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Results:
1 - 24 of
43,234
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1. 5 GeV/c multiturn shaving extraction and its transport line for the Brookhaven AGS
A system for fast shaving extraction at 1.5 GeV/c is implemented to extract the circulating beam in five turns. A numerical simulation is first carried out to determine the emittance and the rf structure of the extracted beam. This is followed by several machine study sessions which establish the optimal extraction configuration, confirm the emittance, and modify the transport line for low energy beam. Finally, a one-week run for the Neutrino Oscillation experiment demonstrates that the system is very stable and capable of delivering 7.5 x 10/sup 12/ p/sec with 70% extraction efficiency and 95% transport efficiency.
Date:
January 1, 1979
Creator:
Weng, W. T.; Blumberg, L. N.; Gill, E.; Soukas, A.; Witkover, R. L.; Egleman, E. et al.
Object Type:
Article
System:
The UNT Digital Library
1.5 megawatt dc chopper power supplies for plasma shape control on Doublet III
The Doublet III device is designed to study noncircular plasmas, including doublet and dee-shaped cross-sections. The plasma shape is determined by a system of 24 field-shaping coils which surround the vacuum vessel. Control of the magnetic flux linking these coils allows the plasma shape to be varied and controlled. This paper describes the high-speed dc chopper which is a major component of the field-shaping coil power system. The high-speed dc choppers, with a frequency response of up to 5 kHz and a switching power capability of 1.5 megawatts are used for fine tuning and feedback control of the plasma position and shape. The design and operation of two 1.5 megawatt, 3 kHz choppers used on closed loop plasma control experiments will be presented.
Date:
November 1979
Creator:
Rock, P. J. & Wesley, J. C.
Object Type:
Article
System:
The UNT Digital Library
1-GWh diurnal load-leveling Superconducting Magnetic Energy Storage system reference design
A point reference design has been completed for a 1-GWh Superconducting Magnetic Energy Storage system. The system is for electric utility diurnal load-leveling but can also function to meet much faster power demands including dynamic stabilization. This study explores several concepts of design not previously considered in the same detail as treated here. Because the study is for a point design, optimization in all respects is not complete. This report examines aspects of the coil, the superconductor supported off of the dewar shell, the dewar shell, and its configuration and stresses, the underground excavation and construction for holding the superconducting coil and its dewar, the helium refrigeration system, the electrical converter system, the vacuum system, the guard coil, and the costs. This report is divided into two major portions. The first is a general treatment of the work and the second is seven detailed technical appendices issued as separate reports. The information presented on the aluminum stabilizer for the conductor, on the excavation, and on the converter is based upon industrial studies contracted for this work.
Date:
September 1, 1979
Creator:
Rogers, J. D.; Hassenzahl, W. V. & Schermer, R. I. (comps.)
Object Type:
Report
System:
The UNT Digital Library
1-GWh diurnal load-leveling superconducting magnetic energy storage system reference design. Appendix A: energy storage coil and superconductor
The technical aspects of a 1-GWh Superconducting Magnetic Energy Storage (SMES) coil for use as a diurnal load-leveling device in an electric utility system are presented. The superconductor for the coil is analyzed, and costs for the entire coil are developed.
Date:
September 1, 1979
Creator:
Schermer, R.I.
Object Type:
Report
System:
The UNT Digital Library
1-GWh diurnal load-leveling superconducting magnetic energy storage system reference design. Appendix B: cost study, high-purity aluminum production
Cost information is supplied for aluminum with purities of 200, 2000, and 5000 residual resistivity ratio. Two production situations were used for each purity: (1) 1 x 10/sup 6/ kg/yr production rate with a 30-yr sustaining market and (2) 1 x 10/sup 6/ kg/yr production rate for 2 yrs only. These productions and purities are of interest for manufacturing devices for Superconducting Magnetic Energy Storage. The cost study results are presented as a range and include (1) the selling price of the aluminum for each case, (2) the cost of facilities including construction, engineering, and related costs, (3) the cost of money and depreciation (interest/amortization), and (4) the energy costs - the total of power and fuel. The range is affected by possible production variations and other uncertainties. Information is also given on plant location options and the preferred feed to the purification facility (with ore source effects).
