Differences between revisions 10 and 11
⇤ ← Revision 10 as of 2009-06-05 03:45:05 →
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Editor: KentaroSomiya
Comment:
← Revision 11 as of 2009-06-05 05:20:43 → ⇥
Size: 2692
Editor: KentaroSomiya
Comment:
Deletions are marked like this. Additions are marked like this.
Line 14: Line 14:
|| Mirror thickness || 15cm ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue4|issue 4]]|| || Mirror thickness || 15cm || ||
Line 19: Line 19:
|| 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]]||		 || Mechanical loss of Silica coating || 1e-4 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue5|issue 4]]||
|| Mechanical loss of Tantala coating || 4e-4 ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue5|issue 4]]||
|| Optical loss of each arm || 70ppm/roundtrip ||[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue6|issue 5]]||
Line 24: Line 24:
|| Bulk absorption || 20ppm/cm || [[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue4|issue 6]] ||
|| Coating absorption || 0.1ppm/cm || [[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise/issue4|issue 6]] ||

..Up

Classical-Noise parameters

There are some issues to be discussed.

Beam radius

3cm

issue 1

Suspension length

40cm

Suspension thickness

1.8mm

issue 2

Number of suspension fiber

4

Temperature of suspension

16K

Mechanical loss of fiber

2e-7

Mirror radius

12.5cm

issue 3

Mirror thickness

15cm

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

issue 4

Mechanical loss of Tantala coating

4e-4

issue 4

Optical loss of each arm

70ppm/roundtrip

issue 5

Optical loss in the SRC

2%

Optical loss at the PD

10%

Bulk absorption

20ppm/cm

issue 6

Coating absorption

0.1ppm/cm

issue 6

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 /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 /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 /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 /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 /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 /K

LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise (last edited 2009-06-09 16:20:41 by whitehole)