Aggregator
QuickPic - Hall D -> 300nA on 4.5x10-4 Al 40um
iCalibrate: Hall D
QuickPic - Hall C: 30uA -> 50uA
Hall C -> Copper 6% at 30uA
AutoLog - UNMasking Hall C Normal Target
iCalibrate: Hall C
AutoLog - Masking Hall C Normal Target
Swapped trim for MDB2L27H (2x)
Voltage on this trim (SL27B18 ch 9) had become quite noisy over the last few days. We suspected it was contributing to the position oscillations and swapped the trim card. First swap showed minimal to no improvement in voltage stability, second swap looked a lot better. Fig 1 shows the condition degrading, fig 2 zooms in on the two swaps.
I've red-tagged the two cards I swapped out, though I don't know if they have anything "wrong" with them other than they don't like to play nice with the MDBs, which I can't really blame them for.
Downtime Incident CLOSED: Swapping MDB2L27H
MDB2L27H suspect for Hall B's position oscillation
After recovering beam to Hall B, Hall B staff noted their positions were oscillating more than before. We can see the same movement in the 2E02 x-position and in the energy locks in the SL, both 2L20 with FFB on and 2L19 with it off. We will try to swap the card and see if that helps, but if not, we will run like this and continue looking for what is the cause.
2L18 Recovered
HV did not come back right away. I went out to check for a breaker trip but found nothing out of the ordinary. The Comms screen off of the zone Combo screen was showing an AUXP fault. Tried clearing faults and bringing HV back one more time. Success. Zone recovered without issue after that.
Downtime Incident CLOSED: 2L18 dropped HV
Downtime Incident CREATED: Swapping MDB2L27H
2L18 aux power supply fault
Downtime Incident CREATED: 2L18 dropped HV
Adjusted HallBCLAS12Orb lock parameters
Reduced fudge factor from 0.25 -> 0.1 and restored period from 3 -> 5 to try and get position oscillations under control. It's for sure coming from upstream, I'm just trying to prevent the lock from overcorrecting and making it worse. No difference so far; I'm going to keep poking around.










