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in subjects: "Electronic Circuits"

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Design of a photovoltaic central power station

Photovoltaic central power station designs have been developed for both high-efficiency flat-panel arrays and two-axis tracking concentrator arrays. Both designs are based on a site adjacent to the Saguaro Power Station of Arizona Public Service. The plants are 100 MW each, made of 5 MW subfields. The site specific designs allow detailed cost estimate for site preparation, installation, and engineering. These designs are summarized and cost estimates analyzed. Provided also are recommendations … more

Date: February 1, 1984

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

SLIFER Decipher

The SLIFER Decipher (SD) is a digital instrument that records a time-varying frequency signal in the range from 700 kHz to 1500 kHz with an amplitude greater than 200 mV. This signal is referenced to an input fiducial marker. The primary purpose of this instrument is to reduce data recorded on magnetic tape from the SLIFER system used in underground nuclear tests. The SD records 512 samples after the fiducial signal, with a sample interval of 50 ..mu..s (for a total recording time of 25.55 ms).… more

Date: October 1, 1977

Creator: Breding, D.R.; Worthen, G.S.; Loukota, J.J.; Fogel, D. & Watterberg, J.P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Short circuit detection in the winding and operation of superconducting magnets

Three categories of shorts will be discussed: (1) shorts to the metallic bobbin or other structural elements, (2) shorts between turns caused by instrumentation wires that are deliberately connected to a turn at the end (e.g., voltage taps) and that short out to another turn but are not completely severed in the process, and (3) short circuits between turns caused by direct contact due to insulation failure by chips of metal bridging turns and by instrumentation wires that bridge turns but are … more

Date: January 1, 1982

Creator: Walstrom, P.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Image Shutters: Gated Proximity-Focused Microchannel-Plate (MCP) Wafer Tubes vs Gated Silicon Intensified Target (SIT) Vidicons

The imaging characteristics of two fast image shutters used for recording the spatial and temporal evolution of transient optical events in the nanosecond range have been studied. Emphasis is on the comparative performances of each shutter type under similar conditions. Response data, including gating speed, gain, dynamic range, shuttering efficiency, and resolution for 18 and 25-mm-diam proximity-focused microchannel-plate (MCP) intensifiers are compared with similar data for a prototype elect… more

Date: January 1, 1982

Creator: Yates, G. J.; King, N. S. P.; Jaramillo, S. A.; Ogle, J. W.; Noel, B. W. & Thayer, N. N.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

SEM technique for experimentally locating latch-up paths in integrated circuits

A technique is presented for using the scanning electron microscope (SEM) in the electron-beam-induced current (EBIC) mode to delineate latch-up paths in CMOS ICs. In the EBIC mode, the current produced by the collection and separation of the electron-beam-generated electron-hole pairs in the space charge regions of the device is measured and used to form an image. Since the collection of these carriers is dependent on space charge region width (and thus junction potential), anything that alter… more

Date: January 1, 1980

Creator: Dressendorfer, P. V. & Armendariz, M. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

SCR series switch and impulse crowbar at the Lawrence Berkeley Laboratory for CTR neutral beam source development

The series switch is designed to operate at 120kV and pass 65A for 0.5 sec every 30 sec on the Lawrence Berkeley Laboratory CTR Neutral Beam Source Test Stand IIIB. The series switch consists of 400 individual SCR circuits connected in series and is turned on by a simple system of cascaded pulse transformers with multiple single turn secondaries each driving the individual SCR gates. It is turned off by an SCR impulse crowbar that momentarily shorts the power supply allowing the series switch t… more

Date: October 1, 1977

Creator: Franck, J. V.; Arthur, A. A.; Brusse, L. A. & Low, W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Surface Underground Coincidences at the Soudan Mine

A 37 m{sup 2} surface array which has been operating in coincidence with the Soudan 1 underground experiment is described. A comparison is made between measured and expected underground-surface coincident events. The surface array is used to tag'' the energy of the cosmic ray primary. Distributions of event rates and multiple muon rates as a function of energy are shown. Expected rates and plans for an enhanced array and for coincidences with Soudan 2 are also discussed. 1 ref., 6 figs.

