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in subjects: "Digitizers"

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Development of a 10-bit 500 Msample/sec Waveform Digitizcr

The device reported is a simple, robust, low-cost device to sample fast analog signals and convert them into digital data. Goal is to utilize existingleCroy Front End developments and BNL previous efforts to: Extend the dynamic range from 8 to 9-10 bits; Extend the depth of memory; Lower the cost; and Increase availability to general research and industrial cornmunity.

Date: September 25, 1996

Creator: Atiya, M.; Padrazo, D.; Zhao, Y.; Sumner, R.; Untermeyer, U.; Carlson, B. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A Checkout of the Beam-Line's Beam Position Measurement Systems

This pbar note is to describe a recent checkout of the AP3, AP2, AP1 and P2 (F11 to F17) Beam Position Measurement (BPM) systems. The integrity of all BPMs (plates, cables, connectors and RF module) were performed. For each beam-line, the BPM positions polarity were checked: all of the horizontal (vertical) BPMs of a beam-line are to be consistent in defining left/right (up/down) by the sign of the position. The plates impedances have been measured. The position offsets at the output of the RF … more

Date: March 15, 2001

Creator: Gollwitzer, Keith

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Signal processing for longitudinal parameters of the Tevatron beam

We describe the system known as the Tevatron SBD [1] which is used to provide information on the longitudinal parameters of coalesced beam bunches in the Tevatron. The system has been upgraded over the past year with a new digitizer and improved software. The quantities provided for each proton and antiproton bunch include the intensity, the longitudinal bunch profile, the timing of the bunch with respect to the low-level RF, the momentum spread and the longitudinal emittance. The system is cap… more

Date: May 1, 2005

Creator: Pordes, S.; Crisp, J.; Fellenz, B.; Flora, R.; Para, A. & Tollestrup, A. V.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Characterization and Compensation of High Speed Digitizers

Increasingly, ADC technology is being pressed into service for single single-shot instrumentation applications that were formerly served by vacuum-tube based oscilloscopes and streak cameras. ADC technology, while convenient, suffers significant performance impairments. Thus, in these demanding applications, a quantitative and accurate representation of these impairments is critical to an understanding of measurement accuracy. We have developed a phase-plane behavioral model, implemented it in … more

Date: April 4, 2005

Creator: Fong, P; Teruya, A & Lowry, M

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Description and calibration beamline SEM/Ion Chamber Current Digitizer

This report discusses the following on beamline SEM/ion chamber current digitizers: Module description; testing and calibration; common setup procedures; summary of fault indications and associated causes; summary of input and output connections; SEM conversion constant table; ion chamber conversion constant table; hexadecimal to decimal conversion table; and schematic diagram.

Date: May 1, 1994

Creator: Schoo, D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

An Affordable Digitizer, Final Report

Design of prototype low cost high speed digitizers for physics applications

Date: January 4, 2009

Creator: Sumner, Dr. Richard

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Report on the Test and Evaluation of the Kinemetrics/Quanterra Q730B Borehole Digitizers

Sandia National Laboratories has tested and evaluated the Kinemetrics/Quanterra Q730B-bb (broadband) and Q730B-sp (short period) borehole installation remote digitizers. The test results included in this report were for response to static and dynamic input signals, seismic application performance, data time-tag accuracy, and reference signal generator (calibrator) performance. Most test methodologies used were based on IEEE Standards 1057 for Digitizing Waveform Recorders and P1241 (Preliminary… more

Date: October 1, 1999

Creator: KROMER,RICHARD P. & MCDONALD,TIMOTHY S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Multivideo image processing for beam profile monitoring system

Some experiments at Jefferson Lab demand tight beam size ({approx} 100 {mu}m) and very low energy spread (< 5 x 10{sup {minus}5}). These experiments also require simultaneous and continuous monitoring of these quantities. This paper focuses on the development of the image processing aspects of the beam profile monitoring system. A pipelined image processor, Datacube's MaxVideo MV200, calculates beam sizes and positions from two beam profile monitors simultaneously at 10 Hz rate. Multiplexing… more

Date: May 1, 2000

Creator: Hardy, D.; Chevstov, P.; Denard, J-C. & Dickson, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Modified Noise Power Ratio testing of high resolution digitizers

A broadband, full signal range, side-by-side (tandem) test method for estimating the internal noise performance of high resolution digitizers is described and illustrated. The technique involves a re-definition of the traditional Noise Power Ratio (NPR) test, a change that not only makes this test applicable to higher resolution systems than was previously practical, but also enhances its value and flexibility. Since coherence analysis is the basis of this new definition, and since the applicat… more

Date: May 1, 1994

Creator: McDonald, T. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Test definitions for the evaluation of digital waveform recorders.

