This morning the activity has been focused on recovering the alignment of the arms. We managed to recover the alignment of the North arm and to lock it so far.

The first thing we did was to center the beam on the NE mirror by using the markers. It was necessary to adjust the vertical position of the PR mirror by 450um, which is quite a lot. Then for the mirrors, the drift was of the order of 20-25 urad.

During the shift Romain has helped us to align the SNEB bench and the SPRB one.

The afternoon team has started to work on the alignment of the west cavity.