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| 1. What are the ideal cavity parameters? 2. Thermal effects due to circulating arm cavity power 3. HOM degeneracy 4. Increase or decrease RoC of the ETM to correct for inhomogeneities (also by how much) |
1. What are the ideal cavity parameters? (a reference to compare the different corrections brought about by heating the mirror) 2. Sources of inhomogeneity : (i) Surface roughness (ii) Deviation from mirror specs (iii) Thermal effects due to circulating arm cavity power 3. Increase or decrease RoC of the ETM to correct for inhomogeneities (also by how much) 4. Desired tuneable range and acheivable range 5. Best heating profile 6. Practical limitations in implementing |
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| == Modelling using SIS == | == Modelling using SIS/COMSOL == |
Thermal compensation system for the 40m arm cavity
Goal
To compensate for imperfections that arise due to optical inhomogeneities in the arm cavity mirrors by designing and implementing a thermal compensation system. 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.
Fact-finding
- What are the ideal cavity parameters? (a reference to compare the different corrections brought about by heating the mirror)
- Sources of inhomogeneity : (i) Surface roughness (ii) Deviation from mirror specs (iii) Thermal effects due to circulating arm cavity power
- Increase or decrease RoC of the ETM to correct for inhomogeneities (also by how much)
- Desired tuneable range and acheivable range
- Best heating profile
- Practical limitations in implementing