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Diskless LSI-11 systems

Description: Programs for dedicated LSI-11 based systems can easily be stored in ROM instead of floppy disks, yet execute the same as disk-stored programs. Two sample systems are described.
Date: January 1, 1982
Creator: Ford, W. & Shirk, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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H5 fast-kicker-magnet pulser

Description: The fast extraction kicker magnet for the AGS is powered by a novel pulse generator. A pulse forming network (PFN) is discharged into nearly 100% mismatched load. The pulser delivers a current pulse of 3000 amperes peak pulse with a 2% flat-top ripple into a 1.4 ..mu.. H single turn ferrite core magnet. The pulse is 2.8 ..mu..sec wide with a 180 nsec rise time, at a 0.5 to 1.5 pps repetition rate. The pulse rise time is required to provide clean extraction of the 28 GeV proton beam by bringing … more
Date: January 1, 1982
Creator: Frey, W.; Ghoshroy, S. & Cottingham, J.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy and technology review

Description: Three areas of research are discussed: microcomputer technology applied to inspecting machined parts to determine roundness in ultraprecision measurements; development of an electrolytic technique for preparing dinitrogen pentoxide as a potentially less expensive step in the large-scale synthesis of the explosive HMX; and the application of frequency conversion to short wavelengths in the Novette and Nova lasers to improve the performance of inertial-confinement fusion targets. (GHT)
Date: August 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fast-timing methods for semiconductor detectors

Description: The basic parameters are discussed which determine the accuracy of timing measurements and their effect in a practical application, specifically timing with thin-surface barrier detectors. The discussion focusses on properties of the detector, low-noise amplifiers, trigger circuits and time converters. New material presented in this paper includes bipolar transistor input stages with noise performance superior to currently available FETs, noiseless input terminations in sub-nanosecond preamplif… more
Date: March 1, 1982
Creator: Spieler, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pocket neutron REM meter

Description: This paper describes a pocket-calculator-sized, neutron-sensitive, REM-responding personnel dosimeter that uses three tissue-equivalent cylindrical proportional counters as neutron-sensitive detectors. These are conventionally called Linear Energy Transfer (LET) counters. Miniaturized hybrid circuits are used for the linear pulse handling electronics, followed by a 256-channel ADC. A CMOS microprocessor is used to calculate REM exposure from the basic rads-tissue data supplied by the LET counte… more
Date: January 1, 1982
Creator: Quam, W.; Del Duca, T.; Plake, W.; Graves, G.; DeVore, T. & Warren, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Overview of pulsers for nanosecond gating of image-shutter tubes

Description: The capability of generating a useful optical shutter of a few nanoseconds or less utilizing gated proximity-focussed microchannel-plate (MCP) wafer tubes or silicon intensified target (SIT) vidicon tubes depends strongly on the driving electrical pulse. This paper will provide a summary of some of the electrical gate pulsers utilized in studying both proximity-focussed MCP imaging intensifiers and gated SIT FPS vidicon tubes. (WHK)
Date: January 1, 1982
Creator: Yates, G.J.; Ogle, J.W.; King, N.S.P. & Aeby, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Short circuit detection in the winding and operation of superconducting magnets

Description: 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: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Image Shutters: Gated Proximity-Focused Microchannel-Plate (MCP) Wafer Tubes vs Gated Silicon Intensified Target (SIT) Vidicons

Description: 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: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development and evaluation of systems for controlling parallel high di/dt thyratrons

Description: 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: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dynamic positron emission tomography in man using small bismuth germanate crystals

Description: 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: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Summary of transient high-voltage calculations for the FRX-C experiment

Description: Calculations of the electrical circuit equations are performed over a wide range of parameters corresponding to the FRX-C field-reversed THETA-pinch experiment at Los Alamos. Without any plasma or external damping, serious voltage doubling and quadrupling of the main capacitor bank charge voltage are observed. These oscillating high voltages are found to be adequately suppressed by the strategic placement of external snubber circuitry. On the other hand, no doubling of the THETA-pinch preioniza… more
Date: June 1, 1982
Creator: Kewish, R.W. Jr. & Rej, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Subsystem engineering and development of grid-connected photovoltaic systems

Description: The experience gained in fielding residential and intermediate sized photovoltaic application experiments is summarized. This experience is used to guide the engineering and development of array and power conditioning subsystems for grid-connected photovoltaic systems. A major consideration in this development effort is cost. Through innovative engineering, using a modular building block approach for the array subsystem, it is now possible to construct array fields, in moderate quantities, for … more
Date: January 1, 1982
Creator: Burgess, E. L.; Post, H. N. & Key, T. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design of a fast-rise slow-fall magnet modulator

Description: Brookhaven National Laboratory is now in the process of expanding the capability of the AGS to include the acceleration of polarized protons. One of the requirements to accomplish this is to pulse twelve quadrupole magnets to rapidly cross depolarizing resonances. Having crossed the resonance, the field in the magnet must be maintained so as not to re-cross the resonance. The problem is addressed with two mirror image circuits, one to produce positive pulses, and the other negative. Each of the… more
Date: January 1, 1982
Creator: Lambiase, R.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multiplicity sorter for shift-register coincidence electronics

