Highly sensitive simple homodyne phase detector for ultrasonic pulse-echo measurements
- Colgate Univ., Hamilton, NY (United States)
- National High Magnetic Field Lab., Tallahassee, FL (United States)
- Towson Univ., Towson, MD (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Gordon College, Wenham, MA (United States)
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 KTa0.92 Nb0.08O3 (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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1261260
- Alternate ID(s):
- OSTI ID: 1246185
- Journal Information:
- Review of Scientific Instruments, Vol. 87, Issue 4; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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