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1. Mono((8)annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes
A reproducible, high-yield synthesis of mono((8)annulene)uranium(4)dichloride (1) is reported, along with the X-ray crystal structural of the bis(pyridine) adduct. Metathesis reactions of the half-sandwich complex 1 with a variety of simple alkyl and alkoxy reagents failed to generate any isolable mono-ring complexes. Reactions of 1 with polydentate, delocalized anions did produce stable derivatives, including mono((8)annulene)uranium(4)bis(acetylacetonate) (4). An X-ray crystal structure of 4 is reported.
Date:
October 1, 1991
Creator:
Boussie, T. R.
Object Type:
Report
System:
The UNT Digital Library
1. Mono([8]annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes
A reproducible, high-yield synthesis of mono([8]annulene)uranium(4)dichloride (1) is reported, along with the X-ray crystal structural of the bis(pyridine) adduct. Metathesis reactions of the half-sandwich complex 1 with a variety of simple alkyl and alkoxy reagents failed to generate any isolable mono-ring complexes. Reactions of 1 with polydentate, delocalized anions did produce stable derivatives, including mono([8]annulene)uranium(4)bis(acetylacetonate) (4). An X-ray crystal structure of 4 is reported.
Date:
October 1, 1991
Creator:
Boussie, T. R.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
2-D and 3-D computations of curved accelerator magnets
In order to save computer memory, a long accelerator magnet may be computed by treating the long central region and the end regions separately. The dipole magnets for the injector synchrotron of the Advanced Photon Source (APS), now under construction at Argonne National Laboratory (ANL), employ magnet iron consisting of parallel laminations, stacked with a uniform radius of curvature of 33.379 m. Laplace's equation for the magnetic scalar potential has a different form for a straight magnet (x-y coordinates), a magnet with surfaces curved about a common center (r-{theta} coordinates), and a magnet with parallel laminations like the APS injector dipole. Yet pseudo 2-D computations for the three geometries give basically identical results, even for a much more strongly curved magnet. Hence 2-D (x-y) computations of the central region and 3-D computations of the end regions can be combined to determine the overall magnetic behavior of the magnets. 1 ref., 6 figs.
Date:
January 1, 1991
Creator:
Turner, L. R.
Object Type:
Article
System:
The UNT Digital Library
A 2-D imaging heat-flux gauge
This report describes a new leadless two-dimensional imaging optical heat-flux gauge. The gauge is made by depositing arrays of thermorgraphic-phosphor (TP) spots onto the faces of a polymethylpentene is insulator. In the first section of the report, we describe several gauge configurations and their prototype realizations. A satisfactory configuration is an array of right triangles on each face that overlay to form squares when the gauge is viewed normal to the surface. The next section of the report treats the thermal conductivity of TPs. We set up an experiment using a comparative longitudinal heat-flow apparatus to measure the previously unknown thermal conductivity of these materials. The thermal conductivity of one TP, Y{sub 2}O{sub 3}:Eu, is 0.0137 W/cm{center dot}K over the temperature range from about 300 to 360 K. The theories underlying the time response of TP gauges and the imaging characteristics are discussed in the next section. Then we discuss several laboratory experiments to (1) demonstrate that the TP heat-flux gauge can be used in imaging applications; (2) obtain a quantum yield that enumerates what typical optical output signal amplitudes can be obtained from TP heat-flux gauges; and (3) determine whether LANL-designed intensified video cameras have sufficient sensitivity to acquire …
Date:
July 1, 1991
Creator:
Noel, B.W.; Borella, H.M. (Los Alamos National Lab., NM (United States)); Beshears, D.L.; Sartory, W.K.; Tobin, K.W.; Williams, R.K. (Oak Ridge National Lab., TN (United States)) et al.
Object Type:
Report
System:
The UNT Digital Library
A 2-GHz Rectangular Corrugated Horn
We have designed, constructed and tested a large, rectangular horn antenna with a center frequency of 2.0 GHz, corrugated on the E-plane walls, made out of aluminum sheet. A new technique has been developed to solder thin aluminum strips onto the back plane to form the corrugations. The radiation beam pattern shows half-power beamwidths of 12{sup 0} and 14{sup 0} in the H and E planes respectively, and side lobe response below -40 dB at angles greater than 50{sup 0} from horn axis. The measured return loss is less than -20 dB (VSWR < 1.22) between 1.7 and 2.3 GHz; insertion loss is less than 0.15 dB.
