Betsy, Travis, Andres
This afternoon, we started the chamber closeout steps. We:
Locked the ITMX TM and CP masses in prep for FC removal.
Started to clean the barrels of the optics.
Started locking down all loose nuts on the SUS.
Set the BOSEMs to account for the buoyancy effect under vacuum.
Assisted with TCSx in chamber mirror alignment.
Prepped the N2 gun and bottle for in chamber use.
Took lots of particle counts.
Wiped down as mush of the VS and ITMx as possible.
Wiped the floors of BSC2 and 3 numerous times.
Counts were high during and just after the wiping. They did not return to zero by the time we left the chamber at 4ish. Counts data to follow.
Will wipe once more before pulling the FC tomorrow morning and putting the door on.
Particle counts during this flurry of BSC1-3 work on Wed were as follows.
Prior to anyone entering:
All zero
Spool C3 open and C3 observed to be pushing in to BSC chambers and again ~20 mins later:
0.3um 200, 180
0.5um 40, 80
1.0um 20, 30
Same C3 condition, but measured just after walking to BSC2 and measuring there:
0.3um 140
0.5um 60
1.0um 20
After wiping the BSC2 floor, same C3 open at spool, closed on BSC doors:
0.3um 1490
0.5um 570
1.0um 300
After more cleaning and work in BSCs, same C3 open at spool, closed on BSC doors, at BSC3 repeated 2x (at 90 and 120 mins of work):
0.3um 390, 520
0.5um 140, 270
1.0um 40, 140
All C3 closed at spool and BSC doors, after ~2 hours of work in BSCs, in BSC2:
0.3um 600
0.5um 350
1.0um 230