1,042 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Science and Technology"  
Results: 1 - 24 next
open access

Tracking with wire chambers at high luminosities

Description: Radiation damage and rate limitations impose severe constraints on wire chambers at the SSC. Possible conceptual designs for wire chamber tracking systems that satisfy these constraints are discussed. Computer simulation studies of tracking in such systems are presented. Simulations of events from interesting physics at the SSC, including hits from minimum bias background events, are examined. Results of some preliminary pattern recognition studies are given. 11 refs., 10 figs.
Date: December 1, 1989
Creator: Hanson, G. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Instrument for observing transient cosmic gamma-ray sources for the ISEE-C Heliocentric spacecraft

Description: Satellite instrumentation that would serve as one element of a three-satellite network to provide precise directional information for the recently discovered cosmic gamma-ray bursts is described. The proposed network would be capable of determining source locations with uncertainties of less than one arc minute, sufficient for a meaningful optical and radio search. The association of the gamma bursts with a known type of astrophysical object provides the most direct method for establishing sour… more
Date: December 1, 1977
Creator: Evans, W.D.; Aiello, W.P. & Klebesadel, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Mark II Silicon Strip Vertex Detector and performance of a silicon detector telescope in the Mark II detector at the SLC

Description: A Silicon Strip Vertex Detector (SSVD) consisting of 36 independent silicon detector modules has been built for use in the Mark II detector at the SLAC Linear Collider (SLC). We discuss the performance of the individual modules and the stability and accuracy of their placement in the mechanical support. To gain operational experience at the SLC, we have assembled and placed inside the Mark II a telescope made of three Silicon Detector Modules. We present results from the first data run of the S… more
Date: December 1, 1989
Creator: Labarga, L.; Adolphsen, C.; Gratta, G.; Litke, A.; Turala, M.; Zaccardelli, C. (California Univ., Santa Cruz, CA (USA). Inst. for Particle Physics) et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Small Angle Physics at CDF: A Progress Report

Description: In 1989 CDF collected data in special high beta runs with a trigger selecting elastic and inelastic events in order to measure the total cross section ({sigma}{sub tot}) and the differential elastic cross section (d{sigma}{sub el}/dt). Data were taken at cms energies of 300, 540, 1000 and 1800 GeV. A double arm magnetic spectrometer located along the beam pipe tags the particles scattered at very small angles and tracking detectors surrounding the interaction point reveal particles produced at … more
Date: December 16, 1989
Creator: Paoletti, Riccardo
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Front-end electronics development for the SSC

Description: This is a status report on electronics development undertaken by the Front-End Electronics Collaboration. The overall goal of the collaboration remains the development by 1992 of complete, architecturally compatible, front end electronic systems for calorimeter, wire drift chamber, and silicon strip readout. We report here a few highlights to give a brief overview of the work underway. Performance requirements and capabilities, selected architectures, circuit designs and test results are presen… more
Date: December 1, 1990
Creator: Levi, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CDF (Collider Detector at Fermilab) detector simulation

Description: The Collider Detector at Fermilab (CDF) uses several different simulation programs, each tuned for specific applications. The programs rely heavily on the extensive test beam data that CDF has accumulated. Sophisticated shower parameterizations are used, yielding enormous gains in speed over full cascade programs. 3 refs., 5 figs.
Date: December 1, 1987
Creator: Freeman, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

As-built description of the EBR-II, Run 97 dosimetry experiment

Description: A dosimetry experiment has been designed and fabricated for inclusion in the Experimental Breeder Reactor-II (EBR-II) during Run 97 in a Row 2 position. Various types of dosimeter material have been included in the single B-7c pin from 60 cm below midplane to 60 cm above. This report contains the as-built description of irradiation hardware and a detailed description of the dosimetry.
Date: December 1, 1978
Creator: Long, C.L.; Ulseth, J.A. & Lippincott, E.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Monopole search using an accelerator detector

Description: A neutrino detector at the Brookhaven AGS has been used to investigate the feasibility of using an already constructed apparatus for GUT monopole searches. A flux limit (90%CL) of 5.2 x 10/sup -12/ cm/sup -2/ sec/sup -1/ str/sup -1/ was found. The limitations of such an approach are discussed.
Date: December 20, 1983
Creator: Ahrenes, L.A.; Aronson, S.H.; Connolly, P.L.; Erickson, T.E.; Gibbard, B.G.; Montag, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A fast calorimeter simulation for SSC (Superconducting Super Collider) detector design

Description: We have developed a fast and easily varied simulation of a ''generic'' 4..pi.. calorimeter. The program enables one to study the gross features of detector response for various physics processes. The simulation program is described and some examples of its use are presented. 3 refs., 6 figs.
Date: December 1, 1987
Creator: Newman-Holmes, C. & Freeman, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Gamma-Ray Measurements With the Segmented Gamma Scan. [Maintenance Manual]

Description: A revised and updated operation and maintenance manual for the segmented gamma-scan instrument is presented, which describes routine assay techniques as well as the theory of operation in sufficient depth that an experienced assayist can make nonroutine assays on a wide variety of materials and samples. In addition, complete electronic and electrical schematics of the Los Alamos Scientific Laboratory (LASL)-designed portions of the system are presented, along with sufficient system and circuit … more
Date: December 1, 1977
Creator: Martin, E. R.; Jones, D. F. & Parker, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Retrieval of the energy spectrum in neutron TOF measurements

