Today's activities:
- In order to advance further safely, the instrument air system needed to be fixed, at least temporarily, but reliably. Currently the Kobelco compressor is being used as an instrument air compressor, for details, see aLog: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=79512
- The HAM6 turbo was started up with its designated backing cart. This cart needs instrument air, as one if its safety valves is pneumatic. This turbo was running for 2-3 hours before it was valved in, to eliminate any potential risks with the inst. air
- The HAM6 turbo was valved in at ~12:50. The pressure immediately went down in HAM6 by 2E-6 Torr, and in the corner in general by 5E-7 Torr
- The HAM5/HAM6 annulus system pumpdown continued. The Annulus Ion Pumps have been also switched on, and after some struggle they came alive. The pumping carts are still there though, they are at <1E-5 Torr
- As HAM7 caught up with the relay tube, the pumping of the relay tube was stopped, and it was valved together with HAM7 (RV-2 open)
- The rebuilt HAM6 RGA is being pumped, before it will be baked out, starting with next Monday. A pumping cart has been brought from the FCES for this purpose

The pressures currently:
- Corner (at BSC3): 4.3E-6 Torr
- HAM6: 5.8E-6 Torr
- HAM7: 5.9E-7 Torr
- Relay tube: 6.5E-7