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12,020 Matching Results
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Weeks Island S sand reservoir B gravity stable miscible CO/sub 2/ displacement, Iberia Parish, Louisiana. Fourth annual report, June 1980-June 1981
Shell, in conjunction with the United States of America Department of Energy, is conducting a gravity stable displacement field test of the miscible CO/sub 2/ process. The test is being conducted in the portion of a fault sealed reservoir lying below a subsea depth of -12,750 feet. Injection of the CO/sub 2/ slug at the producing gas-oil contact commenced in October 1978. Injection of the 860 MM cubic foot slug was completed in February of 1980. The slug of CO/sub 2/ was moved downward through the watered out sand by production of downdip water. The leading edge of the displacement has reached the producing perforations and production of the oil column commenced on January 26, 1981. Conventional cores and the log-inject-log technique were used to determine residual oil saturation in a well drilled as the pilot producer. Pulsed neutron logging devices have been used to detect the CO/sub 2/ slug and monitor its subsequent movements in the vicinity of the production well. The monitor logs indicate the thickness of the oil column had increased during the displacement to the production perforations located 130 feet below the level of CO/sub 2/ injection. The 23 foot oil column remaining at initiation of …
Date:
April 1, 1982
Creator:
Perry, G.E.
Object Type:
Report
System:
The UNT Digital Library
Application of ultrasonic waves to assess grain structure in cast stainless steel
Although the ASME code requires the inspection of cast stainless steel (CSS) piping in nuclear reactors, it has not been possible to demonstrate unambiguously that current inspection techniques are adequate. Ultrasonic inspection is difficult because the microstructure of CSS can vary considerably, from elastically isotropic with equiaxed, relatively small grains to elastically anisotropic with a columnar grain structure to a combination of the two. For the near term, improvements that may increase the reliability of ultrasonic inspection include (a) the development of methods to establish the microstructure of the material (to help optimize the inspection technique), (b) the identification of calibration standards that are more representative of the material to be inspected and (c) the use of cracked CSS samples for training purposes. In this paper, the results of experiments to characterize the microstructure of CSS by use of ultrasonic waves will be discussed. Shear waves may be more effective for isotropic material, whereas longitudinal waves may be better for the anisotropic case because of beam-focusing effects. Sound velocity and beam skewing can be measured accurately enough to characterize CSS even in thick-walled reactor components. 5 refs., 6 figs., 2 tabs.
Date:
April 1, 1985
Creator:
Kupperman, D.S.; Reimann, K.J. & Abrego-Lopez, J.
Object Type:
Article
System:
The UNT Digital Library
Management of government personal property in the hands of contractors. Handbook for contracting officers and staff
This manual is divided into three parts. Part One applies to the management of Government personal property within the Department of Energy in general terms. Part Two describes the specifics of the application of personal property management techniques to On-Site Contractors. Part three applies to Off-Site Contractors. Part One introduces the field of property management. It discusses: the legal basis and requirements established by Federal Statutes and the parallel authorities and responsibilities; the related evolution of the Department of Energy; the regulation system within the Federal Government and its implementation by the Department for personal property management. The life cycle of equipment is presented and how control over personal property is maintained through an accountability system. Classifications of property and contract clauses are discussed. The relationships of contracting officers and property administrators with contractors are presented in each of the discussions as appropriate. Part One consists of only one chapter and is applicable to the management of property utilized by all types of contractors. It provides the foundation to explore in some detail the actions and interactions that occur between the Department's procurement and property personnel and those of the contractor. This exploration in depth is made in Parts Two …
Date:
April 1, 1982
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Measurement of the central ion and electron temperature of tokamak plasmas from the x-ray line radiation of high-Z impurity ions
This paper describes measurements of the central ion and electron temperature of tokamak plasmas from the observation of the 1s - 2p resonance lines, and the associated dielectronic (1s/sup 2/nl - 1s2pnl, with n greater than or equal to 2) satellites, of helium-like iron (Fe XXV) and titanium (Ti XXI). The satellite to resonance line ratios are very sensitive to the electron temperature and are used as an electron temperature diagnostic. The ion temperature is deduced from the Doppler width of the 1s - 2p resonance lines. The measurements have been performed with high resolution Bragg crystal spectrometers on the PLT (Princeton Large Torus) and PDX (Poloidal Divertor Experiment) tokamaks. The details of the experimental arrangement and line evaluation are described, and the ion and electron temperature results are compared with those obtained from independent diagnostic techniques, such as the analysis of charge-exchange neutrals and measurements of the electron cyclotron radiation. The obtained experimental results permit a detailed comparison with theoretical predictions.
