Accession Number : AD0263109

Title :   PROJECT LIGHTNING. VOLUME II

Corporate Author : SPERRY RAND CORP ST PAUL MINN UNIVAC DEFENSE SYSTEMS DIV

Report Date : 28 FEB 1961

Pagination or Media Count : 1

Abstract : Research to serve as the basis for the evolution of an ultrahigh-speed data-processing system is summarized. The effects of rate of deposition, glass cleaning techniques, and different types of glass substrates on the magnetic properties of vacuum-deposited Permalloy films were studied. Rates of deposition ranging from 15 A/sec to 200 A/sec were found to have no effect on H sub C and H sub K within the error of the experiment. The magnetoelastic strain coefficient decreased slightly with increasing rate in this range. Optimum methods of making electro-deposited permalloy films were investigated. Methods were developed to reduce the composition variation. Magnetic properties of the permalloy films made are relatively poor. Both the anisotropy field and the coercive field are relatively large, and magnetic properties exhibit a large range over an array. Other investigation concerned: apparatus and instrumentation, measurements, switching and resonance studies, mathematics and logic research, and the Lightning test machine. (Author)

Descriptors :   *DIGITAL COMPUTERS, *ELECTRODEPOSITION, *MAGNETIC TAPE, *PROCESSING, COMPUTER LOGIC, MEMORY DEVICES, DATA PROCESSING, DATA STORAGE SYSTEMS, FERROMAGNETIC MATERIALS, FILMS, GLASS

Distribution Statement : APPROVED FOR PUBLIC RELEASE