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Size: 1242
Comment:
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Size: 1240
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 11: | Line 11: |
| ||Mechanical loss of Silica coatings || 5e-5? || ||Mechanical loss of Tantala coatings || 2e-4? || |
||Mechanical loss of Silica coatings || 5e-5 || ||Mechanical loss of Tantala coatings || 2e-4 || |
Parameters
Beam radius 3.5 cm Suspension length 40 cm Diameter of suspension fiber (silica) 550um (30kg) / 300um (10.8kg) Number of suspension fiber 4 Mechanical loss of fiber 6e-7 at 100Hz, 7e-8 at 1kHz Mechanical loss of a mirror 1e-8 Number of coating layers (ITM) 9 Number of coating layers (ETM) 18 Mechanical loss of Silica coatings 5e-5 Mechanical loss of Tantala coatings 2e-4
Material properties
Density of Silica 2200 kg/m^3 Young's modulus of Silica 7.2e10 Pa Poisson ratio of Silica 0.17 Refraction index of Silica 1.45 Thermal expansion of Silica 5.1e-7 1/K Specific heat per volume of Silica 1.64e6 J/K/m^3 Thermal conductivity of Silica 1.38 W/m/K dn/dT of Silica 8e-6 1/K Young's modulus of Tantala 1.4e11 Pa Poisson ratio of Tantala 0.23 Refraction index of Tantala 2.06 Thermal expansion of Tantala 3.6e-7 1/K Specific heat per volume of Tantala 2.1e6 J/K/m^3 Thermal conductivity of Tantala 33 W/m/K dn/dT of Tantala 14e-6 1/K