Electromagnetic characterization of superconducting radio-frequency cavities for gw detection

Details Electromagnetic characterization of superconducting radio-frequency cavities for gw detection Electromagnetic characterization of superconducting radio-frequency cavities for gw detection

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cqgra..21s1241b&link_type=abstract

Classical and Quantum Gravity, Volume 21, Issue 5, pp. S1241-S1246 (2004).

Physics

5

Scientific paper

The electromagnetic properties of a prototype gravitational wave detector, based on two coupled superconducting microwave cavities, were tested. The radio-frequency (rf) detection system was carefully analysed. With the use of piezoelectric crystals small harmonic displacements of the cavity walls were induced and the parametric conversion of the electromagnetic field inside the cavities explored. Experimental results of bandwidth and sensitivity of the parametric converter versus stored energy and voltage applied to the piezoelectric crystal are reported. A rf control loop, developed to stabilize phase changes on signal paths, gave a 125 dBc rejection of the drive mode on a time scale of 1 h.

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