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High resolution x-ray crystal spectrographs
Observation of x-ray line emissions are valuable for determining the thermodynamic state of the emitting plasma. For laser produced plasmas, diffraction crystals can be used to isolate x-ray monochromes to obtain high resolution spectral measurements. We will describe a versatile multi-crystal high resolution spectrograph used for photon energies from 0.5 to 6 keV. We will discuss a calculational package that tunes the response and sensitivity of the instrument and estimates the effect of source extent on spectral resolution. A scheme using fine slits to obtain spatial resolution with the basic instrument will also be described. An instrument is being built for Shiva diagnostics that incorporates a diffraction crystal and an x-ray streak camera. The design rationale for the crystal stage will be discussed.
Date:
October 21, 1977
Creator:
Koppel, L. N. & Eckels, J. D.
Object Type:
Article
System:
The UNT Digital Library
Evaluation of the radionuclide concentrations in soil and plants from the 1975 terrestrial survey of Bikini and Eneu Islands
In June 1975 a radiological survey was conducted of the terrestrial environment of Bikini and Eneu islands (Bikini Atoll) to evaluate the potential radiation dose to the returning Bikini population. In this report, we present measurements of the radionuclide concentration in soil profiles and in dominant species of edible and nonedible, indicator plants. The use of these data to derive relationships to predict the plant uptake of radionuclides from soil is described. Approximately 620 soil and vegetation samples from Bikini and Eneu Islands were analyzed by Ge(Li) gamma spectrometry and by wet chemistry. The predominant radionuclides in these samples were /sup 60/Co, /sup 90/Sr, /sup 137/Cs, /sup 239,240/Pu, /sup 241/Pu, and /sup 241/Am.
Date:
January 21, 1977
Creator:
Colsher, C. S.; Robison, W. L. & Gudiksen, P. H.
Object Type:
Report
System:
The UNT Digital Library
PWR blowdown heat transfer separate-effects program data evaluation report: system response for thermal-hydraulic test facility test series 100
Selected reduced instrument responses and analyses of the indicated phenomena are presented for Thermal-Hydraulic Test Facility (THTF) test series 100, which is part of the PWR Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomena that govern the energy transfer and transport processes occurring during a postulated loss-of-coolant accident in a pressurized-water reactor system. Comparisons are made between the trends indicated by the reduced instrument responses and the thermal-hydraulic transient simulator RELAP4/MOD5 (update 2) to aid in understanding the phenomenological sequences. The results of verification studies of RELAP's performance in prediction of the THTF data are presented.
Date:
October 21, 1977
Creator:
Hedrick, R. A.; Craddick, W. G.; Turnage, K. G. & Hyman, C. R.
Object Type:
Report
System:
The UNT Digital Library
Chemistry research and development. Research and development semiannual progress report, January--June 1977
Results of investigations and developmental activities are reported in chemical research, component research, instrumental and statistical systems, pilot plant research, and process chemistry and instrumentation. (JRD)
Date:
October 21, 1977
Creator:
Miner, F. J.
Object Type:
Report
System:
The UNT Digital Library
2660 A holographic interferometry of laser produced plasmas from tilted disk targets
Using double exposure holographic interferometry, an investigation has been made of the Nd laser produced plasmas surrounding disk targets irradiated at different angles of incidence. Measurements have produced a detailed description of the plasma profile necessary for realistic simulations of resonance absorption. A 2660A 15 psec probe pulse is produced by frequency quadrupling a fraction of the main Nd laser pulse from the Janus laser. F/1 and f/10 lenses were utilized to irradiate the targets with intensities ranging from 10/sup 13/ w/cm/sup 2/ to 10/sup 16/ w/cm/sup 2/. Measurements have produced the shape of the electron density profile near critical, the direction of the plasma blowoff, and revealed transverse rippling of the isodensity surfaces.
Date:
October 21, 1977
Creator:
Auerbach, J.M.; Attwood, D.T.; Lee, P.H.Y. & Sweeney, D.W.
Object Type:
Article
System:
The UNT Digital Library
Fundamental study of crack initiation and propagation. [Computer model of ductile fracture]
Objective is to determine the fracture toughness of A533B-1 steel by computer modeling Charpy V-notch tests. A computer model of ductile fracture was developed that predicts fracture initiation. The model contains a set of material-dependent parameters obtained by computer simulations of small specimen tests. The computer calculations give detailed stress and strain histories up to the time of fracture, which are used to determine the model parameter values. The calibrated fracture model, that correctly predicts fracture initiation (and initiation energy) in the Charpy specimen, may then be used to simulate tests of accepted fracture-toughness specimens and hence obtain fracture toughness. The model parameters were calibrated to predict fracture in four different test specimens: two different notched-tension specimens, a simple tension specimen, and a precracked compact-tension specimen. The model was then used in a computer simulation of the Charpy V-notch specimen to initiate and advance a flat fracture. Results were compared with interrupted Charpy tests. Calibration of the model for two additional heat treatments of A533B-1 steel is in progress.
