Acoustic Microscopy at Cryogenic Temperatures.

Abstract

We report progress in work on a cryogenic acoustic microscope. Results in liquid argon and nitrogen at about 4300 angstrom wavelength are discussed. Images of gratings and integrated circuits are presented as examples of resolution and contrast. Work on producing effective matching layers to improve acoustic power transfer between solids and helium is summarized. Finally we present images taken in superfluid helium held at 1.95 degrees K. A wavelength of 3600 angstrom was attained, the shortest wavelength ever achieved in an acoustic microscope. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1979
Accession Number
ADA074502

Entities

People

  • Calvin Quate
  • J. Heiserman

Organizations

  • Stanford University

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Attenuation
  • Acoustic Impedance
  • Acoustic Microscopes
  • Acoustic Properties
  • Acoustic Velocity
  • Field Effect Transistors
  • Films
  • Frequency
  • Glass
  • Images
  • Integrated Circuits
  • Materials
  • Mechanical Properties
  • Microscopes
  • Microscopy
  • Vibration
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Combustion and Flow Dynamics.
  • Optical Physics and Photonics.