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ANSYS simulation of LIGO ITM

ANSYS simulation of LIGO ITM. Comparison with analytical solution ( LIGO-P020026-00-D ). 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 space @ 295K

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ANSYS simulation of LIGO ITM

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  1. ANSYS simulation of LIGO ITM Comparison with analytical solution (LIGO-P020026-00-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 space @ 295K • Coating modeling included in the simulation

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

  4. Heat in the coating

  5. Heat in the substrate

  6. Coating+substrate heating

  7. HR surface AR surface Transient analysis results 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=14459.966 Hz • 2D axysimmetrical with coating: f0=14459.520 Hz • Full 3D model with coating (it takes forever): f0=14463.809 Hz

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