Date:
October 1, 1991
Creator:
Bersanelli, M.; Bensadoun, M.; De Amici, Giovanni; Limon, M.; Smoot, George F.; Tanaka, S. et al.
Object Type:
Article
System:
The UNT Digital Library
A 10,000 A 1000 VDC solid state dump switch
The superconducting magnet test program at Fermilab requires a switch, called a dump switch, rated 10,000 A, 1000 Vdc, which must be able to continuously carry rated current. A dump resistor rated 2 MJoules, is connected in parallel with the switch contacts and dissipates the stored energy from a magnet when the switch opens. The required switch opening time is 250 {mu}sec maximum after detection of a fault or a trip command. A successful switch can be constructed from six parallel inverter type Silicon Controlled Rectifiers (SCR's) which each carry their share of the load current. These run SCR's are mounted at watercooled heatsinks and are commutated off from stored energy in capacitors. Each parallel SCR is connected in series with a 1 m{Omega} watercooled resistor to assure dc current sharing and turn on. A description of the control and construction of the switch is presented. 6 figs.
Date:
May 1, 1991
Creator:
Visser, A.
Object Type:
Article
System:
The UNT Digital Library
23 to 300{degrees}C demagnetization resistance of samarium-cobalt permanent magnets
The influence of temperature on the knee point and squareness of the M-H demagnetization characteristic of permanent magnets is important information for the full utilization of the capabilities of samarium-cobalt magnets at high temperatures in demagnetization-resistant permanent magnet devices. Composite plots of the knee field and the demagnetizing field required to produce a given magnetic induction swing below remanence were obtained for several commercial Sm{sub 2}Co{sub 17}-type magnet samples in the temperature range of 23 to 300{degrees}C. The knee point was used to define the limits of operation safe against irreversible demagnetization, and the resulting plots are interpreted to show the temperature-induction swing limits of safe magnet operation. The observed second quadrant M-H characteristic squareness is shown, by two measures, to increase gradually with temperature and to peak in the interval 200 to 300{degrees}C.
Date:
October 1, 1991
Creator:
Niedra, J. M. & Overton, E.
Object Type:
Report
System:
The UNT Digital Library
30-60 MHz FWCD system on DIII-D: Power division, phase control and tuning for a four-element antenna array
The 2 MW Fast Wave Current Drive system on DIII-D is intended to provide a near-term demonstration of up to 0.3 MA of current driven by the fast wave. The system used to drive the four element phased antenna array which produces the required directional spectrum is presented. This system must be able to cope with strong coupling between antenna elements and the time-varying plasma load seen by the antennas. Computer modelling shows that this system should be able to maintain a directional spectrum at full power under most anticipated load conditions. 5 refs., 1 fig.
Date:
November 1, 1991
Creator:
Pinsker, R. I.; Mayberry, M. J.; Petty, C. C.; Cary, W. P.; Pusl, J.; Remsen, D. (General Atomics, San Diego, CA (United States)) et al.
Object Type:
Article
System:
The UNT Digital Library
30-60 MHz FWCD system on DIII-D: Power division, phase control and tuning for a four-element antenna array
The 2 MW Fast Wave Current Drive system on DIII-D is intended to provide a near-term demonstration of up to 0.3 MA of current driven by the fast wave. The system used to drive the four element phased antenna array which produces the required directional spectrum is presented. This system must be able to cope with strong coupling between antenna elements and the time-varying plasma load seen by the antennas. Computer modelling shows that this system should be able to maintain a directional spectrum at full power under most anticipated load conditions. 5 refs., 1 fig.
Date:
November 1, 1991
Creator:
Pinsker, R. I.; Mayberry, M. J.; Petty, C. C.; Cary, W. P.; Pusl, J.; Remsen, D. et al.
Object Type:
Article
System:
The UNT Digital Library
40- angstrom FEL designs for the PEP storage ring
We explore the use of the 2.2-km PEP storage ring at SLAC to drive a 40-{Angstrom} free-electron laser in the self-amplified spontaneous emission configuration. Various combinations for electron-beam and undulator parameters, as well as special undulator designs, are discussed. Saturation and high peak, in-band, coherent power (460 MW) are possible with a 67-m, hybrid permanent-magnet undulator in a ring bypass. A 100-m, cusp-field undulator can achieve high average, in-band, coherent power (0.25 W) in the main ring. The existing, 25.6-m, Paladin undulator at LLNL, with the addition of optical-klystron dispersive sections, is considered for both peak and average power. 35 refs., 4 figs., 1 tab.
