Experimental tests on re-entrant klystron cavity for a gravitational wave antenna

Details Experimental tests on re-entrant klystron cavity for a gravitational wave antenna Experimental tests on re-entrant klystron cavity for a gravitational wave antenna

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cqgra..21s1221b&link_type=abstract

Classical and Quantum Gravity, Volume 21, Issue 5, pp. S1221-S1224 (2004).

Physics

1

Scientific paper

The present work quantifies the dependence of the tunable frequency range on the gap spacing between the end of the conical insert and the cavity plate in re-entrant 1.0 GHz klystron cavities. Fabricated from aluminium, the cavities tested are 80 mm in diameter with the top plate 1 mm thick. Experiments performed on such cavities have shown tuning coefficients (change in resonant frequency due to variation of the capacitive gap) as high as 40.0 MHz µm-1, thereby demonstrating the capability of re-entrant cavities as electromechanical transducers in resonant mass gravitational wave antennas. In cavity-based transducers ten times as small as the cavities tested here, like the type used on the gravitational wave antenna Niobé, this result translates into a tuning coefficient 100 times higher.

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