The activity on ISC proceeded without issues for all the shift.
At around 8:17, under request of Fiodor, I performed the scan of the OMC in CARM_NULL_1F.
Vaccum
the vacuum team is working at the NE building at the NE cryotrap (DMS alert at 13:37 UTC).
I have looked at the OMC scan of this morning.
Figure 1 highlights the carrier order 0 to 11 modes. The order 1 and 2 mode seem to have more DARM signal, it could be that the SR RoC tuning has changed the OMC alignment offset on B5. But the second order 1 peak in that scan (see figure 3) has 4 times less DARM line signal, at similar level to what was on Saturday, so it could be just an alignment fluctuation while going over the order 1 mode.
Figure 2 correspond to the order 2 mode, compared to Saturday it has almost 4 times less power. It has 20mW in a single peak, instead of two peaks of 50mW/40mW. Is this a real impact of SR on the order 2 mode, or an effect of misalignment.
Figure 3 highlight the sideband TEM00 modes
