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There are some issues to be discussed. || 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 || || || 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 mirror || 1e-8 || || || 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% || || == Physical constants == || 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 || || Thermal expansion of Sapphire (300K) || 5.0e-6 || 1/K|| || Specific heat of Sapphire (300K) || 790 || J/K || || 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 || || 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 || 2.07 || || || 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 || |
Classical-Noise parameters
There are some issues to be discussed.
Beam radius |
3cm |
|
Suspension length |
40cm |
|
Suspension thickness |
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 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% |
|
Physical constants
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 |
Thermal expansion of Sapphire (300K) |
5.0e-6 |
1/K |
Specific heat of Sapphire (300K) |
790 |
J/K |
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 |
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 |
2.07 |
|
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 |