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ATLAS: A Small, Light Weight, Time-Synchronized Wind-Turbine Data Acquistion System

Description: Wind energy researchers at Sandia National Laboratories have developed a small, lightweight, time- synchronized, robust data acquisition system to acquire long-term time-series data on a wind turbine rotor. A commercial data acquisition module is utilized to acquire data simultaneously from multip!e strain-gauge, analog, and digital channels. Acquisition of rotor data at precisely the same times as acquisition of ground data is ensured by slaving the acquisition clocks on the rotor- based data unit and ground-based units to the Global Positioning Satellite (GPS) system with commercial GPS receiver units and custom-built and programmed programmable logic devices. The acquisition clocks will remain synchronized within two microseconds indefinitely. Field tests have confirmed that synchronization can be maintained at rotation rates in excess of 350 rpm, Commercial spread-spectrum radio modems are used to transfer the rotor data to a ground- based computer concurrently with data acquisition, permitting continuous acquisition of data over a period of several hours, days or even weeks.
Date: November 9, 1998
Creator: Berg, D.E.; Robertson, P. & Zayas, J.
Partner: UNT Libraries Government Documents Department

Kerman Photovoltaic Power Plant R&D data collection computer system operations and maintenance

Description: The Supervisory Control and Data Acquisition (SCADA) system at the Kerman PV Plant monitors 52 analog, 44 status, 13 control, and 4 accumulator data points in real-time. A Remote Terminal Unit (RTU) polls 7 peripheral data acquisition units that are distributed throughout the plant once every second, and stores all analog, status, and accumulator points that have changed since the last scan. The R&D Computer, which is connected to the SCADA RTU via a RS-232 serial link, polls the RTU once every 5-7 seconds and records any values that have changed since the last scan. A SCADA software package called RealFlex runs on the R&D computer and stores all updated data values taken from the RTU, along with a time-stamp for each, in a historical real-time database. From this database, averages of all analog data points and snapshots of all status points are generated every 10 minutes and appended to a daily file. These files are downloaded via modem by PVUSA/Davis staff every day, and the data is placed into the PVUSA database.
Date: June 1, 1994
Creator: Rosen, P.B.
Partner: UNT Libraries Government Documents Department

The Sloan Digital Sky Survey data acquisition system, and early results

Description: The Sloan Digital Sky Survey will systematically map one- quarter of the sky, producing detailed images in five color bands and determining the positions and absolute bright- nesses of more than 100 million celestial objects. It will also measure the redshifts of a million selected galaxies and of 100,000 quasars, yielding a three-dimensional map of the universe through a volume one hundred times larger than that explored to date. The SDSS collaboration is currently in the process of commissioning the 2.5-meter survey tele- scope. We describe the data acquisition system used to record the survey data. This system consists of twelve sin- gle board computers and their associated interfaces to the camera and spectrograph CCD electronics, to tape drives, and to online video displays, distributed among several VME crates. A central UNIX computer connected to the VME crates via a vertical bus adapter coordinates the sys- tem and provides the interface to telescope operations. We briefly discuss results from the observing runs to date and plans for the archiving and distribution of data.
Date: June 29, 1999
Creator: J. Annis, J. Bakken, D. Holmgren, D. Petravick, R. Rechenmacher
Partner: UNT Libraries Government Documents Department


Description: A web-based system for electronic logbooks, ''elog'', developed at Fermilab (FNAL), has been adopted for use by AGS and RHIC operations and physicists at BNL for the 2001-2 fixed target and collider runs. This paper describes the main functional and technical issues encountered in the first year of electronic logbook use, including security, search and indexing, sequencer integration, archival, and graphics management. We also comment on organizational experience and planned changes for the next facility run starting in September 2002.
Date: June 2, 2002
Partner: UNT Libraries Government Documents Department

Channel control ASIC for the CMS hadron calorimeter front end readout module

Description: The Channel Control ASIC (CCA) is used along with a custom Charge Integrator and Encoder (QIE) ASIC to digitize signals from the hybrid photo diodes (HPDs) and photomultiplier tubes (PMTs) in the CMS hadron calorimeter. The CCA sits between the QIE and the data acquisition system. All digital signals to and from the QIE pass through the CCA chip. One CCA chip interfaces with two QIE channels. The CCA provides individually delayed clocks to each of the QIE chips in addition to various control signals. The QIE sends digitized PMT or HPD signals and time slice information to the CCA, which sends the data to the data acquisition system through an optical link.
Date: September 26, 2002
Creator: al., Ray Yarema et
Partner: UNT Libraries Government Documents Department

RHIC Beam Synchronous Trigger Module.

Description: The RHIC Beam Synchronous Event System consists of centralized event encoders (one for each collider ring), which operate from the RF clock and the revolution clock provided by the RHIC RF system, and distributed embedded decoders. The Beam Synchronous Trigger Module (V124) is a general purpose 6U x 4HP, VMEbus controlled module that is compatible with the RHIC Beam Synchronous Event System and is designed to provide clocks and triggers for collider data acquisition systems and experiments. The V124 Module contains a separate memory (Bunch Fill Mask RAM) for each channel that is software configurable with the pattern of filled buckets (Bunch Fill Pattern) to permit bunch synchronous triggering/clocking. This module provides eight identical channels that can be configured independently or in pairs, and a buffered RF Clock output.
Date: March 29, 1999
Creator: Hartmann, H. & Kerner, T.
Partner: UNT Libraries Government Documents Department

High Energy Neutrinos from the Cold: Status and Prospects of the IceCube Experiment

