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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
[News Script: Transportation]
Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date:
October 3, 1968
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[Letter from Patsy Sharp to Jack Davis, October 3, 1991]
Photocopy of a letter from Patsy Sharp to Jack Davis, discussing that Davis write Jack Jones, of Burger King, a letter to thank him and apologize that they will not be able to bring him up to the campus. Included in the letter is Mr. Jones's address.
Date:
October 3, 1991
Creator:
Sharp, Patsy
Object Type:
Letter
System:
The UNT Digital Library
50th Anniversary, 1931-1981: symposium and banquet speeches
The proceedings includes talks given at the symposium and the banquet. They include examples of technology at the laboratory and speculation on the future at the laboratory. (GHT)
Date:
October 3, 1981
Creator:
unknown
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
Aquifer tests near the Idaho Falls Foothills, Idaho
Ground water pumping tests were performed in two wells located in the foothills east of Idaho Falls to determine the aquifer characteristics at these locations. These data were used to differentiate this aquifer from the Snake River Plain aquifer. The wells were pumped at rates of 11 and 14 gallons per minute with 0.03 and 0.04 ft of drawdown measured in the pumping wells. The transmissivity is estimated to be 525,000 gpd/ft and 450,000 gpd/ft, respectively. The hydraulic conductivity is 925 ft/day and 1,070 ft/day, respectively. These hydraulic conductivities are similar to those measured in the Snake River Plain aquifer. Water level data in these wells are consistent with the water table in the Snake River Plain aquifer and indicates ground water movement from the foothills toward the Plain. The high transmissivity suggests water may move rapidly from the foothills area to mix with water in the Snake River Plain aquifer. Elevated water temperatures (76 and 70{degrees}F) and high specific conductivities in these wells indicate the presence of a foothills aquifer with characteristics that can be used to separate the two aquifer systems.
Date:
October 3, 1991
Creator:
Hubbell, J.M.
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
[News Clip: Espy]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 3, 1994, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
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
The Mangum Star. (Mangum, Okla. Terr.), Vol. 14, No. 13, Ed. 1 Thursday, October 3, 1901
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
October 3, 1901
Creator:
Echols, R. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Leader (Guthrie, Okla.), Vol. 28, No. 37, Ed. 1 Thursday, October 3, 1918
Weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1918
Creator:
Niblack, Leslie G.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla.), Vol. 21, No. 14, Ed. 1 Saturday, October 3, 1908
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1908
Creator:
Taylor, J. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Oklahoma State Register (Guthrie, Okla.), Vol. 28, No. 24, Ed. 1 Thursday, October 3, 1918
Weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1918
Creator:
Golobie, John
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat. (Altus, Okla.), Vol. 1, No. 29, Ed. 1 Thursday, October 3, 1907
Weekly newspaper from Altus, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
October 3, 1907
Creator:
Williams, Bob
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat (Altus, Okla.), Vol. 5, No. 30, Ed. 1 Thursday, October 3, 1912
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1912
Creator:
Kirk, Brant
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla. Terr.), Vol. 20, No. 14, Ed. 1 Thursday, October 3, 1907
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
October 3, 1907
Creator:
Echols, R. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Weekly Oklahoma State Capital. (Guthrie, Okla.), Vol. 8, No. 24, Ed. 1 Saturday, October 3, 1896
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
October 3, 1896
Creator:
Greer, Frank H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Weekly News (Altus, Okla.), Vol. 19, No. 32, Ed. 1 Thursday, October 3, 1918
Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date:
October 3, 1918
Creator:
Orr, J. P.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star And Southwest Eagle (Mangum, Okla.), Vol. 31, No. 16, Ed. 1 Thursday, October 3, 1918
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1918
Creator:
Jessee, Elmer V.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Cushing Independent. (Cushing, Okla.), Vol. 6, No. 43, Ed. 1 Thursday, October 3, 1907
Weekly newspaper from Cushing, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
October 3, 1907
Creator:
Holland, Al. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 28, No. 31, Ed. 1 Thursday, October 3, 1918
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1918
Creator:
Denny, J. Q.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 9, No. 2, Ed. 1 Friday, October 3, 1913
Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1913
Creator:
Henderson, J. B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 22, No. 30, Ed. 1 Thursday, October 3, 1912
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 3, 1912
Creator:
Zimmerman, Warren
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Kiowa Sentinel. (Kiowa, Indian Terr.), Vol. 4, No. 38, Ed. 1 Thursday, October 3, 1907
Weekly newspaper from Kiowa, Indian Territory that includes local, territorial, and national news along with advertising.
Date:
October 3, 1907
Creator:
Vernon, John C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History