Date: January 1, 1989

Creator: DasGupta, U.; Ambats, I.; Ayres, D.; Alner, G. J.; Balka, L.; Barr, G. D. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The development of controls for pulse-to-pulse modulation at the Brookhaven AGS complex

Operation of the AGS Complex, comprising a 200 MeV Linac, the 1.5 GeV Booster (400 MeV/amu heavy ions) which is under construction, and the AGS, requires service of multiple uses with different beam requirements. Local Linac users, Booster commissioning with protons and heavy ions, and the AGS physics program and accelerator studies must run concurrently in various combinations. A new timing system is being built which will distribute serially encoded events derived from real-time and magnetic … more

Date: January 1, 1989

Creator: Barton, D. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Development and evaluation of systems for controlling parallel high di/dt thyratrons

Increasing numbers of high power, high repetition rate applications dictate the use or thyratrons in multiple of hard parallel configurations to achieve the required rate of current rise, di/dt. This in turn demands the development of systems to control parallel thyratron commutation with nanosecond accuracy. Such systems must be capable of real-time, fully-automated control in multi-kilohertz applications while still remaining cost effective. This paper describes the evolution of such a contro… more

Date: January 1, 1982

Creator: A., Litton. & McDuff, G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Readout and triggering of the Soudan 2 nucleon decay experiment

No Description Available.

Date: January 1, 1984

Creator: Thron, J. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Design of the ZT-40 power crowbar system

The design for a power crowbar system for ZT-40 to sustain a total current greater than 10/sup 7/ A with less than a 7% variation for 250 ..mu..s is discussed. The circuit performance without the power crowbar system is used to determine the power required. Several methods for supplying the power crowbar energy were investigated and simulated before choosing the final system. The advantages and disadvantages of the various options are also presented.

Date: January 1, 1977

Creator: Nunnally, W.C. & Boicourt, G.P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Dynamic positron emission tomography in man using small bismuth germanate crystals

Primary considerations for the design of positron emission tomographs for medical studies in humans are the need for high imaging sensitivity, whole organ coverage, good spatial resolution, high maximum data rates, adequate spatial sampling with minimum mechanical motion, shielding against out of plane activity, pulse height discrimination against scattered photons, and timing discrimination against accidental coincidences. We discuss the choice of detectors, sampling motion, shielding, and ele… more

Date: April 1, 1982

Creator: Derenzo, S.E.; Budinger, T.F.; Huesman, R.H. & Cahoon, J.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

SSC physics signatures and trigger requirements

Strategies are considered for triggering on new physics processes on the environment of the SSC, where interaction rates will be very high and most new physics processes quite rare. The quantities available for use in the trigger at various levels are related to the signatures of possible new physics. Two examples were investigated in some detail using the ISAJET Monte Carlo program: Higgs decays to W pairs and a missing energy trigger applied to gluino pair production. In both of the examples … more

Date: January 1, 1985

Item Type: Article

Partner: UNT Libraries Government Documents Department

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General purpose computers in real time

I see three main trends in the use of general purpose computers in real time. The first is more processing power. The second is the use of higher speed interconnects between computers (allowing more data to be delivered to the processors). The third is the use of larger programs running in the computers. Although there is still work that needs to be done, I believe that all indications are that the online need for general purpose computers should be available for the SCC and LHC machines. 2 fig… more

Date: September 18, 1989

Creator: Biel, J.R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Detailed design, fabrication and testing of an engineering prototype compensated pulsed alternator. Final report

The design, fabrication, and test results of a prototype compensated pulsed alternator are discussed. The prototype compulsator is a vertical shaft single phase alternator with a rotating armature and salient pole stator. The machine is designed for low rep rate pulsed duty and is sized to drive a modified 10 cm Beta amplifier. The load consists of sixteen 15 mm x 20 mm x 112 cm long xenon flashlamps connected in parallel. The prototype compulsator generates an open circuit voltage of 6 kV, 180… more

Date: March 1, 1980

Creator: Bird Jr., W. L. & Woodson, H. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of the IRAD sonic extensometers for application in the Canadian Underground Research Laboratory (FY 1983)

This report supplements an earlier study that discussed the suitability of using the IRAD sonic extensometer in the Underground Research Laboratory proposed by the Atomic Energy of Canada, Ltd. In particular, it addresses the first and fourth recommendations made in that report concerning the basic accuracy of the instrument and evaluation of the electronic circuitry, respectively.

