[Marc, Mitsuhashi, Shalika]

We plan to use the 120 * 180 cm optical table down the stairs in TAMA to install the heterodyne WFS scheme and compare several birefringence measurements schemes.

First, we removed all the installed setups : the scatterometer optics have been placed in a box (all are for 633 nm) placed in storage room; the scattering calibration setup has been placed together with the other optics/ components of this setup; the small clean booth is now in storage room, and the u-shape optical breadboard was placed closed to the end mirror of TAMA IMC.

Then, we also brought several unused TAMA optics and mounts that are now stored in a plastic rack nearby the optical table.

We installed the laser source at the expected position (note that it starts to emit with 0.7A and we are currently using it with 0.8A that corresponds to about 72mW).We installed a QWP, HWP, a f=50mm lens and an old FI from the FDS experiment (from QIOPTIC in the FC wiki). After tuning the QWP and HWP angle we had about 93% transmissivity.

The plan will be to use the heterodyne WFS LO beam as a pick-off beam to compare the various birefringence measurement techniques while using the main laser beam path to start the cavity lock activities.