Reports until 10:46, Friday 25 September 2026
H1 PSL
jason.oberling@LIGO.ORG - posted 10:46, Friday 25 September 2026 (92067)
PSL FSS RefCav Remote Beam Alignment Tweak

I tweaked up the beam alignment into the FSS RefCav this morning; the ISS was ON for this tweak and the IMC was unlocked.  Starting TPD was ~0.391 V, and current TPD ~0.498 V.

I also adjusted the ISS RefSignal, as the diffracted power % was ~3.5%.  The new RefSignal is -1.97, changed from -1.98, and the diffracted power % is now hovering around the 4.0% target.

Images attached to this report