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496 Matching Results
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Magnetic shielding design analysis
Two passive magnetic-shielding-design approaches for static external fields are reviewed. The first approach uses the shielding solutions for spheres and cylinders while the second approach requires solving Maxwell's equations. Experimental data taken at LLNL are compared with the results from these shieldings-design methods, and improvements are recommended for the second method. Design considerations are discussed here along with the importance of material gaps in the shield.
Date:
December 27, 1983
Creator:
Kerns, J.A.; LaPaz, A.D. & Fabyan, J.
Object Type:
Article
System:
The UNT Digital Library
Laser-fusion rocket for interplanetary propulsion
A rocket powered by fusion microexplosions is well suited for quick interplanetary travel. Fusion pellets are sequentially injected into a magnetic thrust chamber. There, focused energy from a fusion Driver is used to implode and ignite them. Upon exploding, the plasma debris expands into the surrounding magnetic field and is redirected by it, producing thrust. This paper discusses the desired features and operation of the fusion pellet, its Driver, and magnetic thrust chamber. A rocket design is presented which uses slightly tritium-enriched deuterium as the fusion fuel, a high temperature KrF laser as the Driver, and a thrust chamber consisting of a single superconducting current loop protected from the pellet by a radiation shield. This rocket can be operated with a power-to-mass ratio of 110 W gm/sup -1/, which permits missions ranging from occasional 9 day VIP service to Mars, to routine 1 year, 1500 ton, Plutonian cargo runs.
Date:
September 27, 1983
Creator:
Hyde, R.A.
Object Type:
Article
System:
The UNT Digital Library
Transients - abnormal and otherwise
Information is presented concerning transients in research reactors and nuclear power plants.
Date:
September 27, 1983
Creator:
Hendrie, J. M.
Object Type:
Article
System:
The UNT Digital Library
Initial simultaneous Thomson-scattering measurements in the TMX-U tandem mirror
In this report, we briefly describe the TMX-U Thomson-scattering systems; we compare TMX-U velocity-distribution measurements with computer modeling; and we present and discuss our first simultaneous measurements of end-plug and central-cell electron temperatures.
Date:
December 27, 1983
Creator:
Goodman, R.K. & Rognlien, T.D.
Object Type:
Report
System:
The UNT Digital Library
Tunnel construction for a desertron
The tunnel in this model of construction is 3-1/2 feet wide by 5 feet high. It is assumed that the tunnel contains a rail system and guidance system for: (1) An enclosed car used for transport of 2 people and some tools. (2) A magnet mover. This robot could pick up a magnet and transport it at about 10 miles per hour. (3) An alignment robot. The alignment robot would intercept E.M. waves (microwaves, lasers) to determine its position in the tunnel. Then workers could come along inside the tunnel hoop and nail it together and to the floor. The trench would then be back-filled with a 1 foot berm on top. A rail system would be installed and a support stand for the magnet.
Date:
March 27, 1983
Creator:
Hinterberger, H. & Huson, F.R.
Object Type:
Report
System:
The UNT Digital Library
300-Area accident analysis for Emergency Planning Zones
The Department of Energy has requested SRL assistance in developing offsite Emergency Planning Zones (EPZs) for the Savannah River Plant, based on projected dose consequences of atmospheric releases of radioactivity from potential credible accidents in the SRP operating areas. This memorandum presents the assessment of the offsite doses via the plume exposure pathway from the 300-Area potential accidents. 8 refs., 3 tabs.
Date:
June 27, 1983
Creator:
Pillinger, W.L.
Object Type:
Report
System:
The UNT Digital Library
Design requirement for dual air supplies to melter borescope
The long term survivability and usefulness of the melter surface viewing borescopes would be greatly increased if a method of remote lense cleaning was available. The two units to be installed on the DWPF melter will incorporate air cooling and lense purging into their design. At present a single air supply line would serve both needs. Separating the two air services will allow the introduction of water or steam into the purge service. Tests on the prototype borescope at ETF have shown this to be an extremely effective way of cleaning the lense of occasional deposits or splatter. It is recommended that this change be incorporated into the DWPF design.
Date:
June 27, 1983
Creator:
Heckendorn, F.M.
Object Type:
Report
System:
The UNT Digital Library
Damping beam displacements through phase mixing: an illustrative model
We develop a simple model of a beam transported in a hard wall channel (an idealized very-high-order magnetic-multipole channel). The extremely anharmonic nature of the potential leads to damping of coherent transverse displacements of the beam via phase mixing. For the case of small uniform displacements of the beam we can write down by inspection the analytical form of the motion of the beam centroid. The same technique allows us to evaluate the effects of focussing and scattering elements in the transport channel upon the damping of the transverse motion of the beam.
