We run operational tests on SPS Main Dipoles from 2025-05-16.
RBAC token renewal is working, but trimming was killed at 1 am on Sunday 2025-05-18 due to “ringing” in the hysteresis compensation due to filtering of the .
https://logbook.cern.ch/elogbook-server/GET/showEventInLogbook/4295154 https://logbook.cern.ch/elogbook-server/GET/showEventInLogbook/4295155
We see in LSA the BHYS correction going +/- 0.015 T, which translates to some +/- 50 A at 50 Hz (prediction frequency) caused by the TV smoothing.
We fix this by disabling the smoothing and setting a hard limit on the corrections. The corrections in are set to on the programmed field.