evan.hall@LIGO.ORG - posted 01:32, Wednesday 01 April 2015 - last comment - 15:46, Wednesday 01 April 2015(17603)
Laser tripped
Koji, Evan
The NPRO shut off at around 08:11:00 UTC.
The interferometer was locked with no measurements or injections running.
PSL restarted without issues at ~7:30 this morning.
It is not clear if the cause of the trip was an NPRO shutdown or a flow sensor glitch. Investigation ongoing.
In the future, if the PSL drops out like this don't hesitate to call me at any time of day or night, any day of the week (home 509 627-1129, cell 509 539-4354).
I will either walk someone through the restart or come in myself and restart the system. I prefer not to leave it down for longer than necessary.