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Correlation of alluvial deposits at the Nevada Test Site

Description: Because characteristics of rock layers and problems in drilling must be studied before radioactive waste can be safely contained, an evaluation was made of methods for correlating alluvial deposits at Yucca Flat of the Nevada Test Site (NTS). Although correlation of Tertiary volcanic tuff beds at the NTS has been successfully achieved, correlation of stratigraphic zones in the overlying alluvium has posed technical difficulties. We have evaluated several methods for correlating alluvial deposit… more
Date: September 30, 1977
Creator: Grothaus, B. & Howard, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Picotron 100 streak tubes as a 150-channel photometer

Description: The characterization of a streak camera based upon Picotron 100 tube types is given. Both a large (30 cm 1 x 10 cm dia.) and a small (18 cm 1 x 5 cm dia.) version of this design has been tested. Over 150 channels of information are simultaneously time resolved with system S.N.R. of 3 at 100 picosecond time resolution without post intensification. Absolute photometric evaluation is given in the dynamic mode, i.e. while operating in the picosecond time domain. Such quantitative data has been lack… more
Date: January 1, 1982
Creator: Majumdar, S.; Weiss, P.B. & Black, J.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Validation and sensitivity of a simulated photograph technique for visibility modeling

Description: The Los Alamos Scientific Laboratory (LASL) visibility model is capable of producing simulated before and after pictures that illustrate visual effects of smoke plumes. Although the model has been under development for a few years, until recently there had been very little testing of the model against field experience or testing of sensitivity of the model results to numerical approximations used in the model. Further validation and sensitivity testing of the LASL model began in late 1979. The … more
Date: January 1, 1980
Creator: Williams, M.; Chan, L.Y. & Lewis, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Technique for dynamic range reduction for Landsat ratio images

Description: The LANDSAT ratio image, obtained by dividing one MSS band by another on a point-by-point basis, has become an established tool for geological applications over the past several years. Display of such images can be difficult since the dynamic range can extend from zero to infinity. A scheme for dynamic range reduction, based on a mathematical model of the multispectral image, is presented. It can be implemented on stand-alone digital image processing systems as well as general purpose computers… more
Date: January 1, 1978
Creator: Wecksung, G.W. & Breedlove, J.R. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Slit-mounted LED fiducial system for rotating mirror streak cameras

Description: We have developed a fiducial system for rotating mirror streak cameras that utilizes light emitting diodes mounted at the slit position of the camera. The diodes are driven to the required high brightness by a unique pulse power circuit designed to provide high voltage, high current pulses 18 nanoseconds in length at a frequency of up to 2.5 megahertz. The availability of super bright light emitting diodes with a wavelength of 630 to 640 nanometers allows us to record fiducial pulses, at streak… more
Date: January 1, 1991
Creator: Shaw, L.L.; Muelder, S.A. & Rivera, A.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design of neutron streak camera for fusion diagnostics

Description: The D-T burn time for advanced laser-fusion targets is calculated to be very short, < 50 ps. We describe the design of a neutron streak camera of 16 ps resolving time that can be used to study the temporal history of fusion burn. The cathode of the neutron streak camera is sensitive to neutrons and is curved such that the difference in the neutron path lengths from a point source to various parts of the cathode is compensated by electron transit times within the streak tube. Thus the cathode ca… more
Date: June 1, 1982
Creator: Wang, C. L.; Kalibjian, R. & Singh, M. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Automated computer analysis of plasma-streak traces from SCYLLAC

Description: An automated computer analysis technique that locates and references the approximate centroid of single- or dual-streak traces from the Los Alamos Scientific Laboratory SCYLLAC facility is described. The technique also determines the plasma-trace width over a limited self-adjusting region. The plasma traces are recorded with streak cameras on Polaroid film, then scanned and digitized for processing. The analysis technique uses scene segmentation to separate the plasma trace from a reference fid… more
Date: January 1, 1977
Creator: Whitman, R.L.; Jahoda, F.C. & Kruger, R.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Initial evaluation of photographic data of F- and H-Area seepage basin outcrops

