Angular Distribution of 30.6 Mev Protons Elastically Scattered by Be, C, and Al (open access)

Angular Distribution of 30.6 Mev Protons Elastically Scattered by Be, C, and Al

The motivation for the measurement of the angular distribution of elastic scattering of medium energy protons and neutrons has been clearly presented by others. They have also listed the results obtained prior to their experiments at 31.5 Mev. This is a report on some results obtained with 30.6 Mev protons scattered from Be, C, and Al.
Date: November 1953
Creator: Wright, Byron T.
Object Type: Report
System: The UNT Digital Library
Medical and Health Physics Quarterly Report July, August, September, 1953 (open access)

Medical and Health Physics Quarterly Report July, August, September, 1953

Quarterly report on the metabolic properties of various materials, biological studies of radiation effects, health chemistry, health physics.
Date: November 27, 1953
Creator: University of California Radiation Laboratory
Object Type: Report
System: The UNT Digital Library
UCRL Lectures on Numerical Analysis and Applied Mathematics: Lecture IX (open access)

UCRL Lectures on Numerical Analysis and Applied Mathematics: Lecture IX

The field of mathematics which deals with the construction of charts representing mathematical laws is known as Nomography. Often it is necessary to repeatedly solve mathematical formulae, but with different values for the symbols involved. The manipulation of the formulae, or repeated constructions of graphs, may require considerable work, as well as carry with it the possibility of errors invalidating the results. In such a situation, the construction of a single chart which would serve for all the solutions would obviously be of considerable value.
Date: November 18, 1952
Creator: Robbins, Edward S.
Object Type: Report
System: The UNT Digital Library
MTA, A-12 Development, Drift Tubes - RF and Beam Geometry. Comparison of A-12 to A-24 (open access)

MTA, A-12 Development, Drift Tubes - RF and Beam Geometry. Comparison of A-12 to A-24

The final r.f. characteristics of A-12 are shown. The mechanical features are available in UCRL-1859. If A-12 were to be changed to 24.2 mm rather than 12.1 mm, keeping the same length and the same constant average coil gradient of 0.375 MV/ft., the characteristics of such an A-24 can be obtained from the attached curves.
Date: November 17, 1952
Creator: Schelberg, A. & Kitchen, S.
Object Type: Report
System: The UNT Digital Library
Medical and Health Physics Quarterly Report - July, August, and September, 1952 (open access)

Medical and Health Physics Quarterly Report - July, August, and September, 1952

Reports on the biological studies of radiation effects, the metabolic properties of various materials, health physics and chemistry.
Date: November 10, 1952
Creator: University of California Radiation Laboratory
Object Type: Report
System: The UNT Digital Library
Neutron Dosimetry in and Around Human Phantoms By Use of Nuclear Track Emulsion (open access)

Neutron Dosimetry in and Around Human Phantoms By Use of Nuclear Track Emulsion

The power of nuclear track research emulsion as a fast neutron dosimeter is examined in the exposure of a human phantom to PuBe neutrons. Semiautomatic track scanning and high-speed data analysis obviate the major disadvantages of this dosimeter, and allow the following basic information to be obtained without a serious cost in time: the rulative proton recoil energy spectrum, the absolute differential proton track den sity spectrum, and the average proton recoil energy at various locations in the phantom. From this are calculated the total absorbed local tissue doze due is proton recoils, the local thermal neutron intensity, and that portion of the tissue doze due to thermal [formula] tracks.
Date: November 30, 1961
Creator: Akagi, Hiroaki & Lehman, Richard L.
Object Type: Report
System: The UNT Digital Library
Data Processing For Bubble Chambers (open access)

Data Processing For Bubble Chambers

The computer program which performs spatial reconstruction of events photographed in a bubble chamber is required to eliminate human and digitizer errors. It recognizes and corrects for single nuclear scatterings in the presence of multiple Coulomb scatterings. Momentum components are determined and kinematic constraints are applied. Measured parameters are performed into special reference frames and quantities of physical interest are calculated. Results are stored in a tape file containing all events of one reaction type.
Date: November 10, 1960
Creator: White, Howard S.
Object Type: Report
System: The UNT Digital Library
Resistance Measurements To 400 Kilobars (open access)

Resistance Measurements To 400 Kilobars

A modification of the Bridgeman anvils is described. This modification permits studies to be made to a load of 400 kbars, about twice that previously available.
Date: November 8, 1960
Creator: Vaisnys, Juozas; Stromberg, Harold & Jura, George
Object Type: Report
System: The UNT Digital Library
Photoproduction Of Neutral Pions As A Function Of Mass Number (open access)

Photoproduction Of Neutral Pions As A Function Of Mass Number

The relative yield of neutral photopions from various elements was determined as a function of the quantum limit energy of the Berkeley synchrotron. Single decay photons from neutral pions were observed at 45, 90, and 135 deg to the incident bremsstrahlung in the laboratory system. Mean free paths for neutral pions in nuclear matter were obtained, an optical model prediction of the photopion yields based upon pion-nucleus scattering data was confirmed, and the presence of coherent pion production in the forward direction was detected.
Date: November 4, 1960
Creator: Anderson, John D.; Goodwin, Lester K. & Kenney, Robert W.
Object Type: Report
System: The UNT Digital Library
Evaluation Of High-Speed Two-Tube Configurations: Part I. Greater Gain-Bandwidth In Trigger Circuits Part II. Transient Analysis Of The White Cathode Follower (open access)

