Accession Number:

AD0643081

Title:

IMPROVEMENT IN ULTRASONIC VELOCITY MEASUREMENT TECHNIQUES.

Descriptive Note:

Final technical rept.,

Corporate Author:

BROWN UNIV PROVIDENCE R I DIV OF APPLIED MATHEMATICS

Report Date:

1966-10-01

Pagination or Media Count:

18.0

Abstract:

A brute force time interval measurement system capable of resolving changes in time interval of 10 picoseconds 10 to the minus 11th power sec has been developed to the point where preliminary measurements are possible with the uncalibrated breadboard system. Good triggering stability and resolution have been obtained but some drift is evident in early performance of the system which does not as yet have temperature control of known temperature sensitive elements. As a preliminary test, the system has been used to measure the small changes in velocity produced by the application of a magnetic field to an aluminum single crystal at room temperatures. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE