PSL/IOO jitter coupling is high, so, as a first step, we adjusted offsets on IMC_DOF_1(2)_P(Y). We adjusted offsets to minimize peaks in DARM from a 290Hz pitch (1500 counts), and a 310 Hz yaw (390 counts) injection, made using the piezo mirror on the PSL table. The second loop of the ISS was off, and we were at 20 W. This was a first rough alignment (the offsets were at 0). Only DOF_2_P and DOF_1_Y seemed to have much effect. The figure shows that we improved jitter coupling by a factor of 3 or 4 in both pitch and yaw, with the best improvement in pitch. Next we will adjust the ISS array picomotors.

The proposed settings change follows:

IMC_DOF_1_P, was: 0, proposed: 0

IMC_DOF_2_P, was: 0, proposed: -100

IMC_DOF_1_Y, was: 0, proposed: 50

IMC_DOF_2_Y, was: 0, proposed: 0

Robert, Kiwamu