[Matteo, Hirata, Haoyu]

Continuation of klog #20086.

After IR was back on POP with good alignment, we continued the installation of optics for forward beam QPDs. First we corrected the position of periscope and already installed mirror to minimize overlap with other optics, still the space is very tight. Then we added additional mirror up to the lens position and measured the beam in the position in which the lens should be installed. The beam shape is in the attached picture and the beam size is as follow:
Width x: 4.890 mm
Width y: 4.349 mm

The beam is very well collimated.