We aligned and locked Y arm for green:
- installed camera on PSL to monitor green transmission
- aligned green path on the ETMY table to see the beam on the PSL camera
- misaligned ETMY and aligned ITMY to see reflected beam on REFL PD
- installed green transmission PD on PSL
- aligned ETMY and locked YARM to 00 mode
I've switched error channel cable to output monitor. Whitening filter is need for scattering measurements.
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