Date:
April 1, 1982
Creator:
Bitter, M.; Von Goeler, S.; Goldman, M.; Hill, K.W.; Horton, R.; Roney, W. et al.
Object Type:
Report
System:
The UNT Digital Library
Construction of the CDF silicon vertex detector
Technical details and methods used in constructing the CDF silicon vertex detector are presented. This description includes a discussion of the foam-carbon fiber composite structure used to silicon microstrip detectors and the procedure for achievement of 5 {mu}m detector alignment. The construction of the beryllium barrel structure, which houses the detector assemblies, is also described. In addition, the 10 {mu}m placement accuracy of the detectors in the barrel structure is discussed and the detector cooling and mounting systems are described. 12 refs.
Date:
April 1, 1992
Creator:
Skarha, J.; Barnett, B.; Boswell, C.; Snider, F.; Spies, A.; Tseng, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Low-energy x-ray emission from magnetic-fusion plasmas
Complex, transient, spatially inhomogeneous tokamak plasmas require careful diagnosis. As the reactor regime is approached, soft x rays become more important as a versatile diagnostic tool and an energy-loss mechanism. Continuum emission provides a measure of electron temperature and light impurity content. Impurity lines serve as a probe for ion and electron temperature, impurity behavior, and radiative cooling. The entire spectrum yields vital information on instabilities and disruptions. The importance of impurities is illustrated by the extensive efforts toward understanding impurity production, effects, and control. Minute heavy impurity concentrations can prevent reactor ignition. Si(Li) - detector arrays give a broad overview of continuum and line x-ray emission (.3 to 50 keV) with moderate energy (200 eV) and time (50 ms) resolution. Bragg crystal and grating spectrometers provide detailed information on impurity lines with moderate to excellent (E/..delta..E = 100 to 23,000) resolving power and 1 to 50 ms time resolution. Imaging detector arrays measure rapid (approx. 10 ..mu..s) fluctuations due to MHD instabilities and probe impurity behavior and radiative cooling. Future tokamaks require more diagnostic channels to avoid spatial scanning, higher throughput for fast, single-shot diagnosis, increased spectral information per sample period via fast scanning or use of multi-element detectors …
Date:
April 1, 1982
Creator:
Hill, K.W.; Bitter, M.; Eames, D.; Von Goeler, S.; Goldman, M.; Sauthoff, N.R. et al.
Object Type:
Report
System:
The UNT Digital Library
Compton harmonic resonances, stochastic instabilities, quasilinear diffusion, and collisionless damping with ultra-high intensity laser waves
The dynamics of electrons in two-dimensional, linearly or circularly polarized, ultra-high intensity (above 10{sup 18}W/cm{sup 2}) laser waves, is investigated. The Compton harmonic resonances are identified as the source of various stochastic instabilities. Both Arnold diffusion and resonance overlap are considered. The quasilinear kinetic equation, describing the evolution of the electron distribution function, is derived, and the associated collisionless damping coefficient is calculated. The implications of these new processes are considered and discussed.
Date:
April 1, 1992
Creator:
Rax, J.M.
Object Type:
Report
System:
The UNT Digital Library
Effect of exposing two commercial manufacturers' second surface silver/glass mirrors to elevated temperature, mechanical loading, and high-humidity environments
A preliminary examination of the effect of three accelerated exposure parameters on second surface silver/glass mirrors was performed. The variables studied were temperature (elevated and sub-zero), humidity and mechanical loading. One test consisted of exposing mirror coupons to dry heat (80/sup 0/C) and heat plus water vapor (80/sup 0/C, approx. 100% RH) environments. Another test consisted of subjecting mechanically loaded mirror strips to sub-zero temperature (-20/sup 0/C), dry heat (80/sup 0/C), and heat plus water vapor. Samples were evaluated qualitatively using dark field microscopy (1X and 100X). Quantitative determination of the effects of exposure testing on the mirrors was done with spectrophotometer spectral hemispherical and diffuse reflectance measurements. Degradation that was progressive with time was observed for mirrors exposed to dry heat and heat plus water vapor. The degradation did not have the same visual appearance for the two environments. Mechanical loading at -20/sup 0/C produced no degradation after three months' exposure time. Mechanical loading in dry heat and heat plus water vapor environments resulted in mirror degradation that was the same as that found in unloaded mirrors exposed to the same temperature and humidity. These preliminary tests indicate that the dry heat and heat plus water vapor accelerated tests …
Date:
April 1, 1982
Creator:
Dake, L. S. & Lind, M. A.
Object Type:
Report
System:
The UNT Digital Library
Measurement of the K{sup 0}{sub S} - K{sup 0}{sub L} mass difference by the time dependence of strangeness
The magnitude of the K{sup 0}{sub S} - K{sup 0}{sub L} mass difference has been measured by monitoring the time dependence of the strangeness of neutral K's produced in hydrogen and deuterium in the LRL 25 '' hydrogen bubble chamber. The particles originate as K-bar{sup 0} in K{sup -} change-exchange scatters at .85 to 1.15 Bev/c; the signature for an S = -1 reaction is the production of a hyperon. Seventy- seven events were found, obtaining {Delta}{omega} = 0.50 =- 0.15, measured in units of inverse K{sup 0}{sub S} lifetime. This and two other recent measurements using the same method are consistent with one another and with measurements of {Delta}{omega} by other means. A combined ''world average'' of nine reasonably consistent measurements gives {Delta}{omega} = 0.60 +- 0.06.
Date:
April 1, 1966
Creator:
Camerini, U.; Cline, D.; English, J. B.; Fischbein, W.; Fry, W. F.; Gaidos, J. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Semiconductor die attachment. Final report
A technique was established for attaching non-beam lead semiconductor devices to metallized ceramic substrates for hybrid microcircuits (HMCs). Conductive and non-conductive epoxies were shown to be capable of high shear strengths after exposure to high temperatures (125 to 200/sup 0/C) for significant periods of time (48 to 168 h). Chip-on-tab devices attached to the substrate with Ablefilm 517 non-conductive epoxy was the technology chosen.
Date:
April 1, 1978
Creator:
Zawicki, L.R.
Object Type:
Report
System:
The UNT Digital Library
Determination of phase boundaries and diffusion parameters in tantalum hydrides in pulsed NMR
Proton spin-lattice relaxation times T/sub 1/ were measured over a wide range of temperature (77 K to 470 K) and compositions (H/Ta = 0.155 to 0.677) in the tantalum-hydrogen system at a frequency of 40,000 MHz. In the high temperature solid solution ..cap alpha.. phase, the activation energy for hydrogen diffusion was found to be 0.140 +- 0.002 eV/atom, and the value of the jump rate (or its corresponding correlation time) was found to be essentially constant throughout the range of compositions studied. The conduction electron contribution to T/sub 1/ measured in the ..cap alpha.. phase agreed qualitatively with the trend shown by previously published susceptibility data. The single phase epsilon region and the ..cap alpha.. + epsilon two-phase region were particularly noted. It could also be concluded from the measurements that the hydrogen jump rate decreased by a factor of approximately 7.2 from the ..cap alpha.. phase to the ordered phases at low temperatures and slightly decreased further in the epsilon phase. Anomalous relaxation times were found in the low temperature range (77 K less than or equal to T less than or equal to K). In this region, T/sub 1/ remains essentially constant, and does not follow the …
Date:
April 1, 1978
Creator:
Hornung, P. A.
Object Type:
Report
System:
The UNT Digital Library
Photon-Photon Physics with the Mark II at PEP
Photon-photon interactions are studied with the Mark II detector at PEP. The inclusive production of charged hadrons at large transverse momenta and the exclusive production of meson pairs at large invarient mass are compared with recent hard scattering calculations. Copious inclusive production of K/sup 0/'s at large transverse momenta provides evidence for charm production. The radiative width of the f'(1520) is measured via its K/sub s//sup 0/ anti K/sub s//sup 0/ decay mode.
Date:
April 1, 1986
Creator:
Gidal, G.
Object Type:
Article
System:
The UNT Digital Library
Fluorine magnetic resonance determination of water, alcohols, and amines
None
Date:
April 1, 1975
Creator:
Dorsey, J. G.; Eager, M. H.; Rutenberg, A. C. & Green, L. A.
Object Type:
Report
System:
The UNT Digital Library
Search for the. Lambda. sub b baryon at CDF
The {Lambda}{sub b} baryon has been observed recently by UA1 through its decay {Lambda}{sub b} {yields} J/{psi}{Lambda}{degrees}. Although CDF finds twice as many J/{psi} and observes {Lambda}{degrees} decays, no evidence for an {Lambda}{sub b} signal is seen. The UA1 data supports a lower than expected production P{sub T} for the {Lambda}{sub b}, and therefore, a lower pion P{sub T}, below the observation threshold of CDF. This result suggests that UA1 and CDF are probably not inconsistent, but also that the production models are not quite right.
Date:
April 1, 1992
Creator:
Gauthier, A. (Illinois Univ., Urbana, IL (United States))
Object Type:
Article
System:
The UNT Digital Library
Irreversibility behavior in Ag-sheathed Bi-based superconducting wires
Irreversibility lines for Ag/(Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y}(2223) wires prepared through a phase formation- decomposition-recovery (PFDR) process and normal annealing process were determined using both AC susceptibility measurements under DC fields and magnetisation measurements. It was found that flux pinning was enhanced in the PFDR processed samples over the normal processed samples, in particular at temperature above 77 K. The PFDR process results in high mass density, grain alignment, uniform distribution of impurity precipitates and high density of defects. The irreversibility temperatures scaled with the applied field according to H{sup 1/3}, which is in contrast to H{sup 2/3} law for YBa{sub 2}Cu{sub 3}O{sub 7-x} and conventional superconductors. The irreversibility lines for PFDR processed tapes showed a crossover with those for normal processed tapes at temperature below {Tc} of the (Bi,Pb){sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} (2212), suggesting that at temperature above {Tc} of the 2212 phase, the 2212 as nonsuperconducting region, may serve as effective pinning sites for fluxoids.
Date:
April 1, 1992
Creator:
Dou, S.X.; Liu, H.K.; Guo, Y.C.; Wang, J.; Jin, X.J.; Hu, Q.Y. (New South Wales Univ., Kensington (Australia)) et al.