This Test Definition for the Evaluation of Digitizing Waveform Recorders (DWR) defines the process that can be performed as part of the evaluation and testing of geophysical sensors, digitizers, sensor subsystems and geophysical station/array systems. The objectives are to (1) evaluate the overall technical performance of the DWR, measure the distortions introduced by the high resolution digitizers and provide a performance check of the internal calibrator if provided and (2) evaluate the techn… more

Date: July 1, 2007

Creator: Kromer, Richard Paul (R.P. Kromer Consulting, Albuquerque, NM); Hart, Darren M. & Harris, James Mark

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Velocimetry Using Heterodyne Techniques

At LLNL, we have been using heterodyne techniques for the past year and a half to measure velocities up to several kilometers-per-second on different types of experiments. We assembled this diagnostic, which we call the Heterodyne Velocimeter (HetV), using commercially available products developed for the communications industry. We use a 1550 nm fiber laser and single mode fibers to deliver light to and from the target. The return Doppler-shifted light is mixed with the original laser light to… more

Date: August 10, 2004

Creator: Strand, O T; Berzins, L V; Goosman, D R; Kuhlow, W W; Sargis, P D & Whitworth, T L

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

UXO Engineering Design. Technical Specification and ConceptualDesign

The design and fabrication of the UXO detector has numerous challenges and is an important component to the success of this study. This section describes the overall engineering approach, as well as some of the technical details that brought us to the present design. In general, an array of sensor coils is measuring the signal generated by the UXO object in response to a stimulation provided by the driver coil. The information related to the location, shape and properties of the object is deriv… more

Date: April 23, 2005

Creator: Beche, J-F.; Doolittle, L.; Greer, J.; Lafever, R.; Radding, Z.; Ratti, A. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A Novel System for High-Speed Velocimetry Using Heterodyne Techniques

We have built a high-speed velocimeter that has proven to be compact, simple to operate, and fairly inexpensive. We assembled our velocimeter using off-the-shelf components developed for the telecommunications industry. The main components are fiber lasers, high-bandwidth high-sample-rate digitizers, and fiber optic circulators. The laser is a 2-watt CW fiber laser operating at 1550 nm. The digitizers have 8-GHz bandwidth and can digitize four channels simultaneously at 20 GS/s. The maximum vel… more

Date: November 2, 2005

Creator: Strand, O T; Goosman, D R; Martinez, C; Whitworth, T L & Kuhlow, W W

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Procedure to determine the two channel timing measurement accuracy and precision of a digital oscilloscope

The digital oscilloscope allows one to make numerous timing measurements, but just how good are those measurements? This document describes a procedure which can be used to determine the accuracy and precision to which a digital oscilloscope can make various two channel timing measurements.

Date: November 17, 1994

Creator: Johnson, M. & Matulik, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Analysis of NSTX TF Joint Voltage Measurements

This report presents findings of analyses of recorded current and voltage data associated with 72 electrical joints operating at high current and high mechanical stress. The analysis goal was to characterize the mechanical behavior of each joint and thus evaluate its mechanical supports. The joints are part of the toroidal field (TF) magnet system of the National Spherical Torus Experiment (NSTX) pulsed plasma device operating at the Princeton Plasma Physics Laboratory (PPPL). Since there is no… more

Date: October 7, 2005

Creator: Woolley, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Method and Apparatus for Reading Meters From a Video Image

A method and system enable acquisition of data about an environment from one or more meters using video images. One or more meters are imaged by a video camera and the video signal is digitized. Then, each region of the digital image which corresponds to the indicator of the meter is calibrated and the video signal is analyzed to determine the value indicated by each meter indicator. Finally, from the value indicated by each meter indicator in the calibrated region, a meter reading is generated… more

