Accession Number:

AD0754811

Title:

A Simple Measurement Technique for Small Relative Velocity Changes of GHz Acoustic Waves,

Descriptive Note:

Corporate Author:

CORNELL UNIV ITHACA N Y MATERIALS SCIENCE CENTER

Personal Author(s):

• Edgerton,Robert F.

Report Date:

1969-08-12

Pagination or Media Count:

13.0

Abstract:

A simple method for measuring small relative acoustic velocity changes of GHz acoustic waves over a temperature range from 1.7 to 50K has been developed. It has been possible to extend the conventional pulse-echo method to the gigahertz frequency range by displaying the intermediate frequency 60 MHz on an oscilloscope and recording the changes in the phase of the IF associated with a chosen echo as a function of temperature. A precision of about 10 ppm can be achieved. Results on KClLi and KClCN- illustrate the usefulness of the technique. Author

Descriptors:

• (*NONDESTRUCTIVE TESTING
• ULTRASONIC RADIATION)
• (*PIEZOELECTRIC CRYSTALS
• ACOUSTIC PROPERTIES)
• POTASSIUM COMPOUNDS
• CHLORIDES
• DOPING
• LITHIUM
• CYANIDES
• ATTENUATION
• TEST METHODS
• TEST EQUIPMENT

Subject Categories:

• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE