UNT Libraries Government Documents Department - 3,915 Matching Results

Search Results

prev Results: 97 - 120 next
open access

Amplifier-Discriminator-Multiplexor card

Description: The Amplifier-Discriminator-Multiplexor (ADM) card described was designed for the External Muon Identifier at the 15 ft Bubble Chamber. The general scheme of the data readout of the External Muon Identifier is based on the use of a master clock. The ADM card serves to amplify the signals from the proportional tubes, discriminate them, latch the signals in parallel into a shift register. The data are then shifted out serially to the Time Digitizing System, using the master clock. The shift regis… more
Date: February 1, 1986
Creator: Graupman, D.
Item Type: Refine your search to only Report
open access

Amplitude dependence of the tune shift

Description: Recent studies in the Tevatron have measured the tune shift as a function of the displacement from a closed orbit. The measured values of tune shift were found to be much smaller than one would expect from the measured distribution of the normal octupole moments in the Tevatron. Tracking studies performed to see if, and under what conditions, the observed results could be obtained are reported. The effect of linear coupling is taken into consideration, and is found to significantly reduce the c… more
Date: March 1, 1986
Creator: Gelfand, N.M.
Item Type: Refine your search to only Report
open access

Analog data transmission via fiber optics

Description: In the SLAC Linear Collider Detector (SLD), as in most high-energy particle detectors, the electromagnetic noise environment is the limiting factor in electronic readout performance. Front-end electronics are particulary susceptible to electromagnetic interference (EMI), and great care has been taken to minimize its effects. The transfer of preprocessed analog signals from the detector environs, to the remote digital processing electronics, by conventional means (via metal conductors), may ulti… more
Date: October 1, 1986
Creator: Cisneros, E. L. & Burgueno, G. F.
Item Type: Refine your search to only Article
open access

The analog processing system for the Liquid Argon Calorimeter for SLD at SLAC

Description: The analog processing system for the Liquid Argon Calorimeter for the SLD project at SLAC is described. Amplification, storage of the analog information, and multiplexing is realized on specially developed hybrids, which will be mounted directly on the detector. This leads to a substantial reduction of the cable plant. Test results for the amplifier and for the sampling and multiplexing hybrid (CDU hybrid) are presented. The latter hybird contains a custom monolithic device, the Calorimeter Dat… more
Date: September 1, 1986
Creator: Haller, G. M.; Nelson, D. & Freytag, D. R.
Item Type: Refine your search to only Article
open access

Analyses of operational times and technical aspects of the Salton Sea scientific drilling project: (Final report)

Description: The Deep Salton Sea Scientific Drilling Program (DSSSDP) was conducted in Imperial County of California at the Southeastern edge of the Salton Sea. Emphasis was on the acquisition of scientific data for the evaluation of the geological environment encountered during the drilling of the well. The scientific data acquisition activities consisted of coring, running of numerous downhole logs and tools in support of defining the geologic environment and conducting two full scale flow tests primarily… more
Date: December 1, 1986
Item Type: Refine your search to only Report
open access

Analysis and interpretation of a high density tandem negative ion source

Description: In the last few years the development of tandem-discharge hydrogen-negative-ion-source systems has proceeded along both experimental and theoretical lines. To some extent these developments have proceeded independently, either the available theoretical model was inadequate to account for a specific geometrical configuration, or the experimental data was not sufficient to provide adequate input parameters for calculation. In the tandem system described here the electron temperature, electron den… more
Date: October 22, 1986
Creator: Hiskes, J.R.; Lietzke, A.F. & Hauck, C.
Item Type: Refine your search to only Article
open access

Analysis and testing of the HP-R-214 dome monitor cable from Three Mile Island Unit 2

Description: After the accident at Three Mile Island, Unit 2, two sections of a cable connected to the HP-R-214 dome monitor were removed for testing. One section had been directly exposed to the accident environment: the other had been installed in conduit. In addition, an unused section of cable, which was from the same reel as the dome monitor cable, was available as a control sample. These three sections were subjected to material tests, including density profiling, tensile-strength and elongation tests… more
Date: March 1, 1986
Creator: Richards, E.H. & Dandini, V.J.
Item Type: Refine your search to only Report
open access

An Analysis of Accumulator Ring Pressure Date

Description: This note summarizes and analyzes the Accumulator Ring's pressure data taken during the recent commissioning run (March-October, 1985) and during the three week interval immediately after the end of the commissioning run. Emphasis is placed upon the questions raised in reference [1], viz.: (1) What is the ultimate vacuum attainable? (2) How do we calculate the 'effective-pressure' for beam lifetime estimates from the ion gauge data? (3) What is the required sublimation schedule to maintain adeq… more
Date: January 9, 1986
Creator: Gormley, M.
Item Type: Refine your search to only Report
open access

