Acoustic microscopy at 15. 3 GHz in pressurized superfluid helium

Journal Article · Mon Mar 12 00:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.102603· OSTI ID:6856829

Muha, M S; Moulthrop, A A; Kozlowski, G C ^[1]; Hadimioglu, B ^[2]

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1. The Aerospace Corporation, Mail Station M1/110, P. O. Box 92957, Los Angeles, California 90009 (USA)
2. Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305 (USA)

An acoustic microscope operating at 15.3 GHz and using superfluid {sup 4}He as the coupling medium has been developed. The helium is colder than 0.9 K to achieve low acoustic attenuation, and is pressurized to greater than 20 bar to eliminate three-phonon processes which saturate the received signal as the input power is increased. A resolution of 150 A has been achieved.

• OSTI ID: 6856829
• Journal Information: Applied Physics Letters; (USA), Vol. 56:11; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACOUSTIC MICROSCOPY
FABRICATION
HELIUM 4
ATTENUATION
GHZ RANGE 01-100
INHIBITION
MEDIUM PRESSURE
OPERATION
PRESSURIZING
RESOLUTION
SATURATION
SUPERFLUIDITY
ULTRALOW TEMPERATURE
EVEN-EVEN NUCLEI
FREQUENCY RANGE
GHZ RANGE
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MICROSCOPY
NUCLEI
STABLE ISOTOPES
440800* - Miscellaneous Instrumentation- (1990-)
640450 - Fluid Physics- Superfluidity