2018/4/17(Tue.)
* Remote participants by eZuce: None
Report of work (*:responsible person)
- VAC: *Kimura
- Large leak was found but it is not identified where it is. Currently Vacuum level is 200Pa, but it should be around 0.1Pa if no leaks.
- ETMX: *Hasegawa
- Damping for yaw woks somehow and RMS is ~0.2urad.
- A very high Q peak was found on pitch and it takes several hours to be calm. This high Q seems to be Sphere parts.
- ETMY: :Miyamoto, Shishido
- No progress for damping.
- ETMY: *Okutomi
- ETMY TF was measured. Not only 2 but all F1, F2, F3 seem to be locked. Moving FR may fix the lock.
- DGS: *Yamamoto
- IO chassis of k1ioo was disconnected somehow.
Work plan (*:responsible person)
- IFO: Enomoto, Nakano
- Damping, BS L2P, restoring alignment.
- VAC: *Kimura
- Identifies the location of leak.
- VAC: *Inoue
- Vacuum gage for wide area will be installed.
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.
- Opening the last gate valve.
- week of 4/23
- Operation
Issues
- Large leak was found but it is not identified where it is.
- IO chassis of k1ioo was disconnected somehow.
- A very high Q peak was found on pitch and it takes several hours to be calm. This high Q seems to be Sphere parts.
- ETMY TF was measured. Not only 2 but all F1, F2, F3 seem to be locked. Moving FR may fix the lock.