[Anchal, Paco, Ian]

Clean room etiquettes

• Two people in coverall suits, head covers, masks and AccuTech ultra clean gloves.
• One person in just booties to interact with outside "dirty" world.
• Anything that comes in chamber, first cleaned outside with clean cloth and IPA. Then cleaned by the "clean" folks. We followed this for allen keys, camera and beam finder card.
• Once the chamber cover has been removed, cover the annulus with donut. We forgot to do this :(

Optics removal and changes

We removed the following optics from the BSC table and stored them in X-end flowbench with fan on. See attachment 1 and 2.

1. IPPOS SM2
2. GRX SM2
3. PRM OL1
4. PRMOL4
5. IPPOS SM3
6. IPANG SM1
7. PRM OL2
8. Unidentified optic inbetween IPPOS45P and IPPOS SM3
9. Beam block behing PR3
10. Beam block behind GR PBS
11. GR PBS
12. GRPERI1L (Periscope)
13. PRMOL3
14. IPPOS45P
15. Cylindrical counterweight on North-west end of table.
16. Cheap rectangular mirror on South west end of table (probably used for some camera, but not in use anymore)
17. IPANGSM2

We also changed the direction of clamp of MMT1 to move it away from the center of the able (where PRM will be placed)

We screwed in the earthquake stops on PRM and BS from front face and top.

We unscrewed the cable post for BS and PRM oplevs and loved it in between SR3 and BS and screwed it lightly.

We moved the PRM, turned it anti-clockwise 90 degrees and brought it in between TT2 and BS. Now there is a clear line of sight between TT2 and PR2 on ITMY table.

Some next steps:

• We align the input beam to TT2 by opening the "Injection Chamber" (formerly known as OMC chamber). While doing so, we'll clear unwanted optics from this table as well.
• We open ITMX chamber, clear some POP optics. If SOS are ready, we would replace PR2 with SOS and put it in a new position.
• Then we'll replace PR3 with an SOS and align the beam to BS.

These are next few days of work. We need atleast one SOS ready by Thursday.

Photos after today's work: https://photos.app.goo.gl/EE7Mvhw5CjgZrQpG6