FAMIS 20031

The main event from this past week was our incursion to investigate PMC losses (alog78093). PMC REFL is still high, but after our work it seems there was a jump up of about 1.3W. We believe this is due to some alignment shift into the PMC (likely from drag wiping M11 and having the environmental controls on for a couple of hours) evidenced by the change in the PMC REFL spot on the camera. Tomorrow during maintenance I plan on tweaking the alignment with the picos to hopefully bring it back to a more reasonable level.

Interestingly, there also appears to have been a change in the outputs of the NPRO and the diodes in both amplifiers at the time of our work in the enclosure. While the overall power output of the NPRO and amps are largely unchanged, I find this interesting as nothing was done with any of these components (shutters, pump current, etc.) except for the power watchdogs being turned off temporarily. Perhaps this behavior is simply a result of the environmentals being slightly different while working in the enclosure.