Date: December 31, 1995

Creator: Lewis, Trevor J. & Ferguson, Jeffrey J.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

open access

Using the Heterodyne Method to Measure Velocities on Shock Physics Experiments

We developed a velocimeter system several years ago that uses the heterodyne method [1]. This system is assembled from commercially available components that were developed for the telecommunications industry. There are several advantages of this system over the traditional VISAR method that has made it increasingly popular. This system is compact, portable, and relatively inexpensive. The maximum velocity of this system is determined by the electrical bandwidth of the electronics and the digit… more

Date: August 10, 2007

Creator: Strand, O T & Whitworth, T L

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Neutron generator instrumentation at the Department 2350 Neutron Generator Test Facility

The computer and waveform digitizing capability at the test facility has allowed several changes in the techniques used to test neutron generators. These changes include methods used to calibrate the instrumentation and changes in the operation of the test facility. These changes have increased the efficiency of the test facility as well as increasing both timing and amplitude accuracy of neutron generator waveforms.

Date: June 1, 1979

Creator: Bryant, T.C. & Mowrer, G.R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Color orthophotography: To scan or not

A picture is worth a thousand words, which explains why digital orthophotographs have become such a popular item. Today, most procurement of orthophotographs result in a digital product. However, if one already has hard copy orthophotography, should one scan them, or have them produced as true digital orthophotographs? What are the advantages and disadvantages of each methodology? This paper examines the procedure the Facility for Information Management, Analysis, and Display (FIMAD) at Los Ala… more

Date: November 1, 1994

Creator: Benson, J. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Main Injector Beam Position Monitor Front-End Software

The front-end software developed for the Main Injector (MI) BPM upgrade is described. The software is responsible for controlling a VME crate, equipped with a Motorola PowerPC board running the VxWorks operating system, a custom made timing board and up to 10 commercial digitizer boards. The complete MI BPM system is composed of 7 independent units, each collecting data from 19 to 38 BPM pickups. The MI BPM system uses several components already employed on the successful upgrade of another Fer… more

Date: May 1, 2006

Creator: Piccoli, Luciano; Foulkes, Stephen; Votava, Margaret & Briegel, Charles

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Test report for the infrasound prototype: For a CTBT IMS station

This document describes the results of the Comprehensive Test Ban Treaty (CTBT) Infrasound Prototype Development Test and Evaluation (DT&E). During DT&E the infrasound prototype was evaluated against requirements listed in the System Requirements Document (SRD) based on the Conference on Disarmament/Ad Hoc Committee on a Nuclear Test Ban/Working Papers 224 and 283 and the Preparatory Commission specifications as defined in CTBT/PC/II/1/Add.2, Appendix X, Table 5. The evaluation was conducted du… more

Date: November 1, 1997

Creator: Breding, D.R.; Kromer, R.P.; Whitaker, R.W. & Sandoval, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Oscilloscope trace photograph digitizing system (TRACE). [FAWTEK code]

The digitizing system allows digitization of photographs or sketches of waveforms and then the computer is used to reduce and analyze the data. The software allows for alignment, calibration, removal of baselines, removal of unwanted points and addition of new points which makes for a fairly versatile system as far as data reduction and manipulation are concerned. System considerations are introduced first to orient the potential user to the process of digitizing information. The start up and a… more

Date: October 1, 1977

Creator: Richards, M. & Dabbs, R.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

ADC and TDC implemented using FPGA

Several tests of FPGA devices programmed as analog waveform digitizers are discussed. The ADC uses the ramping-comparing scheme. A multi-channel ADC can be implemented with only a few resistors and capacitors as external components. A periodic logic levels are shaped by passive RC network to generate exponential ramps. The FPGA differential input buffers are used as comparators to compare the ramps with the input signals. The times at which these ramps cross the input signals are digitized by t… more

Date: November 1, 2007

Creator: Wu, Jinyuan; Hansen, Sten & Shi, Zonghan

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Active Filter Hardware Design & Performance for the DIII-D Plasma Control System

OAK-B135 The digital plasma control system (PCS), currently in operation on the DIII-D tokamak, requires inputs from a large number of sensors. Due to the nature of the digitizers and the relative noisy environment from which these signals are derived, each of the 32 signals must be conditioned via an active filter. Two different types of filters, Chebyshev and Bessel with fixed frequencies: 100 Hz Bessel was used for filtering the motional Stark effect diagnostic data. 800 Hz Bessel was design… more

Date: October 1, 2003

Creator: Sellers, D.; Ferron, J. R.; Walker, M. L. & Broesch, J. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department