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Alignment system for 9-10 GHz longitudinal sound waves in a quartz etalon at 1.5 K

Lockerbie, N.A. and Chapelier, C. and Blanchard, J.J. (1991) Alignment system for 9-10 GHz longitudinal sound waves in a quartz etalon at 1.5 K. Review of Scientific Instruments, 62 (3). pp. 814-817. ISSN 0034-6748

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Abstract

We report the results of a system that employs four small superconducting repulsion coils and their respective niobium force-plates to restore the parallelism of a quartz-rod acoustic etalon, used for the measurement of acoustic transmission across quarter‐wave matching layers into liquid 4He. In the 9-10 GHz frequency range we find up to an eightfold improvement in the number of usable echoes for some quartz-rod samples.

Item type: Article
ID code: 17738
Keywords: helium 4, quartz, sound waves, acoustic microscopy, wave propagation, solid−fluid interfaces, acoustic measurements, ghz range, Physics, Instrumentation
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 11 May 2010 19:52
    Last modified: 05 Sep 2014 00:39
    URI: http://strathprints.strath.ac.uk/id/eprint/17738

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