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camilla.compton@LIGO.ORG - posted 16:50, Wednesday 02 September 2026 (91792)
Final in-lab Alignment Check on CHETA IY Table

Jackie, Camilla 

As we're planning to move CHETA IY table into the LVEA soon, we did a final alignment check in the lab. Beam was around 10mm off the final iris in yaw. Looks like we only checked one iris in our other final checks 91009

We spent some time iterating M3 and M4 but the alignment was strange and we couldn't align the beam on the final two iris without getting close to clipping our optics. Removed L2, aligned to irises and replaced L2 keeping the beam centered on irises. After this we checked the alignment with L1 at +/-25mm. It stayed well aligned to irises. Left translation stage at the nominal -10mm 91041. We checked the beam was hitting close to the center of the thermal PD. 

We also labeled all cables as per D2500305 and marked the top and side panel ready for attaching the panel sensors.

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