J. Oberling, E. Merilh

Today we swapped the glitching BS oplev laser with one that has been stabilized.  Old laser SN 130-1, new laser SN 129-2.  This laser will thermally stabilize over the next 4-6 hours or so.  Once this is done, I will evaluate it to see if we need to do any small power tweaks to acheive stable operation (this is because the thermal environment in the LVEA differs from the lab the laser was stabilized in).

We also adjusted the whitening gain at the BS whitening chassis to suit the new laser.  The old SUM counts were ~75k with 15 dB of whitening gain.  After adjustment the new SUM counts are ~34k with a whitening gain of 9 dB; this is safer as we won't cause saturation if all the light happens to fall on one quadrant of the QPD.  A picture of the Output Configuration Switch is attached and these changes are captured here: T1500556-v2.

This completes WP #5651.