The power calibration cannot be performed today because after the turning off of the Cinogy (# 47120) a long thermal transient started. So we decided to start restoring the CH line in view of the increase of input power foreseen at the end of this week.
List of the activities on the benches:
We installed the lens of f=140mm in order to have the beam size on the CP equal to 50 mm (the same beam size of the YAG on the ITMs).
A rough centering has been done with the thermal camera by taking as reference the DAS.
We also installed the pre-amplifier on the beam sampler at the output of the laser (TCS_NI_CO2_PWRLAS).
The new threshold in the DMS has been updated accordingly.
We cleaned the bench from the biological rests of a dead mouse (see attached figure) and we removed the 'old' lens on the CH line (f=50 mm in order to have the beam size on the CP equal to 150mm).
1)installation of the nominal lens (f=140mm in order to have a beam size on the CP equal to 50 mm).
2)installation of the same pre-amplifier already installed on the NI bench at the output of the WI laser.
We will continue tomorrow morning during the maintenance.