Description: Photographic data for the Savannah River Plant (SRP) were reviewed for 1961 through 1987 to determine the value of this photography in estimating the timing and extent of the F- and H-Area seepage basin outcrops along the upper Four Mile Creek floodplain. In excess of 15,000 frames of photography of the SRP were reviewed. The quality of the photography varied widely and included panchromatic (black and white), natural color, and false color infrared. Altitudes of the photography ranged from 2,0… more
Date: February 8, 1988
Creator: Mackey, H. E., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ultrafast gated intensifier design for laser fusion x-ray framing applications

Description: A major challenge for laser fusion is the study of the symmetry and the hydrodynamic stability of imploding fuel capsules. Streaked x-radiography, in one space and one time dimension, does not provide sufficient information. Two (spatial) dimensional frames of 10 to 100 ps duration are required with good image quality, minimum geometrical distortion (approximately 1%), dynamic range greater than 1000 and greater than 200 x 200 pixels. A gated transmission line imager (TLI) can meet these requir… more
Date: November 1, 1983
Creator: Price, R.H.; Wiedwald, J.D.; Kalibjian, R.; Thomas, S.W. & Cook, W.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Telescopic zoom lens attachment for magnified views in underwater radiation environments

Description: This document consists of the notes that accompany a slide presentation (15 slides). The discussion begins with the need for the Telescopic Zoom Lens or TZL; why is was designed and fabricated as well as the design restraints that dictated its final form and function. Next is the use and modification of existing equipment; equipment that was used to remotely scan a nuclear reactor tank using eddy current and ultrasound. The uniqueness of the TZL mechanism itself is discussed; how it meets the d… more
Date: January 1, 1991
Creator: Appel, D.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of cesium iodide and gold photocathodes for x-ray streak cameras

Description: X-ray streak cameras at Lawrence Livermore Laboratory use gold transmission photocathodes for x-ray detection. Other photocathode materials which might provide improved sensitivity without loss of temporal resolution are of interest. Of particular interest are dielectrics such as cesium iodide. Simultaneous measurements of the sensitivity to 500 eV x-rays of both gold and cesium iodide photocathodes in the LLL Soft X-ray Streak Camera were made. Enhanced sensitivity with the Csl photocathodes i… more
Date: January 1, 1979
Creator: Stradling, G.L.; Medecki, H.; Attwood, D.T.; Kauffman, R.L. & Henke, B.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Diagnostics of inertial confinement fusion experiments

Description: The requirements of plasma temperature and particle energies are effectively the same for inertial confinement fusion, ICF, and magnetic containment fusion, MCF. The n/tau product must also be similar; however, in ICF we increase the density to achieve efficient fuel burn up. Reactor gain pellets are expected to require densities of up to 10/sup 4/ x liquid density of DT. This corresponds to n approximately 10/sup 26/ cm-/sup 3/. The dimensions of the compressed core are of the order of microns… more
Date: August 1, 1977
Creator: Ahlstrom, H.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Automated computer analysis of plasma-streak traces from SCYLLAC

Description: An automated computer analysis technique that locates and references the approximate centroid of single- or dual-streak traces from the Los Alamos Scientific Laboratory SCYLLAC facility is described. The technique also determines the plasma-trace width over a limited self-adjusting region. The plasma traces are recorded with streak cameras on Polaroid film, then scanned and digitized for processing. The analysis technique uses scene segmentation to separate the plasma trace from a reference fid… more
Date: November 1, 1977
Creator: Whiteman, R. L.; Jahoda, F. C. & Kruger, R. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Search for faint galactic features

Description: Trying to determine the size of galaxies and looking for tails and connections between galaxies can be intriguing. These very faint features are often buried in the film grain noise. Our study is of the NGC 3623, NGC 3627 and NGC 3628 region. The search for these faint features is complicated by film variation, sky background, microdensitometer drift and stars in the neighborhood of the galaxies. These questions are addressed and faint features are found with the use of judicious data stretchin… more
Date: January 1, 1980
Creator: Matuska, W. & Burkhead, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Silver recovery system data

Description: In August of 1990 the Savannah River Site Photography Group began testing on a different type of silver recovery system. This paper describes the baseline study and the different phases of installation and testing of the system.
Date: August 26, 1991
Creator: Boulineau, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recent Developments in Microshell-Tipped Optical Fibers as High-Pressure Shock Detectors

