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Reports until 11:56, Friday 29 August 2014
H1 AOS
jason.oberling@LIGO.ORG - posted 11:56, Friday 29 August 2014 (13676)
BS OpLev Laser Replaced

I checked the BS oplev laser this morning and sure enough, as per Keita's aLOG here, the laser was going bad and in need of replacement.  I watched the current monitor on the laser with a voltmeter (the monitor outputs a voltage) and ever 70'ish seconds it would drop from the set 0.760 V to 0.743 V.  This laser was replaced with one from the EE lab fresh off an install of a DC to DC convertor board.  This laser and its temporary DC power supply were installed between BSC2 and BSC3, on the East side.  I tried to hide the power supply as much as I could to protect from accidental damage but it is large, so for anyone working in that area, please watch your feet.  After installation I watched the current monitor and didn't see any drops as was seen with the previous laser.

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