Calum, Kate, Rich A, Nichole, Betsy
Reporting for the team last night:
After collecting all of the required equipment, we started the ITMx First Contact cleaning at ~5pm yesterday. We used the spray cone to apply a nice coating to the CP-AR and then to the ITMx-HR. When we did the ITMx-HR we had to slide the ACB wedge part way out in order to have the ACB swing back in such a way to not interfere with the spray cone attached to the front of the QUAD structure. Reportedly there is a new cone somewhere that does not interfere with the ACB fully swung back. Will continue tracking said cone. The plan is to clean the chamber and continue with other mechanical closeout items before pulling the FC and closing the chamber door (the typical procedure).
Prior to starting the First COntacting of the ITMx-HR surface, we attached the green lantern fixture and inspected for particulate on the surface of the optic. A few weeks ago, we used the fixture to spot ~2 particles per sq. inch on this surface. Since then, much in-chamber activity has taken place. Yesterday, we spotted ~5-10 particles per sq. inch. We should inspect after we pull the FC.
The quad spray cone (LIGO-D1200490) was assembled with the old e-collar piece, which is thinner and longer than the replacement. The new e-collar would have made First Contacting the HR side of the ITM much easier.
The standard 1:1 spray mixture was prepared from brand new bottles of FC and thinner. The cone was wiped down before use. Particulate was found inside the cone after spraying (ex: photo DSCN0800).