TITLE: 07/08 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 21mph Gusts, 15mph 3min avg
    Primary useism: 0.07 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

IFO is in DOWN and MAINTENANCE

We have so far been unable to recover lock after maintenance. While we've had roughly 2 hours cumulative of Earthquake-caused lock interference.

We can't lock because there seems to be a strange 1Hz oscillation, thought to be related to the L2 to R0 damping that we have on the ITMs. The sat-amps for these were swithced out today in an attempt to ameliorate the issue, but we don't know if this worked.

Right now, Oli, Jeff and Elenna are taking measurements of the relevant channels in an effort to better understand what's going on with these.

Violins are huge because of morning ITM and ETM measurements from this morning and evening. They are off the screen so we foresee a long damping session tonight (if lucky).