Actually, I tried some tweaks of the input steering to get the beam being more centered on the MC mirrors on Saturday evening.
I made a mistake in the direction of the IM1Y tuning, and it made the horizontal spot position worse.
But, this also means that the opposite direction will certainly improve the horizontal beam angle.
Rotate IM1Y CCW!!!
The current setting is listed below
Alignment
MC1P 3.2531
MC1Y -0.5327
MC2P 3.3778
MC2Y -1.366
MC3P -0.5534
MC3Y -2.607
Spot positions
MC1H = +1.15 mm
MC1V = -0.13 mm
MC3H = +0.80 mm
MC3V = -0.20 mm
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Deviations of the MC spot from the center of the mirrors were measured.
MC1H = +0.29 mm
MC1V = -0.43 mm
MC3H = +1.16 mm
MC3V = -0.68 mm
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