Jenne, Georgia, Sheila
After yesterday's peak down the X arm, we worked on locking the vertex with our ITMX and input beam pointing set by the X arm.
We started with locking PRX+PRY, this worked fine, the refl spot is low and to the left on the REFL camera. We had to make some guardian adjustments throughout the day in places where we were using ASAIR sensors.
With PRX+PRY locked, we walked the RM alignments until they were close enough that we could turn on the REFL WFS centering loops.
We aligned MICH by moving ITMY, then later adjusted the beam splitter. We were able to lock MICH using the ASC_AS_B_RF45 sum, to do so we needed to flip the sign. We also reduced the gain setting by a factor of 2.
We locked PRMI without any problems, and adjusted the alignment by hand.
We then set the SR3 alignment for the new beam by feeding AS_C centering back to SR2 and moving SR3 until we started to loose power on AS_C_SUM. We set SR2 to center on AS_C, and searched for the SRM alignment that gave us SRY flashes. We were able to lock SRY using the new AS45 sensor, with a sign flip and no gain adjustment.
We locked DRMI, the only things that were different from the guardian default settings was that we reduced the MICH trigger from 20 to 7, and we have 3.3W into the IMC. We weren't able to turn on ASC but we will come back to that tomorrow.
With the new alignment, Sheila and I checked that we could resonate beam in the OMC. With DRMI locked, we turned the PSL injected power down until we had only a few mW in HAM6 (as measured by AS_C). Then we realigned OM3 and were able to turn on the regular OMC ASC loops (the centering loops for the AS WFS were already on). We ended up not getting the OMC to lock, but can certainly scan past resonances, so we should be fine alignment-wise with the OMC.