Analysis of core damage frequency from internal events: Peach Bottom, Unit 2

Description: This document contains the internal event initiated accident sequence analyses for Peach Bottom, Unit 2; one of the reference plants being examined as part of the NUREG-1150 effort by the Nuclear Regulatory Commission. NUREG-1150 will document the risk of a selected group of nuclear power plants. As part of that work, this report contains the overall core damage frequency estimate for Peach Bottom, Unit 2, and the accompanying plant damage state frequencies. Sensitivity and uncertainty analyses… more
Date: October 1, 1986
Creator: Kolaczkowski, A.M.; Lambright, J.A.; Ferrell, W.L.; Cathey, N.G.; Najafi, B. & Harper, F.T.
Item Type: Refine your search to only Report
open access

Analysis of earthquake data recorded by digital field seismic systems, Jackass Flats, Nevada

Description: Analysis of 59 time series from ten small magnitude earthquakes recorded in 1981 by portable digital seismic systems at the southern Nevada Test Site (NTS) yielded several significant results. We find that moment magnitude (M/sub L/) (local magnitude determined from seismic moment) correlates closely with coda duration magnitudes M/sub d/ determined by the Southern Great Basin Seismic Network (SGBSN). Further, local magnitude M/sub W A/ computed from displacement seismograms simulating Wood-And… more
Date: December 31, 1986
Creator: Tarr, A. C. & Rogers, A. M.
Item Type: Refine your search to only Report
open access

Analysis of equivalent capacitances between mutually coupled windings

Description: The interwinding capacitance between mutually coupled windings may play a significant role in the transient analysis of these windings. Neglecting this capacitance or dividing it equally among the interwinding node pairs would then result in considerable inaccuracy in the analysis. A method is proposed to calculate equivalent interwinding capacitances which will reduce this inaccuracy. It is illustrated by simple winding models.
Date: January 1, 1986
Creator: Chowdhuri, P.
Item Type: Refine your search to only Article
open access

Analysis of FEL optical systems with grazing incidence mirrors

Description: The use of grazing incidence optics in resonators alleviates the problem of damage to the optical elements and permits higher powers in cavities of reasonable dimensions for a free electron laser (FEL). The design and manufacture of a grazing incidence beam expander for the Los Alamos FEL mock-up has been completed. In this paper, we describe the analysis of a bare cavity, grazing incidence optical beam expander for an FEL system. Since the existing geometrical and physical optics codes were in… more
Date: January 1, 1986
Creator: Knapp, C. E.; Viswanathan, V. K.; Bender, S. C.; Appert, Q. D.; Lawrence, G. & Barnard, C.
Item Type: Refine your search to only Article
open access

Analysis of fissionable material using delayed gamma rays from photofission

Description: The energetic gamma-ray spectra from the fission products of photofission have been investigated to determine whether photofission can identify heavily shielded fissionable material. Target samples of natural thorium, 93% enriched /sup 235/U, natural uranium, and 93% enriched /sup 239/Pu were irradiated with bremsstrahlung gamma rays produced by 10-MeV electrons from a small linear accelerator. The gamma-ray spectra for each of the four isotopes studied reveals a distinctive intensity distribut… more
Date: September 1, 1986
Creator: Hollas, C. L.; Close, D. A. & Moss, C. E.
Item Type: Refine your search to only Article
open access

Analysis of fuel shares in the industrial sector

Description: These studies describe how fuel shares have changed over time; determine what factors are important in promoting fuel share changes; and project fuel shares to the year 1995 in the industrial sector. A general characterization of changes in fuel shares of four fuel types - coal, natural gas, oil and electricity - for the industrial sector is as follows. Coal as a major fuel source declined rapidly from 1958 to the early 1970s, with oil and natural gas substituting for coal. Coal's share of tota… more
Date: June 1, 1986
Creator: Roop, J.M. & Belzer, D.B.
Item Type: Refine your search to only Report
open access

Analysis of fuel shares in the residential sector: 1960 to 1995

Description: Historical and future energy use by fuel type in the residential sector of the United States are examined. Of interest is the likely relative demand for fuels as they affect national policy issues such as the potential shortfall of electric generating capacity in the mid to late 1990's and the ability of the residential sector to switch rapdily among fuels in response to fuel shortages, price increases and other factors. Factors affecting the share of a fuel used rather than the aggregate level… more
Date: August 1, 1986
Creator: Reilly, J.M.; Shankle, S.A. & Pomykala, J.S.
Item Type: Refine your search to only Report
open access

An analysis of groundwater contamination from the operation of a 6-GeV continuous electron beam accelerator

