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ORMAK upgrade ohmic coil generator protection

Description: This report describes methods which can be used to limit the voltage across the generator for normal operation and various ground faults. It also contains quantitative information, obtained from the computer study, which can be used for evaluating the protection methods cost-wise.
Date: January 1, 1978
Creator: Campen, G. L.; Easter, R. B. & Nickels, L. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Factors affecting visual inspection of thin film network

Description: A study was made of various factors that affect the visual inspection of thin film networks. The effect of various types of reflected illumination, the effect of defect size or shape, the time required for inspection, and the inspection uniformity were evaluated. The use of polarized light is recommended for the visual inspection of thin film networks.
Date: January 1, 1978
Creator: Hines, R.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Current control by a homopolar machine with moving brushes

Description: The equation for TNS Doublet's E-coil circuit with moving brush homopolar machine is integrated in the flux of the homopolar for a monotonically increasing current function extending beyond the current reversal into the burn period. The results show that the moving brush feature is not useful for controlling the burn.
Date: January 1, 1978
Creator: Vogel, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Kilowatt Isotope Power System: component test report for the Ground Demonstration System Alternator Stator

Description: Results are presented of acceptance tests conducted on the Alternator Stator, S/N 002, for the Kilowatt Isotope Power System. These results show that the Alternator Stator, S/N 002 for the Kilowatt Isotope Power System has satisfactorily completed the testing set forth within Sundstrand Test Specification 2538. Test requirements of TS 2538 were extracted from the Kilowatt Isotope Power System, and Phase I Test Plan.
Date: April 25, 1978
Creator: Brainard, E.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Research in radiation monitoring survey instrumentation. Final report

Description: Two low-power solid-state prototype readout units were developed, an LED display and a LCD display. This display output was in a bar-graph format, covering four-decades of information, with 10-segments per decade. The displays accept a frequency input, which is standardly available from several portable radiation-survey instruments. Both readout units will operate on two D-cell batteries (3.0 Volt), with a typical current drain requirement of 0.3 MA for the LED display and 30..mu..A for the LCD… more
Date: January 20, 1978
Creator: Blalock, T. V.; Kennedy, E. J.; Phillips, R. G. & Walker, E. W. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical properties of 0. 2 g/cm/sup 3/ polystyrene bead foam

Description: In order to better interpret the results from a strain gage investigation of the effects of stress induced by polystyrene bead foam (PSBF) on electronic devices, the tensile and compressive properties of 0.2 g/cm/sup 3/ potting PSBF needed to be determined. These data are also required for mathematical models being employed to predict the force PSBF may exert on components. The properties were determined to be a function of temperature and residual pentane (blowing agent) content at -54/sup 0/,… more
Date: January 1, 1978
Creator: Fossey, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Programmable data acquisition system for microwave calibration

Description: A fully automated, programmable data acquisition system has been developed to record by printout or on punched paper tape the data for microwave power calibration. The system programs, controls, and receives BCD, analog, and ASCII information from external instrumentation. Construction, requirements, and operation of the system are described, and wiring diagrams are included.
Date: January 1, 1978
Creator: Cable, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Event matrix system. [To eliminate high-rate backgrounds]

Description: The number of background events in nuclear and particle physics experiments which use multiwire proportional chambers can be extremely high. Using a computer to resolve these events results in a high deadtime for the experiment. A fast matrix system for decreasing the number of background events is described in this report. 4 figures.
Date: March 1, 1978
Creator: Dalton, C.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

VORP, an improved detector system for remote measurements. [Voltage Output Radiation Probe for ionization chamber readout for underground nuclear explosion diagnostics]

Description: The Voltage Output Radiation Probe (VORP) is used as the detector to monitor radiological data on underground nuclear tests at the Department of Energy (DOE) Nevada Test Site. The VORP was designed to convert the current output of a Neher-White ionization chamber to a voltage output. There are several advantages in having a voltage output device rather than a low current probe in the field. The VORP makes it easier to protect against transients induced in the field wires. It also allows the use… more
Date: January 1, 1978
Creator: Smale, R.F. & Backsen, M.H.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improved methods of fabricating multilayer printed wiring boards. Final report

Description: A reliable process for the fabrication of multilayer printed wiring boards has been further improved by implementing a solder-dip-and-level process in place of the conventional pattern-tin-lead-plate process. A commercial chronic acid etchant has proven to be superior to the previously used sulfuric acid etchback solution. An economical, disposable polyvinyl-fluoride-film release sheet has been adopted, and a nuclear static-electricity eliminator has proven effective in providing lint-free pane… more
Date: January 1, 1978
Creator: Wilson, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser flow cytophotometric light scatter and fluorescence time-of-flight sizing of mammalian cells. [Use of pulse width or pulse rise time measurements]

Description: In laser flow cytophotometry, an increasingly popular technique of analytical cytology, quantitative measurements of interest include cell and nuclear diameters. Electronic circuitry for a new method of time-of-flight cell sizing was developed which measures the time that signal pulses from either fluorescence or light scatter sensors exceed a preset constant fraction of the peak signal amplitude (pulse width) or the time that it takes a signal to rise between constant fractions of the peak sig… more
Date: January 1, 1978
Creator: Leary, J.F.; Todd, P.; Wood, J.C.S. & Jett, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Charge-coupled device high-frequency drivers and testing instruments

