Since the power on the phase camera was very low, M. Tacca asked me to align the reference beam. So, I went to the LL and with the two mirrors in front of the phase camera pick-off in fiber I tried to align the beam around 12.30h LT. For the alignment, I took as reference the channel EPRB_B4_PC_CAR_PWR and the corresponding camera image. The alignment is not easily done since the mirrors are difficult to reach by hand, but some improvement could be done as shown in the attached image.