Reports until 09:28, Thursday 30 July 2026
H1 PSL
jason.oberling@LIGO.ORG - posted 09:28, Thursday 30 July 2026 (91325)
PSL Back Online After Interlock & CDS Work

The PSL is now back on after the CDS and interlock work over the last couple of days.  We turned the PSL back on yesterday and locked the PMC at the end of the day so both could warm up overnight.  This morning I tweaked beam alignment into both the PMC and RefCav.  With the ISS ON, PMC Trans is ~104.8 W and PMC Refl is ~28.6 W, while the FSS RefCav TPD is ~0.527 V.  PMC Trans and Refl have not quite returned to their pre-interlock work levels, but in the past we've seen that it can take up to 24 hours for this to occur.  To that end, I have left the ISS OFF while the PMC continues to warm up, but it can be turned on whenever it is needed.