Leonid.Prokhorov, Jeffrey.Kissel

We measured ETMY and ETMX charge using optical levers. At both TM the charges are much lower than it was before discharging. Plots of the day and long-term are attached.

Note, that for ETMY we see the other sign of pitch and yaw response than it was in measurements of June, 12. We have not find the reason. We did the couple of measurements with Low-voltage driver instead the Hi-voltage. Sign of respose for Hi and Low voltage drivers agrees even if correlation of measured points for low voltage is very low. Dependencies of pitch and yaw on bias voltage are in attachment. 
Just in case: for all ETMX measurements signs are the same as June, 12. For ETMY the previous measurements of charge was in Jan and it gives us the 3rd combination of signs.