Thomas Vo, Greg Grabeel

Steering mirror serial #3 is cleaned and baked. The holes that the alignment rods fit through were mis-aligned from the manufacturer. They had drilled through half way, then rotated and drilled the other half. The holes had to be opened up from 0.25" to 0.262" to allow for the mis-alignment.

After reaming the holes cleaning started with liquinox on the back surface, an isopropyl bath including ultrasonic wand, and a freon wipe down. FTIR samples were taken before a 48 hr 200°C bake. The bake discolored the copper backing but not the reflective gold surface. The copper backing didn't change in any other ways and the oxidation didn't wipe off or shed.

A small stain survived the high purity rinse, as seen in the picture.

Steering mirror #4 underwent a similar cleaning process and is awaiting FTIR results.