Date:
May 27, 1983
Creator:
Barletta, W. A. & Briggs, R. J.
Object Type:
Article
System:
The UNT Digital Library
Uranium oxidation: characterization of oxides formed by reaction with water
Three different uranium oxide samples have been characterized with respect to the different preparation techniques. Results show that the water reaction with uranium metal occurs cyclically forming laminar layers of oxide which spall off due to the strain at the oxide/metal interface. Single laminae are released if liquid water is present due to the prizing penetration at the reaction zone. The rate of reaction of water with uranium is directly proportional to the amount of adsorbed water on the oxide product. Rapid transport is effected through the open hydrous oxide product. Dehydration of the hydrous oxide irreversibly forms a more inert oxide which cannot be rehydrated to the degree that prevails in the original hydrous product of uranium oxidation with water. 27 figures.
Date:
April 27, 1983
Creator:
Fuller, E.L. Jr.; Smyrl, N.R.; Condon, J.B. & Eager, M.H.
Object Type:
Report
System:
The UNT Digital Library
Cytometric analysis of mammalian sperm for induced morphologic and DNA content errors
Some flow-cytometric and image analysis procedures under development for quantitative analysis of sperm morphology are reviewed. The results of flow-cytometric DNA-content measurements on sperm from radiation exposed mice are also summarized, the results related to the available cytological information, and their potential dosimetric sensitivity discussed. (ACR)
Date:
June 27, 1983
Creator:
Pinkel, D.
Object Type:
Article
System:
The UNT Digital Library
Physics of the synchrotron model of cosmic gamma-ray bursts
We review the theoretical arguments leading to the thermal synchrotron model of cosmic gamma-ray bursts. We propose a magnetic flare-resonant absorption mechanism for the production of the hot electrons that can account for most of the unusual properties of the emission layer.
Date:
September 27, 1983
Creator:
Liang, E.P.
Object Type:
Article
System:
The UNT Digital Library
Measurements of the emittance and current density profile of the beam produced by the ATA injector
Measurements of the normalized emittance of the beam produced by the Advanced Test Accelerator (ATA) injector yielded values near 0.4 Radian-Centimeters at currents up to 10 kAmps. The instrument was also used to obtain beam-current-density profiles in two dimensions at the entrance mask of the instrument.
Date:
June 27, 1983
Creator:
Fessenden, T.J.
Object Type:
Report
System:
The UNT Digital Library
Why superferric magnets for a desertron
It has been proposed by R.R. Wilson and L. Lederman that it may be advantageous and cheaper to construct a large accelerator (> 10 TeV) with superferric magnets (approx. 2.5 Tesla). We take as a premise that a sufficiently large piece of land is available for the accelerator (see paper on Site and Tunnel), that is, one is not limited by the radius of the tunnel. The word superferric has been interpreted to mean a super conducting magnet where the coils are used principally to drive the field in the steel. We also add the constraint of simplicity and keep the coil shaped in a rectangle with no more than a few turns.
Date:
March 27, 1983
Creator:
Huson, F.R.
Object Type:
Report
System:
The UNT Digital Library
ECRH in tandem mirror machines
The thermal barrier concept and the use of ECRH to generate the several electron populations required to establish confinement are discussed. Important physics issues related to the microwave heating are discussed. Fokker-Planck calculations which model the heating processes are presented, followed by recent experimental data on hot electron heating.
Date:
May 27, 1983
Creator:
Stallard, B.W.
Object Type:
Article
System:
The UNT Digital Library
News Journal & Derrick (Drumright, Okla.), Vol. 64, No. 20, Ed. 1 Wednesday, April 27, 1983
Weekly newspaper from Drumright and Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 27, 1983
Creator:
Hopper, Ellie
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Review of quantum Monte Carlo methods and results for Coulombic systems
The various Monte Carlo methods for calculating ground state energies are briefly reviewed. Then a summary of the charged systems that have been studied with Monte Carlo is given. These include the electron gas, small molecules, a metal slab and many-body hydrogen.
Date:
January 27, 1983
Creator:
Ceperley, D.
Object Type:
Article
System:
The UNT Digital Library
[News Clip: Dial-a-teacher]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
April 27, 1983, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Jackson]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 27, 1983, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Nude Texas]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
August 27, 1983, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Wright]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 27, 1983, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: DISD]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 27, 1983, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Cherokeean. (Rusk, Tex.), Vol. 133, No. 50, Ed. 1 Thursday, January 27, 1983
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
January 27, 1983
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Cherokeean. (Rusk, Tex.), Vol. 134, No. 37, Ed. 1 Thursday, October 27, 1983
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
October 27, 1983
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 8, Number 37, Pages 1721-1764, May 27, 1983
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
May 27, 1983
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History