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Radiation Damage to Vacuum Chamber Walls
"The problem of radiation derange to the walls of two types of vacuum chamber for the 6 Bev Cambridge Electron Accelerator was studied. Radiation damage may arise from the synchrotron radiation and from electrons which are not accepted at injection. The synchrotron radiation produces a large amount of secondary x radiation which is isotropic, and therefore complicates the arrangement of internal shielding. The 20 Mev electrons from the lines cannot be attenuated by shielding. It is concluded that dosages of the order of 10/sup 7/ rad/day near the inflector are unavoidable. This would exceed the allowable dosage for a tube made by cementing a stainless steel liner to supporting ribs, and also exceed the test dosages (so far as we know) for alumina ceramics."
Date:
September 10, 1957
Creator:
Stearns, Brenton
Object Type:
Report
System:
The UNT Digital Library
University of Illinois, Graduate College, Digital Computer Laboratory, Technical Progress Report
The report includes summary reports in five areas (1) High-speed computer program, (2) Mathematical methods, (3) ILLIAC use and operations, (4) IBM 650 use and operation, and (5) General laboratory information.
Date:
September 1959
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Behavior of Bond Under Dynamic Loading
The objectives of this research program are to determine bond strength under dynamic loading, to compare bond strengths under static and dynamic loading, and to test the adequacy of ACI Building Code bond requirements for structural elements subjected to blast loads. The tests have shown that local static bond strengths may be as high as 0.75 fc and that under dynamic loading this strength increases to fc. For all practical lengths of embedment of bars, steel failure is to be expected both under static and dynamic loading. Such bars loaded dynamically will carry a larger load than bards loaded statically, this increase in load carrying capacity of bars being sole due to the increase of steel strength under dynamic loading.
Date:
September 1959
Creator:
Liepins, A. A. (Artis A.)
Object Type:
Report
System:
The UNT Digital Library
A Preliminary Study of the Potential to Kinetic Energy Conversion Process in the Stratosphere
The potential to kinetic energy conversion process in the lower stratosphere is evaluated using adiabatically derived vertical velocities for the North American region for a five-day period. Preliminary results suggest the possibility that on the average the kinetic energy of stratospheric motions may not result from a conversion of potential energy within the stratosphere. The further implication is that stratospheric motions are mechanically driven by the motions in the adjacent layers of the atmosphere.
Date:
September 15, 1959
Creator:
White, Robert M., 1923-2015 & Nolan, George F.
Object Type:
Report
System:
The UNT Digital Library
Ideal Gas Thermodynamic Properties of Detonation Products
The ideal gas thermodynamic functions were computed at various temperatures in the temperature range from 300 degree to 6000 degree Kelvin for some of the molecular species of interest in detonation performance calculations. The molecular species are composed of the atoms chosen from among the following: Al, B, Be, C, Cl, F, H, Li, Mg, N, and O. The method of least squares was used to determine the parameters of a cubic equation which expresses the dependence of these thermodynamic functions on temperature.
Date:
September 1959
Creator:
Mader, Charles L.
Object Type:
Report
System:
The UNT Digital Library
Practical Methods for the Reduction of Strain Gage Data
The error that results when it is attempted to evaluate stress from a reading taken on a single element SR-4 strain gage in a biaxial stress field is discussed. A method is presented for relating SR-4 rosette strain gage readings directly to the biaxial stress state without the necessity of first converting strain gage readings to true strains. Correction formulas are presented for use when single element SR-4 gages are used as rosette elements or as stress gages.
Date:
September 7, 1955
Creator:
Dove, Richard C.
Object Type:
Report
System:
The UNT Digital Library
Note on the Numerical Evaluation of Integrals of the Form anti l*SUB infinity/*SUP infinity/ f(x) *phi/(x) dx, with Particular Reference to the Determination of the Expectation of a Function of a Normally Distributed Random Variable
This note is concerned with the numerical integration of the integrals of the form anti l*SUB infinity/*SUP infinity/ f(x) *phi/(x) dx is "smooth."
