Turns out that my PM1 investigation (drop in bosem counts by 20%, as reported in 89017) was totally unnecessary and this was due to the coil driver swap in Dec 2025 (LHO alog 88998) and I had totally forgotten about it.
Long story short - this afternoon I went into HAM1 chamber and re-attached the BOSEMs, connected the cables, centered the flags and re-attached the beam dump behind it. I re-took the open light counts, applied the offsets and the gain for PM1 (see screenshot attached). I have accepted the new settings in the SDF (safe).
Latest OLC for PM1 are as follows,
| UL | 20800 |
| LL | 23100 |
| UR | 19100 |
| LR | 23200 |
Healths checks on PM1 is still ongoing (chamber side measurements shows peaks are in the right place, magnitude is off so we are looking into the new Coil Driver and if everything is consistent or not digitally), will post plots as soon I am able to process them.
