Measurement of the mechanical loss of crystalline samples using a nodal support

Abstract We measured the mechanical loss of crystalline anisotropic samples (silicon and sapphire) using a nodal support. The measured quality factor of the silicon sample reached 1.0×10 8 at room temperature. The sapphire sample showed lower quality factors, 6.4×10 7 at most, which were analytically confirmed to be dominated by surface loss.

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

[2]  David Blair,et al.  Sapphire beamsplitters and test masses for advanced laser interferometer gravitational wave detectors , 1996 .

[3]  David Blair,et al.  Design and verification of low acoustic loss suspension systems for measuring the Q-factor of a gravitational wave detector test mass , 1998 .

[4]  S. Hawking,et al.  THEORY OF THE DETECTION OF SHORT BURSTS OF GRAVITATIONAL RADIATION. , 1971 .

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

[6]  Shinji Miyoki,et al.  LARGE-SCALE CRYOGENIC GRAVITATIONAL WAVE TELESCOPE , 1999 .

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

[8]  Alan W. Hoffman,et al.  Measurements of the mechanical Q of single-crystal silicon at low temperatures , 1978 .

[9]  V. Braginsky,et al.  Systems with Small Dissipation , 1986 .

[10]  Takayuki Tomaru,et al.  MECHANICAL QUALITY FACTOR OF A CRYOGENIC SAPPHIRE TEST MASS FOR GRAVITATIONAL WAVE DETECTORS , 1999 .

[11]  An investigation of coupled resonances in materials suitable for test masses in gravitational wave detectors , 1991 .

[12]  M. Fejer,et al.  Investigation of mechanical loss factors of some candidate materials for the test masses of gravitational wave detectors , 2000 .

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