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'''[[../|..Up]]''' | '''[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus|..Up]]''' |
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== Classical-Noise parameters == |
== Parameters == |
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|| Beam radius ||3cm||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue1|issue 1]]|| || Suspension length ||40cm|| || || Suspension thickness ||1.8mm||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue2|issue 2]]|| || Number of suspension fiber || 4 || || || Temperature of suspension || 16K || || || Mechanical loss of fiber || 2e-7 || || || Mirror radius ||12.5cm||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue3|issue 3]]|| || Mirror thickness || 15cm ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue4|issue 4]]|| || Temperature of suspension || 20K || || || Mechanical loss of mirror || 1e-8 || || || Number of coatings (ITM) || 9 || || || Number of coatings (ETM) || 18 || || || Mechanical loss of Silica coating || 1e-4 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue5|issue 5]]|| || Mechanical loss of Tantala coating || 4e-4 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue5|issue 5]]|| || Optical loss of each arm || 70ppm/roundtrip ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue6|issue 6]]|| || Optical loss in the SRC || 2% || || Optical loss at the PD || 10% || == Physical constants == || Young's modulus of Sapphire || 4e11 Pa || || Density of Sapphire || kg/m^3|| || Poisson ratio of Sapphire || 0.29 || || Thermal expansion of Sapphire (20K) || 5.6e-9 K^-1|| || Specific heat of Sapphire (20K) || 0.69 || || Thermal conductivity of Sapphire (20K) || 1.57e4 || || Thermal expansion of Sapphire (300K) || 5.0e-6 K^-1|| || Specific heat of Sapphire (300K) || 790 || || Thermal conductivity of Sapphire (300K) || 40 || || Young's modulus of Silica || 7.2e10 Pa || || Poisson ratio of Silica || 0.17 || || Refraction index of Silica || 1.45 || || Thermal expansion of Silica (300K) || 5.1e-7 K^-1|| || Specific heat of Silica (300K) || || || Thermal conductivity of Silica (300K) || 1.38 || || dn/dT of Silica (300K) || 8e-6 K^-1 || || Young's modulus of Tantala || 1.4e11 Pa || || Poisson ratio of Tantala || 0.23 || || Refraction index of Tantala || 2.07 || || Thermal expansion of Tantala (300K) || 3.6e-7 K^-1|| || Specific heat of Tantala (300K) || || || Thermal conductivity of Tantala (300K) || 33 || || dn/dT of Tantala (300K) || 14e-6 K^-1 || |
||Beam radius ||3cm ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue1|issue 1]] || ||Suspension length ||40cm || || ||Diameter of suspension fiber ||1.8mm ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue2|issue 2]] || ||Number of suspension fiber ||4 || || ||Temperature of suspension ||16K || || ||Mechanical loss of fiber ||2e-7 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue8|issue 8]] || ||Mirror radius ||12.5cm ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue3|issue 3]] || ||Mirror thickness ||15cm || || ||Bulk absorption ||20ppm/cm ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue4|issue 4]] || ||Coating absorption ||0.1ppm ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue4|issue 4]] || ||Temperature of mirrors ||20K || || ||Mechanical loss of a mirror ||1e-8 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue7|issue 7]] || ||Number of coating layers (ITM) ||9 (?) || || ||Number of coating layers (ETM) ||18 (?) || || ||Mechanical loss of Silica coatings ||1e-4 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue5|issue 5]] || ||Mechanical loss of Tantala coatings ||4e-4 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue5|issue 5]] || ||Optical loss of each arm ||70ppm/roundtrip ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue6|issue 6]] || ||Optical loss in the SRC ||2% || || ||Optical loss at the PD ||10% || || |
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TO BE COMPLETED... | == Material properties == ||Young's modulus of Sapphire ||4e11 ||Pa || ||Density of Sapphire ||4e3 ||kg/m^3 || ||Poisson ratio of Sapphire ||0.29 || || ||Thermal expansion of Sapphire (20K) ||5.6e-9 ||1/K || ||Specific heat of Sapphire (20K) ||0.69 ||J/K/kg || ||Thermal conductivity of Sapphire (20K) ||1.57e4 ||W/m/K || ||Thermal expansion of Sapphire (300K) ||5.0e-6 ||1/K || ||Specific heat of Sapphire (300K) ||790 ||J/K/kg || ||Thermal conductivity of Sapphire (300K) ||40 ||W/m/K || ||Young's modulus of Silica ||7.2e10 ||Pa || ||Poisson ratio of Silica ||0.17 || || ||Refraction index of Silica ||1.45 || || ||Thermal expansion of Silica (300K) ||5.1e-7 ||1/K || ||Specific heat per volume of Silica (300K) ||1.64e6 ||J/K/m^3 || ||Thermal conductivity of Silica (300K) ||1.38 ||W/m/K || ||dn/dT of Silica (300K) ||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 (300K) ||3.6e-7 ||1/K || ||Specific heat per volume of Tantala (300K) ||2.1e6 ||J/K/m^3 || ||Thermal conductivity of Tantala (300K) ||33 ||W/m/K || ||dn/dT of Tantala (300K) ||14e-6 ||1/K || |
Parameters
There are some issues to be discussed.
Beam radius |
3cm |
|
Suspension length |
40cm |
|
Diameter of suspension fiber |
1.8mm |
|
Number of suspension fiber |
4 |
|
Temperature of suspension |
16K |
|
Mechanical loss of fiber |
2e-7 |
|
Mirror radius |
12.5cm |
|
Mirror thickness |
15cm |
|
Bulk absorption |
20ppm/cm |
|
Coating absorption |
0.1ppm |
|
Temperature of mirrors |
20K |
|
Mechanical loss of a mirror |
1e-8 |
|
Number of coating layers (ITM) |
9 (?) |
|
Number of coating layers (ETM) |
18 (?) |
|
Mechanical loss of Silica coatings |
1e-4 |
|
Mechanical loss of Tantala coatings |
4e-4 |
|
Optical loss of each arm |
70ppm/roundtrip |
|
Optical loss in the SRC |
2% |
|
Optical loss at the PD |
10% |
|
Material properties
Young's modulus of Sapphire |
4e11 |
Pa |
Density of Sapphire |
4e3 |
kg/m^3 |
Poisson ratio of Sapphire |
0.29 |
|
Thermal expansion of Sapphire (20K) |
5.6e-9 |
1/K |
Specific heat of Sapphire (20K) |
0.69 |
J/K/kg |
Thermal conductivity of Sapphire (20K) |
1.57e4 |
W/m/K |
Thermal expansion of Sapphire (300K) |
5.0e-6 |
1/K |
Specific heat of Sapphire (300K) |
790 |
J/K/kg |
Thermal conductivity of Sapphire (300K) |
40 |
W/m/K |
Young's modulus of Silica |
7.2e10 |
Pa |
Poisson ratio of Silica |
0.17 |
|
Refraction index of Silica |
1.45 |
|
Thermal expansion of Silica (300K) |
5.1e-7 |
1/K |
Specific heat per volume of Silica (300K) |
1.64e6 |
J/K/m^3 |
Thermal conductivity of Silica (300K) |
1.38 |
W/m/K |
dn/dT of Silica (300K) |
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 (300K) |
3.6e-7 |
1/K |
Specific heat per volume of Tantala (300K) |
2.1e6 |
J/K/m^3 |
Thermal conductivity of Tantala (300K) |
33 |
W/m/K |
dn/dT of Tantala (300K) |
14e-6 |
1/K |