Description: A multiplicity sorter for the latest Los Alamos National Laboratory version of shift-register coincidence electronics is described. The multiplicity information taken from the coincidence-gate up-down counter is decoded and gated onto the output lines by prompt real-plus-accidental (R+A) and delayed accidental (A) strobes. Multiplicities of 0-7 and greater than or equal to 8 are sorted for both the R+A and A gates.
Date: February 1, 1982
Creator: Swansen, J. E.; Collinsworth, P. R.; Krick, M. S. & Peterson, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Power-conditioning system for the Advanced Test Accelerator

Description: The Advanced Test Accelerator (ATA) is a pulsed, linear induction, electron accelerator currently under construction and nearing completion at Lawrence Livermore National Laboratory's Site 300 near Livermore, California. The ATA is a 50 MeV, 10 kA machine capable of generating electron beam pulses at a 1 kHz rate in a 10 pulse burst, 5 pps average, with a pulse width of 70 ns FWHM. Ten 18 kV power supplies are used to charge 25 capacitor banks with a total energy storage of 8 megajoules. Energy… more
Date: June 1, 1982
Creator: Newton, M. A.; Smith, M. E.; Birx, D. L.; Branum, D. R.; Cook, E. G.; Copp, R. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Basic photovoltaic principles and methods

Description: This book presents a nonmathematical explanation of the theory and design of photovoltaic (PV) solar cells and systems. The basic elements of PV are introduced: the photovoltaic effect, physical aspects of solar cell efficiency, the typical single-crystal silicon solar cell, advances in single-crystal silicon solar cells. This is followed by the designs of systems constructed from individual cells, including possible constructions for putting cells together and the equipment needed for a practi… more
Date: February 1, 1982
Creator: Hersch, P. & Zweibel, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Implementation of a fully reconfigurable multimicroprocessor

Description: The fully reconfigurable multimicroprocessor is an experimental configuration designed specifically as a research tool for implementing and evaluating parallel-processing algorithms on various multiprocessor architectures. Basically, the system is a shared-memory MIMD (multiple instruction-multiple data stream) machine that supports reconfiguration between processor and memory nodes to permit experimentation on architectures sharing common memory, networks of processors with only local memory, … more
Date: January 1, 1982
Creator: Trujillo, V.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Coal-hydrogasification process development. Quarterly technical progress report, January 2, 1982-April 2, 1982

Description: Principal activities were related to the ongoing receipt and acceptance test monitoring of advance procured components for the 3/4-TPH IPDU facility. Also continued were engineering contacts with two valve suppliers experiencing manufacturing problems with advance procured components. Both of these manufacturers appear to have solved their problems. Previously-ordered equipment such as the integral orifice delta-P flow transmitters and pressure gages were received. Final system configuration ch… more
Date: April 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

On-Shore Processing

Description: A proposal is made to use a fast trigger processor to utilize the data acquisition system proposed at this workshop.
Date: April 1, 1982
Creator: Theriot, D.; Brenner, A. E.; Dau, W. D.; Geelhood, B. D.; Harris, F.; Learned, J. G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Microprocessors in detectors and analysis

Description: The increasing need in high energy physics experiments for computation power for both online and offline applications, coupled with the current microprocessor revolution, has led to the examination of the use of microprocessors in various aspects of HEP computing. A brief (and admittedly somewhat biased) review is given of current hardware products, the costs of developing and producing hardware systems, and the costs of providing appropriate software support tools which allow one to make effec… more
Date: January 1, 1982
Creator: Siskind, E.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Apparatus for dynamic measurement of gases released from materials heated under programmed temperature-time control

Description: This apparatus, a prototype of one being constructed for hotcell examination of irradiated nuclear materials, measures dynamic release rates and integrated volumes of individual gases from materials heated under controlled temperature-time programs. It consists of an inductively heated vacuum furnace connected to a quadrupole mass spectrometer. A computerized control system with data acquisition provides scanning rates down to 1s and on-line tabular and graphic displays. Heating rates are up to… more
Date: April 1, 1982
Creator: Early, J.W. & Abernathey, R.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New 1-k PROM for the coincidence-counter electronics package

Description: A new programmable read-only memory (PROM) for the Los Alamos-designed neutron coincidence electronics package is described. The new 1-k PROM allows remote control of the electronics by a computer or a remote terminal through an RS-232 serial data port. No modifications of the existing unit are required.
Date: February 1, 1982
Creator: Swansen, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Integration of microcomputers into a network

Description: Discussed is the evolution of the large, extremely complex Integrated Computing Network at the Los Alamos National Laboratory and the integration of microcomputers as computer-based work stations into that network. Of key concern is the specification of a work station that is not directed toward a particular manufacturer, but rather toward software tools that are portable and that can be implemented readily on equipment from various manufacturers.
Date: January 1, 1982
Creator: Sparks, D. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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