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Dynamic B and n-Behavior Up to 7600 Gauss in Magnet Model Mark Ii Comparison of Results With Long and Small Grad Coils
"Magnetic measurements were performance at excitation levels ranging from 4000 to 7600 gauss, to study the dynamic behavior of the magnetic and gradient lengths of the CEA magnet sectors. The influence of the proposed metal vacuum chamber on field and gradient was experimentally determined. Results of measurements made with a 26 in. long grad coil and with small circular grad coils are compared. The reliability of the 26 in. long grad coil is demonstrated."
Date:
August 13, 1957
Creator:
Henri, Victor Philippe & Nysater, H.
Object Type:
Report
System:
The UNT Digital Library
Vaporization Processes in a Runaway Reactor
From the point of view of constituents of a fuel element at temperatures between 2500 and 4500 degree K, the fuel elements can be considered to consist of six types of material: carbon, elements less volatile than carbon, 26 moles of rare gases, 21 moles of alkali metals, 17 moles of alkaline earth metals, and 4 moles of miscellaneous volatile elements. Various processes involving the constituents from 2000 to 45000 degree K are considered. Reactivity gain due to can rupture is discussed.
Date:
August 4, 1959
Creator:
Brewer, Leo, 1919-2005
Object Type:
Report
System:
The UNT Digital Library
Heat Transfer Fluids for Fuel Element Cans
The maximum temperature in the interior of the fuel element could be greatly reduced by incorporating a liquid between the fuel element and the outer can to increase-heat transfer rates. It is of interest to consider what liquids would be chemically compatible with graphite and the actinide carbides. Elements which melt below 1100 and boil above 1400 deg C that form no stable solid carbides, include Cu, Ga, TI, Ge, Sn, Pb, Sb, Bi, and compounds include GeP, GeS, GaP, Ga/sub 2/S, GaTe, GaAs, SnTe, Sm/sub 3/As/sub 2/, Sb/sub 3/Te/sub 2/, Zn/sub 3/Sb/sub 2/, Zn/sub 3/P/sub 2/, ZnS, ZnTe, and Zn/s ub 3/As/sub 2/. Some of these compounds have equilibrium pressures that might be considered too high, but they may actually vaporize slowly enough because of low vaporization coefficients to make them suitable. There are probably rot enough data nor adequate theories for predicting the rates, and Langmuir type vaporization experiments would be necessary to determine the rates of vaporization of these compounds. The main problem in the use of a heat transfer fluid is that of reaction between the fluid and the actinide carbides. Thermodynamically extensive attack would be expected. However, it may be possible to make the rate …
Date:
August 4, 1959
Creator:
Brewer, Leo, 1919-2005
Object Type:
Report
System:
The UNT Digital Library
Fate of Fission Product Gases in the Coolant Stream
The quantity and characteristics of fission products in coolant gases due to leaking fuel elements are discussed. It is concluded that the rare gases, the alkali metals, the halides, and Sb may act as permanent gases to a considerable extent. The other fission products are expected to condense out completely on walls or as dust consisting of metals, carbides, and oxides.
Date:
August 4, 1959
Creator:
Brewer, Leo, 1919-2005
Object Type:
Report
System:
The UNT Digital Library
Melting Point of Th-U-C Fuel Elements
From the point of view of predicting melting behavior of fuel elements containing fission products after 50 percent burn-up, the fuel can be considered to consist of 2000 moles Th, 150 moles U, 55 moles of rate earth metal, 31 moles of Zr, 25 moles of Mo, 20 moles of Rh-Ru-Tc, and 15 moles of alkaline earth metal. All other fission products are present in too small amounts to have any important effect upon the melting point or will have vaporized. However, the presence of alkali metal vapor should be considered.
