J. Oberling, E. Merilh

We replaced the PR3 oplev laser with one that has been stabilized in the lab, as well as installing the cooler for laser thermal stabilization and an armored 3m fiber; this is in accordance with ECR E1500224.  The serial number of the new PR3 laser is 198-1; the old SN is 191.  The new laser will be left to thermally stabilize for the next 4-6 hours, then we will start looking at spectrograms of the SUM signal during quiet times to determine if we need to adjust the laser power (since the thermal environment of the LVEA differs from the LSB optics lab).  The old laser, since it was showing no signs of failure, just glitching, will be taken to the LSB optics lab to be stabilized.

After talking with the control room we determined the PR3 optic is in a good alignment, so we realigned the PR3 optical lever.