Continuing on from Jenne's observation that there are still glitches in the new NPRO, I've tried to make a plot we can use to compare the glitch rate in the new and old NPROs, using the NPRO_PWR channel instead of the FSS channel which isn't available for the new NPRO.
I've used a 3 hour stretch of observing time for the old NPRO, and a three hour stretch before the time when Jenne made a plot in 80837. The ISS is not on for the new NPRO time, which is probably why the intensity is flcutuating and making it harder to see the small steps in power that are the glitches we are looking for. In the second panel, I've plotted the data high passed with a 0.05 Hz butterworth, this helps to show the glitches, although not perfectly (in either case). Based on this, the glitches look to be happening at a roughly similar rate, although somewhat less with the new NPRO.
This script in in sheila.dwyer/DutyCycle)4/dutycycleplots/PSL_glitches.py
Attaching another plot, showing that comparing our old NPRO to LLO during an observing stretch that started at midnight UTC time on Oct7th, LLO has no similar glitches.
Here's the same plot, but using a time from last night when the PSL environmental controls were off. There are still gltiches, but fewer.
These plot tiles show runs of Sheila's code looking for PSL power glitches on several days before / after the suspect date around Sept 12.
There's not a clear correlation between the glitches and locklosses. While maybe there's more glitches after Sept 12 (bottom row), the glitches don't consistently correlate with locklosses? Sept 14 is a good example of this: lots of glitches, the IFO stays locked through many of them.
2nd plot here shows overnight again with the swapped new laser. There are still glitches (though potentially less).
The PSL-PWR_NPRO_OUT_DQ channel seems to not be connected at LLO, which explains why the comparison plot a few comments above makes it look like L1 PSL is so much quieter than H1.
Adding screenshot of the NPRO power glitches over the past day. There are still glitches with the new laser -- not all glitches correspond to locklosses, but some do.
