[Everyone]

We have determined (a few hours ago) that flipping the ESD bias sign on ETMX does not allow us to lock ALS DIFF.  Jeff has looked through the settings, and everything is flipped to match the bias sign as appropriate, but we're still not able to lock.  It looks like a crossover is unstable, or something like that.  For now, we have reverted the ETMX ESD bias to its pre-Tuesday state, which has facilitated locking.  Team SUS will look into this later.

The ISS is much better behaved now that the alignment work was done.  However the FSS gain change was making the IMC loop very nearly unstable, and we lost lock during the power-up twice due to this instability.  Sheila and Keita will post their measurements that discovered and fixed this issue.

We have so far been able to power up to 40W once, but it looks like a PI rang up pretty quickly.  Carl will post details, but this is a new mode that hasn't been a problem previously, so it does not yet have damping settings.

At this time, it looks like there is no problem in getting to 40W, and other than PI damping we should be able to get all the way to low noise.

If Carl is unable to find damping settings relatively quickly, we may choose to instead only go to 20W for tonight, so that we can get to low noise and set the intent bit.  Stay tuned for more updates...