|
Size: 2719
Comment:
|
Size: 2896
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 4: | Line 4: |
| * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15987]] | |
| Line 26: | Line 27: |
| * Check the oplev beam spots on the mirrors! At least on MCe, the beam is just illuminating the wire break at the -X side. |
20210210
klog
Today's activities
Workers: Akutsu, K. Tanaka, Nakano
- As described in the above link.
- PMC was stable today. The treatment yesterday by Nakano should be effective.
Next plan
- Wash some screws.
- Have VIS to modify the MCo connector.
- Have VIS to check whether the birndy connectors on the suspension structures are loose or not; at leaast, that for MCe is loose.
- Have VIS to consider how to tame/fix the electric wires from the coil actuators so that they won't cross the laser beams.
- Have VIS to check whether every combination of the coil and magnet axes is centered.
- Check the ghost beams.
Trial; detach once the beam dump at +X of MCo to see where the ghost beam will illuminate. -> Actually, as described in the klog post above, the ghost beam goes through htee side of the beam dump!! OMG!
Maybe the most difficult is to align POM1. We need to open the beam path to PRM (so KOACH must be arranged) and PRM must be controllable. Several conditions should be met. -> But now we can use S-pol beam through MCo??
Consider how to separate the beam dumps from the main beam as well as install them. --> Using grid structure?? AmiAmi.
- And revise the beam dump document. Determine if we need to replace some of KG5 glass plates with SiC ones or not... to deal with occasional illumination...
Where to put the dumps for GBs "N", "K", "f", and "a" (see here for the identification). -> At least, "a" can be dumped at the position well separated from the main beam.
- How to install the dumps; maybe anyway we need to detach the K400 flange (with viewport windows) to access there.
Oplev light source holders are old now. Should be replaced with the newer version.
- How to install the beam dump around MCe... it was hard to see the MCe transmission beam even during flashing although we used P-pol.
- Due to not calibrated actuators, it was hard to know how much counts to be input into the coils during the alignment work to flash IMC. Need to say this to VIS. Calibration!
- Check the oplev beam spots on the mirrors! At least on MCe, the beam is just illuminating the wire break at the -X side.
Wanted!
- 2 metal rack shelves in the clean booth (each for MCF and MCE); the height must be lower than 180 cm due to lower ceiling of the relevant clean booths.
- 1 sticky mat to get the dirt off our feet.
- 3 oplev new holders (KM100T). Need to check where they are.
Where SiC plates??? Kokeyama-san informed me the place by e-mails on 2020 July 15-17. -> Found them. On a metal rack in the PSL preparation area.