Acoustic properties of a hollow sphere for gravitational wave detectors

M Bassan (1, 2) , A Dewaard (3) , G Frossati (3) , S Giann (1) , Y Minenkov (2) , L Quintieri (4) , R Simonetti (2)

1 Dipartimento di Fisica
2 INFN, Sezione di Roma Tor Vergata - Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata
3 Kamerling Onnes Laboratories
4 LNF - Laboratori Nazionali di Frascati = National Laboratory of Frascati

We report on experimental work on a small prototype of a hollow sphere, aiming at assessing the feasibility of such a resonator as a third generation g.w. resonant detector. We measured the resonant frequencies and quality factors of the spheroidal quadrupolar modes of a welded hollow sphere. The eigenfrequencies are found where predicted by the theory, and the quality factors were degraded from a minimum of 20 % to a maximum of 60 % with respect to the bulk sphere.

Mots clés: Physical Sciences

M Bassan, A Dewaard, G Frossati, S Giann, Y Minenkov, et al.. Acoustic properties of a hollow sphere for gravitational wave detectors. Classical and Quantum Gravity, 2010, 27 (2), pp.25014. ⟨10.1088/0264-9381/27/2/025014⟩. ⟨hal-00569773⟩