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Convergence of the Quasi-chemical Method for the Ising Square Lattice

Description: The Ising model, a system of atoms arranged on a lattice with simple nearest neighbor interactions, provides a more or less realistic description of many physical systems. The state of each atom is specified by a two-valued variable, which may be identified with: (1) its spin (up or down), if one wishes to describe a magnetic system; (2) its identity (A or B), if one wishes to describe a a mixture of two kinds of atoms; or (3) its presence or absence (atom or hole), if one is dealing with a lat… more
Date: January 1960
Creator: Brush, Stephen G.
Item Type: Refine your search to only Report
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Diagnostic Measurements of a Highly Ionized, Steady-state Plasma

Description: This paper is primarily intended to give an account of a few of the diagnostic techniques that have been applied to a highly ionized, steady-state helium plasma at the Lawrence Radiation Laboratory. However, to establish a proper perspective it will first be well to describe briefly the system in which the plasma is generated and studied.
Date: 1960
Creator: Gardner, Andrew L.
Item Type: Refine your search to only Report
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Monte Carlo Schemes for Neutron Migration Using Importance Sampling and Splitting

Description: Abstract. Monte Carlo methods using importance sampling and splitting are proposed for estimating the effectiveness of neutron shields. As usual, the aim is to increase the number of particles that go through or around the shield, this increase being compensated by a decrease in the weights of these particles. With suitable modifications, the ideas are applicable to to other Monte Carlo problems. One way of using splitting and Russian roulette is to require that the weight of each particle be a… more
Date: 1960
Creator: Kaplan, Edward L.
Item Type: Refine your search to only Report
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Nuclear Emulsion Experiments in the Inner Radiation Belt

Description: Since the discoveries by the early U. S. and Russian satellites of the great radiation belts which surround the earth a considerable amount of effort has been expended to determine the nature, flux, and energy distribution of the trapped particles. This is done for serval reasons. First, it is important for purely geophysical and geomagnetic purposes to understand the source of these particles as well as the magnetic trapping phenomena and loses mechanisms. Secondly, it is imperative, if one is… more
Date: 1960
Creator: Freden, Stanley Charles, 1927-; Oliver, Albert J. & White, R. Stephen, 1920-
Item Type: Refine your search to only Report
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On the Establishment of a Temperature Function

Description: Among the thermodynamic variables, which include temperature (T), energy per unit mass (E), volume per unit mass (V), pressure (p), and others any two may be selected as independent, and on this pair will depend, in principle, every other variable, each such relationship constituting an "equation of state". Thus, the common choice of V and T as independent variables implies that E is given by a function E(V,T), p by a function p(V,T), and similarly for the other variables. Occasionally, it is d… more
Date: 1960
Creator: Aron, W. & Parker, L.
Item Type: Refine your search to only Report
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Polarization in Pion-Nucleon Scattering and the Second and Third Pion-Nucleon Resonances

Description: Abstract. The polarization of the recoil nucleon in pion-nucleon scattering is studied from the point of view of providing a means of distinguishing among the various angular momentum assignments proposed for the higher pion-nucleon resonances. It is shown that polarization in this reaction is just as useful a guide as polarization in photoproduction. In particular, a measurement of the polarization at and in the neighborhood of 90 degrees in the energy range between the first and third resonan… more
Date: January 1960
Creator: Moravcsik, Michael J.
Item Type: Refine your search to only Report
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Propellants for Electrical Propulsion Systems : Panel Discussion of Rocket Propellants, American Chemical Society Meeting, Berkeley, August 8

Description: As we might suspect, the propellant problems for electrical propulsion systems are quite different than those of chemical or nuclear propulsion schemes. In those cases, two of the most important parameters were the propellant temperature and mean molecular weight. Here we are sidestepping the temperature requirement entirely by using electrical energy for the energy source rather than chemical or thermal energy. Of course, mission analysis have demonstrated that the energy per unit weight requi… more
Date: 1960
Creator: Fox, Robert H.
Item Type: Refine your search to only Report
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Standardization in the Design and Construction of Electronic Instrumentation and Control Systems

Description: Abstract. An extensive activity at the University of California Lawrence Radiation Laboratory is the design and construction of elaborate electronic systems for instrumentation and control of test and research facilities. Design and construction of these large scale electronic systems is guided by principles and practices of standardization which reduce system cost and completion time. A summary of these standardization principles and practices is presented.
Date: 1960
Creator: Nish, J. G.
Item Type: Refine your search to only Report
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Non-military Uses of Nuclear Explosions

