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Acoustic microscopy at 15.3 GHz in pressurized superfluid helium

 

作者: M. S. Muha,   A. A. Moulthrop,   G. C. Kozlowski,   B. Hadimioglu,  

 

期刊: Applied Physics Letters  （AIP Available online 1990）
卷期: Volume 56, issue 11  

页码: 1019-1021

 

ISSN:0003-6951

 

年代: 1990

 

DOI:10.1063/1.102603

 

出版商: AIP

 

数据来源: AIP

 

摘要:

An acoustic microscope operating at 15.3 GHz and using superfluid4He 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.

 

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