Cagnoli G, Gammaitoni L, Hough J, Kovalik J, McIntosh S, Punturo M, Rowan S
Dipartimento di Fisica, Universita di Perugia, I-06100 Perugia, Italy and GEO600 Project, Department of Physics and Astronomy, University of Glasgow, G12 8QQ Glasgow, United Kingdom.
Phys Rev Lett. 2000 Sep 18;85(12):2442-5. doi: 10.1103/PhysRevLett.85.2442.
We present for the first time the results of very high Q factor measurements for a 2.8 kg fused silica mass suspended by two fused quartz fibers attached by a novel technique for joining fused silica or quartz. The Q for the pendulum mode at 0.93 Hz was (2.3+/-0. 2)x10(7), the highest value demonstrated to date for a mass of this size. By employing such a new suspension system the sensitivity of the gravitational wave detectors currently under construction can be increased up to 1 order of magnitude.