Date:
August 3, 1959
Creator:
Brewer, Leo, 1919-2005
Object Type:
Report
System:
The UNT Digital Library
Technical Progress Report, University of Illinois, Graduate College, Digital Computer Laboratory, August 1959
This technical report covers five areas: (1) High-speed computer program; (2) Mathematical methods; (3) ILLIAC use and operations; (4) IBM 650 use and operation; (5) General laboratory information.
Date:
August 1959
Creator:
Taub, A. H., 1911-1999
Object Type:
Report
System:
The UNT Digital Library
An error Analysis of R-C Timers
The results of this paper show that a variation is sensing voltage produces an error in timing which increases logarithmically with time interval. Also, variation in supply voltage produces the same type of errors, but the errors are decreased by the ratio of the sensing to supply voltage. An interesting conclusion from this analysis is that if the ratio of supply to sensing voltages is maintained constant, no change in timing will result.
Date:
August 27, 1954
Creator:
Stromberg, R. P. (Robert P.)
Object Type:
Report
System:
The UNT Digital Library
Behavior of Transistors in a Magnetic Field
Experiments are described which show that magnetic fields can exert a controlling influence on the operating characteristics of point contact transistors. The effect is especially evident when the transistor is operated in its negative resistance region. The frequency of an oscillator can be varied, or a switch made to trigger by applying a magnetic field to the transistor. Some applications of the principle are suggested; many more are evident.
Date:
August 11, 1954
Creator:
Sander, Howard H.
Object Type:
Report
System:
The UNT Digital Library
A Discussion on the Layout of Elements of a Control Panel
This memorandum is an outline of the principles and methods employed by 5100 Human Engineering Personnel in consultation on test equipment panel layout. The process of control panel layout is partially formalized with particular emphasis on test equipment panels. An experimental method is proposed for selecting an optimum panel layout. The essential role of experimentation is pointed out. The optimal layout for a nonrepetitive procedure is deduced and generalized to give methods of layout solution for the general repetitive procedure.
Date:
August 1, 1955
Creator:
Beeler, J. R.
Object Type:
Report
System:
The UNT Digital Library
Vapor Traps for Handling Liquid Sodium
An active program is a present underway to develop equipment to handle liquid metals. Among the metals being studied are sodium and sodium--potassium alloy (the latter commonly referred to as NaK). In many of the systems being studied this liquid metal is pressurized by inert gas in the lines. At times it is necessary to bleed off some of this gas from the system. Although the gas is allowed to escape at a temperature at which the vapor pressure of sodium is extremely small, it has been found that excessive amounts of sodium are present in this gas stream. Either this sodium collects in the lead-off pipes from the system as a solid, threatening to block the passage in which it is found, or it passes out into the atmosphere. In order to explain the presence of such a dangerous concentration of sodium in the exit gas stream, it has been proposed that the sodium vapor present in the the system at high temperatures condenses into a mist or aerosol on cooling. This aerosol is stable and will not readily de-entrain or condense onto the surfaces over which it passes. Another possibility is that the oxygen present with the inert …
Date:
August 25, 1951
Creator:
Erickson, A. J.; Gregory, C. L. & Lang, P. M.
Object Type:
Report
System:
The UNT Digital Library
Progress Report No. 37 for the Period June 1, 1955 through August 31, 1955
This is the thirty-seventh progress report of the Laboratory for Nuclear Science at the Massachusetts Institute of Technology. Progress during the period of June 1, 1955 through August 31, 1955 is reported on: (1) Chemistry of the fission elements group, (2) Nuclear chemistry (inorganic) group, (3) Nuclear chemistry (organic) group, (4) Cosmic ray group, (5) Elementary particle scattering group, (6) neutron physics group, (7) ONR generator group, (8) Radioactivity group, (9) Cyclotron group, (10) Synchrotron group, (11) Theoretical group, (12) Personnel listing.