Description: Introduction. With the development of fission and subsequently of thermonuclear explosives, a very large source of cheap energy has become available. The problem of using this energy for peaceful purposes safely and economically presents itself as one of the most interesting and important of our time. In explosions the energy is released very suddenly. Conversion of this sudden release of energy at extremely high temperature and pressure into the form of useful work, either mechanical or chemic… more
Date: January 6, 1960
Creator: Brown, Harold
Item Type: Refine your search to only Report
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A New Liquid Explosive, NTN

Description: Abstract. The preparation and properties of a new explosive, liquid over the range -65 degrees F to +165 degrees F, are presented. This explosive, called NTN, is a 5/1/1 mole ration of nitromethane, tetranitromethane, 1 -nitropropane. The sensitivity and stability of NTN meet military requirements.
Date: January 28, 1960
Creator: Von Egidy, Albert.; Finger, Milton.; Hill, Marion.; Ornellas, Donald L.; Ellison, Edward. & Kury, John.
Item Type: Refine your search to only Report
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Image Converter Tubes : Manufacturer's Data

Description: Introduction. A survey has been made of the image converter tubes generally available in this country and Europe. Ultraviolet and infrared types using photocathodes were included, buy x-ray and solid state types were omitted. Since this is the first time that this list has been compiled, it may have errors and omissions. The author will appreciate any corrections or suggestions, and it is hoped that revised lists will be published from time to time.
Date: February 1960
Creator: Inami, F. K.
Item Type: Refine your search to only Report
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A Systematic Procedure for Preparing Specifications on Electronic Instrumentation and Control Systems

Description: Abstract. A systematic procedure for preparing purchase specification on electronic instrumentation or control systems has been developed. This procedure results in preparation of specifications which: 1) make it possible to find any particular specification requirement quickly; and 2) insure that no important requirement has been omitted. Details of this systematic specification preparing procedure presented.
Date: February 4, 1960
Creator: Olken, Hyman
Item Type: Refine your search to only Report
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Scintillation Counter [gamma]-Spectra Unfolding Code for the IBM-650 Computer

Description: Abstract. An IBM-650 computer code for the detailed unfolding of [gamma]-ray spectra obtained from NaI scintillation counters has been developed. The procedure is set up to remove analyzer scale dependence and to largely remove energy dependences. Computer time is about 1 minute per [gamma]-ray.
Date: February 17, 1960
Creator: West, Harry I., Jr. & Johnston, Bradley.
Item Type: Refine your search to only Report
open access

Neutron Diffusion Theory Programs and Their Application to Simple Critical Systems

Description: Introduction. The Lawrence Radiation Laboratory of the University of California has developed a series of reactor neutronic programs for an IBM 709 Data Processing System.. This paper presents a brief outline of these codes and includes the results of one- and two-dimensional diffusion calculations used to interpret data from a series of enriched-uranium beryllium-oxide moderated critical measurements. These were performed for the specific purpose of evaluating the computer programs. The time-i… more
Date: March 1960
Creator: Stone, Stuart P. & Lingenfelter, Richard E.
Item Type: Refine your search to only Report
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Tory II-A Instrumentation System : Brief Description

Description: Abstract. The Tory II-A reactor is a small, air cooled, high power-density reactor which is to operate at quite high temperatures. Design of the reactor is essentially complete. First operation is scheduled for late 1960 at the Nevada Test Site of the Atomic Energy Commission. Since the reactor is unshielded, the control room which houses the recording and indicting equipment is located approximately two miles from the test bunker. Signals from reactor and facility transducers are amplified in … more
Date: March 3, 1960
Creator: Barnett, Charles S.; McDonald, Henry C. & Uthe, Paul M.
Item Type: Refine your search to only Report
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Thermal Stresses In A Liquid Hydrogen Transfer Line

Description: A variable-length vacuum-insulated liquid hydrogen transfer line is described. The vacuum system is semi-permanent, and segments of the line are assembled with only threaded vacuum fittings. Thermal stress calculations are presented for a statically indeterminate union coupling.
Date: March 20, 1960
Creator: Pope, William L.
Item Type: Refine your search to only Report
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State of Matter at High Pressure

Description: Abstract. The region where exact thermodynamic description of the state of matter at high pressure and high temperature is possible is located. In the remaining region various approximate theories and empirical relations are discussed. These considerations are applied to hydrogen to locate the density and pressure at which the diatomic bond collapses. Also the approximate conditions are determined at which no bound electron states exist.
Date: March 31, 1960
Creator: Alder, Berni J.
Item Type: Refine your search to only Report
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