Betsy, Camilla, Sheila, Jennie W, Keita, Robert
21:30 UTC Camilla and Betsy figuring out new way to lock diwn the OFI.
22:05 Placing peak sheet to shield ofi while they unscrew bars from FS assembly.
22:40 Took mount with bar and beam dumps still attached out of HAM5. One of the bolts for the bar was stuck in the mount so they unscrewed it chamber side.
22:42 Sheila dis-assembled FS wedge mount
Sheila left at 23:00 UTC
Camilla and Betsy taking photos and videos of damage and wiping beam dumps and mounts.
We found indium foil in the top screw hole of the mount which would sit on top of the wedge.
23:00 UTC Robert came to take photos between HAM5 and 4 from outside chamber.
23:14 Keita joined.
Lots of discussion about what to do about mounts as there was lots of the black coating in the screw holes and so Betsy and I washed the holes on the FS mount with isopropanol and she tapped the holes again.
00:10 Camilla and I put beam dumps back onto OFI.
Mount and old FS wedge covered up chamberside and cover back on.
Everyone out by 00:15 UTC.
Camilla to add pics.
Some more details and photos.
Betsy and I locked the OFI suspension the correct way, following 3.1.2, 3.3.1 and 4.2.1 of E1300056-v4. We locked the -X-Y corner and then moved the small baffle to lock the -X+Y corner. Will need to reattach this baffle when done. Left +X cornered unlocked as one had osem in the way and the suspension felt very secure with only 2 corners. Photos attached: first and second.
Photos attached of:
Videos are in the OFI googledrive:
There is photos of the FS assmebly after cleaning with the new FS installed in 79363
Almost galled one of the 1/4-20 bolts which held the Beam Dump mount bar onto the FS wedge mount during removal. Once the entire subassy was out of the chamber we worked it with isopropyl in the bolt thread joint and managed to get it out. Once totally disassembled, the 4 mount holes retapped with obvious material removal. Cleaned with isopropyl flushes.
Pictures of debris on the now removed FS wedge optic attached. We didn't attempt to remove the debris, but instead put it right in to one of the suspended optic containers to stow/ship with the other optics to CIT in case a coating measurement needs to be made and compared to specs on it as well. The debris was removed from its metal mount so I don't see why First contact wouldn't remove it from this optic surface as well.
Tagging for EPO.