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New generation of arc and arc filament power supplies for pulsed neutral beams
The new Tandem Mirror Experiment (TMX) facility at LLL requires that neutral beams operate for pulse lengths between 25 and 100 ms. The inevitable increase in cost over the present 12-ms pulse length capability dictated that a more economical alternative to the pulse forming networks and the transformer-type arc filament power supplies currently in use be found. A study of the various alternatives and design requirements revealed that battery banks are the most economical alternative. The thermionic arc filaments have relatively simple power-supply requirements in terms of control and regulation. The battery arc filament power supply controls and electromechanical hardware heat the filaments to provide the electrons which produce the plasma. Component testing revealed problems that must be addressed in the finished production design. The battery arc power supply poses a difficult set of requirements for current control. The TMX requires current control accuracy of +-1.0 percent and rise/fall times of 50 ..mu..s. These requirements are met with a novel thyristor switching circuit. The features of the four-section battery bank design, capable of a total of 4000 A at 58 V dc, are detailed. Control hardware compatible with the current generation of pulse-forming network hardware has been developed. The cost …
Date:
October 3, 1977
Creator:
Santamaria, G.T.
Object Type:
Article
System:
The UNT Digital Library
Estimate of earth media shear strength at the Nevada Test Site
A method is presented of estimating the effective shear strength of the fractured rock that surrounds a nuclear detonation. To do this, we measure the cavity radii from previous detonations. We also use numerical computer codes to model the explosion phenomenology and develop the functional relationship between the normalized cavity displacement and the normalized shear strength of the rock. In this sense, the computer codes serve as replica models that are dimensionally analyzed to interpret the field experience. We separate the effects of gravity and overburden pressure from the effects of the material properties and give scaling laws for each. We have analyzed approximately 300 nuclear detonations at the Nevada Test Site (NTS) and have found that the most frequent shear strengths are between 0.020 and 0.060 kbars. They are also essentially independent of the depth-of-burial ranges considered. We obtained good agreement between predicted shear strengths and those measured from core samples for different areas at the Nevada Test Site.
Date:
November 3, 1977
Creator:
Terhune, R. W. & Glenn, H. D.
Object Type:
Report
System:
The UNT Digital Library
Numerical methods for laser fusion
The LASNEX computer code was developed to study the many interrelated physical processes important in the effort to achieve laser initiated fusion. It has been used to calculate the results of numerous laser plasma experiments and to design targets and determine desirable laser pulse characteristics for future experiments. Some processes, such as hydrodynamics, are well formulated in fundamental equations and can be solved with high accuracy by sophisticated numerical methods. Other processes, such as laser absorption and electron transport, are less well understood and do not, in general, warrant the use of highly accurate techniques. Numerical models were chosen that adequately represent each physical process, keeping in mind its inherent uncertainties, the importance of the process to the overall calculation, and its effect on the determination of experimental observables.
Date:
November 3, 1977
Creator:
Zimmerman, G.B.
Object Type:
Article
System:
The UNT Digital Library
Performance test of a Lysholm engine
None
Date:
July 3, 1975
Creator:
Weiss, H.; Steidel, R. & Lundberg, A.
Object Type:
Report
System:
The UNT Digital Library
Uranium miner lung cancer study. Progress report, July 1, 1976--July 1, 1977
This study was initiated in 1957 by the U.S. Public Health and many facets of this project are reaching final objectives. Many new studies have developed in the course of this study and will continue. The projects supported by the Energy Research and Development Administration are of utmost importance and consist of: collection of material from uranium miners known to have cancer of the lung into a tumor registry; manual on pulmonary cytology; regression study of sputum cytological findings in uranium miners who showed marked atypical squamous cell metaplasia and have quit smoking cigarettes, mining, or both; continuation of sputum collection and collection of lungs from deceased miners; sensory development for localization of carcinoma in situ of the lung; and lung histology program. Since we have examined approximately 77,000 sputum samples over the last 20 years in cases that showed normal cytology at the inception of the study and some subsequently developed carcinoma of the lung, we have an accumulation of material that is worthy of study and presentation.
Date:
October 3, 1977
Creator:
Saccomanno, G.
Object Type:
Report
System:
The UNT Digital Library
Engineering of beam direct conversion for a 120-kV, 1-MW ion beam
Practical systems for beam direct conversion are required to recover the energy from ion beams at high efficiency and at very high beam power densities in the environment of a high-power, neutral-injection system. Such an experiment is now in progress using a 120-kV beam with a maximum total current of 20 A. After neutralization, the H/sup +/ component to be recovered will have a power of approximately 1 MW. A system testing these concepts has been designed and tested at 15 kV, 2 kW in preparation for the full-power tests. The engineering problems involved in the full-power tests affect electron suppression, gas pumping, voltage holding, diagnostics, and measurement conditions. Planning for future experiments at higher power includes the use of cryopumping and electron suppression by a magnetic field rather than by an electrostatic field. Beam direct conversion for large fusion experiments and reactors will save millions of dollars in the cost of power supplies and electricity and will dispose of the charged beam under conditions that may not be possible by other techniques.
Date:
October 3, 1977
Creator:
Barr, W. L.; Doggett, J. N.; Hamilton, G. W.; Kinney, J. D. & Moir, R. W.
Object Type:
Article
System:
The UNT Digital Library
In situ coal gasification progress on the experimental and calculational Coal Fracture Program, July--November 1974. [Goal of program is to develop physically meaningful model based on experimental data to be used in simulation coals for design of in situ coal gasification experiments]
None
Date:
January 3, 1975
Creator:
Larson, D. B.; Anderson, G. D.; Butkovich, T. R. & Hearst, J. R.
Object Type:
Report
System:
The UNT Digital Library
LOFT emergency core coolant thermal analysis Class I review
The LOFT Emergency Core Coolant Piping Thermal Analysis was checked to insure that the calculations made would conservatively satisfy the requirements in the LOFT technical specifications. Some of the boundary conditions used have not been shown to be conservative and require review and possible re-analysis. One of the thermal models used could not be clearly related to a specific part of the piping geometry and requires further explanation. The remainder of the models, the use of the SIMIR code and the other boundary conditions appear conservative and reflect normal thermal analysis methodology and practice. However, the use of constant, rather than temperature varying, thermal properties for some materials may introduce a slight error in these analyses.
Date:
February 3, 1978
Creator:
Kinnaman, T.L.
Object Type:
Report
System:
The UNT Digital Library
Propagation of a heavy ion beam in gas-filled reactor
A heavy ion beam traversing a gas-filled reactor is stripped of its electrons along its path. The propagation of the stripping beam with possible associated instabilities has been investigated.
Date:
November 3, 1977
Creator:
Yu, S. S.; Buchanan, H. L.; Chambers, F. W. & Lee, E. P.
Object Type:
Article
System:
The UNT Digital Library
Near Term Hybrid Passenger Vehicle Development Program. Phase I, Final report. Appendix D: sensitivity analysis
This report on the Sensitivity of Mission Analysis and Trade-off Studies provides an analysis of the sensitivity of the results of previous mission analysis and performance specification studies to the possible variations of the values of significant parameters as projected to the year 1985. These parameters include vehicle usage by purpose, driving cycles, trip lengths, ownership projections, and life-cycle costs. Tabulated data are included from calculations with variations in these parameters. (LCL)
Date:
July 3, 1979
Creator:
Traversi, M.
Object Type:
Report
System:
The UNT Digital Library
Radiation levels from fission products released to the pressure suppression tank
This LTR discusses radiation levels associated with a LOCE where the blowdown is directed to the pressure suppression tank.
Date:
March 3, 1978
Creator:
Maringas, N.
Object Type:
Report
System:
The UNT Digital Library
Atomic data needs for beam transport in gas
Determination of the parameters Z/sub eff/, electrical conductivity, plasma density, and the plasma temperature is essential in the study of heavy ion beam transport in gas. The calculation of these parameters require input from atomic physics. This note is an attempt to make these needs known to atomic physicists.
Date:
November 3, 1977
Creator:
Yu, S. S.
Object Type:
Article
System:
The UNT Digital Library
Hot low Btu producer gas desulfurization in fixed bed of iron oxide fly-ash. Quarterly report No. 1, 1 July--30 September 1975
None
Date:
December 3, 1975
Creator:
Gussow, S. & Mitchell, M. M., Jr.
Object Type:
Report
System:
The UNT Digital Library
Acceleration systems for heavy-ion beams for inertial confinement fusion
The requirements for a heavy-ion demonstration experiment to achieve useful electric power generation through inertial confinement fusion are discussed. (MOW)
Date:
October 3, 1977
Creator:
Faltens, A.; Judd, D.L. & Keefe, D.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0361.0124]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Perhaps it seemed unjust that fire would destroy the home of Mr. and Mrs. Ralph Ensey - the home where they had cared for more than 200 homeless children. Somebody read the newspaper account of the blaze last week and today mailed $7 to be passed along to the couple as a "token of concern."
Date:
August 3, 1971
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0366.0037]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Fireman Jim Evans"
Date:
January 3, 1972
Creator:
Heaton, Dave
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0296.0155]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Sunday was Mrs. Oscar Day's last official day of operating the nursery at the First United Methodist Church in Durant after 52 years in the job."
Date:
September 3, 1973
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0291.0230]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Professor Raymond D. Daniels, director of the School of Chemical Engineering and Materials Science at the University of Oklahoma, are among"
Date:
April 3, 1970
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0291.0251]
Photograph taken for a newspaper owned by the Oklahoma Publishing Company.
Date:
August 3, 1972
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0311.0421]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "MISS JUNIOR ACHIEVEMENT for 1973 is Maura Doyle, 16, being crowned by her escort Saturday night after ceremonies at the Skirvin Plaza Hotel ."
Date:
March 3, 1973
Creator:
Traverse, Cliff
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0237.0117]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "An Oklahoma Gas and Electric Co. supervisor has been appointed director of the Metropolitan Oklahoma City branch of the National Alliance of Businessmen. B.J. Cook, 3300 NW 26, was named to the post by Wayne A. Parker, Oklahoma City NAB chairman."
Date:
September 3, 1970
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0232.0612]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Actress Connie Colgan could be in St, Louis this season with the Municipal Opera."
Date:
July 3, 1973
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Basement Box 51.0132]
Caption: "FIREMEN BATTLE to save a pair of garage apartments at 1624 NW 41 that caught fire Wednesday morning after an apparent short in wiring. Five fire department units worked 20 minutes to extinguish the blaze, but both apartments were destroyed with a total damage $1,400 to the building and contents." Firemen on roof of burning house.
Date:
January 3, 1973
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0296.0145]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "There is no incumbent in House District 75 where two Democrats face each other in the Aug. 22 primary."
Date:
August 3, 1972
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History