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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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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.