[Steve, Koji, Gautam]

We started pumping down at ~12:15PM.

Vent finalization ~ YEND

• The table leveling was way off. This was adjusted by the balancing weight. (Attachment 1~3)
• The alignment of ETMY was not too much off. Just aligned it with the oplev spot on MEDM and this already made the green flashing.
• The Green TEM00 was maximized with ITMY and ETMY. This made the PSL IR flashing.
• The heater wires were checked. I found that one of the heater wires was touching the optical table via the cable shield. This is because the upper pins were shifted to the left side (Attachment 4&5). The pins were shifted and now all 4 cables are isolated form the table. I also checked the mutual resistance between the 4 terminals. They were measured to be isolated except two pairs that showed 4.4 Ohms and 4.0 Ohms (Attachment 6)
• The tools were removed from the chamber. The Y arm was still flashing.
• We closed the ETMY door.

Vent finalization ~ Vertex

• Found the ITMX stuck. Gautam came in and showed us his black magic to release the optic...
• This allowed us to align X arm. The green flash was found and the TEM00 flash was seen. This allowed us to see the PSL IR flash at the X end.

• PRM Refl was aligned. SRM was aligned with the oplev.
• The beam on the AS port was checked. The AS beam came out from the window.
• Closed the OMC chamber.

Pumping

• Started pumping with RP1 and RP3. (~12:15PM)