20210217
klog
Today's activities
Workers: Akutsu, K. Tanaka, Nakano
- As described in the above link. S-pol can be seen without resonance of IMC.
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.
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. And adjust them.
- Need to an encoder for HWP in the PSL room for the beam power calibration...
- Check where the main beam should have gone through on the viewport window on the gate valve between MCF and IFI on the design.
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.
- Confirm whether the encoder for HWP was ordered or not.