Accession Number : AD0431821


Title :   INVESTIGATION OF SECONDARY PHENOMENA FOR USE IN CHECKOUT,


Corporate Author : SYSTEMS RESEARCH LABS INC DAYTON OHIO


Personal Author(s) : Hwang,Gilbert S H


Report Date : Jan 1964


Pagination or Media Count : 136


Abstract : This report discusses the experimental work, results, and conclusions of the investigation of secondary phenomena for use in checkout of electronic components and circuitry. It consists of a literature survey of the various secondary phenomena generated by operating electronic circuits and the methods of sensing them without direct electrical contact with these circuits. The investigation of physical laws and phenomena, from which suitable subjects for further consideration were selected, was also part of this program. The literature survey was of little assistance in the program as only a limited amount of work had been previously attempted on the effects of secondary phenomena. Different detection techniques of various secondary phenomena were tested experimentally: these were x-ray absorption, infrared using a thermistor, infrared using fluorescence, radio-frequency emission, magnetic fields, and electric fields. At present the x-ray absorption, infrared and radio frequency emission show the most promise for future consideration, although these systems will require additional time and effort to develop the techniques and necessary instrumentation. (Author)


Descriptors :   *CIRCUITS , TEST METHODS , TEST METHODS , X RAY ABSORPTION ANALYSIS , INFRARED RADIATION , MAGNETIC FIELDS , THERMISTORS , FLUORESCENCE , RADIOFREQUENCY SPECTROSCOPY , EMISSIVITY , INFRARED DETECTORS , INFRARED PHENOMENA , TEST EQUIPMENT , ELECTRONIC EQUIPMENT , THERMIONIC EMISSION , THERMAL RADIATION , ELECTROSTATIC FIELDS , BIBLIOGRAPHIES , PHYSICAL PROPERTIES


Distribution Statement : APPROVED FOR PUBLIC RELEASE