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Reports until 16:42, Tuesday 20 December 2022
H1 TCS
camilla.compton@LIGO.ORG - posted 16:42, Tuesday 20 December 2022 - last comment - 13:41, Wednesday 21 December 2022(66500)
Beam posiitons of CO2, RH, and IFO beam updated in HWS channels for ITMs.

Ibrahim and I updated and svn'ed the HWS position channels below. Prompted as Dan noticed that the CO2s could be misaligned compared to the thermalized IFO beam from Elenna's alog 66458 analysis of the ADS moving with CO2X power decrease.

The channels are from alog 65966. We mainly using Mitchell's alog 66099 code to make identifying center positions easier.

Optic ITMX ITMY
Axis X Y X Y
IFO BEAM 510 470 502 573
CO2 (annular) 502 430 451 568
Ring Heater 512 543 522 512

 

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camilla.compton@LIGO.ORG - 13:41, Wednesday 21 December 2022 (66511)

Comparing the values above to the A2L gains in alog 66171 does not make sence. Even the signs are wrong.

*BEAM POS values calculated using (IFO beam) - (RH) *0.21mm/pixel the difference in values from table above.

Pixel size * magnification= 0.012mm * 17.5 = 0.21mm/pixel
Whole CCD = 0.21mm x 1024pixels = 12.3mm => 215mm of ITM imaged

 

Spot is XXmm from the center of the optic at: FULL_POWER from A2L BEAM POS from HWS*
ITMX PIT 7.5mm -15mm
YAW 6.3mm 0.5mm
ITMY PIT 4.2mm +13mm
YAW -4.8mm -4.2mm

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