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== 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 ||
|| Young's modulus of Tantala || 1.4e11 Pa ||
|| Poisson ratio of Tantala || 0.23 ||
|| Refraction index of Tantala || 2.07 ||

..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

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

Young's modulus of Tantala

1.4e11 Pa

Poisson ratio of Tantala

0.23

Refraction index of Tantala

2.07

TO BE COMPLETED...

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