Evaluation Of High-Speed Two-Tube Configurations: Part I. Greater Gain-Bandwidth In Trigger Circuits Part II. Transient Analysis Of The White Cathode Follower

This study is concerned with a class of circuits which employs two tubes in a series connection--sometimes referred to as the stacked-tubes connection. This study will be concerned with two configurations that have shown considerable promise in the field of high speed circuitry. In Part I a configuration called the dynamic plate load amplifier is dealt with. In Part II a configuration called the White cathode follower is examined.
Date: November 1959
Creator: Brown, Melvin
Object Type: Report
System: The UNT Digital Library
Forces Between Nucleons And Antinucleons (open access)

Forces Between Nucleons And Antinucleons

Existing experimental information about the nucleon-anitnucleon interaction is reviewed, and a description is given of a theoretical model, based on the Yukawa theory, which seems able to explain the experimental results.
Date: November 25, 1958
Creator: Chew, Geoffrey F.
Object Type: Report
System: The UNT Digital Library
Transient Reactor Aerothermodynamics (open access)

Transient Reactor Aerothermodynamics

The transient aerothermodynamic processes in a gas-cooled reactor are described in a simplified manner to illustrate some of the fundamental physical phenomena involved, to provide some approximate but useful methods of analysis, and to aid in the understanding and use of more complex computer solutions. The transient heat balance equation for an element of a single reactor channel is derived in terms of aerothermodynamic time constants, and typical analytic solutions for transients are presented. This equation is used in generating the time-dependent equation for the channel exhaust gas temperature. The single-channel analysis is extended to multiple channels. A method for determining the approximate transient temperature envelopes for various reactor components is presented. The effects of aerodynamic and thermal coupling between different reactor channels are illustrated. Some of the simplifying assumptions are investigated with respect to the conditions under which they are valid.
Date: November 18, 1963
Creator: Rodean, Howard C.
Object Type: Report
System: The UNT Digital Library
Photon-Induced Neutron Spectrum from Uranium (open access)

Photon-Induced Neutron Spectrum from Uranium

An experiment has been performed using nuclear emulsions to measure the neutron flux and energy spectrum from a thick uranium target bombarded by 18-Mev electrons. The total integrated flux of 3.6 x 10(-4) neutrons/electron found here is considerably lower than the figure reported by other investigators. We attribute this discrepancy primarily to a wandering of the electron beam. The neutron spectrum should be unaffected. In addition to the expected peak at 1 Mev the energy spectrum shows a secondary peak at about 5 Mev. The shape of the experimental spectrum excluding this secondary peak, is fitted theoretically by a combination of the "evaporative" and "resonance direct" effects.
Date: November 8, 1960
Creator: Kornblum, Harry N. & Freden, Stanley C.
Object Type: Report
System: The UNT Digital Library
A Bibliography of LRL (Berkeley and Livermore) Unclassified Reports on Magnetohydrodynamics and Plasma (open access)

A Bibliography of LRL (Berkeley and Livermore) Unclassified Reports on Magnetohydrodynamics and Plasma

A title list of 119 reports published between 1952 to mid 1960 is given.
Date: November 1960
Creator: Gleichman, Dorothy L.
Object Type: Report
System: The UNT Digital Library
Observations on the Response of Two P-NJunction Diodes to Protons (open access)

Observations on the Response of Two P-NJunction Diodes to Protons

The response of a two silicon p-n junction diodes has been measured for protons up to 13.3 Mev. In one case the dependence of depletion layer thickness with bias voltage was found to be T or V(0.46). The observed resolution, made up of contributions from crystal noise, beam width, and scatterer thickness, was about 1% for 9-Mev protons.
Date: November 22, 1960
Creator: Benveniste, J.; Booth, R. & Mitchell, A. C.
Object Type: Report
System: The UNT Digital Library
The "Near" Magnetic Induction Signal from a Nuclear Explosion Due to Movement of the Earth's Magnetic Field (open access)

The "Near" Magnetic Induction Signal from a Nuclear Explosion Due to Movement of the Earth's Magnetic Field

The "near" magnetic induction signal from a nuclear explosion in the earth's atmosphere due to movement of the earth's magnetic field is predicated upon the entrapment of the earth's magnetic flux in the air surrounding the bomb. The entrapment of the flux is due to the initial conductivity of the ionization created by gamma rays. The subsequent movement of the magnetic flux is determined by the hydrodynamics of the expanding fireball so that a spherical hole is blown in the magnetic field distorting the line of force. Slow magnetic field changes of up to 10 gauss occur during 1 second due to be bending of the earth's lines.
Date: November 1960
Creator: Colgate, Stirling A.
Object Type: Report
System: The UNT Digital Library
Project Cowboy : Close-in Pressure Measurements with Tourmaline Crystals on Tamped Detonations (open access)

