The door is going back on at BSC9 after having the door off for ~45 minutes.
This morning, the VE crew (Kyle, Gerardo, Bubba) held the BSC9 door open a few feet for me while I popped into the chamber and:
- Inspected the ETMx optic HR face with green flashlight - looked just as "dirty" as ~2weeks ago (lots of speckle), no obvious giant particles apparent.
- Inspected the test mass EQ stops. I found that the barrel ones were on the tighter side of the ~0.5-1mm gap setting, compared to the ERM ones which looked a tad on the looser side of the "spec". Face stops all looked good still. No stops were touching (we didn't expect to find any touching since the vent lifted the QUAD back up).
- Carefully unlocked the barrel stop nuts and adjusted the stops to be ~0.75-1.25mm for the top 4 stops and 1.25-1.75mm for the bottom 4 stops. Note, the way I gauged this was via the usual technique of "by eye". I tried to do the tap-optic-and-count-turns-of screw method on a few of them to confirm that my by-eye technique seemed calibrated. (On a 1/4-20 EQ stop screw 1.27mm of gap setting is acheived with 1 full turn of the screw, so I did 1 and a quarterish turn to get to ~1.5mm). It is impossible to use a tool on one of the top barrel stop screws (the top left), so I had to attempt to turn it a smidge with 1 finger. Carefully relocked the nuts.
- Inspected the optic HR again - still looked the same.
- Attempted to N2 dI blow (~10psi) to discharge/remove particulate - not alot of movement observed in ~1min.
- Removed tools, took a few pictures, exited chamber.
- Took quick V and P TFs - both looked healthy as expected. (ISI had to be redamped for this since I tripped it.)
- Door went on, pumpdown began, as per alogs.
Particle counts from the hand-held particla counter were 30 or under in all sized particles sampled before and after the door removal. I sampled at the door interface near the central bottom of the door opening.