Description: The problem of retrieving the time dependence of the neutron energy spectrum from the detector current data in Faraday-cup experiments is studied. The time-dependent energy spectrum can be retrieved only when the neutron source in question meets a certain criterion. A detailed analytic formulation for the folding process is presented. The method that can be used to unfold the data in the retrievable case is explained in detail. 2 figures.
Date: December 1, 1977
Creator: Lee, H. & Walker, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Small Business Innovation Research: DOD's Program Supports Weapon Systems, but Lacks Comprehensive Data on Technology Transition Outcomes

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Small Business Innovation Research (SBIR) programs within the military departments use a variety of practices and tools to facilitate technology transition--the act of passing technologies developed in the science and technology environment on to users such as weapon system acquisition programs or warfighters in the field. GAO identified some common transition practices and tools across SBIR program… more
Date: December 20, 2013
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Research and Development: DOE Could Enhance the Project Selection Process for Government Oil and Natural Gas Research

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Although competitive oil and natural gas markets generally provide incentives for companies to invest in research and development (R&D), some industry experts believe these companies may underinvest in certain areas. A recent GAO report noted important criteria for the Department of Energy (DOE) to consider in evaluating its oil and natural gas R&D efforts--including the likelihood that industry would p… more
Date: December 29, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federal Research: NASA Should Better Inform Researchers about How to Appeal Dissemination Decisions

Description: A letter report issued by the Government Accountability Office with an abstract that begins "National Aeronautics and Space Administration (NASA) researchers generally disseminate their agency-funded research results through publications, presentations, agency releases, and media interviews. In 2007, GAO reviewed dissemination policies at NASA and two other agencies and found that NASA's policies were generally clear, but GAO's survey of NASA researchers raised concerns that many of them did no… more
Date: December 3, 2009
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Time projection spectrometer

Description: The time projection chamber (TPC) is discussed. Its advantage is its ability to collect a great deal of information on multiparticle reactions from high-energy colliding beam experiments. The TPC makes it possible to reconstruct all the charged particles in the reaction, and it can be used for mass identification. (FS)
Date: December 1, 1979
Creator: Anderson, H.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Computer control for a cladding thickness tester

Description: A cladding thickness tester for extruded reactor fuel tubes has been automated to provide reduced operator interaction. The cladding thickness tester, which uses an x-ray fluorescence analyzer, has been interfaced with an SRL/6800 microcomputer to control fuel tube orientation, operate the analyzer, calculate cladding thickness, and give pertinent data in hardcopy tabular form.
Date: December 1, 1979
Creator: Sand, R.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Real-time computer analysis for nuclear material detection. Part 3. Nuclear instrumentation interface

Description: An electronic interface between a Digital Equipment Corporation (DEC) LSI-11 microcomputer and a LeCroy Research Systems model 3001 qVt multichannel analyzer is described in detail. This interface provides for 16-bit parallel data transfer from the memory of the analyzer to the memory of the computer. An unusual feature of the interface is a provision that allows storage of counts of logic pulses (e.g., from radiation detector discriminators) in the first 16 channels of the analyzer's memory. A… more
Date: December 1, 1981
Creator: Gosnell, T. B.; Wood, R. E. & Anzelon, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Collider detector beam line test table: a structural analysis

Description: The apparatus which sweeps calorimeter and endwall modules through the beam during testing is called a beam line test table. Because of rather stringent requirements for the physical positioning of the modules an analysis is done here to determine the modifications to the current test table design which will minimize deflections of the table under load.
Date: December 23, 1983
Creator: Leininger, M.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal-hydraulic analysis of the dual-function gamma thermometer

Description: A computational study was performed to investigate the potential of a modified gamma thermometer (GT) as a monitor of both the localized power level and the core cooling in a PWR. The volumetric heat source within the thermometer was updated to include heat deposited by neutrons as well as heat deposited by decay gammas and neutron-induced gammas. Utilizing this source, along with a more detailed thermal-hydraulics model, a series of thermal-hydraulic calculations were performed to simulate cer… more
Date: December 1, 1981
Creator: Johnson, J.O. & Burns, T.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the Beijing Instrument Factory GDB-44F photomultipler

Description: Characteristics have been measured for the GDB-44F 2''-diameter photomultiplier. Some typical photomultiplier characteristics - such as gain, dark current, anode output current, transit and rise times as a function of voltage between anode and cathode, and photoelectron pulse-height spectrum, the quantum-efficiency and the single-electron transit time spread were measured. Descriptions of the measuring systems were also given.
Date: December 15, 1982
Creator: Young, E. & Lo, C.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental study of fission counter design optimization with a simplified analytical model of performance

Description: Trends inferred from this study of fission counter design confirm previously known relationships between design variables and counter performance. Most important is the proved existence of an optimum electrode spacing for a specific design that increases with electrode area and decreases with gamma dose rate. The PD product also has an optimum value, with low values being limited by the presence of electronic noise and high values by enhanced gamma pileup. Conventional 50-..cap omega.. signal c… more
Date: December 1, 1979
Creator: Valentine, K. H.; De Lorenzo, J. T.; Clay, W. T.; Pare, V. K.; Guerrant, G. C. & Burns, R. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

B Counting at BaBar

Description: In this thesis we examine the method of counting B{bar B} events produced in the BABAR experiment. The original method was proposed in 2000, but improvements to track reconstruction and our understanding of the detector since that date make it appropriate to revisit the B Counting method. We propose a new set of cuts designed to minimize the sensitivity to time-varying backgrounds. We find the new method counts B{bar B} events with an associated systematic uncertainty of {+-} 0.6%.
Date: December 16, 2008
Creator: McGregor, Grant Duncan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen