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Reports until 17:11, Sunday 30 June 2024
H1 PSL
ryan.short@LIGO.ORG - posted 17:11, Sunday 30 June 2024 (78766)
PSL FSS RefCav Remote Alignment Tweak

After H1 lost lock this afternoon, I took the opportunity to do a quick RefCav alignment tweak since the TPD was showing the transmission was low at around 680mV. Using the two picomotor-controlled mirrors in the FSS path, mostly adjusting in pitch, I was able to improve the signal from about 680mV to 870mV. More of an increase than I was expecting, but this should be good to last until the PMC is swapped out on Tuesday (where this alignment may need to be done again). I suspect I could've spent more time to improve this further, but I stopped here so as not to delay IFO locking any longer.

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Displaying report 1-1 of 1.