Naoki, Daniel, Camilla, Nutsinee

Today we improved the green mode matching from 71% to 92%. We moved FC2, FC1 in pitch and yaw until we were left with mostly second order mode. To fix the mode mismatch we adjusted PSAM on ZM2. We went from 100V offset to 129V. This corresponded to 4.03V and 4.52V on strain guage monitor. Every once in a while adjustments to pitch and yaw was required. We were able to reduce the power on the second order mode (the donut mode) from 20% down to 9%. It's unfortunate that this mode seems to be sitting right on top of the sidebands, causing innitial confusions. It's not until the very end of the exercise that we realized there were no DQ channels on FC trans and REFL so we didn't record the initial second order mode height carefully to quantify how much PSAM improved our mode matching. The number mentioned came from me eye-balling higher order mode counts from the screenshot pre and post PSAM adjustment.

The green sideband (40MHz) power accounts for 30% of the 00 mode. Excluding that the filter cavity is now ~92% mode matched in green. We didn't optimize any further as the alignment will likely change again for the red. Hope this alignment put us in a good starting place. 

Camilla accepted the changes made to FC1, FC2, ZM2 alignment and PSAM Volt offset in the SDF.