Date: September 1, 1983

Creator: Glenn, H.D. & Butler, L.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Intermediate photovoltaic system application experiment operational performance report. Volume 5 for Lovington Square Shopping Center, Lovington, NM

For the months of September and October, 1981, operational performance data are presented for a photovoltaic power system at a New Mexico shopping center. The electrical energy yield, incident solar energy, and efficiency of the solar cell array are given, including daily and monthly energy yield and insolation and efficiency, and energy yield as a function of power level, voltage, cell temperature, and hour of the day. Data are presented for two power conditioning units, including power condit… more

Date: December 1, 1981

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Effects of plasma-deposited silicon nitride passivation on the radiation hardness of CMOS integrated circuits

The use of plasma-deposited silicon nitride as a final passivation over metal-gate CMOS integrated circuits degrades the radiation hardness of these devices. The hardness degradation is manifested by increased radiation-induced threshold voltage shifts caused principally by the charging of new interface states and, to a lesser extent, by the trapping of holes created upon exposure to ionizing radiation. The threshold voltage shifts are a strong function of the deposition temperature, and show v… more

Date: January 1, 1980

Creator: Clement, J. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Isolated data acquisition system for high voltage applications

This report describes the design and operation of a microcomputer controlled system for acquisition of both analog and binary data within the high voltage stages of a linac modulator. The system is comprised of a microprocessor Controller which communicates with the remote data Acquisition circuits via an optical bus. The bus, which uses a 1 MHz Manchester II format, is configured as a loop, starting at the Controller, daisy-chaining the remote cards and terminating back at the Controller. Upon… more

Date: June 1, 1985

Creator: Waitz, A. & Donaldson, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Discharge circuits and loads

This will be an overview in which some of the general properties of loads are examined: their interface with the energy storage and switching devices; general problems encountered with different types of loads; how load behavior and fault modes can impact on the design of a power conditioning system (PCS).

Date: October 15, 1980

Creator: Sarjeant, W. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Participation in high energy physics, Task D

This report discusses the following topics: Communication and Advancement of High Energy Physics; B-Quarks; Secondary Vertex Trigger; and Science Education.

Date: April 1, 1992

Creator: Lederman, L.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Delay line proportional chambers for the Fermilab external muon identifier

Thirty-nine one meter square proportional chambers with delay line readout were constructed for the external muon identifier of the Fermilab 15 foot bubble chamber. They provide X,Y,U(45/sup 0/) and T (avalanche time) information using a single wire plane, etched strip cathodes and nine amplifiers. They have a time resolution of +-27ns, single particle spatial resolution of +-2 to +-3mm and double particle resolution of approximately 2/sup 1///sub 2/ to 4cm. The energy accessible to each wire i… more

Date: October 19, 1977

Creator: Parker, S.; Orthel, J. & Marriner, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Studies of. mu. prime s underground with the Soudan 2 Tracker

During the period July 1987 through March 1988, a section of the Soudan 2 active shield known as the Tracker' recorded {approximately}250,000 muon tracks. The detector is located in the Tower-Soudan State Park in Soudan, Minnesota USA at a depth of 2090 meters-water equivalent. We have analysed the data collected and searched for time-dependent astronomical sources. Distributions in azimuthal and zenith angles as well as declination and right ascension are shown. 1 ref., 7 figs., 1 tab.

Date: August 23, 1989

Creator: Kochocki, J.; Benjamin, D.; Ewen, B.; Kafka, T.; Mann, A.; McMaster, L. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Development of Passive Electronic Components for Instrumentation of Improved Geothermal Logging Tools and Components. Semiannual Progress Report. Report No. 1. [For Temperatures Up to 500/sup 0/C]

Research progress is reported on the development of passive components, resistors, capacitors, metallization, and passivation, that will withstand well logging temperatures to 500/sup 0/C and have extremely low temperature coefficients. The lower the temperature coefficients, the more exacting the instrumentation designs can be without elaborate compensation techniques. The method of fabricating the thin film components is that of chemical vapor deposition (CVD) which is a major deviation from … more

Date: April 20, 1977

Creator: Raymond, L. S.; Hamilton, D. J. & Kerwin, W. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department