georgia.mansell@LIGO.ORG - posted 18:40, Thursday 14 April 2022 - last comment - 10:54, Wednesday 20 April 2022(62630)
Overnight CO2 Y annular test
I've set a script to run on ZOTWS26 to set the ITMY CO2 power to 2 W for one hour with the annular mask on. Starting at 03:32:11 UTC (8:30 pm PDT).
Some HWS images from this CO2 test. Attached image is showing the self heating OPD from the start of the lock up until the CO2 is swtiched on, then OPD from the CO2Y switch on to now. It does not look like CO2Y is cented on the IFO beam.
Turning on the common CO2 was Not Great for the buildups (RF18 sad, refl drop, small pr gain decrease), though perhaps this is because of the misalignment between the CO2 and the IFO beam.
Can we keep the wavefront color axis range fixed for these animations?
I've moved the CO2Y beam closer to the IFO beam, see alog62701. We can probably still do more fine alignment.