This evening as soon as Corey started his shift he found several of the violin modes were rung up (see screenshot of the darm), which is when he texted me to look into it. Most of the modes were coming down slowly with nominal settings, however I had to tweak the settings of the following two modes, the details are given below,
ITMY05/06: FM1+FM8+FM10 Gain -0.01 (will ramp it up later)
ITMY08: FM1+FM5+FM10 Gain= +0.1 (earlier I tried a phase of +60degree and that seems to be making this mode worse).
The above settings are not in the lscparams yet, will test them out for few locks.
The latest settings for IY05/06 worked fine (both narrow and broad filters shows the mode is decreasing) all night as shown in the screenshot attached below. The decline was slow, hence the gain needs to be increased.
However, when I applied the same setting this morning (after IFO rel-ocked) then I was not very sure about the above settings still working (Iy05 increasing and IY06 decreasing- see ndscope plot here). Hence, I need to keep on eye on this and if required further tweak the phase/gain.
