Yesterday we observed an other strange increase of the Range
the interesting thing is that is correlated with the inverse of the power on B1p, as for the event of the 20th of Jun. See figure 1 and 2. this time no correlation with a kick on SR tx.
to be understood.
also the B4 12MHz show a correlation with the range. Moreover also the coupling of frequency noise has a strong correlation with the BNS, but in a strange way... the higher is the coupling the better is the range (figure 2 and 3). The origin of the trend has not be found yet
I extended the analysis of the BNS range fluctuations over the past two days to include all _mean and _rms channels from the trend frames (~15k in total). The most correlated channels are those related to B5, i.e., the beam at the dark port before the Output Mode Cleaner. This is probably not informative.
Other notable channels include: V1:Sc_BS_CMRF, the control of the Common Mode Rejection Factor at the Beam Splitter, and V1:Sa_WI_F0_ACC_X, the X-axis acceleration at Filter 0 of the West Input.
Attached:
and a few plots of the most correlated channels.
