(Jeremy B, Jeff B, Andreas, Matt H)

Jeremy and I went in and bolted the baffles back onto the PR3 structure, put the ballfe back in front of PRM, and put all the EQ stops that we had to take off to first contact back on the small triples. We also clipped off the peek ends on the cable ties to try to reduce the peek load in that chamber.

Whilst doing this Jeff and Andreas checked the PRM grounding issue (I think they said they thought it was clear..will have to check) and also put on the 4" witness plate holder and the 1" optic (both are by PRM to stay out of the way of beams).

Seeing as SEI were still balancing in BSC1, Jeff went off to deep clean BSC3 and Jeremy and I deep cleaned HAM2. That way all the particles we stir up in both chambers can settle over lunch and we can in theory put doors back on HAM3 after lunch. We vacuumed/wiped in bellows, around the septum, around the septum viewports, in and around the support tubes, under the ISI, on stage zero of the ISI, on the ISI table top, in and around the small optics, on the suspension structures. So the deep clean for this chamber should also now be done. We should give it a quick once over again before we removed FC, but to get that deep clean out the way is good.

Also the cleaners after we cleaned inside the chamber, very kindly cleaned inside the cleanroom in HAM2....and also inside the cleanroom in HAM3 in preparation of the doors going on this afternoon (on HAM3 I mean). They said they saw stuff come up so was a good idea to get it cleaned. They will also clean inside HAM2 cleanroom in the morning

SEI should now be good to go ahead and balance. Reminder, HXTS triples locked on intermediate and lower stages, upper stage unlocked and so are the HAM AUXs

Particle counts:

In HAM2 cleanroom before start work

All counts zero

IN HAM2 chamber start of work

0.3um...30 counts

0.5um...20 counts

0.7um....20 counts

1.0um..10 counts

rest zero

In HAM2 after everything put back but before cleaning

(Cant remember numbers but I think the counts was in the teens for 0.3um, and 7 for 0.5um..thats what I seem to recall thats what Jeff B said)

In HAM2 after cleaning

0.3um....410 counts

0.5um....210 counts

0.7um....150 counts

1.0um....130 counts

2.0um....90 counts

5.0um...20 counts

So we definiitely stirred stuff up cleaning and I b elieve made the right call to clean this chamber now before pull FC this afternoon to allow everything to settle.

Uploaded a couple pics if people interested in temp/humidity