High frequency resonant ultrasound spectroscopy to 50 MHz: Experimental developments and analytical refinement

Akira Yoneda, Yoshitaka Aizawa, Md Mahbubar Rahman, Shunsuke Sakai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

High-frequency transducers up to 50MHz were developed for resonant ultrasound spectroscopy (RUS). The transducers were carefully designed as composites of high-Q (>100) and low-Q (<100) materials in order to be able to distinguish the resonant peaks of samples from the instrumental background. Combining the transducers with a high performance lock-in amplifier enabled us to conduct RUS of a specimen as small as ̃0.2 mm. One of the features of a lock-in amplifier is its ability to measure the phase of a resonance signal against the reference signal. We utilized this to subtract background noise and to decompose peaks that overlapped at a small frequency interval. The present experimental and analytical developments are useful for obtaining the elastic constants of high-pressure phases of minerals from sub millimeter single-crystal grains synthesized in a high-pressure apparatus.

Original languageEnglish
Pages (from-to)7898-7903
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number12
DOIs
Publication statusPublished - Dec 6 2007

Keywords

  • Acoustic signal processing
  • Acoustical instruments and techniques
  • Background subtraction
  • Lock-in amplifier
  • Resonant ultrasound spectroscopy
  • Transducers

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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