Reports until 04:58, Monday 21 October 2024
H1 General (ISC, PSL)
ryan.crouch@LIGO.ORG - posted 04:58, Monday 21 October 2024 - last comment - 09:17, Monday 21 October 2024(80782)
OWL assistance

H1 called for help after "Not ready for 15 minutes" at 11:38 UTC. IMC_LOCK and LASER_PWR are in fault. My medms aren't opening on my no machine unless I do guardmedm in the console. IMC lock is saying the PMC and FSS can't lock, LASER_PWR is in fault, unable to get to 2Ws "IMC has no power". Following the IMC locking issues wiki page I've tried DOWN initing ISC_LOCK, IMCLOCK, and LASER_PWR, the FSS noise eater is green.

Comments related to this report
ryan.crouch@LIGO.ORG - 05:26, Monday 21 October 2024 (80783)
Link

The MCs and IMs alignment all looks fine. The AMPs and NPRO all went to disabled about an hour ago.

ryan.crouch@LIGO.ORG - 05:54, Monday 21 October 2024 (80784)
Link

The NPRO and AMPs are all disabled as of 11:15 UTC

Images attached to this comment
ryan.crouch@LIGO.ORG - 05:44, Monday 21 October 2024 (80786)PSL
Link

Running PSL weekly scripy yielded the following:
Laser Status:
    NPRO output power is 0.1373W (nominal ~2W)
    AMP1 output power is -0.4512W (nominal ~70W)
    AMP2 output power is 0.1128W (nominal 135-140W)
    NPRO watchdog is RED
    AMP1 watchdog is RED
    AMP2 watchdog is RED
    PDWD watchdog is GREEN

PMC:
    It has been locked 0 days, 0 hr 1 minutes
    Reflected power = -0.1761W
    Transmitted power = -0.02753W
    PowerSum = -0.2036W

FSS:
    It has been locked for 0 days 0 hr and 0 min
    TPD[V] = -0.01628V

ISS:
    The diffracted power is around 3.0%
    Last saturation event was 0 days 1 hours and 26 minutes ago


Possible Issues:
    NPRO power is low
    AMP1 power is low
    AMP2 power is low
    NPRO watchdog is inactive
    AMP1 watchdog is inactive
    AMP2 watchdog is inactive
    FSS TPD is low
    NPRO error, see SYSSTAT.adl

Images attached to this comment
ryan.crouch@LIGO.ORG - 05:57, Monday 21 October 2024 (80787)
Link

After talking to Jason, there's not much to do about this right now. More investigation needs to be done to see what happened to the laser, potentially needs to be swapped.

richard.mccarthy@LIGO.ORG - 06:57, Monday 21 October 2024 (80788)CDS, PSL
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There power issues on the Hanford site that could have easily glitched our power and caused the npro to trip.

ryan.short@LIGO.ORG - 09:17, Monday 21 October 2024 (80792)PSL
Link

Fil re-enabled the PMC high voltage after arriving on site, then I brought the PSL back up with little issue. One hiccup I ran into was with the new PDWD for the amplifiers; when the NPRO shut off this morning, the regular power watchdogs tripped the system off, but the PDWD did not. This meant I had to disable the PDWD before I was able to reset the system and turn the NPRO back on. After that, there were no issues recovering the PSL.