Description: The potential contamination groundwater in the vicinity of a beam dump associated with a 6-GeV continuous electron beam accelerator has been analyzed considering the site hydrology. The potential contamination arising from photoneutron activation of soil and the subsequent leaching, transport, and decay of tritium are examined. The analysis accounts for dilution from groundwater transport and infiltration of precipitation. The results demonstrate that dilution reduces the concentration of triti… more
Date: January 1, 1986
Creator: Lee, D. W.
Item Type: Refine your search to only Article
open access

Analysis of Heat-Pipe Absorbers in Evacuated-Tube Solar Collectors

Description: Heat transfer in evacuated-tube solar collectors with heat-pipe absorbers is compared with that for similar collectors with flow-through absorbers. In systems that produce hot water or other heated fluids, the heat-pipe absorber suffers a heat transfer penalty compared with the flow-through absorber, but in many cases the penalty can be minimized by proper design at the heat-pipe condenser and system manifold. The heat transfer penalty decreases with decreasing collector heat loss coefficient, … more
Date: February 1986
Creator: Hull, John R.; Schertz, William W. & Allen, John W.
Item Type: Refine your search to only Report
open access

Analysis of high pressure boil-off situation during MSIV closure ATWS in a typical BWR/4

Description: The objective of this paper is to provide a best-estimate analysis of the MSIV Closure ATWS in the Browns Ferry Unit 1 BWR with Mark 1 containment. The calculations have been performed using the RAMONA-3B code which has a three-dimensional neutron kinetics model coupled with one-dimensional (multi-channel core representation), four-equation, nonhomogeneous, nonequilibrium thermal hydraulics. The code also allows for one-dimensional neutronic core representation. The 1-D capability of the code h… more
Date: January 1, 1986
Creator: Neymotin, L. Y.; Slovik, G. C. & Saha, P.
Item Type: Refine your search to only Article
open access

Analysis of hydrogen production during a BWR6 core heatup transient

Description: An extensive study was performed for the prediction of hydrogen production during a BWR6 core heatup transient. Hydrogen production was found to be strongly affected by the transient core heat transfer and vessel hydrodynamics. Various sources important for steam generation and hydrogen production were identified. The results of the study were used by the NRC staff in their evaluation of the adequacy of the H/sub 2/ release histories suggested by the Hydrogen Control Owner's Group (HCOG). The o… more
Date: January 1, 1986
Creator: Yang, J. W. & Pratt, W. T.
Item Type: Refine your search to only Article
open access

Analysis of inelastic neutron scattering spectra from a time-of-flight spectrometer with filter detector

Description: Inelastic neutron scattering spectra obtained from time-of-flight spectrometers with filter detector suffer in energy resolution from a long time-of-flight tail in the filter response function. A mathematical method is described which removes this tail in measured spectra. The energy resolution can thereby be adapted for each part of the spectrum. Applications of the method to data taken at the LANSCE pulsed spallation source are presented.
Date: January 1, 1986
Creator: Vorderwisch, P.; Mezei, F.; Eckert, J. & Goldstone, J.A.
Item Type: Refine your search to only Article
open access

Analysis of Magnetic Refrigerators With External Regeneration

Description: The central idea of the magnetic refrigeration systems analyzed in this paper is that of a MR having a regenerator composed of an integral number of separate stages but having only a single magnetic stage. In principle, each stage is thermally isolated from the others, but the stages are accessed by a manifold and valve system which allows gas to flow between the MM and the individual stages. The concept therefore is distinctly unlike that of the unusual continuous regenerator of gas refrigerat… more
Date: January 1, 1986
Creator: Overton, W. C. Jr. & Barclay, J. A.
Item Type: Refine your search to only Article
open access

Analysis of MSIV-ATWS events with the BNL plant analyzer

Description: There are automatic safety features and operator-initiated emergency procedures which influence the sequence of events until the time when the standby liquid control system (SLCS), or other attempts to get control rods inserted, can effect shutdown of the core. One emergency procedure for a BWR/4 would require the operator to reduce the flow of high pressure coolant injection (HPCI) into the reactor. The core inlet flow rate at this time would be due to natural circulation and the reduced flow … more
Date: June 1, 1986
Creator: Diamond, D. J.
Item Type: Refine your search to only Article
open access

Analysis of nuclear power plant construction costs

Description: The objective of this report is to present the results of a statistical analysis of nuclear power plant construction costs and lead-times (where lead-time is defined as the duration of the construction period), using a sample of units that entered construction during the 1966-1977 period. For more than a decade, analysts have been attempting to understand the reasons for the divergence between predicted and actual construction costs and lead-times. More importantly, it is rapidly being recogniz… more
Date: January 1, 1986
Item Type: Refine your search to only Report
Back to Top of Screen