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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
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
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
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
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.B0141.0344]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Bob Connor (OU Swim Coach)."
Date:
November 3, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0310]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Mr. & Mrs. Walter S. Cox with Oscilloscope bought at 1734 N Sapulpa"
Date:
November 3, 1977
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0485]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Passing through these stages, the face of a young Illinois murder victim emerges to haunt her killer after FAA restoration. Crimes (investigative Items) (Masks)"
Date:
June 3, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0170.0416]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Beta Chapter of Delta Theta Chi will have a "Holiday Bazaar" Saturday from 10 a.m. to 4 p.m. in Mutual Federal Savings and Loan Association, 3501 N MacArthur."
Date:
November 3, 1977
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0155.0265]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Presenting Supreme Court Justice Denver Davison with a special certificate for his 40 years on high court bench is Gov. David Boren."
Date:
August 3, 1977
Creator:
Vahlberg, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0146.0752]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Ainslee Cox"
Date:
October 3, 1977
Creator:
Vahlberg, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0326.0080]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Handling fragile glass with extreme care are members of Early American Glass Club Mrs. Joseph Kelso, left; Mrs. Bob Jessup, Okarche, center, and Mrs. Raymond Lockney."
Date:
May 3, 1977
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0350.0527]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "BALANCING ACT is performed by Perry Lambird, front, and Bill Gummer-son, who joined other patrons and area residents in assembling elaborate playground equipment Saturday at Wilson Elementary School, 600 NW 22."
Date:
December 3, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[News Clip: Land]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
November 3, 1977, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Southwest Airlines]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 3, 1977, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Energy]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 3, 1977, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Cassette blanket and vacuum building: key elements in fusion reactor maintenance
The integration of two concepts important to fusion power reactors is discussed. The first concept is the vacuum building which improves upon the current fusion reactor designs. The second concept, the use of the cassette blanket within the vacuum building environment, introduces four major improvements in blanket design: cassette blanket module, zoning concept, rectangular blanket concept, and internal tritium recovery. (MHR)
Date:
October 3, 1977
Creator:
Werner, R.W.
Object Type:
Article
System:
The UNT Digital Library
Solar energy school heating augmentation experiment. Sections I, II, and III. ITC report No. 281076
The Fauquier High School Solar Heating System utilizes a solar collector array of 2415 square feet active area. The collectors are mounted in a single plane which is tilted at a 53/sup 0/ angle from the horizontal. The latitude of Warrenton, Virginia is 38.6/sup 0/. Thermal storage is provided by water stored in two concrete tanks, each of 5500 gallon capacity. The tanks are insulated with 4'' of polyurethane and have a temperature loss of 1/sup 0/F per day at a temperature of 140/sup 0/F. Piping to the tanks is arranged so they can be used separately for maximum efficiency. A drain-down mode is used to provide freeze protection for the collectors. No antifreeze is used in the system. There are no heat exchangers in the system except for the classrooms where two water--air convectors are used for space heating. The convectors are equipped with a two speed fan and are sized to provide the heating requirements of the classrooms with 100/sup 0/F water storage temperatures. Back-up heating is provided with the electric resistance heaters originally installed in the classrooms. One classroom has, in addition, an oil heater. The operation, performance, maintenance, and modifications to the system over the 1974-75 …
Date:
January 3, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0310B.0139]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jay Jimerson, Boomer quarterback from Norman, sets sail on a 73-yard touchdown run."
Date:
October 3, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0348.0097]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Ron Krug"
Date:
May 3, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0323.0089]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Leon Kaufman checks out Senate voting device he will operate during legislative session."
Date:
January 3, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History