J. Oberling, R. Crouch

Yesterday we measured the initial position of the BBSS in the WBSC2 chamber, results shown in the 1st picture.  Our goal is to match the position deviations we had on the test stand for the BBS SUS cage, as that was the SUS cage position we aligned the BBS optic with; all alignment moves after the SUS cage were positioned were done with the SUS chain itself, the cage did not move again, so matching the cage deviations should correctly position the BBS optic.  As a reminder, the test stand deviations are shown in the 2nd attachment.

Based on this we will move the cartridge assembly with HEPI by approximately +2.5 mm along the X axis, +0.5 mm along the Y axis, and a CW rotation of ~500 µrad.