2018/4/19(Thur.)
* Remote participants by eZuce: Miyoki
Report of work (*:responsible person)
- Phase 1 operation was postponed to 4/28 start.
- VAC: *Kimura
- Large leak was found at the door on the cross tube, and started venting ~15:00. It takes almost one day to start fix the door, will be afternoon today. Pump down will start tomorrow morning.
- Leak test will be performed on Sunday morning.
- ETMX: *Hasegawa
- Transfer function of TM to BF is being investigated.
- ETMY: *Nakano, Shishido
- One of the 1.64 and 1.66 Hz peak was suppressed but other one was not. 1-2urad in yaw, 10urad in pitch.
- RMS motion at REFL port is still dominated by ETMY.
- BS: *Eleonora, Izumi
- We are optimizing diagonalization of L2P filter. Needs more time. RMS ~urad
Work plan (*:responsible person)
- IFO, ETMs, BS: Enomoto, Nakano, Izumi, Hasegawa, Shishido, Eleonora
- Damping, BS L2P, restoring alignment.
- VAC: *Kimura
- To fix large and small leaks.
Laser hazard
- [AM]
- IR: Upstream SR2-3 line, Xend 1F, Yend 1F
- Green: PR2, Xend 1F
- [PM]
- IR: Upstream SR2-3 line, Xend 1F, Yend 1F
- Green: PR2, Xend 1F
- [night]
- IR: Upstream SR2-3 line, Xend 1F, Yend 1F
- Green: PR2, Xend 1F
Weekly
- week of 4/16
- Michelson control.
- Leak check, and fix leaks.
- week of 4/23
- Opening the last gate valve.
- 4/28 Operation start