Evan, Lisa

So, we leave the interferometer with:

• DARM on ETMX (high noise, ETMY ESD not working, please check it tomorrow), DARM boost on (engaed by hand, not in the Guardian)
• PRM, PR2, PR3, SR2, SR3, ITMX, ITMY in their final low noise state for all stages (robust, in the Guardian)
• ETMX and ETMY L2 in low noise (low noise transition not included the Guardian, mode switched back to acq in the downstate)
• SRCL gain reduced from -25 to -17 to give a UGF of 20 Hz, plus ELP100 cut off added (not included in the Guardian, so this would go back to nominal tomorrow, we just want to test if it is stable)

After all of this we saw that the range was around 20 Mpc, even without the low noise ETMY ESD, and without any MICH/SRCL feedforward, so we might indeed have made some improvement.

As far as we can tell right now, the locking sequence tomorrow should work as usual.