Description: A versatile four-phase CCD testing instrument capable of operating at clock frequencies of from 100 MHz to 250 MHz is described. The testing instrument has been designed to satisfy necessary requirements for testing CCD's intended for use in analog signal recorders for sampling and time expansion of transient signals. The testing instrument has the capability of switching the high clock driver frequency to a lower CCD readout frequency and supplying the required signals at appropriate levels fo… more
Date: January 1, 1978
Creator: Leskovar, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Energy-dependent losses in pulsed-feedback preamplifiers

Description: Energy dependent counting losses occur in most pulsed-feedback preamplifiers due to the loss of those pulses which activate the recharge system. A pulsed-feedback system that overcomes this inefficiency is described. Pulsed-light feedback as used with germanium gamma-ray spectrometers is discussed as used at high energies and high rates where those losses become significant. Experimental results are presented.
Date: November 1, 1978
Creator: Landis, D. A.; Madden, N. W. & Goulding, F. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

TMX magnet control system

Description: A control system utilizing a microcomputer has been developed that controls the power supplies driving the Tandem Mirror Experiment (TMX) magnet set and monitors magnet coil operation. The magnet set consists of 18 magnet coils that are driven by 26 dc power supplies. There are two possible modes of operation with this system: a pulse mode where the coils are pulsed on for several seconds with a dc power consumption of 16 MW; and a continuous mode where the coils can run steady state at 10 perc… more
Date: November 12, 1978
Creator: Goerz, D.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Triggering at Isabelle; the first 200 nanoseconds

Description: At full luminosity of ISABELLE and with an anticipated pp total cross section of 60 mb, there will be, on the average, one interaction every 70 ns. At the other end of the spectrum, it will probably take about 10 ms to store a complete event onto magnetic tape. In between these two extremes comes a triggering scheme which must select the one event out of 14,285,714 that is of interest to the experimenter. In a typical experiment, a certain small number of signals will come into an electronics t… more
Date: July 1, 1978
Creator: Abshire, G.; Kondo, K.; Sculli, J.; Johnson, R. A. & Morris, G. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Process effects on high voltage electrical assembly performance. Final report

Description: Manufacturing processes and package configurations that affect the operation of some high voltage electrical assemblies have been evaluated. High voltage breakdown, adhesion problems, and encapsulated component and solder joint breakage have been relieved by improvements in residue analysis, cleaning and coating techniques, and stress relief coatings. A quantitative comparison of encapsulated lead stress relief systems has been completed to determine their effect on both component and solder jo… more
Date: August 1, 1978
Creator: Cummings, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fusion reactor requirements and systems for energy storage and transfer

Description: Energy storage and transfer requirements for many of the present day reactor systems are listed. Two ohmic heating (OH) requirements, those for toroidal Z-pinches and Tokamaks, are described in more detail. Technologies envisioned for the power conditioning circuitry are discussed.
Date: May 8, 1978
Creator: Thomassen, K.I.; Hagenson, R.L. & Thullin, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design of a single coil double resonance NMR probe for combined magic angle spinning double resonance experiments

Description: A design of the r.f. circuitry for a single coil double resonance NMR probe is presented. The design is useful for NMR double resonance experiments at two widely separated frequencies. The design is characterized by relatively high power efficiency, high isolation between the two frequencies used, and excellent signal-to-noise ratios for the detected NMR frequency. Using this design, most single frequency probes can be easily modified for double resonance experiments.
Date: March 1, 1978
Creator: Murphy, P.D. & Gerstein, B.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Beam profile monitor. [4 drawings (separate from report)]

Description: A system used to monitor secondary beam profiles at the LAMPF Linac for channel tune-up and diagnostics is described. The multiwire proportional chamber design is discussed, and descriptions and drawings of the gate card, the amplifier/multiplexer card, the output amplifier card, and the overall system are given. (PMA)
Date: May 1, 1978
Creator: Krausse, G.J. & Gram, P.A.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Research and development of improved geothermal well logging techniques, tools and components (current projects, goals and status). Final report

Description: One of the key needs in the advancement of geothermal energy is availability of adequate subsurface measurements to aid the reservoir engineer in the development and operation of geothermal wells. Some current projects being sponsored by the U. S. Department of Energy's Division of Geothermal Energy pertaining to the development of improved well logging techniques, tools and components are described. An attempt is made to show how these projects contribute to improvement of geothermal logging t… more
Date: January 1, 1978
Creator: Lamers, M. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of multiple faults in synchronous sequential circuits by Boolean difference techniques

Description: The Boolean difference is a mathematical concept which has found significant application in the study of single and multiple ''stuck at'' faults in combinational logic circuits. The concept of vector Boolean difference is extended to the analysis of multiple stuck-at faults in synchronous sequential circuits. A vector Boolean difference technique is utilized to determine the set of input/state pairs that will produce a difference in either output or next-state between the fault-free and faulty … more
Date: April 1, 1978
Creator: Goldstein, L.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wide range constant current power supply. [10/sup -10/ to 10/sup -2/ A; for measuring current--voltage characteristics of fuel cell electrodes]

Description: A calibrated, constant-current power supply has been constructed with a total current range of 10/sup -10/ A to 10/sup -2/ A, with continuously variable current output on each decade range. The current is accurate to one percent over all ranges except the two lowest ranges, where the accuracy is between one and two percent. The design utilizes only elementary operational amplifier circuitry. Three operational amplifiers and a regulated 15 V power supply are the only active circuit elements requ… more
Date: February 1, 1978
Creator: Weber, M.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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