Michimura, Ushiba, Tanaka

We lowered the upper mirror of the periscope to solve the clipping the beam at the mirror.  Fig. 1 shows the result. The beam itself became able to be seen so the beam seems not to be clipped at the mirror.

Then, we found that the beam height in beam path seems to be lower than the nominal height in this state. So we lefted up the lower mirror position of the periscope to adjust the beam height.. 

After that, we realigned the OMC REFL beam path.

Also, we tried to dump one of the ghosts from LNS3 which hit on the 2-inch mirror holder after HWP3 (fig.2) but we could not find the optimal position for a beam dumper to dump the beam. We gave up to dump this today.