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Reports until 11:08, Tuesday 20 August 2024
H1 PSL
ryan.short@LIGO.ORG - posted 11:08, Tuesday 20 August 2024 (79607)
PSL FSS RefCav Remote Alignment Tweak

This morning, I attempted to improve the FSS RefCav alignment as the signal on the trans TPD has been falling over the past month. Using the two picomotor-controlled mirrors in the FSS path, I was only able to increase the signal from 0.54V to 0.66V, which is much less than I was hoping for. I'm still seeing what looks like a pitch misalignment on the RefCav REFL camera, but any further adjustment with the picos doesn't seem to be providing much more improvement on the TPD, so we'll likely need to go into the enclosure for some on-table alignment in the future to improve the alignment further.

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Displaying report 1-1 of 1.