travis.sadecki@LIGO.ORG - posted 13:43, Tuesday 30 May 2017 - last comment - 13:55, Tuesday 30 May 2017(36524)
PSL Weekly
Laser Status:
SysStat is good
Front End Power is 34.02W (should be around 30 W)
HPO Output Power is 157.9W
Front End Watch is GREEN
HPO Watch is GREEN
PMC:
It has been locked 5 days, 5 hr 57 minutes (should be days/weeks)
Reflected power = 15.33Watts
Transmitted power = 59.06Watts
PowerSum = 74.39Watts.
FSS:
It has been locked for 0 days 20 hr and 33 min (should be days/weeks)
TPD[V] = 2.956V (min 0.9V)
ISS:
The diffracted power is around 3.6% (should be 3-5%)
Last saturation event was 0 days 4 hours and 23 minutes ago (should be days/weeks)
Possible Issues:
Head 1-4 flow error, see SYSSTAT.adl
Regarding the Head 1-4 Flow error, this is a known issue. Short version: When the PSL was restarted after last week's work on the new air bleed trap, the flow for laser head 3 did not come back to its previous value, and is low enough to trigger the warning error (but not low enough to trip the system). We can as of right now find no reason for this to have occurred, and there is nothing we can do about it without opening up the PSL cooling system (which is highly invasive). We are continuing to monitor this.