Date:
September 1, 1979
Creator:
Cochran, C. N.; Dawless, R. K. & Whitchurch, J. B.
Object Type:
Report
System:
The UNT Digital Library
1-GWh diurnal load-leveling superconducting magnetic energy storage system reference design. Appendix C: dewar and structural support
The mechanical aspects of the dewar to contain a 1-GWh superconducting coil in a 1.8 K helium bath and the means for supporting the coil and dewar against the rock of an underground excavation created for just that purpose are presented.
Date:
September 1, 1979
Creator:
Bennett, J. G. & Ju, F. D.
Object Type:
Report
System:
The UNT Digital Library
1-GWh diurnal load-leveling superconducting magnetic energy storage system reference design. Appendix D: superconductive magnetic energy storage cavern construction methods and costs
The excavation and preparation of an underground cavern to contain a 1-GWh diurnal load-leveling Superconducting Magnetic Energy Storage (SMES) unit is examined. The cavern's principal function is to provide a rock structure for supporting the magnetic forces from the charged storage coil. Certain economic considerations indicate the refrigerator cold box for the helium system should also be underground. The study includes such a provision and considers, among other things, rock bolting, water seepage, concrete lining of the walls, steel bearing pads, a system to prevent freezing of the walls, a mining schedule, and costs.
Date:
September 1, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
1-GWh diurnal load-leveling superconducting magnetic energy storage system reference design. Appendix F. 1-GWh electrical system design
Two circuit configurations for reducing the installed converter power and cost of high-power converter systems that operate in a constant-power mode over a wide current and voltage range are suggested and analyzed.
Date:
September 1, 1979
Creator:
Boenig, H. J.
Object Type:
Report
System:
The UNT Digital Library
S-1 project. Volume I. Architecture. 1979 annual report
The US Navy is one of the world's largest users of digital computing equipment having a procurement cost of at least $50,000, and is the single largest such computer customer in the Department of Defense. Its projected acquisition plan for embedded computer systems during the first half of the 80s contemplates the installation of over 10,000 such systems at an estimated cost of several billions of dollars. This expenditure, though large, is dwarfed by the 85 billion dollars which DOD is projected to spend during the next half-decade on computer software, the near-majority of which will be spent by the Navy; the life-cycle costs of the 700,000+ lines of software for a single large Navy weapons systems application (e.g., AEGIS) have been conservatively estimated at most of a billion dollars. The S-1 Project is dedicated to realizing potentially large improvements in the efficiency with which such very large sums may be spent, so that greater military effectiveness may be secured earlier, and with smaller expenditures. The fundamental objectives of the S-1 Project's work are first to enable the Navy to be able to quickly, reliably and inexpensively evaluate at any time what is available from the state-of-the-art in digital processing …
Date:
January 1, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
S-1 project. Volume II. Hardware. 1979 annual report
This volume includes highlights of the design of the Mark IIA uniprocessor (SMI-2), and the SCALD II user's manual. SCALD (structured computer-aided logic design system) cuts the cost and time required to design logic by letting the logic designer express ideas as naturally as possible, and by eliminating as many errors as possible - through consistency checking, simulation, and timing verification - before the hardware is built. (GHT)
Date:
January 1, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
1 to 12 GeV/c beam transport for transverse or longitudinally polarized protons
A two-stage beam transport for polarized protons has been constructed and operated at the Argonne ZGS. The first stage delivers vertically polarized protons (N-type) to an elastic scattering polarimeter consisting of a 10 cm long LH/sub 2/ target and two moveable sets of forward and recoil scintillation counters. The unscattered protons transported through the beam's second stage are focused onto the polarized proton target PPT-III; this target utilizes a 2.5 T R and A magnet to produce target polarizations in the horizontal plane, either in the beam direction (L-type) or transverse to it (S-type). The second stage of the beam is equipped with a combination of superconducting solenoids and dipole magnets; thus the beam polarization can also be rotated to point in the L or S direction. The entire system has been operated successfully over the momentum range 1.0 to 11.75 GeV/c with NS, LS, SS, and LL beam target spin directions.
