Reports until 09:27, Tuesday 26 August 2025
H1 TCS
matthewrichard.todd@LIGO.ORG - posted 09:27, Tuesday 26 August 2025 - last comment - 14:20, Tuesday 26 August 2025(86566)
Changing TCS-SIM values for surface defocus effects

M. Todd, C. Compton, S. Dwyer


We changed the gain settings in TCS-SIM that convert the powers of each actuator (including self-heating) to surface defocus for calculating the overall radius of curvature of each test mass at a given thermal state.

The motivation for this was that the simulation seems to be largely overestimating the Higher Order Mode spacing. Hopefully, with these new predictions, we will observe better agreement between the simulation and HOM measurements.

We also changed the absorption values using values taken from alog 80714 for the ITMs, and using galaxy for the values for the ETMs.

 

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anthony.sanchez@LIGO.ORG - 14:20, Tuesday 26 August 2025 (86585)

Hey.... these are some SDF's that I think are related to your work.
I accepted them all.

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