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Size: 2104
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← Revision 3 as of 2018-04-18 09:23:31 ⇥
Size: 2186
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 9: | Line 9: |
| * There are 3 ways; | * There are 3 ways to the operation in the newt week; |
| Line 25: | Line 25: |
| * BS: Eleonora, Izumi | * BS: *Eleonora, Izumi |
| Line 35: | Line 35: |
| * IFO: Enomoto, Nakano | * IFO, ETMs, BS: Enomoto, Nakano, Izumi, Hasegawa, Shishido, Eleonora |
2018/4/18(Wed.)
* Remote participants by eZuce: None
Report of work (*:responsible person)
- VAC: *Kimura
- One of the small leak was found where it was, but another large leak seems to exist. Leak hunting will last today.
- There are 3 ways to the operation in the newt week;
Leak location will be found and fixed without vent. -> ETMX gate valve will open, no delay.
Leak location will be found and not fixed without vent. -> Vent on Wednesday and Thursday, fix leak on Friday, pump down on Friday. -> ETMX gate valve will open, delay for several days.
Leak location will not be found and not fixed. -> ETMX gate valve will not open, no delay, but it will be difficult to find beam at ETMX.
- ETMX: *Hasegawa
- TF for MM coupling of photo sensor was found.
- RMS motion seems to be OK if the mirror is not kicked. Even if the mirror is kicked, damping speed is ~10min or something.
- ETMY: *Nakano, Shishido
- Yaw dampins seems to be OK. Coupling between pitch and yaw exists. After ~10min or so, oscillation starts up to 10urad.
- IFO: *Enomoto, Izumi
- Trial lock of Michelson did not succeed because of too much motion of ETMY.
- BS: *Eleonora, Izumi
- We are optimizing diagonalization of L2P filter. Needs more time.
- DGS: *Yamamoto
- Interface card for PCIe on k1ioo was exchanged and connection between RTPC and IO chassis was established again.
Work plan (*:responsible person)
- IFO, ETMs, BS: Enomoto, Nakano, Izumi, Hasegawa, Shishido, Eleonora
- Damping, BS L2P, restoring alignment.
- VAC: *Kimura
- Identifies the location of leak.
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.