Using the lockloss page, I picked out some times when the tag "IMC" or "FSS_OSSCILATION" was triggered. Then, I just made some simple time series comparison plots between several PSL channels and PSL PEM channels. In particular, the PSL channels I used were:
H1:PSL-FSS_FAST_MON_OUT_DQ, H1:PSL-FSS_TPD_DC_OUT_DQ, H1:IMC-MC2_TRANS_SUM_IN1_DQ, H1:PSL-PWR_NPRO_OUT_DQ, H1:PSL-PMC_MIXER_OUT_DQ, H1:PSL-PMC_HV_MON_OUT_DQ. I compared those to the following PSL PEM channels:
H1:PEM-CS_ACC_PSL_PERISCOPE_X_DQ, H1:PEM-CS_ACC_PSL_PERISCOPE_Y_DQ, H1:PEM-CS_ACC_PSL_TABLE1_X_DQ, H1:PEM-CS_ACC_PSL_TABLE1_Y_DQ, H1:PEM-CS_ACC_PSL_TABLE1_Z_DQ, H1:PEM-CS_ACC_PSL_TABLE2_Z_DQ, H1:PEM-CS_MIC_PSL_CENTER_DQ. For this analysis, I've only looked at 3 time periods but will do more. Below are some things I've seen so far:
- I definitely do see correlations between the IMC/FSS (IMC_MC2_TRANS & FSS_FAST_MON) channels and the PEM PSL sensors. In particular, it seems like the most consistent correlations are with the PSL_PERISCOPE_X/Y and PSL_TABLE1_X/Y/Z channels. In some cases, there was a visible glitch in PSL_TABLE2_Z, but the amplitude is much less than in the other PEM channels.
- Some PEM glitches correlate with the glitching in PMC_HV_MON, but this was only the case for 2 of the 3 times I looked at.
- Some PEM glitches correlate with PMC_MIXER, but I wonder if that is just a coincidence (see slide 9 for an example)
- I have seen no obvious correlation with the PEM PSL sensor glitches and the NPRO_PWR channel.
From my very limited dataset so far, it seems like the most interesting area is where the PSL_PERISCOPE_X/Y and PSL_TABLE1_X/Y/Z channels are located.
For the same 3 time periods, I checked if the temporary magnetometer H1:PEM-CS_ADC_5_18_2K_OUT_DQ witnessed any glitches that correlate with the IMC/FSS/PMC channels. Attached are some more time series plots of this. During the time period on September 13th, I do not see anything interesting in the magnetometer. However, during the other two periods in November I do see a glitch that correlates with these channels. The amplitude of the glitch isn't very high (not as high as what is witnessed by the periscope_x/y and table1_x/y/z channels), but it is still there. Like in the original slides posted, I don't see any correlations with the PWR_NPRO channel with any glitches in the pem channels on any of the days.