J. Kissel

As instructed (see LHO aLOG 35977), Nutsinee and Corey reconfigured the ETM ESD systems in such a way that I thought might help mitigate charge accumulation while we're venting essentially immediately after we intentionally broke lock on May 8th 2017 at ~15:15 UTC. 

I've measured charge today, hoping to see a noticeable improvement, if not at least a change in the trend. 

For ETMX: We a change in the charge accumulation, if not an improvement. GOOD!

for ETMY: We do not see a noticeable charge in the accumulation rate... yet! The optical lever's report of rotational actuation strength shows the effective bias voltage continues to trend negative. HOWEVER, don't yet be discouraged: historically, when we flip the bias voltage, the first data point is confusing. One needs several weeks worth of trend to confirm an accumulation rate and direction.

Assuming the IFO is still down, we may take another measurement on Friday to help fill out the data set, to make sure we're doing the right thing.