Yesterday the pre-alignment of ESQB1 optical bench has been carried out.

Fig.1 to 5 show the position of the laser tracker, placed in the SAS, and the targets installed on the bench corners as references (on a special tool h= 50 mm, further the SMR offset = 25 mm). Fig. 6 shows a plan view sketch of the bench with the position of the markers surveyed.

Tab.1 reports the result of the survey and the differences wrt the nominal positions.