Accession Number : AD0429179


Title :   A PULSED HYPERSONIC TECHNIQUE AND SOME ATTENUATION MEASUREMENTS IN QUARTZ AT LOW TEMPERATURES,


Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA


Personal Author(s) : DE Klerk,J ; Bolef,D I


Report Date : 01 Nov 1963


Pagination or Media Count : 1


Abstract : Conventional pulsed surface excitation of quartz in the kilomegacycle range of frquencies almost invariably produces non-exponentially decaying echo envelopes, making reliable attenuation measurements difficult. This difficulty can frequently be overcome by the use of conventional transducers and by careful bonding techniques. This transducer technique, methods of simultaneously generating compressional and shear modes in quartz and a tunable cavity capable of being operated over a wide frequency range are described. Applications of this equipment to the measurement of attenuation of hypersound in single crystal quartz as a function of transmitter power and of temperature below 20 K are briefly described. (Author)


Descriptors :   *QUARTZ , *ATTENUATION , EXCITATION , MEASUREMENT , SINGLE CRYSTALS , PULSE GENERATORS , HYPERSONIC CHARACTERISTICS , OSCILLOSCOPES , PROPAGATION , ELECTROMAGNETIC PROBES , TRANSDUCERS , SHEAR STRESSES


Distribution Statement : APPROVED FOR PUBLIC RELEASE