IMPROVEMENT IN ULTRASONIC VELOCITY MEASUREMENT TECHNIQUES.

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)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1966
Accession Number
AD0643081

Entities

People

  • Bruce B. Chick
  • George P. Anderson
  • Rohn Truell

Organizations

  • Brown University

Tags

DTIC Thesaurus Topics

  • Aluminum
  • Crystals
  • Elements
  • Intervals
  • Magnetic Fields
  • Measurement
  • Picosecond Time
  • Single Crystals
  • Temperature Control
  • Temperature Sensitive Elements
  • Time Intervals

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Fluid Dynamics.
  • Systems Analysis and Design