Date:
January 1, 1991
Creator:
Fisher, A. S.; Gallardo, J. C. (Brookhaven National Lab., Upton, NY (United States)); Nuhn, H. D.; Tatchyn, R.; Winick, H. (Stanford Univ., CA (United States). Stanford Synchrotron Radiation Lab.) & Pellegrini, C. (California Univ., Los Angeles, CA (United States). Dept. of Physics)
Object Type:
Article
System:
The UNT Digital Library
100 MW klystron development at SLAC
A klystron designed to operate at 11.4 GHz and 440 kV is presently SLAC's strongest rf power source candidate for the Next Linear Collider. It is expected to provide 100 MW of rf power with a pulse width of 1 microsecond. Many of the conventional tube technologies are being pushed to their limits. High electron beam power densities, rf electric gradients in cavity gaps and stresses on the ceramic rf output windows are among the most severe problems to be dealt with. This paper describes progress in the development of this device including results from single and double gap output cavities and various styles of rf output windows. 6 refs., 3 figs., 1 tab.
Date:
May 1, 1991
Creator:
Vlieks, A. E.; Callin, R. S.; Caryotakis, G.; Fant, K. S.; Fowkes, W. R.; Lee, T. G. et al.
Object Type:
Article
System:
The UNT Digital Library
110 GHz ECH on DIII-D: System overview and initial operation
A new high power electron cyclotron heating (ECH) system has been introduced on D3-D. This system is designed to operate at 110 GHz with a total output power of 2 MW. The system consists of four Varian VGT-8011 gyrotrons, (output power of 500 kW), and their associated support equipment. All components have been designed for up to a 10 second pulse duration. The 110 GHz system is intended to further progress in rf current drive experiments on D3-D when used in conjunction with the existing 60 GHz ECH (1.6 MW), and the 30--60 MHz ICH (2 MW) systems. H-mode physics, plasma stabilization experiments and transport studies are also to be conducted at 110 GHz. The present system design philosophy was based on experience gained from the existing 60 GHz ECH system. The consequences of these design decisions will be addressed as will the actual performance of various 110 GHz components.
Date:
November 1, 1991
Creator:
Cary, W. P.; Allen, J. C.; Callis, R. W.; Doane, J. L.; Harris, T. E.; Moeller, C. P. et al.
Object Type:
Article
System:
The UNT Digital Library
110 GHz ECH on DIII-D: System overview and initial operation
A new high power electron cyclotron heating (ECH) system has been introduced on D3-D. This system is designed to operate at 110 GHz with a total output power of 2 MW. The system consists of four Varian VGT-8011 gyrotrons, (output power of 500 kW), and their associated support equipment. All components have been designed for up to a 10 second pulse duration. The 110 GHz system is intended to further progress in rf current drive experiments on D3-D when used in conjunction with the existing 60 GHz ECH (1.6 MW), and the 30--60 MHz ICH (2 MW) systems. H-mode physics, plasma stabilization experiments and transport studies are also to be conducted at 110 GHz. The present system design philosophy was based on experience gained from the existing 60 GHz ECH system. The consequences of these design decisions will be addressed as will the actual performance of various 110 GHz components.
Date:
November 1, 1991
Creator:
Cary, W. P.; Allen, J. C.; Callis, R. W.; Doane, J. L.; Harris, T. E.; Moeller, C. P. et al.
Object Type:
Article
System:
The UNT Digital Library
180 MW demonstration of advanced tangentially-fired combustion techniques for the reduction of nitrogen oxide (NO sub x ) emissions from coal-fired boilers
ABB CE's Low NOx Bulk Furnace Staging (LNBFS) System and Low NOx Concentric Firing System (LNCFS) are demonstrated in stepwise fashion. These systems incorporate the concept of advanced overfire air (AOFA), clustered coal nozzles, and offset air. A complete description of the installed technologies is provided in the following section. The primary objective of the Plant Lansing Smith demonstration is to determine the long-term effects of commercially available tangentially-fired low NOx combustion technologies on NOx emissions and boiler performance. Short-term tests of each technology are also being performed to provide engineering information about emissions and performance trends. A target of achieving fifty percent NOx reduction using combustion modifications has been established for the project.
