Reports until 16:11, Tuesday 21 April 2015
H1 AOS (AOS, SUS)
douglas.cook@LIGO.ORG - posted 16:11, Tuesday 21 April 2015 (17986)
Y End ETMy OPLVR laser died
The ETMy OPLVR laser over heated when its cooling fan quit. I pulled it and Jason and I repaired the unit and will run it over night on the bench. We tweaked the alignment, temperature settings as well as the current to get the best stabilization from it and will look at it in the AM to see if continues to be stable. Given Control Room permission we will reinstall it in the AM. We had added 1 too many diodes to the fan to slow down the RPM to quiet the acoustic noise which caused too large of a current draw causing the fan to over heat and stop.
Doug and Jason