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| == Designing and implementing a thermal compensation system for the 40m arm cavity == | = Tuning Fabry-Perot cavity modal frequencies using controlled thermoelastic deformations on mirror surface = |
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| The goal is to compensate for imperfections that arise due to optical inhomogeneities in the arm cavity mirrors by heating the ETM. The lessons learned from this exercise will help with designing/implementing a similar kind of system for the folding mirrors in the power recycling cavity. |
== Goal == The lessons learned from this exercise will help in designing/implementing a similar kind of system for the folding mirrors in the recycling cavities. == Fact-finding == 1. What are the ideal cavity parameters? (a reference to compare the different heating models) 2. Desired tuneable range and achievable range 3. Heaters and heating patterns 4. Practical/hardware limitations in implementing == Outline == == Simulation/Modelling == 1. Find the ideal/real cavity parameters (higher order mode degeneracy) - SIS 2. Frequency tuning - SIS 3. Heating patterns - COMSOL 4. Thermally perturbed cavity analysis - SIS |
Tuning Fabry-Perot cavity modal frequencies using controlled thermoelastic deformations on mirror surface
Goal
The lessons learned from this exercise will help in designing/implementing a similar kind of system for the folding mirrors in the recycling cavities.
Fact-finding
- What are the ideal cavity parameters? (a reference to compare the different heating models)
- Desired tuneable range and achievable range
- Heaters and heating patterns
- Practical/hardware limitations in implementing
Outline
Simulation/Modelling
- Find the ideal/real cavity parameters (higher order mode degeneracy) - SIS
- Frequency tuning - SIS
- Heating patterns - COMSOL
- Thermally perturbed cavity analysis - SIS