Before Yuta left, I asked him to restore all optics to last saved values, to avoid hysteresis.
Some interesting modes appear at ETMYT and ETMXT. The cavities aren't super well aligned right now, especially since we have been seeing this input pointing drift, but it's cool to see our first DRFPMI flashes. SRM, in particular, hasn't been aligned since before pumpdown. If I misalign SRM, the mode content at the trans cameras improves somewhat, but it still isn't all low-order modes.
Here is the note that I wrote on youtube describing the video:
DRFPMI Flashing
Upper left is AS, upper right is POP
lower left is Xarm Trans (ETMXT), lower right is Yarm Trans (ETMYT)
Arms were last aligned several hours ago, and we know input pointing drifts, so at least some of the higher order modes in the arm transmissions are due to poor input pointing. All optics are "restored" to their last saved values, including SRM, which has not been aligned since before pumpdown.
TRX DC PD values are flashing to as high as 10
TRY DC PD values are flashing to as high as 7
Since uploading the video, I have seen TRY flash (once) to 45. Yes, forty five!!! Both arms are usually flashing to ~3ish, with an occasional medium flash (5-10), and then a few rare TRY flashes above 20.
We may have officially lost the bet of having arms locked by 9am Monday, but I think Team Grad Student / Postdoc still deserves some beer from Team Faculty / Staff. |