Abstract: Bechtel National, Inc. has conducted a study of the requirement for, and a preliminary design of, a photovoltaic central station test facility.

Test requirements for several components specifies that surge currents be monitored to determine if the initial peak surge current exceeds a certain predetermined amplitude. This report describes and evaluates two circuits which were developed by Organization 2451 to meet this requirement in production testing.

Acknowledgement: The cumulative Binomial Distribution Computer incorporates valuable suggestions made by supervision and members of the Sandia Corporation Reliability Department.

Proceedings on aerospace nuclear safety.

Abstract: The accurate measurement of voltage standing wave ratio (VSWR) is of prime importance in the production of microwave systems. The work reported in this memorandum was undertaken in the development of a faster system for measuring VSWR.

This report documents the design, development, and performance of the flight vehicle for Re-entry Flight Demonstration Number One (RFD-1).

Abstract: "This report presents a brief introduction to the Positional Tolerance Method of DImensioning as employed by Sandia Corporation. The emphasis is placed on the elimination of ambiguities and increase in tolerances provided by this method as compared to the older, bilateral method" (p. 2).

Abstract: Tests were conducted in the Jet Propulsion Laboratory's 20-inch Supersonic Wind Tunnel to determine the effect of hole-spacing geometry on the measured pressure error due to "breathing" for a pressure-sensing probe at Mach 3.01.

Introduction: Confidence limits as a mathematical tool are applicable to many development engineering and production engineering situations. In order to make confidence limits readily available to engineers, a computer was designed which will approximate certain confidence limits.

An all-transistor system has been developed to be used in measuring the reactivity of the reactor in the Sandia Engineering Reactor Facility. In operation, the system triggers a pulsed neutron source (PNS) in the reactor and counts the resulting neutron flux, thus giving a measure of the time constant of the reactor. The counting is done in eleven time-sequenced counting channels. The reactor time constant is a measure of the reactor reactivity.

Abstract: Force, moment, and center of pressure information are presented for four models of the Hi-Lo configuration.

Abstract: This report presents the vapor pressures versus temperature data graphically for the rare earth elements, yttrium and scandium.

Abstract: This memorandum presents the possible applications and instructions for using REDCROSS, an IBM-704 computer program.

Abstract: This memorandum describes the components and presents the operating and maintenance instructions for the 12-inch transonic wind tunnel analog-to-digital data gathering systems.

This report presents a description of and operating instructions for APOTA--a device which automatically tracks any signal-emitting source within the 190 to 250 MC band. APOTA is especially useful for telemetering applications.

Abstract: A method is presented of predicting the shock response of a friction-damped vibratory system.

A quantizing pulse ammeter has been designed which brackets an input pulse current peak between two preset current levels. These levels are easily selected by calibration circuits contained on the chassis. Readout is presented in the form of a Nixie visual display as well as an output which is suitable for automatic data recording.

Abstract: A mathematical model for an associative memory is proposed which uses associative addressing and distributed storage.

Craters were observed resulting from square arrays of 64-pound charges at various spacings and depths. The closest spacings yielded craters very like those from single 256-pound charges, while wider spacings yielded craters more or less square in shape and with a mound or pier at the center. Generally, the areas so uncovered were greater than for single 256-pound charges, except for very deep charges. Volumes, too, were enhanced by this configuration by as much as a factor of three. If the same factor is maintained for nuclear charges, the cost per unit volume of a crater from such an array will be within 20 percent of that for a single charge.

This report on the RFD-1 optical data and external fuel-element experiment includes a description of the instruments and test components used, a presentation of the data obtained, an explanation of the methods of data reduction employed, and a statement of the conclusions derived. It covers the theory, design, qualification tests, flight-test data, and results of the external fuel-element experiment. Also presented is a theoretical analysis of observed versus predicted ablation times and altitudes for the external fuel elements. In addition, this report presents recommendations for improvements to data acquisition and reduction methods in future, similar flight tests.

Re-entry flight demonstration number one (RFD-1) was launched on May 22, 1963 from the Scout launch complex at NASA Wallops Station, Wallops Island, Virginia.

Abstract: The purpose of this report is to describe the problems inherent to general dielectric strength measurements, and to act as a guide in establishing a method for pulse dielectric strength measurements.

Forword: The International Symposium for Packaging and Transportation of radioactive materials held at Albuquerque, New Mexico, January 12 to 15, 1965, was a joint effort on the part of the Sandia Corporation, the Albuquerque Operations Office, and the Headquarters, U.S. Atomic Energy Commission.

Abstract: RFD-2 was the second of Sandia's operational safety flight tests of systems for nuclear auxiliary power.