Object Type:
Article
System:
The UNT Digital Library
An examination of wake effects and power production for a group of large wind turbines
Data from a group of three MOD-2 wind turbines and two meteorological towers at Goodnoe Hills were analyzed to evaluate turbine power output and wake effects (losses in power production due to operation of upwind turbines), and atmospheric factors influencing them. The influences of variations in the ambient wind speed, wind direction, and turbulence intensity were the primary factors evaluated. Meteorological and turbine data collected at the Goodnoe Hills site from April 1 to October 17, 1985, were examined to select the data sets for these analyses. Wind data from the two meteorological towers were evaluated to estimate the effect of a wake from an upwind turbine on the wind flow measured at the downwind tower. Maximum velocity deficits were about 25% and 12% at downwind distances of 5.8 and 8.3 rotor diameters (D), respectively. However, the maximum deficits at 5.8 D were about 14/degree/ off the centerline orientation between the turbine and the tower, indicating significant wake curvature. Velocity deficits were found to depend on the ambient wind speed, ranging from 27% at lower speeds (15 to 25 mph) to 20% at higher speeds (30 to 35 mph). Turbulence intensity increases dramatically in the wake by factors of about …
Date:
April 1, 1988
Creator:
Elliott, D. L.; Buck, J. W. & Barnard, J. C.
Object Type:
Report
System:
The UNT Digital Library
Selective solvent absorption in coal conversion
The objectives of this project are: (1) to determine the importance of the presence of added hydrogen donor compounds within the coal in the first stage of direct liquefaction processes; and (2) to determine the composition of the solvent absorbed by and present within the coal in the first stage of direct coal liquefaction.
Date:
April 1, 1992
Creator:
Larsen, J. W.; Lapucha, A.; Lazarov, L. & Amui, J.
Object Type:
Report
System:
The UNT Digital Library
Low-energy neutral-atom spectrometer
The design, calibration, and performance of a low energy neutral atom spectrometer are described. Time-of-flight analysis is used to measure the energy spectrum of charge-exchange deuterium atoms emitted from the PLT tokamak plasma in the energy range from 20 to 1000 eV. The neutral outflux is gated on a 1 ..mu..sec time scale by a slotted rotating chopper disc, supported against gravity in vacuum by magnetic levitation, and is detected by secondary electron emission from a Cu-Be plate. The energy dependent detection efficiency has been measured in particle beam experiments and on the tokamak so that the diagnostic is absolutely calibrated, allowing quantitative particle fluxes to be determined with 200 ..mu..sec time resolution. In addition to its present application as a plasma diagnostic, the instrument is capable of making a wide variety of measurements relevant to atomic and surface physics.
Date:
April 1, 1982
Creator:
Voss, D.E. & Cohen, S.A.
Object Type:
Report
System:
The UNT Digital Library
Polarized negative ions
This paper presents a survey of methods, commonly in use or under development, to produce beams of polarized negative ions for injection into accelerators. A short summary recalls how the hyperfine interaction is used to obtain nuclear polarization in beams of atoms. Atomic-beam sources for light ions are discussed. If the best presently known techniques are incorporated in all stages of the source, polarized H/sup -/ and D/sup -/ beams in excess of 10 ..mu..A can probably be achieved. Production of polarized ions from fast (keV) beams of polarized atoms is treated separately for atoms in the H(25) excited state (Lamb-Shift source) and atoms in the H(1S) ground state. The negative ion beam from Lamb-Shift sources has reached a plateau just above 1 ..mu..A, but this beam current is adequate for many applications and the somewhat lower beam current is compensated by other desirable characteristics. Sources using fast polarized ground state atoms are in a stage of intense development. The next sections summarize production of polarized heavy ions by the atomic beam method, which is well established, and by optical pumping, which has recently been demonstrated to yield very large nuclear polarization. A short discussion of proposed ion sources for …
Date:
April 1, 1981
Creator:
Haeberli, W.
