Reports until 13:32, Tuesday 10 January 2023
H1 TCS
camilla.compton@LIGO.ORG - posted 13:32, Tuesday 10 January 2023 - last comment - 15:43, Tuesday 10 January 2023(66724)
CO2 rotation stage calibration.

Started by searching for home then ran Nutsinee/Kiwamu's RS calibration code tcs/h1/scripts/RS_calib/CO2X_calib.py (from alog 26195). Calibrated to central masks and accepted changes in svn. Motivation: The RS hasn't been re-calibrated since the CO2Y swap and requested central powers didn't match measured powers in alog 66617.

Ran calibrations with the annular mask and updated the tcs_nom_annular_pwr in lscparams to get the same 4.08W for CO2X Annular and 1.72W for CO2Y annular that we have been using at POWER_25W. See plot and below lscparams edits:

 # Reload CO2 guardians when changing this
- tcs_nom_annular_pwr = {'X': 3,
-                        'Y': 1.3
+ tcs_nom_annular_pwr = {'X': 2.2,
+                        'Y': 1.1
                         }

CO2Y has strange drops when RS stops moving, see plot. Looks like an electronics issue?

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camilla.compton@LIGO.ORG - 15:43, Tuesday 10 January 2023 (66731)

I also ran the random walk script tcs/h1/scripts/RS_calibration/CO2X_rotation_measurement.py and CO2_RS_plot_RandomWalk.m.

Results attached. The requested angles and measured angles agree within half a degree as they have in the past: alog 26195.

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