Date:
August 31, 1955
Creator:
{{{name}}}
Object Type:
Report
System:
The UNT Digital Library
Underground Movement of Radioactive Wastes
The theory and preliminary laboratory investigations presented in this technical report were intended to examine the general feasibility of injection disposal of radioactive wastes and to establish an understanding of the phenomena governing the travel of trace chemicals through natural porous media. Detailed studies of fluid velocity variations resulting from density differences between the injected and displaced liquids have been made. the ion exchange studies have been limited to strontium and calcium. Strontium 90 is considered to be the most hazardous of the fission products and should represent the radioisotope upon which to judge the merits of injection disposal. Consideration should also be given to cesium in evaluation the health hazards of injection disposal.
Date:
August 1, 1955
Creator:
Kaufman, Warren J., 1922-; Orcutt, Richard G., 1924- & Klein, Gerhard, 1918-1987
Object Type:
Report
System:
The UNT Digital Library
Crystal Structures and Atomic Volumes of the Elements
Data on the crystal structures of the common modifications of the elements at zero pressure.
Date:
August 12, 1955
Creator:
McMillan, W. G.
Object Type:
Report
System:
The UNT Digital Library
Photocathode and Reflector Effects n Relative Pulse Height Measurements
The first highly productive phase in the development of organic scintillation detectors found physicists exploring the excitation and light emission properties of easily available organic chemicals. The second phase of this work which is now in progress can be characterized by the active participation of organic chemists in synthesizing new compounds for sturdy and setting standards of purity leading to the recognition by some chemical manufactures of a "scintillation grade".
Date:
August 1954
Creator:
Hayes, F. Newton (Francis Newton), 1924- & Rogers, Betty S
Object Type:
Report
System:
The UNT Digital Library
The Development of Fixed Screen Resin-In-Pulp Devices
A resin-in-pulp process was developed using a series of fixed-screen or Winchester cells. Various laboratory and pilot plant models were constructed and tested under simulated plant conditions. The fixed-screen device proved very effective in the recovery of uranium and/or vanadium by a continuous, resin-in-pulp process.
Date:
August 5, 1954
Creator:
Charles, W. D.; Thorpe, D. F.; Lower, G. W.; Kaufman, David; Schiff, Norman N.; Abrams, Charles S. et al.
Object Type:
Report
System:
The UNT Digital Library
Recovery of Uranium From High Grade Australian Rum Jungle Uranium Ore
The leaching behavior, thickening and filtering characteristics and recovery of uranium from high grade uranium ore from Rum Jungle, Northern Territory, Australia are described.
Date:
August 22, 1952
Creator:
George, D'Arcy R.
Object Type:
Report
System:
The UNT Digital Library
Plate 1. Aeroradioactivity of East-Central New York and West-Central New England
Map with graded color shading to show levels of naturally-occurring gamma aeroradioactivity within the New England region of the U.S. Details about the survey and map creation are printed at right. Scale 1:250,000.
Date:
August 1962
Creator:
Popenoe, Peter
Object Type:
Map
System:
The UNT Digital Library
A Fast Neutron Time of Flight System for Use With Cyclotrons
"Time of flight spectrometers for the study of neutrons emitted in charged particle reactions have become important in recent years, following the development of suitable photomultiplier tubes and electronic circuits for nanosecond (ns) timing measurements. The principle of operation is simple. The particles exciting the nuclear reactions in which the neutrons are produced fall on the target in bunches of the order of a nanosecond in width. the arrival of product neutrons at a organic scintillation counter (proton recoil) detector placed a few meters from the target gives signals which can be used to determine the flight time of the neutrons from target to detector. A time-reference pule corresponding to the arrival of beam pulses at the target is required."
Date:
August 16, 1962
Creator:
Fulbright, H.W.; Verba, J. W.; Deshpande, V. K. & Hamann, A. K.
