I replaced the final steering mirror (Y1-1037-45-S) in the zig-zag path on the PSL table by a 0 deg mirror Y1-1037-0.
With a sensor card I confirmed the transmission reduced a lot after the replacement.
As we expected, the replacement of the mirror caused a mis-alignment of the incident beam axis to the MC, so I compensated it by touching the angle of the mirror a little bit.
After the alignment of the mirror, the MC is still resonating at TEM00.
We will check the spot positions more accurately by A2L technique.
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- Y1-45S has 4% of transmission. Definitively we like to use Y1-0 or anything else. There must be the replaced mirror.
I think Suresh replaced it. So he must remember wher it is.
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