Attached below are the results for this month's OPLEV charge measurements performed on ETMX and ETMY.

The effective bias voltage on the ETMX is around 50V and 60V for pitch and Yaw respectively, for the 1st quadrant. These values have reduced from last months measurements. The bias voltage in other quadrants haven't changed much and are within acceptable values (i.e. 50V).

For the ETMY, the effective bias voltage on all 3 quadrant for both pitch and yaw are within acceptable values. There charge accumulation in the last one month is not significant.

After the measurements we complete, the sliders values were restored and SDF differences were removed.