Aso, Matteo, Nishino

Abstract:

We aligned OMMT1 and 2 to introduce IR in the OFI and OMC. The beam position on OFI is almost centered, but those on OMC's QPDs are slightly shifted up in pitch directions.

Since we couldn't finalize the position due to the earthquake which made the main arm alignment bad, we will do it tomorrow.

In addition, we measured the beam profile of the transmission from the OSTM. We couldn't finish checking the weist position, so it is also what to be done tomorrow.

Details:

Beam position on the QPD1 of OMC

It was slightly shifted up to pitch direction. See the attached video

Beam profiles

The width distribution is shown in the attached figure.

The designed beam waist size is 0.422 mm, 3.65+17.85=21.5 cm away from the OBS1. 

All the data is available here