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Reports until 19:39, Friday 20 December 2013
H1 IOO (IOO)
cheryl.vorvick@LIGO.ORG - posted 19:39, Friday 20 December 2013 (9054)
IM1 through IM4 realigned

- Kiwamu, Cheryl I

M1 and IM2 were aligned through the FI using beam clipping on the iput aperture and the beam at the output of the FI (no baffle to see, but other clues used to center).

After burning time on IM3 and IM4 and not making progress, I came up with a plan to use the wall markings and IM4 TRANS QPD to fine tune IM2 and IM3 alignment. The matks on the wall were from October. The two feducials should give a beam from IM3 that is at the same position and angle as the beam from October.

The beam on the PR2 baffle was difficult to see, but did cross the baffle when driving IM3 or IM4. Exact alignment wasn't possible, and when I left Kiwamu was working on getting a good camera view to assist in centering the beam using IM4.

Displaying report 1-1 of 1.