1. ANSYS simulation of LIGO ITM
Comparison with analytical solution (LIGO-P D)

2. Simulation parameters
2D axysimmetrical model
Absorbed power in the coating: 10mW
Absorbed power in the substrate: 10mW
Waist of the gaussian heating beam: 3.4 cm
Radiation into 295K
Coating modeling included in the simulation

3. LIGO ITM RED: Ansys results BLUE: Analytical 12.5 cm 10 cm HR surface
AR surface
Lateral surface
RED: Ansys results
BLUE: Analytical

4. Heat in the coating

5. Heat in the substrate

6. Coating+substrate heating

7. Transient analysis results
HR surface
AR surface
Legend:
Red curve
Blue curve
Pink curve
Green curve
Simulation parameters:
-10mW absorbed in the coating
-internal steps of 5 minutes
-length of the sim: 10 hrs

8. Modal analisys results: breathing mode
2D axysimmetrical without coating: f0= Hz
2D axysimmetrical with coating: f0= Hz
Full 3D model with coating (it takes forever): f0= Hz