Reports until 14:14, Friday 19 September 2025
H1 PSL
oli.patane@LIGO.ORG - posted 14:14, Friday 19 September 2025 - last comment - 18:18, Friday 19 September 2025(87026)
PSL Status Report Weekly FAMIS
Closes FAMIS#26662, last checked 86750

Laser Status:
    NPRO output power is 1.873W
    AMP1 output power is 69.91W
    AMP2 output power is 138.9W
    NPRO watchdog is GREEN
    AMP1 watchdog is GREEN
    AMP2 watchdog is GREEN
    PDWD watchdog is GREEN

PMC:
    It has been locked 3 days, 3 hr 49 minutes
    Reflected power = 24.56W
    Transmitted power = 104.1W
    PowerSum = 128.7W

FSS:
    It has been locked for 0 days 3 hr and 22 min
    TPD[V] = 0.5336V

ISS:
    The diffracted power is around 4.5%
    Last saturation event was 0 days 5 hours and 44 minutes ago


Possible Issues:
	PMC reflected power is high
	FSS TPD is low
Comments related to this report
ryan.short@LIGO.ORG - 18:18, Friday 19 September 2025 (87032)

In regards to the "FSS TPD is low" warning, this is simply because we've recalibrated that PD as of Tuesday (alog86972), so the nominal "good" value has changed and I forgot to update this status script accordingly. Since we just realigned the FSS path and are happy with the results, this TPD reading of about 0.54 V is acceptable.

PMC REFL being high is not a new issue, but it doesn't hurt to be reminded about it.