Description: The primary motivation for building neutrino telescopes is to open the road for neutrino astronomy, and to offer another observational window for the study of cosmic ray origins. Other physics topics, such as the search for WIMPs, can also be developed with neutrino telescope. As of March 2008, the IceCube detector, with half of its strings deployed, is the world largest neutrino telescope taking data to date and it will reach its completion in 2011. Data taken with the growing detector are being analyzed. The results of some of these works are summarized here. AMANDA has been successfully integrated into IceCube data acquisition system and continues to accumulate data. Results obtained using only AMANDA data taken between the years 2000 and 2006 are also presented. The future of IceCube and the extensions in both low and high energy regions will finally be discussed in the last section.
Date: February 29, 2008
Creator: Collaboration, IceCube; Portello-Roucelle, Cecile & Collaboration, IceCube
Partner: UNT Libraries Government Documents Department


Description: The conformable array data acquisition system consists of the array, the data acquisition and analysis hardware, and the data acquisition and analysis software. The following decisions were made in the development of the system. Array design decisions include the following: (a) The flexible array board will be approximately 8 by 12 inches square with the active coil section confined to a smaller 6-inch-square section at the center of the board. The outer edges of the board will be used for switching and other circuitry. (b) The diameter of the array coils will be approximately 0.375 inch (9.5 mm). Data acquisition strategy includes: (a) The corrosion spots will be mapped by successive interrogations of the active section of the array board. Approximately 10,000 samples will be acquired for each coil. The 10,000 readings will be averaged to produce one lower-noise value for each coil. This will be repeated for each coil in the array in a sequential manner. The total corrosion image for the sector will be built from the individual coil data. (b) Corrosion larger than the operational portion of the array board will be measured using a grid technique. Uniquely identified areas in the grid will overlay a corroded area, and data collected for each area will be connected by the display and assessment software to form a composite image for the corroded area. (c) Defect assessment will be invoked on the corrosion image by ''boxing'' selected areas on the color contour map. Software decisions consisted of selecting the appropriate LABVIEW modules running in a Windows XP operating system to obtain the required functionality. This third quarterly report of the project presents the activity and conclusions reached to date. Specifically, the design of the conformable array was completed and work was started on obtaining the data acquisition hardware. Southwest ...
Date: July 1, 2003
Creator: Crouch, Alfred E.
Partner: UNT Libraries Government Documents Department

Refinement, testing, and application of an Integrated Data Assimilation/Sounding System (IDASS) for the DOE/ARM Experimental Program. Final report for period September 20, 1990 - May 8, 1997

Description: This report describes work done by NCAR under the ''Refinement, Testing, and Application of an Integrated Data Assimilation/Sounding System (IDASS) for the DOE/ARM Experimental Program''. It includes a discussion of the goals, findings and a list of 27 journal articles, 92 non-refereed papers and 30 other presentations not associated with a formal publication.
Date: April 9, 2002
Creator: Parsons, David B.
Partner: UNT Libraries Government Documents Department

On-line computer facility and operating system COSACS at the ANL fast neutron generator

Description: An on-line/off-line computer system has been dnstalled at the ANL fast neutron generator (FNG) for on-line data acquisition and storage, and for off- line data reduction and evaluation. An operating system called COSACS has been written specifically for the installation. The present report describes all available hardware and software, but emphasizes those aspects of both that were tailored for this application. The various physicaldata channels, both input and output, are discussed with regard to transfer rates, bit formats, and interrupt control. The general relationship and areas of compatibility of COSACS with standard compilers and assemblers are discussed. A complete tabulation is given of operations available under COSACS, together with their input/output formats. (auth)
Date: August 1, 1973
Creator: Poenitz, W.P. & Whalen, J.F.
Partner: UNT Libraries Government Documents Department

Software implementation of a high speed interface between a PDP-10 and several PDP-11s

Description: The DMA10 is a high speed link between a PDP-10 and up to eight PDP-11s; specifically, the PDP-10 shares sections of its memory with the PDP-11s. The two segment concept on the PDP-10 of shared/reentrant code and non-shared code is implemented. The inclusion of read only memory on the PDP-11s allows for the development of ''PROM'' software which all the PDP-11s may share. The principal difference between the DMA10 and other communications interfaces is that it is not a block transfer device. Because of the shared memory concept the features of the DMA10 are high data bandwidth and minimal processor intervention between data transfers. Communication programs between the PDP-10 and the PDP-11 may be tested wholly in either processor, independent of the DMA10 interface. In the current mode of operation the PDP-11's simply act as device controllers. Future plans include separate operating systems in various PDP-11s. (auth)
Date: January 1, 1975
Creator: De Mesa, N.P. III
Partner: UNT Libraries Government Documents Department

2XIIB computer data acquisition system

Description: All major plasma diagnostic measurements from the 2XIIB experiment are recorded, digitized, and stored by the computer data acquisition system. The raw data is then examined, correlated, reduced, and useful portions are quickly retrieved which direct the future conduct of the plasma experiment. This is done in real time and on line while the data is current. The immediate availability of this pertinent data has accelerated the rate at which the 2XII personnel have been able to gain knowledge in the study of plasma containment and fusion interaction. The up time of the experiment is being used much more effectively than ever before. This paper describes the hardware configuration of our data system in relation to various plasma parameters measured, the advantages of powerful software routines to reduce and correlate the data, the present plans for expansion of the system, and the problems we have had to overcome in certain areas to meet our original goals. (auth)
Date: November 18, 1975
Creator: Tyler, G.C.
Partner: UNT Libraries Government Documents Department