Date:
January 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
200-BP-5 operable unit Technical Baseline report
This report supports development of a remedial investigation/feasibility study work plan for the 200-BP-5 operable unit. The report summarizes baseline information for waste sites and unplanned release sites located in the 200-BP-5 operable unit. The sites were investigated by the Technical Baseline Section of the Environmental Engineering Group, Westinghouse Hanford Company (Westinghouse Hanford). The investigation consisted of review and evaluation of current and historical Hanford Site reports, drawings, and photographs, and was supplemented with recent inspections of the Hanford Site and employee interviews. No field investigations or sampling were conducted.
Date:
October 1, 1991
Creator:
Jacques, I. D. & Kent, S. K.
Object Type:
Report
System:
The UNT Digital Library
200-UP-2 Operable Unit technical baseline report
This report is prepared in support of the development of a Remedial Investigation/Feasibility Study (RI/FS) Work Plan for the 200-UP-2 Operable Unit by EBASCO Environmental, Incorporated. It provides a technical baseline of the 200-UP-2 Operable Unit and results from an environmental investigation undertaken by the Technical Baseline Section of the Environmental Engineering Group, Westinghouse Hanford Company (Westinghouse Hanford). The 200-UP-2 Operable Unit Technical Baseline Report is based on review and evaluation of numerous Hanford Site current and historical reports, Hanford Site drawings and photographs and is supplemented with Hanford Site inspections and employee interviews. No field investigations or sampling were conducted. Each waste site in the 200-UP-2 Operable Unit is described separately. Close relationships between waste units, such as overflow from one to another, are also discussed. The 200-UP-2 Operable Unit consists of liquid-waste disposal sites in the vicinity of, and related to, U Plant operations in the 200 West Area of the Hanford Site. The U Plant'' refers to the 221-U Process Canyon Building, a chemical separations facility constructed during World War 2. It also includes the Uranium Oxide (UO{sub 3}) Plant, which was constructed at the same time and, like the 221-U Process Canyon Building, was later converted …
Date:
February 1, 1991
Creator:
Deford, D. H.
Object Type:
Report
System:
The UNT Digital Library
350 MW(t) MHTGR preassembly and modularization
The Modular High Temperature Gas Cooled Reactor (MHTGR) provides a safe and economical nuclear power option for the world's electrical generation needs by the turn of the century. The proposed MHTGR plant is composed of four 350 MW(t) prismatic core reactor modules, coupled to a 2(2 {times} 1) turbine generator producing a net plant electrical output of 538 MW(e). Each of the four reactor module is located in a below-ground level concrete silo, and consists of a reactor vessel and a steam generator vessel interconnected by a cross duct vessel. The modules, along with the service buildings, are contained within a Nuclear Island (NI). The turbine generators and power generation facilities are in the non-nuclear Energy Conversion Area (ECA). The MHTGR design reduces cost and improves schedule by maximizing shop fabrication, minimizing field fit up of the Reactor Internals components and modularizing the NI ECA facilities. 3 refs., 6 figs., 2 tabs.
