The attached plot shows the XEND pump down and transition to BT operation. 30 days are shown.

Over the Christmas break we operated on the main turbo only. On Jan 6 the transition to the main ion pump and 80K pumps was made.

After isolating the main turbo the beam tube valve was opened for HIFO X  work.

You can see that the the pressure has come to ~4e-8 torr in the BSC chamber (pt510). The two gauges on the 80K pump and the beam tube are both below 2e-8 torr.

In summary the transition from turbo only to final configuration has bought us slightly more than a factor of 10 improvement in pressure.

The LVEA transition is shown in this alog https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=9119

For reference, guidance related to opening to the beam tube is here: https://dcc.ligo.org/LIGO-T1300802