials and processes for terrestrial photovoltaic devices and related applications were collected and analyzed. Based on criteria of properties, processability, availability, and cost, candidate materials were identified which have potential for use in encapsulation systems for low-cost, long-life terrestrial photovoltaic arrays manufactured by automated, high-volume processes. The criteria for consideration of the encapsul… more
Date: July 21, 1976
Creator: Carmichael, D. C.; Gaines, G. B.; Sliemers, F. A.; Kistler, C. W. & Igou, R. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy exchange within ecosystems. Fifth annual technical progress report, January 1--December 31, 1976. [Elodea densa]

Description: During the past year we have studied the effect of pH and inorganic carbon concentration on the photosynthesis of Elodea densa. In the pH range of 6 to 9, there is a dramatic change in the response of photosynthesis to pH. At 1 mM inorganic carbon and below photosynthesis increases with decreasing pH as expected, but at 10 mM and above there is a peak. This peak is between pH 7.5 and 8.0 when the inorganic carbon concentration is 10 to 20 mM and shifts to lower pH's with increasing temperature … more
Date: September 21, 1976
Creator: Gates, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Heat exchanger-ingot casting/slicing process. Silicon sheet growth development for the large area silicon sheet task of the low cost Silicon Solar Array Project. Third quarterly progress report, April 1, 1976--June 18, 1976

Description: The object of this program is to demonstrate that large single-crystal ingots, 6-inch diameter by 4 inches tall, can be economically cast by the Heat Exchanger Method (HEM) and economically sliced into thin sheets, 0.008-inches thick, with a multi-wafer slicer. The thrust of the experimental work during this quarter was to establish the proper seed meltback and to nucleate single-crystal growth off the seed. Slicing tests were begun on the multi-blade wafering machine, using a newly fabricated … more
Date: June 21, 1976
Creator: Schmid, F. & Reynolds, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fission fragment simulation of fusion neutron radiation effects on bulk mechanical properties

Description: This research demonstrates the feasibility of using homogeneously-generated fission fragments to simulate high-fluence fusion neutron damage in niobium tensile specimens. This technique makes it possible to measure radiation effects on bulk mechanical properties at high damage states, using conveniently short irradiation times. The primary knock-on spectrum for a fusion reactor is very similar to that produced by fission fragments, and nearly the same ratio of gas atoms to displaced atoms is pr… more
Date: September 21, 1976
Creator: Van Konynenburg, R. A.; Mitchell, J. B.; Guinan, M. W.; Stuart, R. N. & Borg, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Energy Technologies for the West: geothermal; energy from the Earth. Workshop held in San Francisco, California, 21 September 1976

Description: Dr. John W. Shupe, Univ. of Hawaii, the first of seven speakers, reviewed geothermal sources in Hawaii by means of a slide presentation. Prof. Hamilton Hess, University of San Francisco, dealt philosophically with geothermal energy, considered an ''exotic alternative, or at best, a marginal energy source.'' Robert G. Lacy, San Diego Gas and Electric Co., discussed geothermal development in the Imperial Valley. Dr. Tsvi Meidav, Geonomics, Inc., discussed the size of the geothermal resource and h… more
Date: September 21, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrogen--deuterium exchange in water vapor: the mass spectrometric sensitivities and the equilibrium constant

Description: The equilibrium constant, K/sub HDO/, for the reaction H/sub 2/O + D/sub 2/O = 2HDO can be expressed as an intensity ratio, I, measured mass spectrometrically, times a sensitivity ratio, S, measured in mass spectrometric calibration experiments. The latter is difficult to measure and previously was assumed to be unity. The 2.4 percent discrepancy between K's from theoretical calculations and direct mass spectrometric measurements might be explained by another value of S. An indirect measurement… more
Date: April 21, 1976
Creator: Pyper, J. W.; Dupzyk, R. J.; Friesen, R. D.; Bernasek, S. L.; May, C. A.; Echeverria, A. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hartree--Fock energy curves, for BrH/sup +/ (X /sup 2/PI), KrH/sup +/ (X/sup 1/. sigma. /sup +/), and RbH/sup +/ (X /sup 2/. sigma. /sup +/). I. Preliminary calculatons

Description: Restricted Hartree-Fock calculations for the ground electronic states of BrH/sup +/, KrH/sup +/, and RbH/sup +/ have been carried out using carefully selected nominal atomic basis sets for the heavy atoms, supplemented with an additional orbital designed to allow for a better description of atomic distortion at intermediate internuclear separations. A flexible four-function basis set was used on the hydrogen atom. Molecular optimization was carried out for the heavy-atom distortion orbital and … more
Date: January 21, 1976
Creator: Gardner, M. A.; Karo, A. M.; McMurphy, F. E. & Wahl, A. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of variables which affect the hardness of nickel plate deposited from watts-type baths

Description: In the course of the Cascade Improvement Program, many component equipment parts will be electroplated with nickel for corrosion protection. The maximum hardness which will be acceptable in the electroplated deposit is specified in Union Carbide's Job Specification JS-1396, Revision 3, entitled Electroplated Nickel Coatings on Steel Parts. The hardness specification is intended primarily as a control over both organic and inorganic impurities in the deposit. This report covers a study evaluatin… more
Date: January 21, 1976
Creator: Petit, G. S.; Wright, R. R. & Neff, W. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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