WP 6077

Koji, Stefan, Kiwamu,

Today we put the ISCT6 table back into the final position, connected the light pipes and re-aligned the optics in the enclosure. The table is ready for locking.

[some details]

The table was put back in to the position where the table was before the vent with an eye-ball precision of a few mm. The table legs were subsequently secured to the ground, and the light pipes were connected to the view ports. In a single-bounce configuration, we were able to realign the optics on the table. The ASAIR beam was a bit off horizontally from the center by 1/4 inch or so at the upper periscope mirror, but since this is a 2" mirror, we decided not to improve it. We steered this mirror to fix misalignment in the downstream.

In contrast, OMC_R and _T paths needed the periscopes to move. For OMC_R, we shifted the entire periscope structure and all the optics by about 2". The beam coming out of the viewport was too high by an inch or so, so we slid the upper periscope mirror up. As for the OMC_T path, the periscope was shifted by an inch. The upper periscope was also moved up by an inch or so. We confirmed that the alignment of all the cameras are good.