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in subjects: "Electronic Circuits"

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The limited streamer tubes system for the SLD warm iron calorimeter

The SLD detector at the Stanford Linear Accelerator Center is a general purpose device for studying e{sup +}{epsilon}{sup {minus}} interaction at the Z{sup 0}. The SLD calorimeter system consists of two parts: a lead Liquid Argon Calorimeter (LAC) with both electromagnetic (22 radiation lengths) and hadronic sections (2.8 absorption lengths) housed inside the coil, and the Warm Ion limited streamer tubes Calorimeter (WIC) outside the coil which uses as radiator the iron of the flux return for t… more

Date: January 1, 1992

Creator: Benvenuti, A. C.; Camanzi, B.; Piemontese, L.; Zucchelli, P.; Calcaterra, A.; De Sangro, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Diskless LSI-11 systems

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: Article

Partner: UNT Libraries Government Documents Department

open access

Surprising patterns of CMOS susceptibility to ESD and implications on long-term reliability

CMOS electrostatic discharge (ESD) failures in a product where, by design, the device input terminals are not accessible to ESD led to this study of device susceptibility and an analysis of the long-term reliability of devices in assemblies from that production line. Some surprising patterns of device susceptibility are established and it is shown that the probability of long-term failure in devices whose electrical characteristics have been degraded by electrostatic discharge is small.

Date: January 1, 1980

Creator: Schwank, J.R.; Baker, R.P. & Armendariz, M.G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Programmable multi-timer for TRU waste analysis applications

A programmable, multiple-function timing module has been developed for use in transuranic (TRU) waste analysis applications at the Idaho National Engineering Laboratory. The Programmable Multi-Timer (PRMT) is an expanded version of a module originally built for accelerator-based active photon interrogation experiments. During the course of the experiments, it became obvious that a more versatile timer was needed to meet several unforeseen requirements. The PRMT was designed to meet the new requ… more

Date: January 1, 1981

Creator: Lawrence, R.S.; Nieschmidt, E.B. & Tsang, F.Y.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Issues for trigger processing at high luminosity colliders

A number of issues for the design of trigger processors at future high-luminosity, high-energy colliders such as the Superconducting Super Collider and the Large Hadron Collider are discussed.

Date: November 1, 1989

Creator: Lankford, A.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Development of a low intensity current monitor system

This report documents the development of a current transformer system used to measure pulsed ion beam currents with a wide dynamic intensity range (nA to mA, and factor of 10{sup 6}). Peak beam currents at the LAMPF accelerator typically range from 100 to nA to 40 mA with pulse widths varying from 30 to 1000 {mu}s. Signal conditioning of the peak current output provides an average current readout with a range of 1 nA to 2 mA, noise of approximately {plus minus}0.5 nA, and accuracy of {plus minu… more

Date: January 1, 1991

Creator: Gallegos, F.R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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ORMAK upgrade ohmic coil generator protection

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: Report

Partner: UNT Libraries Government Documents Department

open access

Fermilab 200 MeV linac control system hardware

This report is a description of the present Linac distributed control system that replaces the original Xerox computer and interface electronics with a network of 68000-based stations. In addition to replacing the obsolete Xerox equipment, goals set for the new system were to retain the fast response and interactive nature of the original system, to improve reliability, to ease maintenance, and to provide 15 Hz monitoring of all Linac parameters. Our previous experience with microcomputer insta… more

Date: January 1, 1984

Creator: Shea, M.F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Avalanche transistor pulser for fast-gated operation of micro-channel plate image-intensifiers

Transistors operated in the avalanche mode are employed to generate a 1000 volt 10 to 30 nsec wide pulse with less than 4 nsec rise and fall times. This pulse is resistively attenuated to approximately equal to 270 volts and drives the image intensifier tube which is a load of approximately equal to 200 pf. To reduce stray inductance and capacitance, transistor chips were assembled on a thick-film hybrid substrate. Circuit parameters, operating conditions, and coupling to the microchannel plate… more

Date: January 1, 1977

Creator: Lundy, A.; Parker, J. R.; Lunsford, J. S. & Martin, A. D.

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. Annual progress report

Short term objectives for well-logging instrumentation are circuits which can operate at temperatures in the range 275/sup 0/C to 350/sup 0/C; the medium term goal is operation up to 500/sup 0/C, and the long term goal is to achieve operation at 1000/sup 0/C. It is apparent that useful electronic circuits will require the combination of both passive components and active devices. In order to meet the compatibility requirements, the basic technology which has been selected in this project is the… more

Date: October 20, 1977

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

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A study of tau decays of the W boson at CDF (Collider Detector at Fermilab)

A report is given of a search for tau decays of the W boson in p{bar p} collisions at {radical}s = 1.8 TeV using the Collider Detector at Fermilab (CDF). A description of a hardware trigger specifically designed to enhance the number of events with tau decays is presented along with the results of a preliminary analysis of data taken during the 1988--89 run of CDF. 10 refs., 4 figs.

