Ryan C, Sheila, Jennie, Jenne, Camilla, Ryan S, Daniel
Ryan got the green arms locked and then Sheila and I went on ISCT1 to improve the COMM and DIFF beatnotes, to +2dB and -10dB.
Dave and Ryan fixed a ISC_LOCK Channel not found error.
Sheila then aligned MITCH and started to check the phasing using 'ndscope sheila.dwyer/ndscope/LSC/phase_LSC_9_and_45.yaml'. Comparing to November, screenshot attached. First AS_A_RF45 was rephased after WFs were centered, needed +90deg. See sdf's attached. All LSC 45's were then phased following the same +90deg. Check REFL 9 with a swinging MICH and decided it was close enough. No LSC RF9's were changed.
There were some pauses for JAC table work.
Ryan then re-ran green initial alignment (wasn't done this AM), checked beatnotes were still fine. Jenne, Jennie and Sheila locked ALS and locked MICH.
Sheila needed to revisit PRX alignment as struggling to find POP beams.
Jenne realized the mode cleaner isn't using DOF3, it used to feedback to the PZT, but now needs to feedback to JM3.
Daniel did the IMC phasing of WFs.
I put IM2 and 3 back to their values on the 12th December when we were doing manual initial alignment.
LSC_POP_A and LSC_REFL_A were close to their values on 12 December (when ALIGN_IFO was in state 35). I put the RM 1 and 2 mirrors back to there values at this reference time also.
After Jennie put IM2 back to where it had been, we re-moved IM3 to get roughly back to where we'd been on IM4 trans, and then IM4 to get back to where we'd been on ASC POPA and POPB QPDs.
We could then move PRM to align PRX, and lock PRX just fine. However, we still don't have any significant signal on the ASC REFL WFS. RyanS noticed that when we were re-aligning PRM, that we'd get a flash of light on ASC REFL B. So, we moved PRM around and found that we can get a good amount of light (almost 4000 counts) on ASC REFL B with an offset on PRM of -1000 counts in yaw. This is a *huge* number, so something is clearly wrong with the pointing of our incoming beam. We could get a bit of light on ASC REFL A, but only as much as ~4 counts (so, 1000x too small) no matter how much we moved PRM, RM1, and RM2. The RMs we moved until they were saturating, so it's not their fault - there's just something we don't understand yet about the input pointing.
One thing this means (among other reasons we're not powering up yet) - we want to hold off on going to more than 10W or so until we're sure that the PRM refl beam is going to be hitting the porcupine beam dump on top of HAM2.
(Sheila has some other notes on other things we did today).
Next steps: *shrug*. We're pretty sure that all of the input pointing optics are back to where they were in ~Dec. The IMC is aligned to where it had been, via the WFS and centering on MC2 trans, so we're probably fine up to there. Anyhow, next steps are still figuring out where our REFL and POP beams are going, since it's not to the PDs.