This morning we checked and tried to improve the matching of the input beam on the ITF after TCS activities and the change of the Chrocc power (see 56633).

We started from a mismatch of 1.9% in the west and 2.3 % in the north moved in total INJ L1z by 80000 steps in the backward direction, reaching 1.5 % for the west and 1.7 % for the north (see attached plot).

We could improve it further but for the moment we stop to allow the locking of the CITF.