Date: January 3, 1990

Creator: Gladney, L. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

New generation of arc and arc filament power supplies for pulsed neutral beams

The new Tandem Mirror Experiment (TMX) facility at LLL requires that neutral beams operate for pulse lengths between 25 and 100 ms. The inevitable increase in cost over the present 12-ms pulse length capability dictated that a more economical alternative to the pulse forming networks and the transformer-type arc filament power supplies currently in use be found. A study of the various alternatives and design requirements revealed that battery banks are the most economical alternative. The therm… more

Date: October 3, 1977

Creator: Santamaria, G.T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Advanced accelerator research at Argonne

A facility with which to experimentally measure methods of advanced acceleration is at the point of completion at Argonne National Laboratory. The new facility consists a system which produces pulse ''doublets'' of energetic electrons, pulse shaping hardware, a space for experimental apparatus, and a high resolution spectrometer. The leading 21 MeV pulse in a doublet can contain up to 15 nano-coulombs of charge and can be adjusted to be from 6 to over 100 pic-seconds in length. The trailing dou… more

Date: January 1, 1986

Creator: Konecny, R.; MacLachlan, J.; Norem, J.; Ruggiero, A.; Schoessow, P. & Simpson, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

H5 fast-kicker-magnet pulser

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: Article

Partner: UNT Libraries Government Documents Department

open access

Structural analysis of the central Columbia Plateau utilizing radar, digital topography, and magnetic data bases

Interest in the Hanford site (Washington) as a nuclear production, power, and waste disposal site has led to generation of a vast quantity of geophysical and remote sensing data sets of the central Columbia Plateau. To data, these various studies, including at least 13 independent magnetic linear and image lineament studies, have not been adequately correlated. Therefore, these studies provide a unique opportunity to compare and contrast the viability of the different geophysical and remote sen… more

Date: August 1, 1991

Creator: Thiessen, R. L.; Eliason, J. R.; Johnson, L. K.; Brougher, C. W. (Washington State Univ., Pullman, WA (United States). Dept. of Geology); Foley, M. G. & Beaver, D. E. (Pacific Northwest Lab., Richland, WA (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Factors affecting visual inspection of thin film network

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: Report

Partner: UNT Libraries Government Documents Department

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Gas breakers for tokamak OHMIC-heating duty

The current interrupting capacity of air blast and SF/sub 6/ breakers is reviewed for application in tokamak ohmic-heating circuits. Particular attention is paid to generator breakers for their large current interrupting capacity and suitability for ohmic-heating circuits.

Date: January 1, 1977

Creator: Vogel, H.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Titanium/gold process characterization

Characterization of the titanium/gold (Ti/Au) deposition process used at the Allied-Signal Inc., Albuquerque Microelectronics Operation (AMO) was performed. Tests were conducted to set up evaporation parameters, correlate titanium and gold thicknesses to sheet resistance, improve thickness uniformity, and reduce frontside contamination of deposit material on product wafers. The Ti/Au process is the final step in the production of integrated circuits (ICs) at the AMO wafer fabrication facility. … more

Date: November 1, 1991

Creator: Fajardo, L.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Technical Area 55 Entry Control System (ECS). [Plutonium facilities]

The exchange badge system which was used at the Plutonium Facility located in Technical Area 55 was replaced on a trial basis with an automated Entry Control System. As a result of the success of the trial system, a new system incorporating expanded features and increased reliability is being implemented. The new Entry Control System incorporates several features not previously available in relatively inexpensive entry systems. The reliability of the system is enhanced by redundant microprocess… more

Date: January 1, 1984

Creator: Beaumont, A.; Brundige, E.; DesJardin, R. & Rivera, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Computer-Controlled System for Rapid Soil Analysis of /sup 226/Ra

A computer-controlled multichannel analysis system has been developed by the Radiological Survey Activities Group at Oak Ridge National Laboratory (ORNL) for the Department of Energy (DOE) in support of the DOE's remedial action programs. The purpose of this system is to provide a rapid estimate of the /sup 226/Ra concentration in soil samples using a 6 x 9-in. NaI(Tl) crystal containing a 3.25-in. deep by 3.5-in. diameter well. This gamma detection system is controlled by a mini-computer with … more

Date: January 1, 1984

Creator: Doane, R. W.; Berven, B. A. & Blair, M. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The electronics and data acquisition system for the Wire Imaging Synchrotron Radiation Detector at the SLC (Stanford Linear Collider)

The Stanford Linear Collider (SLC) located at the Stanford Linear Accelerator Center collides electrons and positrons produced in the linear accelerator pulse by pulse. We determine the energy of each beam by measuring the angle of deflection of the beam in the SLC extraction lines. Each extraction line consists of two bending magnets that produce synchrotron radiation, and a spectrometer analyzing magnet that deflects the beam. We detect the synchrotron light by using the emission of electrons… more

Date: January 1, 1990

Creator: Rouse, F.; Briggs, D.D. (Stanford Linear Accelerator Center, Menlo Park, CA (USA)); Gomez, J.J.; Von Zanthier, C. & Kent, J. (California Univ., Santa Cruz, CA (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Energy and technology review

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: Report

Partner: UNT Libraries Government Documents Department

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A many particle-tracking detector with drift planes and segmented cathode readout

We describe the design and performance of a detector system for tracking charged particles in an environment of high track density and rates up to 1 MHz. The system operates in the forward spectrometer of the BNL Heavy Ion experiment E814 and uses principles of general interest in high rate, high multiplicity applications such as at RHIC or SSC. We require our system to perform over a large dynamic range, detecting singly charged particles as well as fully ionized relativistic {sup 28}Si. Resul… more

Date: January 1, 1990

Creator: Fischer, J.; Lissauer, D.; Ludlam, T.; Makowiecki, D.; O'Brien, E.; Radeka, V. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Effect of Au on the reliability of fine pitch surface mount solder joints

The effect of Au on the reliability of 0.65 mm pitch surface mount solder joints between plastic quad flat packs and Cu-Ni-Au FR-4 printed circuit boards was investigated. Cu-Ni-Au is a desirable printed circuit board finish for multi-chip modules or printed circuit boards that would otherwise require a selective Au finish, for example for edge connectors or wire bondable parts. However, Au is known to embrittle solder when it is present in sufficiently high concentrations, creating a concern t… more

Date: May 1, 1991

Creator: Glazer, J. (Hewlett-Packard Co., Palo Alto, CA (United States)); Kramer, P. & Morris, J.W. Jr. (Lawrence Berkeley Lab., CA (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department