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Proceedings Paper

Helium Acoustic Microscopy
Author(s): A. F.G. Wyatt
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Paper Abstract

Acoustic microscopy using liquid 4He offers the possibility of considerably higher resolution than microscopes at room temperature which use water as the coupling medium. At the same frequency the wavelength of sound in liquid helium is a sixth of that in water and because there is no attenuation in liquid 4He there is the possibility of using much higher frequencies than is presently used (3 GHz) with water. The properties of liquid 4He rele-vant to this application are reviewed together with the equipment necessary to work at 0.1K. The information likely to be obtained from helium microscopy is considered and compared to room temperature acoustic microscopy. Although helium acoustic microscopy is still in its infancy recent results indicate that it is likely to be a valuable new tool.

Paper Details

Date Published: 29 March 1983
PDF: 8 pages
Proc. SPIE 0368, Microscopy: Techniques and Capabilities, (29 March 1983); doi: 10.1117/12.934328
Show Author Affiliations
A. F.G. Wyatt, University of Exeter (England)

Published in SPIE Proceedings Vol. 0368:
Microscopy: Techniques and Capabilities
Lionel R. Baker, Editor(s)

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