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An error Analysis of R-C Timers

Description: 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.)
Item Type: Refine your search to only Report
open access

Path of Triple Point for spherical Shocks Above a Rigid Plane

Description: Paths of trip points of Mach reflections produced by 0.5-oz pentolite detonations have been observed for various burst heights. The slopes, Y, at points on the curved path are found to vary from values of Y predicted from plane shock wave data. This discrepancy is attributed to the shock strength conditions at the early inception of the Mach reflection, which later influence the triple point equilibrium, and in lesser degree to radius of curvature effects.
Date: July 13, 1954
Creator: Todd, Jay. Jr. & Schellenbaum, Ralph L.
Item Type: Refine your search to only Report
open access

Behavior of Transistors in a Magnetic Field

Description: 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.
Item Type: Refine your search to only Report
open access

The Shape of a Shock Wave Derived from a Spherical Shock Wave Incident on a Concave Wedge

Description: When a one-half ounce spherical charge of high explosive is detonated over a flat plane bounded by a 5 degree incline, the type of phenomenon encountered depends on the distance from ground zero to a beginning of the incline. If this distance is 48" the wave assumes a smooth contour on the plane. Detailed investigation of the shock velocity above the plane reveals that there is a pressure gradient along the shock front for a considerable region which replaces the usual triple point.
Date: July 7, 1954
Creator: Todd, Jay, Jr. & Schellenbaum, Ralph L.
Item Type: Refine your search to only Report
open access

Counting Room Equipment and Procedures and Sample Preparation

Description: The following are some of the equipment currently used in the Health Physics counting rooms at the Laboratory: scintillation counters, end window beta-gamma counters, precipitcon beta-gamma counter, autoscaler beta-gamma counter, and continuous flow proportional counter. This technical report describes the equipment, supporting equipment, procedures, and sample preparation in use at the Laboratory.
Date: May 1954
Creator: Weiss, M. M. & Marshall, J. B.
Item Type: Refine your search to only Report
open access

Low Speed Wind Tunnel Tests of Several Airfoil Sections Through 360 ° Angle of Attack

Description: A series of two-dimensional airfoils were run through a complete 360 ° angle of attack range to determine their low-speed force characteristics. The airfoils were chosen in an attempt to vary as many parameters (such as thickness, camber, thickness distribution, etc.) as possible with the limited number of shapes that time permitted. All airfoils tested had lift curves with two distinct stalls and quite similar drag curves between 0 ° and 90 ° angle of attack. The highly cambered sections devel… more
Date: October 14, 1954
Creator: Reed, James F.
Item Type: Refine your search to only Report
open access

A Comparison of the Neutron Yields from Low-Voltage Sources

Description: The description of the thick-target neutron yields from the D(t,n)He4 and the D(d,n)He3 reactions is calculated as a function of the energy of the bombarding particles. For 60-kev particles the ratio is 108. I increases to 168 at 100 Kev and to 194 for 120-kev particles. A qualitative discussion of the yields from various deuterium target leads to the conclusion that the greatest yield would come from the target which has the lowest stopping cross section per deuterium atom.
Date: October 6, 1954
Creator: Cooper, John N.
Item Type: Refine your search to only Report
open access

Second Report on Liquid Metal Level Instrument

Description: The liquid metal level instrument will operate at tank temperatures up to 1000 F. Overall system accuracy depends on operating conditions, as described in the report. Test accuracies from 2 to 8% have been obtained from full to empty tank. The primary detector unit successfully passed navy HI shock test.
Date: December 21, 1954
Creator: Droma, Clarence R.
Item Type: Refine your search to only Report
open access

Numerical Calculation of Blast Waves in Non-Uniform Atmosphere

Description: The problem of a blast wave propagating through an inhomogeneous atmosphere is set up for computation by the CRC LORA. Previous treatments of this problem have used various simplifying assumptions such as that of purely radial flow. Since, however, pressure gradients in this situation will not in general be in the direction of rays from the blast center, non-radial flow will exist, and there is reason to believe that for large distances this effect will play a prominent role. Therefore, a progr… more
Date: November 15, 1954
Creator: Fife, Paul C.
Item Type: Refine your search to only Report
open access

Pressurized Loop membrane Demineralizer Tests : Final Report [for] January-June 1953

Description: 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.
Item Type: Refine your search to only Report
open access

Rates of Convergence in Numerical Solution of the Diffusion Equation

Description: A basic technique in the design of a nuclear power reactor is to prescribe the dimensions and composition of a simplified model and to calculate the corresponding neutron flux and power distributions. Comparison of calculations for different models and of particular calculations to experimental results guides the physicist to a reasonable prescription. Until recently, the usual model had spherical or cylindrical symmetry. We have found it feasible to extend the methods to include a class of rea… more
Date: 1954
Creator: Stark, R. H.
Item Type: Refine your search to only Report
open access