Date:
September 1, 1953
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Research on Uranium-Base Alloys. Part I, Transformation Kinetics of Uranium-Base Alloys, Final Report, November 15, 1952 - August 31, 1955
Information concerning the transformation kinetics of the gamma solid solution of uranium-base alloys is important. Accordingly, the metastability of the gamma phase was investigated for nine uranium-rich alloys of the U-Mo-Pt, U-Mo-Nb, and U-Nb systems. Samples were encapsulated in Vycor bulbs, solutions treated at 1000 decrees or 1050 degrees C, quenched to and annealed at temperatures between 600 degrees and 300 degrees C. Techniques employed to follow transformation included metallography, resistivity, X-ray diffraction and hardness. A difference exists between the TTT curves for the same alloy determined by different techniques. However, this is readily explained. The body-centered cubic gamma phase of the U-Mo and U-Mo-X alloys decomposes eutectoidally to form alpha and epsilon, an ordered structure. The eutectoid temperate is about 575 degrees C in the binary system. In the U-Nb system the gamma solid solution decomposes monometrically (or eutectoidally) to a product of alpha and another niobium-rich gamma phase. Alpha uranium has characteristic low solubility for either of the alloy components. The nose of the TTT curves for the U-5.1 wt % Mo and U-10 wt % Nb compositions exists at about 550 degrees C and 0.1 hour. Minimum times for transformation are longer for the other alloys. Rather …
Date:
September 30, 1955
Creator:
Van Thyne, R. J. & McPherson, F. J.
Object Type:
Report
System:
The UNT Digital Library
Pressurized Loop membrane Demineralizer Tests : Final Report [for] January-June 1953
A membrane demineralizer has been tested in a pressurized loop. The loop water resistivity was maintained in the 1-2 megohm range by ionized solid transfer in the demineralizer. The size and power requirement of the unit tested per gpm flow through the unit, were 2.3 cu ft and 100 watts. In view of the fact that present designed could reduce the size and required maintenance, further studies may be warranted.
Date:
September 15, 1954
Creator:
Rosenberg, N. W.
Object Type:
Report
System:
The UNT Digital Library
Occurrence of Technetium in Nature : Final Report for the Period November 1, 1954 to August 31, 1955
Twelve neutron activation analyses for naturally occurring technetium-98 were performed. Positive results were obtained in ten cases. Precautions were taken to avoid interference by molybdenum and technetium-99. the cross section for the reaction [formula] as found to be equal to 4 +- 2 mb for the neutron spectrum of the vertical thimbles of the Argonne CP-5 reactor. The chemical state of molybdenum (VI) in basic solution was studied by an anion-exchange technique. Evidence was obtained for the existence of polymeric species at pH-values up to 14. Preliminary work on the stability of Domax-1 anion exchange resin in perchlorate media indicates rapid deterioration even at 0.2F ClO4-.
Date:
September 1, 1955
Creator:
Anders, Edward, 1926-
Object Type:
Report
System:
The UNT Digital Library
A Cloud Chamber Study of the Secondary Particles from Locally Produced Penetrating Showers
The present experiment was undertaken as an attempt to throw more light on the decay processes that had been observed prior to the summer of 1952, as well as to investigate any new decay processes that might manifest themselves. The source of high energy primary particles was to be the cosmic ray beam, so a detector of locally produced high energy penetration showers was used. In order to be able to detect effectively low energy photons and low energy secondaries from particles reaching the end of their range in the chamber, thin lead plates (1/4") were used in the chamber.
Date:
September 1955
Creator:
Harmon, Norman Frederick
Object Type:
Report
System:
The UNT Digital Library
The Grüneisen Parameter for an Einstein Solid and Under Finite Strain
The Grüneisen constant, as evaluated from the equation of state, is obtained for an Einstein solid. the presence of a state of finite hydrostatic pressure is taken into account explicitly by means of Murnaghan's theory of finite strain, to obtain the Grüneisen parameter's on the Debye and Einstein models. Results are identical in the two cases with the corresponding values obtained without use of the formal theory of finite strain.
