Keita, Jason, Ed, Betsy

After the IO group installed the MC bypass today, Keita, Jason, Ed and I embarked on the beam pointing from the PR to the ITMs.  We centered PR2 to PR3, then PR3 to ITMx-CP.  We utilized the new target that was already on PR3, but the beam is many inches in diameter and viewing was difficult (as anticipated).  Still we think we could see it well enough to have it centered to within ~1cm on the target.  We then removed this target and the iris in front of PR2 (which likely was clipping the diameter a bit), and looked down at the BS and then CPX.  Again this was difficult, but also doable to within ~1cm.  Jason and Keita were inside the BSC chamber and used a series of rulers and IR viewers to find reference of the beam placement on the optic centerline.

Attached is the snapshot of the IFO alignment slider settings as we've left it for the night.  We'll resume the BS to SR cavity optics tomorrow.  (We'll also continue on the Elliptical baffle alignments when the newly fabbed target is out of clean and bake tomorrow morning.

Note, we had to ask Chandra to turn down the purge a tad in order to quiet the beam a bit.