Object Type:
Report
System:
The UNT Digital Library
A Simplified Description of Spherical and Cylindrical Blast Waves
"Investigations into the behavior of the gas flow behind spherical or cylindrical blasts have shown that secondary shocks arise within the original detonation gases. The secondary shock, at first weak, is carried outward with the expanding gases. Subsequently it strengthens and bends back toward the origin, arriving there with high intensity. By using some recently developed techniques in shock dynamics a theory is developed by which the motion of the main shock wave, as well as the formation and subsequent motion of the secondary shock, are given by explicit formulae."
Date:
August 1, 1960
Creator:
Friedman, M. P.
Object Type:
Report
System:
The UNT Digital Library
Measurement of the Wolfenstein Parameter R at 210 Mev.
"Recent theoretical advances in describing the nucleon-nucleon interaction (particularly in the T=1 state) have emphasized the importance of obtaining an unambiguous experimental determination of the scattering matrix so that the nuclear phase shifts and details of the nuclear potential may be revealed. It is possible to select five experiments, the results of which, in principle at least, determine the scattering matrix and phase shifts uniquely at one energy. Two of these experiments, the cross section and polarization over the angular range of 0 to 90 degrees in the center of mass system, have been made at the University of Rochester at a laboratory energy of about 210 Nev."
Date:
August 1, 1960
Creator:
Gibson, W. A.; England, A. C. (Alan Coulter), 1932-; Heer, E. & Tinlot, J. H.
Object Type:
Report
System:
The UNT Digital Library
Precise Measurements of the Mean Lives of µ+ and µ- Mesons in Carbon
"The lifetimes of approximately 6 million positive mesons have been measured using a crystal controlled oscillator as a clock. The resulting decay curve was analyzed on the IBM 650 digital computer and gave a mean life of 2,211 plus or minus 0.003 µsec. The mean life of negative mu mesons in carbon was also measured and found to be 2,043 plus or minus 0.003 µsec. The resulting nuclear capture rate is (0.373 plus or minus 0.011)x10 to the 5th/sec, assuming that the decay rate of a negative mu meson bound in carbon is equal to the decay rate of the positive meson."
Date:
August 1960
Creator:
Reiter, Richard A.
Object Type:
Report
System:
The UNT Digital Library
Utilization of Radiactive Isotpoes in Coal Process Research
"This is the first quarterly report on Task II of the subject Utilization of Radioactive Isotopes in Coal Process Research. There were two separate projects on Tank I; I. methods Development for Tritium Labeling of Coal Product Hydro-carbons, and II. Applications of Radio-Tracer Techniques to the Study of Fluidized Particle Mechanics. The following extended work on Task II concerns only Methods Development of Radio-Tracing With Tritium."
Date:
August 15, 1960
Creator:
Yavorsky, P. M. & Gorin, E.
Object Type:
Report
System:
The UNT Digital Library
Visible Spectra of Some Metal Tris-Acetlacetonates
"The visible absorption spectra of VA3, CrA3, MnA3, FeA3 and CoA3 (A=C5H7O2, the acetylacetonate anion) are reported. The interpretation of the data in respect to the symmetry and strength of the ligand fields is discussed, with special attention to the presence and magnitudes of trigonal components in ligand fields and its consistency with certain results of paramagnetic trigonal fields of appreciable magnitude are present."
Date:
August 30, 1960
Creator:
Cotton, F. Albert (Frank Albert), 1930-2007 & Holm, Richard Hadley, 1934-
Object Type:
Report
System:
The UNT Digital Library
A Manual of Experiments in Reactor Physics
Nuclear processes are random in character, and, accordingly, are amenable to statistical treatment. In 1905, shortly after the discover of natural radioactivity, E. Von Schweldler showed that the analytical description of the decay distribution of radioactive substances followed from probability considerations regardless of the mechanism involved in the process of atomic disintegration.
Date:
August 1961
Creator:
Valente, Frank Anthony; Davidson, J. P. (John Pirnie), 1924-; Gisser, David G.; de Moraes, Octavio L.; Bryce, Donald H. & LoGuidice, Joseph M.
Object Type:
Report
System:
The UNT Digital Library