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Light Absorption and Scattering Mechanisms in Laser Fusion Plasmas
The picture of laser light absorption and scattering which is emerging from theory and computer simulation studies of laser-plasma interactions is described. On the subject of absorption, we discuss theoretical and experimental evidence that resonance absorption in a steepened density profile is a dominant absorption mechanism. Recent work also indicates the presence of critical surface ripples, which we study using two and three dimensional computer simulations. Predictions of hot electron spectra due to resonance absorption are described, as are effects of plasma outflow. We then discuss two regimes where stimulated scattering may occur. Brillouin scattering is expected in the underdense target blow-off, for long laser pulses, and is limited by ion heating. Raman scattering in the background gas of a reactor target chamber is predicted to be at most a 10 percent effect for 1 ..mu..m lasers.
Date:
October 4, 1977
Creator:
Barnes, C.; Estabrook, K. G.; Kruer, W. L.; Langdon, A. B.; Lasinski, B. F.; Max, C. E. et al.
Object Type:
Article
System:
The UNT Digital Library
Exploding pusher performance at fixed laser power, a theoretical model
A model for the physics of exploding pusher targets is presented which compares favorably with the predictions of the complex simulation code, LASNEX.
Date:
October 4, 1977
Creator:
Rosen, M.D. & Nuckolls, J.H.
Object Type:
Article
System:
The UNT Digital Library
Report of Group II-2: Running at ISA
A discussion is given of the anticipated operating conditions at the ISABELLE storage rings. Communications between experimental and control areas are considered, and beam luminosity monitoring is discussed. Running conditions and expected problems are outlined. (PMA)
Date:
August 4, 1977
Creator:
Chen, M.; Herrera, J. C.; Littenberg, L.; Thorndike, A.; Ogren, H.; Potter, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Simple scaling model for exploding pusher targets
A simple model has been developed which when normalized by experiment or Lasnex calculations can be used to scale neutron yields for variations in laser input power and pulse length and target radius and wall thickness. The model also illucidates some of the physical processes occurring in this regime of laser fusion experiments. Within certain limitations on incident intensity and target geometry, the model scales with experiments and calculations to within a factor of two over six decades in neutron yield.
Date:
November 4, 1977
Creator:
Storm, E. K.; Larsen, J. T.; Nuckolls, J. H.; Ahlstrom, H. G. & Manes, K. R.
Object Type:
Article
System:
The UNT Digital Library
Assessment of a small pressurized water reactor for industrial energy
An evaluation of several recent ERDA/ORNL sponsored studies on the application of a small, 365 MW(t) pressurized water reactor for industrial energy is presented. Preliminary studies have investigated technical and reliability requirements; costs for nuclear and fossil based steam were compared, including consideration of economic inflation and financing methods. For base-load industrial steam production, small reactors appear economically attractive relative to coal fired boilers that use coal priced at $30/ton.
Date:
October 4, 1977
Creator:
Klepper, O. H.; Fuller, L. C. & Myers, M. L.
Object Type:
Report
System:
The UNT Digital Library
Potassium vapor topping cycle. Technical progress report, April 1--June 30, 1977
The potassium vapor topping cycle is a concept for increasing the efficiency of the Rankine vapor cycle by raising the peak temperature by employing a potassium vapor cycle with a turbine inlet temperature of 1500 to 1600/sup 0/F (815 to 870/sup 0/C) in which the waste heat rejected from the condensing potassium vapor is transferred to boiling water and steam in a conventional steam cycle. An efficiency of about 50% is calculated for this cycle with a natural circulation potassium boiler fired by gas or oil. An Energy Research and Development Administration (ERDA) program is under way at Oak Ridge National Laboratory (ORNL) to build a full-scale potassium boiler tube bundle and burner module and test it with water and then potassium. Progress in this program is reported. The design work necessary for the installation of the potassium system was completed during the quarter. Fabrication of the potassium system components was finished. Installation of the condenser enclosure was completed and the drain tank was installed. Construction work on the equipment tower was completed.
Date:
October 4, 1977
Creator:
Holcomb, R. S.
Object Type:
Report
System:
The UNT Digital Library
Review of FFTF and CRBRP control rod systems designs
The evolution of the primary control rod system design for FFTF and CRBR, beginning with the initial choice of the basic concepts, is described. The significant component and systems tests are reviewed together with the test results which referenced the development of the CRBR primary control rod system design. Modifications to the concepts and detail designs of the FFTF control rod system were required principally to satisfy the requirements of CRBR, and at the same time incorporating design refinements shown desirable by the tests.
