Message from GP:

Indeed we had a minor change of focusing at the beginning of 2024:

 GPS for the 1.4 GeV Standard focus

from BTY.QDE209 = 133.12 A to BTY.QDE209 = 134.27 A

from BTY.QFO210 = 140.81 A to BTY.QFO210 = 142.15 A

 HRS for the 1.4 GeV standard focus

 from BTY.QDE321 = 186.11 A to BTY.QDE321 = 188.53 A

from BTY.QFO322 = 182.74 A to BTY.QFO322 = 185.03 A

 The reason was that pre-LS2 in reality the beam was extracted from the PSB to all destinations at a E_Kin = 1.380 GeV, as it was energy matched to the PS for longitudinal considerations, and for simplicity the PSB operated with a single B program for both PS and ISOLDE destinations.

Since 2022 (post-LS2) only ISOLDE received beam at 1.4 GeV, so we could gain back this 1.3-1.4% in kinetic energy, which had to be adapted in the optics.