Date:
December 21, 1977
Creator:
Norris, D.M. Jr.; Reaugh, J.E.; Moran, B.; Quinones, D.F. & Wilkins, M.L.
Object Type:
Article
System:
The UNT Digital Library
Absolute instrumental neutron activation analysis at Lawrence Livermore Laboratory
The Environmental Science Division at Lawrence Livermore Laboratory has in use a system of absolute Instrumental Neutron Activation Analysis (INAA). Basically, absolute INAA is dependent upon the absolute measurement of the disintegration rates of the nuclides produced by neutron capture. From such disintegration rate data, the amount of the target element present in the irradiated sample is calculated by dividing the observed disintegration rate for each nuclide by the expected value for the disintegration rate per microgram of the target element that produced the nuclide. In absolute INAA, the expected value for disintegration rate per microgram is calculated from nuclear parameters and from measured values of both thermal and epithermal neutron fluxes which were present during irradiation. Absolute INAA does not depend on the concurrent irradiation of elemental standards but does depend on the values for thermal and epithermal neutron capture cross-sections for the target nuclides. A description of the analytical method is presented.
Date:
December 21, 1977
Creator:
Heft, R.E.
Object Type:
Article
System:
The UNT Digital Library
Sub-keV, subnanosecond measurements of x-ray spectra from laser-produced plasmas
As part of the effort to extend our x-ray diagnostic capabilities, we have made x-ray spectral measurements of laser-produced plasmas for photon energies down to 100 eV with a time response of 0.5 nsec. Fast, windowless x-ray diodes were used in conjunction with critical angle reflecting mirrors and thin filters for energy definition for two channels, 300 to 600 eV and 800 to 1300 eV. A third channel, using only an x-ray diode and filter, provided spectral information in the 100 to 300 eV region. Results from exploding pusher targets will be presented and compared with those of other diagnostic techniques and Lasnex calculations. Future expansion and modifications of the present system will be discussed.
Date:
October 21, 1977
Creator:
Kornblum, H. N.; Koppel, L. N.; Slivinsky, V. W.; Glaros, S. S.; Ahlstrom, H. G. & Larsen, J. T.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0051.1076]
Photograph taken for a story in the Oklahoma City Times newspaper. Caption: "Traffic officer J. D. Robertson surveys accident scene in the 400 block of SE 59 where two women were injured when their cars collided. Carolyn Jane Woods, 24, of 3020 SW 22, driver of the crushed compact car Robertson examines, is listed in stable condition at Hillcrest Hospital with head and internal injuries. Driver of the second car, Sun K. Badillo, 39, of 1301 SW 61, was treated at Hill crest and released."
Date:
September 21, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0110.0520]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Jannette Brown, Bartlesville golfer"
Date:
June 21, 1977
Creator:
Vahlberg, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0115.0406]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Mrs. Edwin Welch Burch Recently celebrated her 102nd birthday amid congratulations of family and friends."
Date:
November 21, 1977
Creator:
Vahlberg, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0091.0889]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "The delivery room at the Birth Center resembles a regular bedroom."
Date:
October 21, 1977
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0679]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Terry Collier lines up a putt during a first-round victory Wednesday over Dan Stout in the State Amateur."
Date:
June 21, 1977
Creator:
Vahlberg, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0547]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "John Croak, son of Mr. and Mrs. Robert Croak, 1012 Buckingham Place, Midwest City, takes a bumpy ride an electric car."
Date:
March 21, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0166.0523]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Mr. and Mrs. W. D. Dover say a nightly parade comes past their house to see the decorations, including "Santa's Workshop."
Date:
December 21, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0347]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "His young customers are still going happily about summer pursuits, but book work gas started for Dr. Dwayne Colvin, new assistant superintendent for curriculum and instruction in the Putnam City School system."
Date:
July 21, 1977
Creator:
Engh, Eric
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0716]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "That epitomizes the struggle of 39-year-old Joanna Clark, a transsexual whose sex change operation was one of about 50 performed by a team of physicians at Baptist Medical Center."
Date:
September 21, 1977
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0680]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
June 21, 1977
Creator:
Vahlberg, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0283]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "City crews work Saturday to clean out debris from Deep Fork Creek below a bridge south of NW 36 on Venice St."
Date:
May 21, 1977
Creator:
Reed, Monty
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0160]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Altus coach Darvis Cole, left, has put last season behind him and is ready to go after No. 1 this year."
Date:
July 21, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0143.0422]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Lou Anna Graham, 4, Gives Santa (M. Sgt. Vic Cooper. A kiss for Doll & Crib Gift While Helper Laura Cooper, 5, Assists."
Date:
December 21, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0134]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
January 21, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0675]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Their true identities unknown to each other, Michael Capes and Janice Coffman decide they could be happy together anyway in Lyric's production of "The Boyfriend."
Date:
June 21, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0346.0188]
Caption: "Judy Krieger helps the Bob Ford family clean up some personal items after Friday's tornado substantially damaged the Edmond residence."
Date:
May 21, 1977
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History