Project Cowboy : Close-in Pressure Measurements with Tourmaline Crystals on Tamped Detonations

In January and February, 1960, Lawrence Radiation Laboratory personnel conducted a series of experiments in Phase II of Project Cowboy in which tourmaline crystal transducers, located very close (3 to 50 feet) to tamped high explosive detonations, detected dynamic elasto-plastic stress waves generated in salt. The detonations occurred 110 feet below the 800-foot working level of the Carey Salt Mine, near Winnfield, Louisiana. These experiments were designed to measure dynamic stress conditions resulting from explosion in the earth media, of which little is known at present, and to provide data for comparative calculations on seismic disturbances from tamped explosions and from explosion in large underground cavities. Eleatic stress waves of 1 kilobar magnitude were observed, with velocities of about 15,000 ft/sec. Inelastic stress waves up to 6 kilobars in magnitude were measured. Velocities for these waves were in the range 9000 to 12,000 ft/sec.
Date: November 7, 1960
Creator: Lindsay, William F.; Heusinkveld, Myron; Villaire, Alfred E. & Krause, Otto H.
Object Type: Report
System: The UNT Digital Library
Study of Electric Propulsion Systems for Space Travel : Final Report (open access)

Study of Electric Propulsion Systems for Space Travel : Final Report

A study of the basic problems associated with the use of electrical propulsion systems for space travel has been carried out at the Lawrence Radiation Laboratory. The emphasis is on large systems capable of manned flight.
Date: November 16, 1959
Creator: Fox, Robert H.
Object Type: Report
System: The UNT Digital Library
Effect of Choice of Electrical Conductor on Power Requirements of Low Temperature Magnets (open access)

Effect of Choice of Electrical Conductor on Power Requirements of Low Temperature Magnets

Introduction. As has been shown by Post, the total power required to produce a strong, steady-state magnetic field is strongly dependent upon the temperature at which the electrical conductor of the magnet operates. The power required for operation at very low temperature can, in some cases, be much less than that required for ambient temperature operation. The power required for low temperature operation depends on many system characteristics which include the metal chosen for the electrical conductor, the purity of this metal, and efficiency of the refrigeration equipment. This paper shows the relative power requirement, as a function of temperature, of a magnet with a particular shape and with a field strength of 100,000 gauss. Data is shown for three electrical conductors: copper, aluminum, and sodium.
Date: November 13, 1959
Creator: Mallon, Richard G.
Object Type: Report
System: The UNT Digital Library
Thermal Conductivity of Metal Interfaces (open access)

Thermal Conductivity of Metal Interfaces

The coefficients of thermal conductivity of aluminum-bismuth metal-to-metal bonds, and of aluminum and bismuth surfaces in contact under pressure, were measured.
Date: November 30, 1950
Creator: Heckman, R. A.
Object Type: Report
System: The UNT Digital Library
300-KV Pulser Transformer and Pulser. (open access)

300-KV Pulser Transformer and Pulser.

Photographs and working drawings are presented for a small (approximately 4.25 X 7 X 9 inch) 300Kv pulse transformer having double-conical secondaries each with a corona ring at its greatest diameter. The pulser circuit is shown but no text is included.
Date: November 1951
Creator: Heller, R. E.
Object Type: Report
System: The UNT Digital Library
Discriminator Calibrator (open access)

Discriminator Calibrator

To calibrate a pulse height discriminator, the amplitude of the calibrating pulse must be known. If the amplitude is known, the discriminator dial may be calibrated in terms of the input signal required to just trip it. This is the purpose for which the Discriminator Calibrator was designed. It produces pulses of variable but known amplitude with a rep. rate variable from 3 pps to 4000 pps. The main use of this unit at the UCRL is in conjunction with scalers at fixed counting locations.
Date: November 27, 1951
Creator: Stripeika, Alex J. & Newton, Gene B.
Object Type: Report
System: The UNT Digital Library
Fixation of Carbon Dioxide by Barley Roots (open access)

Fixation of Carbon Dioxide by Barley Roots

The uptake of carbon dioxide by plant roots preparations has been demonstrated by various authors. In addition to confirming the fact of fixation, I have investigated the effect of a number of factors involved and the compounds in which the absorbed carbon appears, using carbon-14.
Date: November 30, 1951
Creator: Poel, L. W.
Object Type: Report
System: The UNT Digital Library
Preliminary Considerations Regarding Stability of MTA Mark I as a Closed-Loop System (open access)

Preliminary Considerations Regarding Stability of MTA Mark I as a Closed-Loop System

The basic scheme under consideration in this research on stability of closed-loop of the Mark I machine is one in which a voltage proportional to the magnitude of the rf fields in the cavity acts to control rectifier voltage output. It is recognized that such is not the only scheme for maximization of output which may be conceived, but only what seems to be a logical and direct way of attaining such an objective.
Date: November 1, 1951
Creator: Waddell, J. F.
Object Type: Report
System: The UNT Digital Library