Date:
September 26, 1955
Creator:
Gilvarry, J. J. (John James), 1917-
Object Type:
Report
System:
The UNT Digital Library
Semi-Annual Progress Report, September 30, 1955
Progress is reported in studies on (1) injection tables, (2) radon escape from bone containing radium, (3) on the question of th228 translocation in Ra228 dogs, (4) further studies on the metabolism of Th228 and its daughters, (5) veterinary group report, (6) hematology observations, (7) biochemistry, (8) pathology and detailed radioautography report, (9) radioautographic studies of Pu and RdTh teeth, (10) effect of parathormone on the deposition of Pu in rats, (11) speculation on the toxicity of RdTh and MeTh relative to radium, (12) autoradiographic and histopathologic studies of beagle puppies administered intravenously with Sr90, (13) plasma Fe study, and (14) Cr51 tagging RBC study.
Date:
September 30, 1955
Creator:
University of Utah. Radiobiology Laboratory
Object Type:
Report
System:
The UNT Digital Library
An Investigation of Scaling of Zirconium at Elevated Temperatures Quarterly Status Report no. 9.June 2, 1955 to Sept. 2, 1955
To obtain a better understanding of the mechanism involved in scaling behavior of zirconium, kinetic studies were made of the weight pickup in air after the following pretreatments; (1) exposure to oxygen or nitrogen, (2) exposure to air, oxygen or nitrogen and removal of the resulting surface compounds.
Date:
September 6, 1955
Creator:
Green, H. M.; Tuchschmid, Heinrich Eugen, 1922- & Baldwin, W. M., Jr.
Object Type:
Report
System:
The UNT Digital Library
Leaching and Precipitation Tests on Grants Ores
Leaching tests were run on two samples from the Grants area in New Mexico. Uranium extractions of 94 per cent were obtained by leaching Sample 6-1 with solutions containing 240 lbs. of Na2CO3 and 60 lbs. of NaHCO3 per ton and by leaching Sample 6-2 with 270 lbs. of Na2CO3 and 180 lbs. of NaHCO3 per ton. Cyclic tests were completed using caustic precipitation of the leach liquor.
Date:
September 10, 1951
Creator:
Abrams, Charles S. & George, D'Arcy R.
Object Type:
Report
System:
The UNT Digital Library
PM-3A Nuclear Power Plant Secondary Shield Design
"The design, analysis, and selection of system components for functions related to secondary shielding and associated auxiliary systems for the Antarctic PM-3A Nuclear Power Plant are described. Backfill material characteristics, shielding and activation analyses, heat transfer analysis, backfill cooling system, water exclusion and removal system, and instrumentation and control are discussed."
Date:
September 1961
Creator:
Siler, W C
Object Type:
Report
System:
The UNT Digital Library
Stratospheric Monitoring Program
"The performance of the Model I electrostatic precipitator sampler in recent field and laboratory tests is described and discussed. Two of the four precipitator-bearing balloon flights during this interval reached the floating altitude of approximates 105,000 feet, and the precipitator operated efficiently on both. One sample was collected at the nominal design flowrate of approximates 100 cfm, and the second at approximates -200 cfm. Comparison of the deposition profiles of the stratospheric samples with those obtained under controlled conditions in the altitude chamber indicates that the field samples were collected with >90% efficiency. The laboratory tests also showed that the performance capability of the precipitator improves with increasing precipitator current, and with increasing altitude. One of the above balloon flights carried two Model A-I altimeters with recorder outputs. The two records were identical within plus or minus 250 feet. In addition, variations in altitude indications were consistent with the less sensitive aneroid barocoder measurements from the same flight. A revised Model A-I altimeter with a telemeterable output signal has been designed and constructed. The frequency of the signal is a function of the altitude. A preliminary design concept for a flowmeter with negligible flow resistance is described. It would utilize …
Date:
September 18, 1963
Creator:
Cravitt, S.; Lippmann, M.; Lilienfeld, P. & Viggiano, J.
