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Reports until 20:41, Wednesday 13 March 2013
H1 IOO
chris.mueller@LIGO.ORG - posted 20:41, Wednesday 13 March 2013 (5786)
Input Optics Work
[Deepak K., Rodica M., Chris M.]

Tasks Accomplished:
* Realigned MC Refl beam through the periscopes.  It was off center on some of the baffles by 1/2 a beam diameter.
* Tweaked the alignment of the beam through the Faraday. It was reasonably well aligned already, but we made a small adjustment to IM1.
* Implemented Rodica's brilliant idea to reroute the MC Refl beam to overlap with the main beam.  We did so by using two eLIGO steering mirrors and injecting at MC3 (see pictures).  This gives us the full ~180 mW of power downstream of the IMC to align auxiliary beams.
* Installed the HWP in the rerouted MC Refl beam to correct the funky polarization.

Notes:
* The first hard aperture(HA1) needs to be recentered after the clamp issue is fixed.  (It has a large dog clamp).
* The AOEs are missing their second SiC baffles still.  Recheck the centering after the baffle is installed.  
* We removed MC3 AR Baffle and placed it in front of MC3.
* We borrowed the HWP from the main beam line to correct the polarization of the rerouted MC Refl beam.
Images attached to this report
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