Reports until 18:13, Monday 27 August 2018
H1 AOS (ISC)
craig.cahillane@LIGO.ORG - posted 18:13, Monday 27 August 2018 (43682)
DRIVEALIGN P2L and Y2L gains unintentionally on for PRM, MC2
When the spot position script is run on the triple suspensions, it works by driving in pitch and yaw, turning on the M3 stage DRIVEALIGN P2L and Y2L gains, and minimizing the coupling to length by adjusting this gain.
Unfortunately, the script leaves these gains on, so all of our angle controls have been feeding to length for a while now.
I turned off the M3 DRIVEALIGN angle2length gains for MC1, MC2, MC3, PR3, PR2, and PRM.  We are controlling the angles on PR2, PRM, and MC2, so each of these were coupling into LSC.

Maybe soon we can do this on purpose and reduce ASC -> LSC control noise.