Reports until 10:56, Monday 21 April 2025
H1 PSL
ryan.short@LIGO.ORG - posted 10:56, Monday 21 April 2025 (84022)
PSL 10-Day Trends

FAMIS 31082

Generally, things are stable following the three days of work in the enclosure for the SPI pick-off path install last week, which show clearly on several trends. Most notable is the decline in PMC and RefCav transmission, which have significant misalignments as seen by the beam spot cameras. Fil and I plan to switch the connection of the picomotors to their new driver tomorrow, so after that they'll be usable again and I'll touch up the alignments.

Also, we have still not increased the pump currents for AMP1 as we noticed last week following the power outage. This should bring the power out of both amplifiers and the PMC closer to their levels pre-outage.

Images attached to this report