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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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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.		  
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== Things to be looked into ==
= What are the ideal cavity parameters? =
= Thermal effects due to circulating arm cavity power =
= HOM degeneracy =
= Increase or decrease RoC of the ETM to correct for inhomogeneities (also by how much) =		 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

  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

Advanced_Techniques/Adaptive_Thermal_Compensation (last edited 2013-11-16 13:50:04 by ManasadevithirugnanasambandamATligoDOTorg)