[JenneD, SudarshanK]

We  lowered the ASC DHARD Pitch Gain to see if we can actually stay locked with smaller gain. We lowered the gain by a factor of 3 (from -30 to -10). The interferometer happily stayed locked but we didnot notice any significant change in the DARM spectrum (Attachment 1). During this time, the purge air/Kobelco was turned on as part of Tuesday maintenance, which might elevate the DARM noise floor but should be similar throughout our study. 

We also made noise injections at these two configurations via DHARD_P_EXC. The sensor corrections was turned off during one of those injections but we didnot see much difference between the two.

At next comissioning opportunity, we will probably try to measure sensing function at the lower gain value because we expect the sensing function to  change (move towards "normal") with lower gain.