M. Todd, C. Compton, S. Dwyer

I followed the steps layed out in alog 87316, and ran into OM suspension saturations before getting to start my measurement. I turned off the centering loops and cleared the integrators (you have to turn off OMC ASC and hit graceful clear history as well). Then turning them back on they seemed fine. I turned on the OMC ASC and set the LSC offset appropriately and then went out and turned off the sidebands.

We took scans for ITMX and ITMY about 25 minutes after the unlock, so we call this the HOT-ish (tepid) scan with CO2s on.

We then waited an hour with the ITMs realigned so that the HWS could track the defocus before taking another set of OMC scans.

We then turned the CO2s off and left the HWS aligned to watch the defocus change from them. ITMX HWS did not show a lot of change so upon examination it seems the SLED source is either dying or the CO2 is misaligned. TJ and Camilla are working on replacing the source to see if that will remedy things.

After an hour with the CO2s off we repeated the scans for each test mass for the final measurements.

Analysis will follow in a comment but I've attached the DTT screenshot below.