J. Kissel

We're still struggling to get past the Parametric Instability Phoenix (e.g. LHO aLOG 28600), so we haven't had much IFO time / patience to debug ESD bias sign flipping. As such, the charge, effective bias voltage, and actuation strength continue to change slowly. Again (see last week's report in LHO aLOG 28523), ETMX is charging about twice as fast as it has between the prior two flips, so its accumulated charge will begin to get excessive sooner than ETMY.

I'll keep pushing for a debug of the bias flipping, but we've got higher priorities with the IFO stability at the moment, and the change from charge is not out of control or ridiculous. Yet.