dale.ingram@LIGO.ORG - posted 09:08, Thursday 03 January 2013 - last comment - 15:35, Thursday 03 January 2013(5022)
PSL shutoff
I let Michael R know that the NPRO is off. H1:PSL_AMP_ENABLEPWRDOG was alarming this morning.
The power watchdog on the frontend tripped last night, shutting down the laser. This appears to be due to a change in humidity affecting the pickoff power, as we have seen before. The laser power recorded by AMP_PWR3 read 91% when the watchdog was turned on, and decreased by 15% to 77% to trip the power watchdog. The power recorded by OSC_PD_AMP_DC_OUTPUT had decreased by about 250mW during this time, or 0.8%
The laser is still off as we try to move over to the final RF configuration.