[Antonio,Tara] We glue PMC back mirror to PZT and wait for it to settle.

Since we have all parts for the steel PMC (body/PZT/Mirrors) we start putting it together. The first step is using epoxy to glue the back mirror to the PZT.

There is a little problem. The soldering tin on the PZT gets a bit to the edge of the PZT, see picture. When we put the PZT on the steel end cap, one side of the soldering tin electrically connects to the end cap.

So we decide to put a kapton tape as an insulator between the pzt and the end cap. (We thought about resoldering the tin, but we were not sure if we would make it worse).

It is quite hard to center the mirror-pzt on the end cap, so we plan to use a fixture to keep the mirror center at the end cap. It will be something similar to the plastic piece we used for cavity-mirror assembly.

We want the mirrors' positions to be as precise as possible to reduce clipping loss, and beam alignment problem.

See the rest of the picture in Picasa

Note about epoxy: The epoxy we use is EP-30 (suggested by Rick Savage, provided by Callum). There's a test procedure to check if we mix the epoxy correctly or not.

After mixing the epoxy, you have to put a small amount of epoxy in an oven at 200 F for 15 minutes to check if the mixture is good or not.

If the epoxy in test came out smooth and hard, it is good. You can proceed with the work. We tested that, and our mixture was good.