Date:
January 1, 1979
Creator:
Colton, E. P.
Object Type:
Article
System:
The UNT Digital Library
2 meg-ampere prototype levitated coil for multipole fusion
The coils major diameter is 1.0 meter and it occupies a cross-section which is about 0.2 meter minor in diameter. The prototype coil will carry four times the current of the largest such magnet built to date. As a result, the peak induction in the coil is about 8 T and the stored magnetic energy will be around 3 MJ. The paper describes the proposed Nb/sub 3/SN superconductor, the quench protection system which is based on the LBL shorted secondary concept, the isochroic refrigeration storage system which stores about 5 kJ of refrigeration between 4.5/sup 0/K and 7/sup 0/K, and the persistent switch.
Date:
November 1, 1979
Creator:
Green, M. A. & Glueck, R.
Object Type:
Article
System:
The UNT Digital Library
[3 Cans Birdhouse, 1979]
Photograph of three trash cans lined against a wooden fence. A birdhouse with a bird painted on it appears over the fence. The fence conjoins with a one-story house on its left side and many other houses line the horizon behind it. [1979, Chicago, IL]
Date:
1979
Creator:
Doherty, Richard
Object Type:
Photograph
System:
The UNT Digital Library
3 for 5
Access:
Use of this item is restricted to the UNT Community
Recording of Richard Zvonar's 3 for 5 for percussion, performed by Daryl Pratt. The piece is divided into three movements, with a different set of instruments for each. These are set up in three locations, which form an arc left to right across the performance area. Four playback speakers are situated beside and between the three playing locations. The tape sounds are entirely derived from recorded sounds of the percussion instruments. Throughout the piece, the live and recorded sounds continuously diverge as the piece progresses until at the end, the original sounds have been greatly expanded and enriched through speed transposition, mixing, filtering, etc.
Date:
1979
Creator:
Zvonar, Richard
Object Type:
Sound
System:
The UNT Digital Library
10. 6. mu. m damage threshold measurements on sub-one-hundred-ps pyroelectric detectors
Sub-one-hundred-ps response time pyroelectric detectors are being developed at Los Alamos Scientific Laboratory (LASL) to be compatible with the 5-GHz oscilloscope direst-access mode of operation without damage. Strontium barium niobate, lithium tantalate, lanthanum-doped lead zirconate, and lithium niobate are being evaluated for use in the edge and coplanar configurations. Devices designed at LASL are compared with commercially available detectors. Test results of a less than 15-ps risetime, 31-ps fall time 50/50 SBN pyroelectric detector are reported. Measurements to date of the damage threshold at 10.6 ..mu..m of the above materials in bulk, with various surface treatments, and in devices using 100-ps to 100-..mu..s pulses are also reported.
Date:
January 1, 1979
Creator:
Stotlar, S. C.; McLellan, E. J.; Gibbs, A. J. & Webb, J.
