I've been looking at a few things in regards to the violin ringups we've been getting from locklosses recently.
1) I looked at the ITMs OPLEVS and OSEMs motion during the locklosses and lock aquisitions comparing to before June 26/27th to see if there's more motion, but they do not seem to be experiencing more motion than they were. Example LL before June 26/27th: ITMX, ITMY and after (July 14th): ITMX, ITMY
2) I looked at the ETMs OPLEVs and OSEMs as well during LLs and aquisitions. I didn't see anything unusual during LLs but in DHARD_WFS (state 305) the ETMs always get kicked but the kicks seem a lot stronger recently?
- On 6/15 here's ETMX, and ETMY
- On 6/23 ETMX, and ETMY. Now for after June 26/27
- On July 4th heres ETMX, and ETMY
- On July 14th here's ETMX, and ETMY
3) I took some spectra a half hour into locks of the violins, one over 10 days, and another over a few weeks. The first harmonics in the 1000Hz range seem to be getting higher as time goes on and we have repeated locklosses. These templates are saved at /ligo/home/ryan.crouch/Desktop/Violin_Damping/post_06-27_violins (10 days) and ""/violins_halfhourlocked (3 weeks)
