The Y-End green beam was roughly aligned by the steering mirrors for the green beam.
I couldn't understand the Y-End green setup as the PD was turned off and the sign of the servo was flipped. Once they are fixed, I could lock the cavity with the green beams.
After a long alignment session, TEM00 was found. The alignment of the green beam has not been optimized.
Looking at the spot position at ETMY OSEM holders (not by the ccd image), it seems that the cavity mode is not at the center of the mirrors.
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[EricQ, Jenne, brains of other people]
Get green spots co-located with IR spots on ETMs, ITMs, check path of leakage through the arms, make sure both greens get out to PSL table
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