Object Type:
Article
System:
The UNT Digital Library
Experimental W boson physics at future e sup + e sup minus linear colliders
The study of triple and quartic gauge boson vertices will be the centerpiece of experimental W boson physics at the next generation e{sup +}e{sup {minus}} linear collider. We examine the sensitivity of a {radical}{bar s} = 500 GeV e{sup +}e{sup {minus}} linear collider to anomalous structure in the W{sup +}W{sup {minus}} {gamma} and W{sup +}W{sup {minus}}Z vertices. These vertices are tested by observing the reactions e{sup {minus}} {gamma} {yields} {nu}W{sup {minus}}, {gamma}{gamma} {yields} W{sup +}W{sup {minus}}, and e{sup +}{sup {minus}} {yields} W{sup +}W{sup {minus}}. We also look at W{sup +}W{sup {minus}} rescattering in e{sup +}e{sup {minus}} {yields} W{sup +}W{sup {minus}} as a means to study W{sup +}W{sup {minus}} {yields} W{sup +}W{sup {minus}}.
Date:
April 1, 1992
Creator:
Barklow, T.L.
Object Type:
Article
System:
The UNT Digital Library
MODIFICATION OF THE EXPERIMENTAL BOILING WATER REACTOR (EBWR) FOR HIGHER- POWER OPERATION
Supplement to ANL-5607. Alterations and additions made to the Experimental Boiling Water Reactor (EBWR) plant to permit operation at power levels up to I00 Mw(t) are described. Topics covered include over-all system modifications and additions, nuclear component modifications and additions, and reboiler plant component description. (M.C.G.)
Date:
April 1, 1962
Creator:
Matousek, J.F. comp.
Object Type:
Report
System:
The UNT Digital Library
Emission cross sections and energy extraction for the mid-infrared transitions of Er, Tm, and Ho in oxide and fluoride crystals
Emission cross sections have been measured for the transitions between the two lowest spin orbit multiplets of Er, Tm, and Ho in several fluoride and oxide crystals. Properties affecting energy extraction efficiency are summarized and pulsed extraction performance is calculated for several of these quasi-three-level laser media. 4 refs., 9 figs.
Date:
April 1, 1991
Creator:
Chase, L. L.; Payne, S. A.; Smith, L. K.; Kway, W. L. & Krupke, W. F.
Object Type:
Article
System:
The UNT Digital Library
Uranium hydrogeochemical and stream-sediment reconnaissance of the Wainwright NTMS quadrangle, Alaska
This report presents results of a Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) of the Wainwright NTMS quadrangle, Alaska. In addition to this abbreviated data release, more complete data are available to the public in machine-readable form. These machine-readable data, as well as quarterly or semiannual program progress reports containing further information on the HSSR program in general, or on the Los Alamos National Laboratory (LANL) portion of the program in particular, are available from DOE's Technical Library at its Grand Junction Area Office. Presented in this data release are location data, field analyses, and laboratory analyses of several different sample media. For the sake of brevity, many field site observations have not been included in this volume; these data are, however, available on the magnetic tape. Appendices A and B describe the sample media and summarize the analytical results for each medium. The data have been subdivided by one of the Los Alamos National Laboratory sorting programs of Zinkl and others (1981a) into groups of stream-sediment and lake-sediment samples. For each group which contains a sufficient number of observations, statistical tables, tables of raw data, and 1:1,000,000 scale maps of pertinent elements have been included in this report. Also included …
Date:
April 1, 1982
Creator:
Langfeldt, S. L.; Hardy, L. C.; D'Andrea, R. F., Jr.; Zinkl, R. J. & Shettel, D. L., Jr.
Object Type:
Report
System:
The UNT Digital Library
Sandia National Laboratories ASCOT (atmospheric studies in complex terrain) field experiment, September 1980
During the period September 8 through September 25, 1980, Sandia National Laboratories, Division 4774, participated in a series of experiments held in the Geysers area of California. These experiments, aimed at providing data on nighttime drainage flow in complex terrain, were intended to provide a reliable basis for mathematical flow modeling. Tracers were released at several points on a valley rim and sampled by a large number of stations at ground level. Sandia's contribution was to make it possible to derive vertical tracer profiles. This was done by taking air samples from a captive balloon at chosen altitudes between the surface and 450 meters above ground.
Date:
April 1, 1982
Creator:
Woods, R.O.
Object Type:
Report
System:
The UNT Digital Library