论文信息 - Intrinsic losses in various kinds of fused silica

Intrinsic losses in various kinds of fused silica

We systematically measured the intrinsic mechanical quality factors of 13 kinds of bulk fused silica from four companies using a nodal support system. Some of them have actually been adopted as mirror substrates in interferometric gravitational wave detectors. The measured quality factors widely ranged from 7 × 105 to 4 × 107. They turned out to be independent of one specific property, such as the amount of OH content, suggesting that the loss mechanism has several origins. We found that many of the samples showed smaller losses at lower frequency. From the viewpoint of the mirror thermal noise, it would be fortunate if the loss continued to decrease with decreasing frequency. We also found that an annealing process increases their quality factors.

Kenji Numata | Masaki Ando | Kimio Tsubono | Shigemi Otsuka

[1] J. R. Hutchinson. Vibrations of Solid Cylinders , 1980 .

[2] Kenji Numata,et al. Measurement of the mechanical loss of crystalline samples using a nodal support , 2001 .

[3] G. W. McMahon. Experimental Study of the Vibrations of Solid, Isotropic, Elastic Cylinders , 1962 .

[4] Joshua R. Smith,et al. LIGO: the Laser Interferometer Gravitational-Wave Observatory , 1992, Science.

[5] P. Saulson,et al. Thermal noise in mechanical experiments. , 1990, Physical review. D, Particles and fields.

[6] Stable operation of a 300-m laser interferometer with sufficient sensitivity to detect gravitational-wave events within our galaxy. , 2001, Physical review letters.

[7] Joshua R. Smith,et al. High quality factor measured in fused silica , 2000, gr-qc/0009035.

[8] G. Harry,et al. Dissipation of mechanical energy in fused silica fibers , 1999, physics/9904015.

[9] K. Kawabe,et al. Measurement of the intrinsic mechanical loss of low-loss samples using a nodal support , 2000 .

[10] Peter R. Saulson,et al. Mechanical quality factors of fused silica resonators , 1998 .