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

Full text not available in this repository.Request a copy

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.

ORCID iDs

Lockerbie, N.A. ORCID logoORCID: https://orcid.org/0000-0002-1678-3260, Chapelier, C. and Blanchard, J.J.;