(Travis, Betsy, Kissel)

After getting the handoff beam from the input HAMs, we double checked that the beam was centered on the ITMx.  We then traced the beam and found it miscentered on the SR3 HR baffle (in front of SR3).  Using the BS bias, we were able to roughly center the beam on SR3 - using ITMx bias didn't seem to drive the beam very much.  We needed to use half of the BS YAW bias, however.  Once centered, we looked at SR2 and found the beam within 1-2" centered on the optic (with 0 bias on SR3).  We then used a bit of SR3 bias to roughly center on SR2.  Heading over to SRM, we again found the beam within 1-2" from the center of the optic and centered it using some SR2 bias.  We then verified that the beam (although blocked by a layer of First Contact on SRM-HR) sprayed through the OFI and out to HAM6.  We suspect the OFI alignment "won't take much."

Notes:

We paused to recheck the ISI locking of HAM5 when we observed that the beam wobbled when we rested on the table.  It seemed pretty locked, but the beam didn't seem to wiggle as much after we squeeked the lockers a bit more.

We increased the damping gains on the SR3 in order to help with the wobbling beam.

We started the realignment of the SR3 lower stage OSEMs.

Next up for HAM4:

Install TCS Temp Sensor Cable

SEI ISI Testing

FC Clean SR2

Chamber Closeout

Next up for HAM5:

Align all lower stage OSEMs on SR3 - a nasty task and will take a few hours, including checks of healthy SUS along the way

Pull FC on SRM (minor task)

OFI Alignment

OFI Res Testing

Install TCS Temp Sensor Cable

SEI ISI Testing

FC Clean SR3

Chamber Closeout