Precise Closed-Form Solutions of Some Mixed Boundary Value Problems of Plane Elasticity

Description: Precise solutions are given for the problem of the semi-infinite strip extending from x=0 to x=infinity, stress-free along the edges y= +-1, when the edge x=0 is subject (a) to a quadratic sheer displacement and zero normal stress, (b) to a cubic normal displacement and zero sheer stress. These are the two simplest (non-trivial) end problems of the semi-infinite strip, antisymmetric in y, that may be formulated. The corresponding symmetric problems (a) linear seer displacement and zero normal s… more
Date: 1954
Creator: Horvay, Gabriel, 1908- & Born, J. B.
Item Type: Refine your search to only Report
open access

The Heat of Combustion of Calcium

Description: Calorimetric combustions of calcium metal were conducted at an initial temperate of 25 degree under an oxygen pressure of 50 atm. The energy of combustion under these conditions was to be 15,649 joules/g. The corresponding standard heat of formation of the oxide from the elements is calculated to be -628.63 +- 0.99 kjourles/mole. this value if 1.1% more positive than the previous accepted value.
Date: 1954
Creator: Huber, Elmer J., Jr & Holley, Charles E., Jr.
Item Type: Refine your search to only Report
open access

The Laplace Transform Method of Obtaining X-ray Spectral Energy Distributions

Description: This method essentially consists of analyzing x-ray filtration data in terms of Laplace transforms and obtaining the spectral energy distribution in terms of a sum of the corresponding inverse Laplace transforms. Some of the functions which are especially suited for this application are given and a graphical method of analyzing filtration data in terms of these functions is described. Examples of the practical application of this method to several low energy x-ray machines are included with a d… more
Date: November 20, 1954
Creator: Emigh, C. Robert
Item Type: Refine your search to only Report
open access

One Million Frame per Second Camera

Description: The design and construction of a 1,000,000 fps rotating mirror frame camera is described. Twenty five consecutive pictures 20 mm in diameter can be obtained on a strip of 35 mm film. A resolution of at least 20 lines/mm is obtained on a moderately fast film like Linagraph Shellburst. Accurate synchronization of the event to be photographed is required. The camera has been most useful in the investigation of explosive and related phenomena.
Date: 1954
Creator: Brixner, Berlyn
Item Type: Refine your search to only Report
open access

Mathematical Studies on Galvanic Corrosion. Part IV. Influence of Electrolyte Thickness on the Potential and Current Distributions over Coplanar Electrodes Using Polarization Parameters

Description: Extensive numerical evaluation was performed on a Fourier series derived for the potential distribution in an electrolyte lying above a plane containing infinitely long, narrow electrodes juxtaposed and arranged in an infinitely alternating array with even symmetry. In contrast to the previous studies in this series, the limitation that the electrolyte has finite depth was imposed. Four perspective drawings of the reduced potential function were made to scale to illustrate the potential variati… more
Date: 1954
Creator: Waber, James T. & Fagan, Bertha
Item Type: Refine your search to only Report
open access

The Spectrophotometric Determination of Dissociation Constants of Dibasic Acids. Methods Using a Minimum Amount of Data

Description: Two spectrophotometric methods are given for determining dissociation constants of dibasic acids. Each method is applicable for any degree of overlapping of the dissociation constants. Neither method requires a direct measurement of the extinction coefficient of any of the individual species that are in equilibrium with each other. A minimum amount of data is required in either method.
Date: January 1954
Creator: Thamer, Burton J.
Item Type: Refine your search to only Report
open access

Vapor and Liquid Phase Reactions Between Nitrogen Dioxide and Water

Description: Knowledge of the mechanisms involved in the aqueous absorption of nitrogen oxides is limited, and no definite evidence has been available to indicate if the major chemical reactions involved occur in the gas phase or in the liquid phase. This work was undertaken to determine in which phases the chemical reactions occur and to obtain additional information on the over-all mechanism of the removal process. The results of this investigation show that the rate of absorption of nitrogen oxides decre… more
Date: 1954
Creator: Peters, Max S., 1920-2011 & Holman, J. L. (James L.)
Item Type: Refine your search to only Report
open access

The Mass Spectra of Large Molecules. III, Metastable Ions from Propane and the Mass Spectrum of 2,2 Di-Deuteropropane

Description: There is at present a large collection of data giving the relative abundances of ions formed when molecules, especially hydrocarbons, are bombard with electrons and collected as positives ions in a mass spectrometer. This data per se gives us little insight into the kinetic processes occurring until it is combined with thermodynamic data and subject to a theoretical treatment based upon an assumed model for the kinetic processes taking place in the mass spectrometer. In accordance with our desi… more
Date: July 1954
Creator: Kropf, Allen; Wahrhaftig, Austin L. & Eyring, Henry, 1901-1981
Item Type: Refine your search to only Report
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