I realigned the input pointing into the PMC this morning. Usually, the way I do this is to minimize any discernible mode structure in the PMC reflection CCD image. Today, I noticed that making the DC reflection go down also makes the DC transmission go down. Possibilities:

• we are sampling slightly different spots inside the PMC cavity which change the buildup by ~2-3%.
• we are misaligned on the transmission/reflection photodiode.
• ??