[K. Nagano, K. Tanaka, Sugimoto, Michimura, Akutsu]

We started to install TMSY GPT for green path following the design.
So far, we have installed two periscope mirrors (fig. 1), GST1 and 2 (fig. 2, and 3), and GLENS (fig. 4).
The beam height above the optical table is 4 inch.
Note that the lens position was no adjusted since we did not have arm cavity and current beam mode could not be expected one. 
Then the temporary PD (PDA100A2) was installed after GST2 to monitor the green transmission of ETMY.
In front of the PD, a lens tube (~5 cm) was installed to reduce ambient light.
The PD's gain was set to be 50 dB.
You can see its signal in IOP channel, K1:IOP-EY0_MADC0_CH9.
The final situation was shown in figure 5.
We left LED light off in EYT booth.
Tomorrow, we will continue the installation of GPT.

Other thing:
- We took 3 whitening filters with DC power (8661, 8657, 8658) and a BNC-Dsub converter (9547) from Mozumi ofiice.
   - Only BNC-Dsub convert was mounted.
- We took 4 IR mirrors (PYD-10) from PSL pre-room.