Object Type:
Report
System:
The UNT Digital Library
Interpretation of Westwood, New Jersey Rainfall Data
"Progress is reported in an evaluation of fission product concentration in rain as a function of time, location, and meteorological setting. Data on rainfall collected at Westwood, N. J., were analyzed for information on the mechanisms of fallout deposition, seasonal variations in fallout, the stratospheric residence time of W/sup 185/ resulting from Operation Hardtack, and the accuracy of pot samplers for sample collection. Data from other collection stations were also analyzed for consistency with Westwood data."
Date:
September 15, 1959
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Annual Progress Report of Methods to Increase Burnout Heat Transfer
"Acoustic energy generated by mechanical or electrical signals and its effect on pool boiling of isopropanol were studied. Daring the course of the investigation, a method was devised to determine the amount of heat-transfer surface wetted by the boiling isopropanol. Plots of heat flux versus temperature difference for each frequency showed that the acoustic energy did not significantly affect the heat flux at burnout, but slightly increased the critical temperature difference. No general effect of frequency variation was found even at the frequencies of the "boiling songs" of isopropanol. The over- all effect of the acoustic energy was to disturb the vapor tending te coat the heat transfer surface. This was most evident from the absence of film boiling even at temperature differences far above the critical temperature difference. The application of alternating current to the boiling system gives promise of a self-regulating method to increase boiling heat transfer when required, and is the most significant new finding of this investigation. Two pertinent Russian papers were translated and are appended."
Date:
September 30, 1960
Creator:
Markels, Michael; Durfee, Robert L. & Richardson, Robert
Object Type:
Report
System:
The UNT Digital Library
Comparison of Radiation-Induced Graft Copolymerization Untilizing Electron Accelerators and Isotope Sources as Radiation Initiators
"A comparison of grafting to two thicknesses of polypropylene film is made using isotope and electron accelerator initiation. The results indicate that the grafting of methacrylic acid: styrene to polypropylene is mainly a surface reaction."
Date:
September 12, 1961
Creator:
Odian, George; Oliver, William F. & Pierre, Karl
Object Type:
Report
System:
The UNT Digital Library
Nuclear Track Image Intensifier
"Development of a nuclear track image intensifier which is to have a cathode dia. of 83 in. and an output screen dia. of 1 in. is reported. Spherical faceplates for the intensifier which were etched to a thickness of 0.025 in. over a dia. of 80 in. withstood a pressure differential of 2 atm. Techniques were developed to measure spectral energy distribution, phosphor burn characteristics, phosphor efficiency, and phosphor persistence. Thallium- activated RbI and CsI were evaluated for use in the first stage of the image intensifier system. A color shift toward the yellow was accomplished in rubidium iodide phosphor by increasing the mole % of Th activator. Burn varied widely in different samples."
Date:
September 30, 1960
Creator:
DesRochers, R. D.; Stern, H. A. & Ezard, L. A.
Object Type:
Report
System:
The UNT Digital Library
Thermonuclear Plasma Containment in Open-Ended Systems
"A survey is presented of the theory of confinement in open-ended systems (such as mirror machines and cusped geometries) together with the slight amount of experimental confrontation with theory that exists at present."
Date:
September 30, 1960
Creator:
Grad, Harold, 1923-
Object Type:
Report
System:
The UNT Digital Library
Equilibrium Configuration of a Plasma in the Guiding Center Limit
"We compute the equilibrium configuration of a collision-free plasma contained in an axially symmetric magnetic field. The plasma is characterized by a non-scalar pressure tensor which is obtained from a microscopic distribution function in a form suggested b the guiding center approximation. The solution is calculated in the limit where the ratio of the width to the length of the plasma region and the ratio of the gas to the magnetic pressure are both small. Boundary values at the midplane as well as the shape of the plasma appear as arbitrary parameters in the solution. We give the solution to a corresponding scalar pressure problem for comparison."
Date:
September 15, 1960
Creator:
Oppenheim, Alan
Object Type:
Report
System:
The UNT Digital Library
Diffraction of Hydromagnetic Wave by a Half Plane
"In this paper we solve for the diffracted wave which results when a weak hydromegnetic shock impinges on a rigid perfectly conducting half plans."
Date:
September 30, 1960
Creator:
Gardner, Clifford S.
Object Type:
Report
System:
The UNT Digital Library