13:10-13:40UTC. Adjusted ZM4 PSAMs to 2 different settings this morning as LLO started an extended maintenance period.

Only adjusted ZM4 PSAMs as ZM5 seems to have more effect but is harder to realign after, last large raster in 76986.

In each of the two steps, I adjusted the PSAMS offset, used alignment sliders to bring the alignment back, ran scan sqz alignment. 

• Started with ZM4 PSAM strain voltage at 9.0V
• Tried 9.75V: plot squeezing looked bad and not flat (can't optimize low freq yellow BRLMs at the same time as high frequency blue BLRMS)
• Tried 7.5V: plot squeezing looked good and flatter here 4-4.5dB squeezing, range increased from original settings to 152MPc plot (but we hadn't recently optimized in the original settings). 
  • Leaving PSAMs and ZM alignment in this configuration. Can revert during maintenance if we want. 
  • Good SQZ time for 5 minutes: 1403357710 (2024/06/25 13:34:52 UTC) to IFO unlocked 1403358016 (2024/06/25 13:39:58 UTC).