Date:
May 1, 1991
Creator:
Venkatesh, M.C. (General Atomics, San Diego, CA (USA)); Jones, G. (Gas-Cooled Reactor Associates, San Diego, CA (USA)); Dilling, D.A. (Bechtel International Corp., San Francisco, CA (USA)) & Parker, W.J. (Stone and Webster Engineering Corp., Boston, MA (USA))
Object Type:
Article
System:
The UNT Digital Library
A 500 kV Photoemission Electron Gun for the CEBAF FEL
The proposed FELs at CEBAF require an electron source delivering 120 pC bunches at a repetition rate of 7.485 MHz, corresponding to an average current of 0.9 mA. To meet this requirement we will employ a 500 kV DC photoemission electron gun to produce nominal 100 psec bunches of modest peak current. The subsequent injector system will bunch and accelerate this beam, producing 60 A, 2 psec bunches for the FELs. The photoemission gun will use a negative electron affinity GaAs photocathode, which provides good quantum efficiency and an adequate temporal response. The optical beam will be provided by a frequency doubled Nd:YLF laser system, actively mode locked to a subharmonic of the fundamental accelerator frequency. The principal technical difficulties associated with an electron source of this type involve the operating lifetime of the photocathode, and the operation of a high voltage gun in the presence of the alkali metals necessary to produce the photocathode. Various design a
Date:
August 1, 1991
Creator:
Sinclair, Charles
Object Type:
Report
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 19, No. 16, Ed. 1 Friday, February 1, 1991
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 1, 1991
Creator:
Garland, S. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 19, No. 19, Ed. 1 Friday, March 1, 1991
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 1, 1991
Creator:
Garland, S. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 20, No. 9, Ed. 1 Friday, November 1, 1991
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 1, 1991
Creator:
Kelly, Frank
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
1989 Walker Branch Watershed Surveying and Mapping Including a Guide to Coordinate Transformation Procedures
Walker Branch Watershed is a forested, research watershed marked throughout by a 264 ft grid that was surveyed in 1967 using the Oak Ridge National Laboratory (X-10) coordinate system. The Tennessee Valley Authority (TVA) prepared a contour map of the watershed in 1987, and an ARC/INFO{trademark} version of the TVA topographic map with the X-10 grid superimposed has since been used as the primary geographic information system (GIS) data base for the watershed. However, because of inaccuracies observed in mapped locations of some grid markers and permanent research plots, portions of the watershed were resurveyed in 1989 and an extensive investigation of the coordinates used in creating both the TVA map and ARC/INFO data base and of coordinate transformation procedures currently in use on the Oak Ridge Reservation was conducted. They determined that the positional errors resulted from the field orientation of the blazed grid rather than problems in mapmaking. In resurveying the watershed, previously surveyed control points were located or noted as missing, and 25 new control points along the perimeter roads were surveyed. In addition, 67 of 156 grid line intersections (pegs) were physically located and their positions relative to mapped landmarks were recorded. As a result, coordinates …
Date:
January 1, 1991
Creator:
Timmins, S.
Object Type:
Report
System:
The UNT Digital Library
1990 annual ground-water report K-1407-B and K-1407-C interim status units Oak Ridge K-25 Site
The Tennessee Department of Health and Environment (TDHE) Rules Governing Hazardous Waste Management require that specific ground-water information for interim status units be reported in conjunction with the annual hazardous waste treatment, storage, and disposal report (TN 1200-1-11-.05(6)(e)1 and 2). To be included in the report are, the data from annual/semiannual ground-water sampling, results of statistical analyses, and an evaluation of ground-water surface elevations for units in detection monitoring. Martin Marietta Energy Systems, Inc. manages the K-25 Site in Oak Ridge, Tennessee for the Department of Energy. Two interim status units at K-25 require ground-water monitoring, the K-1407-B and K-1407-C Holding Ponds. Both of these units were surface impoundments that have been drained and the waste sludges removed in response to the November 8, 1988, interim status closure milestone. The K-1407-C Pond was drained in mid-1987 and sludge removal activities were completed in November of 1988. The K-1407-B Pond was drained inOctober 1988, and sludge removal activities were completed in August of 1989. Both units have undergone soil sampling to verify complete sludge removal which would allow them to be ``clean closed`` under interim status regulations. Analytical results of soil samples from K-1407-C Pond are currently being evaluated and soil …
Date:
February 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
1990 annual ground-water report K-1407-B and K-1407-C interim status units Oak Ridge K-25 Site
The Tennessee Department of Health and Environment (TDHE) Rules Governing Hazardous Waste Management require that specific ground-water information for interim status units be reported in conjunction with the annual hazardous waste treatment, storage, and disposal report (TN 1200-1-11-.05(6)(e)1 and 2). To be included in the report are, the data from annual/semiannual ground-water sampling, results of statistical analyses, and an evaluation of ground-water surface elevations for units in detection monitoring. Martin Marietta Energy Systems, Inc. manages the K-25 Site in Oak Ridge, Tennessee for the Department of Energy. Two interim status units at K-25 require ground-water monitoring, the K-1407-B and K-1407-C Holding Ponds. Both of these units were surface impoundments that have been drained and the waste sludges removed in response to the November 8, 1988, interim status closure milestone. The K-1407-C Pond was drained in mid-1987 and sludge removal activities were completed in November of 1988. The K-1407-B Pond was drained inOctober 1988, and sludge removal activities were completed in August of 1989. Both units have undergone soil sampling to verify complete sludge removal which would allow them to be clean closed'' under interim status regulations. Analytical results of soil samples from K-1407-C Pond are currently being evaluated and soil …
Date:
February 1, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library