Vincent left the ISIs on with their new isolation loops tonigiht. Their performace is noticably better than a few days ago at 1Hz, and the lock is quite stable. The attached plot shows 3 spectra: green is with the BSC8 ISI tripped, blue with both ISIs running their isolation loops, and red with some more SUS damping (the SUS settings suffered a setback after recent changes to the models).
Bram, Matt
The cavity is left unlocked (ISCTEY HEPA fan off) in anticipation of Hartman work starting in a few hours. The CM PDH path is off, the ETM offload path is open, and the ITM is misaligned by ~1000 counts in YAW from +554 to -500.
New blend filters were installed on the 2 ISIs (750mHz blend - less agressive than the initial ones). 250mHz low blend filters were installed on stage 1 - Y direction on BSC8 exclusively. Isolation filters of the 2 ISIs had some minor tweaks.