Date:
October 4, 1977
Creator:
Pitterle, T. A. & Lagally, H. O.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of regional effects of effluents from uranium production in New Mexico
The Grants Uranium Region is a 2500 mile area of northcentral New Mexico which has produced about 40 percent of all domestic uranium, and holds over one-half of the current reserves. The increasing demand for uranium to fuel commercial nuclear power plants is resulting in rapid growth of the uranium industry and economic, social, and environmental changes are occurring. One of the environmental issues of this region is the concern for eventually unacceptable levels of air and water pollution from effluents from uranium mill tailings piles. This study addresses these potential impacts in relation to industrial environmental control practices, siting features, and other regional/temporal variables, including rates of production, locations and sizes of new mills, and population distributions.
Date:
October 4, 1977
Creator:
Wilson, D.W.
Object Type:
Report
System:
The UNT Digital Library
Vacuum system for the Tandem Mirror Experiment
The Tandem Mirror Experiment (TMX) under construction at LLL is a Q-enhancement experiment using two mirror fields to ''plug'' a central solenoid field. Neutral beam injection supplies the energetic neutrals to the plug regions with attendant quantities of cold gas. The vacuum vessel consists of two large stainless steel tanks, which house the plug coils, joined by an aluminum central cell tank, which fits inside the existing solenoid coils from the 2XIIB experiment. The plug tanks are subdivided into regions for differential pumping of the source gas by liquid-nitrogen- or water-cooled liners. The liners are gettered by Ti--Ta wire sublimators of the 2XIIB type, using 2XIIB power supplies, to supply the necessary high-speed surface pumping. The roughing vacuum system consists of mercury vapor diffusion pumps backed by Roots-type blowers.
Date:
October 4, 1977
Creator:
Atkinson, D.P.; Calderon, M.O. & Nagel, R.J.
Object Type:
Article
System:
The UNT Digital Library
Pressure vessel fracture studies pertaining to a PWR LOCA-ECC thermal shock: experiments TSE-3 and TSE-4 and update of TSE-1 and TSE-2 analysis
The LOCA-ECC Thermal Shock Program was established to investigate the potential for flaw propagation in pressurized-water reactor (PWR) vessels during injection of emergency core coolant following a loss-of-coolant accident. Studies thus far have included fracture mechanics analyses of typical PWRs, the design and construction of a thermal shock test facility, determination of material properties for test specimens, and four thermal shock experiments with 0.53-m-OD (21-in.) by 0.15-m-wall (6-in.) cylindrical test specimens. In the first experiment, initiation was not expected and did not occur, although there was a small amount of subcritical crack growth. In the second experiment, initiation of a semicircular flaw took place as expected; the final length along the surface was about four times the initial length, but there was no radial growth. The third and fourth experiments were similar, and the long axial flaw initiated in good agreement with predictions.
Date:
November 4, 1977
Creator:
Cheverton, R.D. & Bolt, S.E.
Object Type:
Report
System:
The UNT Digital Library
Automated laser fusion target production concept
A target production concept is described for the production of multilayered cryogenic spherical inertial confinement fusion targets. The facility is to deliver targets to the reactor chamber at rates up to 10 per second and at costs consistent with economic production of power.
Date:
October 4, 1977
Creator:
Hendricks, C.D.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0098.0362]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
January 4, 1977
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0370]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Practicing for music festival competition at Enid, Chris Cochran steadies a sheet of music tacked to a tree as Donna Parker plays a flute."
Date:
May 4, 1977
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0699]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Playing to beat the band, left to right, Lisa Clements, Jay Silvernail and Cathy McMahan of Wakita get in some last minute practice on their instruments before competing in Tri-State events in Enid."
Date:
May 4, 1977
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0150.0857]
Photograph used for a story in the Oklahoma Times newspaper.
Date:
May 4, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0144.0212]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
May 4, 1977
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0172.0011]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "The city pound, located at Coffee Creek and Western roads, contains six cages for animals, is uncovered and often over-crowded, city animal control officials said."
Date:
January 4, 1977
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0158.0269]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "The sign at the site of construction work for the new 2.5 million gallon water storage tank at Del City tells what the purpose of the Public Works Employment Act of 1976 is all about -- jobs."
Date:
May 4, 1977
Creator:
Ward, Ron
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0144.0578]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "W. R. MacMillan, left, 3030 Hensley, and Gene Cotter, 3111 Hensley Drive, hold a sign painted in hopes of prodding the government to take action in their neighborhood."
Date:
May 4, 1977
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0021]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Spinning out on the next to the last lap is Tommy Coker, who was leading his super modified race before losing it in the turn during action Monday night at the Fairgrounds."
Date:
July 4, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0037]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Officers of the Cleveland County Junior Livestock Show Organization met recently to plan for the county Junior Livestock Show March 15-16-17."
Date:
March 4, 1977
Creator:
Rix, Jack
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0143.0452]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Grocer Delphin Coots says this letter from a woman offering to pay her 21-year-old bill with his store was "quite a surprise."
Date:
January 4, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0529]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Attorney Ken Coe examines the boxes of materials the Food and Drug Administration used in making the ruling Thursday that Laetrile is and should be illegal."
Date:
August 4, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[News Clip: Water Bills]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 4, 1977, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library