[JC, Yuta]
We did a quick health check of suspesions after the pump down.
Summary:
- ITMX LRSEN is too bright (~761) and not responding to any optic motions (we knew this before the pump down)
- ITMY ULCOIL is not working
- LO1 LLCOIL is not working
- Damping loops need to be retuned, especially for ETMY (too much damping), SRM, PR3 and AS4 (damping too weak)
- MC1 sensor outputs are minus instead of plus
- LO2 OSEMs got stuck during the pump down, but now it is free after some kicks. OSEM sensorr values almost came back (see attached)
What we did:
1. Kicked optics with C1:SUS-{optic}_{UL,LL,UR,LR,SD}COIL_OFFSET one by one with offsets of +/- 10000 (or 100000), and checked if C1:SUS-{optic}_{UL,LL,UR,LR,SD}SEN_OUT16 move in both directions.
2. Check if the optic damps nicely.
3. Attached photo of the note is the result. |