Gerardo, Travis, Randy, Janos

Today we executed WP 12595, reventing, troubleshooting, closing, and re-pumping HAM1. The times of the operations are approximate.

08:00 - 08:30: GV1 and GV2 large gate valves have been closed. HAM1 turbo and Ion pump (IP13) have been valved out. The annulus IPs have been switched off, the annulus volume has been vented. Also, IP3 was valved in to the corner, after the successful troubleshooting yesterday (see aLog 84826).
08:40 - 09:53: The chamber was vented with bottled Nitrogen. Approximately 2 full bottles were needed. Only metallic parts were used between the venting port and the bottle (no plastic tubes), and the tube was flushed with Nitrogen beforehand.
10:00 - 10:40: The Y+ door has been taken off. The O-rings have been inspected, then removed. A human hair was found at 6:30 o'clock, and a little piece of white tape was found in the O-ring's groove at 8:00 o'clock, and overall, the O-rings and grooves were substantially dirty. Pictures about these in the comments. Also, the cleanroom was needed to be moved Y+ direction, to give enough room for the forklift.
10:40 - 11:40: Chamber work. During this time, Randy stayed with the forklift, so the door was hanging from it all the time, and inside the cleanroom.
11:45 - 13:30: O-ring installation: it took a few tries, but both O-rings were installed nicely. Then, installing back the door: smooth process, with shoving it in as the last step, to avoid the O-rings falling out.
13:20 - 13:50: Pumping of the annulus systems, and roughing the chamber. The HAM1 side annulus needed ~10 mins to go below the pressure it reached in the last 2 weeks, so the troubleshooting was very successful! The roughdown goes well, too.
16:15 - 16:45: Transitioning to turbo