M. Todd, C. Cahillane

Revisiting the dataset from the March 10th, 2025  intensity noise injections that I did, Craig and I re-did a CARM pole estimate as followed in alog 65093.

Results: we estimate the CARM pole to be 0.67 +/- 0.005 Hz.

Using the Transmitted ARM RIN channels transfer function from intensity noise, we can fit a 1/f line to the low-frequency portion to estimate the CARM pole.

The plots below show some slight variation between the different channels, but all consistently around 0.67 Hz CARM pole. I have yet to examine exactly what this means for our loss estimates.

Code:

The code used to make the below plots is found:

List of Figures:

1. All together plot pdf with all transfer functions and CARM pole fits in one document
2. ISS RIN to TRX - A RIN and CARM pole fit
3. ISS RIN to TRX - B RIN and CARM pole fit
4. ISS RIN to TRY - A RIN and CARM pole fit
5. ISS RIN to TRY - B RIN and CARM pole fit