Description: We describe ongoing development and characterization of Microshell-tipped optical fibers used as impact sensors. We observed a risetime of 15 ns when the probe is used to measure a detonation wave in PETN. We report successful development of two nondestructive tests, radiography and fluorescence, to check the integrity of the sensor. The sensor is now commercially available. 5 refs., 3 figs.
Date: January 1, 1985
Creator: Mayer, F. J.; Maynard, R. L.; Musinski, D. L.; Schmerberg, N. W.; Wixom, M. R. & Benjamin, R. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Diagnostics of the Los Alamos free-electron laser using streak systems

Description: The applications of ''streak systems'' that provide time-resolved diagnostic data for the Los Alamos free-electron laser energy recovery experiments have been extended in the last year. We have used these systems with time resolutions of 10 ..mu..s, approx.20 ps, and 2 to 8 ps to address both macropulse and micropulse issues. As one example, the time-dependent extraction efficiency behavior during the macropulse is presented. In addition, the effects on the electron micropulse temporal shape of… more
Date: January 1, 1986
Creator: Lumpkin, A. H. & Feldman, D. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Phase distribution measurements in narrow rectangular channels using image-processing techniques

Description: Phase distribution of air-water flow in a narrow rectangular channel is examined using image-processing techniques. Ink is added to the water, and clear channel walls were used to allow high-speed, still photographs and video tape to be taken of the air-water flow field. Flow field images are digitized and stored in a Macintosh IIci computer using a frame grabber board. Local grey levels are related to liquid thickness in the flow channel using a calibration fixture. Image-processing shareware … more
Date: June 1, 1992
Creator: Bentley, C. L. & Ruggles, A. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Visibility issue in the Rocky Mountain West. [Relation to energy facility siting]

Description: Clear, clean air is one of the natural resources of the Rocky Mountain West. The visibility provisions of the Clean Air Act of 1977 were intended to protect this natural resource in certain Federal class I areas, for example, national parks and wilderness areas. There are a number of potential issues which arise due to the possible reduction of visibility caused by emissions from energy facilities. A number of these issues are briefly discussed. The issues are highlighted by computer generated … more
Date: January 1, 1977
Creator: Leonard, E. M.; Williams, M. D. & Mutschlecner, J. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Stress-Relief Displacements Induced by Drilling--Applications to Holographic Measurements of in Situ Stress

Description: The holographic stressmeter is an instrument which has been developed at Caltech to allow determination of the complete stress tensor from in situ borehole measurements. The stressmeter uses double-exposure holographic interferometry to record the displacements induced by the drilling of a small sidehole into the borehole wall. The local stresses, which are the result of the far-field stresses, concentrated at the borehole, cause deformation of the surface of the borehole wall in the vicinity o… more
Date: April 24, 1992
Creator: Ahrens, T. J. & Smither, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Combustion-turbulence interaction in the turbulent boundary layer over a hot surface

Description: The turbulence-combustion interaction in a reacting turbulent boundary layer over a heated flat plate was studied. Ethylene/air mixture with equivalence ratio of 0.35 was used. The free stream velocity was 10.5 m/s and the wall temperature was 1250/sup 0/K. Combustion structures visualization was provided by high-speed schlieren photographs. Fluid density statistics were deduced from Rayleigh scattering intensity measurements. A single-component laser Doppler velocimetry system was used to obta… more
Date: January 1, 1982
Creator: Ng, T.T.; Cheng, R.K.; Robben, F. & Talbot, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Circulation and coalescence within a vaporizing emulsified fuel droplet

Description: A droplet of emulsified fuel (hexadecane, with 30% dispersed water and 2% surfactant) was supported by a vapor film between the droplet and a polished hot surface. Overlighting with a laser was used. During vaporization of approx. 2000 ..mu..m droplet, rapid internal circulation caused coalescence of the dispersed water droplets. Convective velocities are 0.2 to 0.5 m/s. During circulation, these droplets move directly along the fuel surface and are not preferentially distilled from the droplet… more
Date: January 1, 1980
Creator: Baer, M.R.; Sheffield, S.A. & Denison, G.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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