[Yuhang and EleonoraP]

First we aligned the green beam before PR chamber.

Then we changed the stage of Faraday Isolator with a smaller one, in order to make space for the wind shields. We put some schotch to cover the borders of the FI, to avoid damages (fig 1).

We found a problem: not enough space for the mirror under the FI (fig 2). The black plastic edge of the mirror mount is 3.4mm while the beam reflected by the FI crystal is 5 mm far from the stage edge (fig 3).

Possible solutions:

1. make a hole in the mount in order to make space for the mirror. Size of the hole: 30 mm (diameter) and 12 mm (depth) in fig 4.

2. build a different stage with other components, in fig 5.