Object Type:
Article
System:
The UNT Digital Library
10-MWe solar-thermal central-receiver pilot plant: collector subsystem foundation construction. Revision No. 1
Bid documents are provided for the construction of the collector subsystem foundation of the Barstow Solar Pilot Plant, including invitation to bid, bid form, representations and certifications, construction contract, and labor standards provisions of the Davis-Bacon Act. Instructions to bidders, general provisions and general conditions are included. Technical specifications are provided for the construction. (LEW)
Date:
December 18, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
10-MWe solar-thermal central-receiver pilot plant. Operating and maintenance manual
Information required to perform the initial program loading and operation of the Heliostat Array Controller (HAC) is provided. Operating activities are described as required for heliostat control. All computer console command steps, from power up to power down are described. Detailed steps are provided to wake up the system and direct heliostat beams to standby, on target, standby to stow and power down. Maintenance requirements (preventive and corrective), reparability (reparable - non-reparable decisions), spares identification, spares storage location, replacement levels, replacement location and repair location are established. Individual system breakdown block diagrams are provided for each system/assembly/subassembly. Maintenance and repair description sheets are provided for each maintenance significant item. The manual provides support of the following equipment: (a) helostat assembly; (b) heliostat control assembly; and (c) maintenance and installation equipment. The safety requirements for the operating and maintenance functions are established. These procedures will assist in eliminating or controlling the accident potentials caused by human error, environment, or component malfunctions or interactions that could result in major injury or fatality to operating or visiting personnel, or damage to subsystem components or support equipment. These procedures are for normal and test operating conditions and emergency situations, and apply to all Martin …
Date:
August 1, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
10-MWe solar-thermal central-receiver pilot plant. Phase II. Planning
The various considerations related to the Phase II schedules, material control and personnel training required to effectively implement the program are presented. The flow charts and schedules required to accomplish fabrication, installation, checkout, and personnel training to support the Pilot Plant schedule are identified. The planning addresses receiving, storage and shipment of raw materials, subassemblies, component, subsystems, and complete assemblies. The vendor activities and the major Martin Marietta facilities are included. These are the Mirror Assembly activities at Pueblo, Colorado and the heliostat assembly and installation activities at the Barstow-Daggett Airport and the solar plant. (LEW)
Date:
August 1, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
12. 5 MHz heavy ion linac for ion beam fusion
Argonne National Laboratory (ANL) is currently developing the injector of a heavy ion beam driver for the inertial confinement fusion program. The first phase of the program is to accelerate about 20 mA of Xe/sup +1/ from a 1.5 MV preaccelerator 11.4 MeV in a low-beta RF linac. The first section of the linac utilizes a single harmonic buncher and independently-phased short linac resonators with a FODO magnetic quadrupole focusing lattice. These are followed by two double-stub Wideroee linacs. A layout of the linac up to 6.4 MeV is shown. The operating parameters of the low-beta linac are given. This paper gives details of the low-beta linac design and results of low power measurements on the first accelerating cavity.
Date:
1979
Creator:
Moretti, A.; Watson, J. M.; Moenich, J. S.; Foss, M. H.; Khoe, T. K.; Colton, E. P. et al.
Object Type:
Article
System:
The UNT Digital Library
12: Artists Working in North Texas [Exhibition Photographs]
Photographs of the exhibition, "12: Artists Working in North Texas," September 26-October 28, 1979, held at the Dallas Museum of Fine Arts. Photographs documenting this exhibition include twenty-two gallery installation views.
Date:
1979
Creator:
Dallas Museum of Fine Arts
Object Type:
Collection
System:
The Portal to Texas History
12: Artists Working in North Texas [Invitiation]
Invitation from the exhibition, "12: Artists Working in North Texas," September 26–October 28, 1979, held at the Dallas Museum of Fine Arts.
Date:
1979
Creator:
Dallas Museum of Fine Arts
Object Type:
Text
System:
The Portal to Texas History
12: Artists Working in North Texas [Letter]
Letter from the exhibition, "12: Artists Working in North Texas," September 26–October 28, 1979, held at the Dallas Museum of Fine Arts.
Date:
1979
Creator:
Dallas Museum of Fine Arts
Object Type:
Text
System:
The Portal to Texas History
12: Artists Working in North Texas [Photograph DMA_0259-01]
Photograph of the exhibition, "12: Artists Working in North Texas," September 26-October 28, 1979, held at the Dallas Museum of Fine Arts.
Date:
1979
Creator:
Dallas Museum of Fine Arts
Object Type:
Photograph
System:
The Portal to Texas History
12: Artists Working in North Texas [Photograph DMA_0259-02]
Photograph of the exhibition "12: Artists Working in North Texas," September 26-October 28, 1979, held at the Dallas Museum of Fine Arts.
Date:
1979
Creator:
Dallas Museum of Fine Arts
Object Type:
Photograph
System:
The Portal to Texas History