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.
The MCs and IMs alignment all looks fine. The AMPs and NPRO all went to disabled about an hour ago.
The NPRO and AMPs are all disabled as of 11:15 UTC
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
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.
There power issues on the Hanford site that could have easily glitched our power and caused the npro to trip.
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.