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Title: Highly sensitive simple homodyne phase detector for ultrasonic pulse-echo measurements

Progress in microelectronic technology has allowed us to design and develop a simple but, professional quality instrument for ultrasonic pulse-echo probing of the elastic properties of materials. The heart of this interfer- ometer lies in the AD8302 microchip, a gain and phase detector from Analog Devices, Inc. The interferometer was tested by measuring the temperature dependences of the ultrasound speed and attenuation in a ferro- electric KTa 0.92 Nb 0.08O 3 (KTN) crystal at a frequency of about 40 MHz. These tests demonstrated that our instrument is capable of detecting the relative changes in the sound speed v on the level of Δv/v ~ 10 –7. In addition, the ultrasound attenuation revealed new features in the development of the low-temperature structure of the ferroelectric KTN crystal.
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Colgate Univ., Hamilton, NY (United States)
  2. National High Magnetic Field Lab., Tallahassee, FL (United States)
  3. Towson Univ., Towson, MD (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Gordon College, Wenham, MA (United States)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 4; Journal ID: ISSN 0034-6748
American Institute of Physics (AIP)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; ultrasonic pulse-echo technique; ultrasonic attenuation; wave attenuation; Ferroelectric phase transitions; temperature measurement; transducers
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1246185