Digital ultrasonic pulse-echo overlap system and algorithm for unambiguous determination of pulse transit time

ORAL

Abstract

We report an evolution of an all-digital ultrasonic pulse technique for measurements of elastic constants of solids. An unambiguous analytical procedure is described for determining the correct time delay of echoes without any need for actual echo overlap. We also provide a simple procedure for making corrections for transducer-bond-induced phase shifts. The precision of a measurement made with this system at ambient temperature exceeds one part in 10$^{7}$ without the use of mixers, gates, time delays, and other complications normally associated with such measurements.

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Authors

  • C. Pantea

  • Dwight Rickel

    Los Alamos National Laboratory

  • A. Migliori

    LANL, Los-Alamos, NM., Los Alamos National Laboratory, Materials Science and Technology (MST)-National High Magnetic Field Laboratory (NHMFL), Los Alamos, New Mexico 87545, Los Alamos National Laboratory, National High Magnetic Field Laboratory, LANL, Los Alamos, NM, 87545

  • Jianzhong Zhang

  • y. Zhao

    Los Alamos National Laboratory, Los Alamos Neutron Scattering Center (LANSCE)-12, Los Alamos, New Mexico 87545

  • Sami El-Khatib

    Physics Department, New Mexico State University, Las Cruces, New Mexico 88003

  • Robert Leisure

    Colorado State University, Department of Physics, Fort Collins, Colorado 80523

  • Baosheng Li

    Mineral Physics Institute, State University of New York (SUNY) at Stony Brook, Stony Brook, New York 11794