He recommended that we put it in our design layouts, and not use it unless needed. Our response was that we had talked about using it, but that it was too early in the design phase to make that decision. Our response was that we have no plans for redblock filter. It may be a good idea to have a labyrinth between the camera turret and the detector to take full advantage of the reduced solid angle that the detector can see through the relatively slow cameras. Our response was that the structure now makes up the baffling, along with radiation shields.
Wiring is source of radiation now that cold motors are used.
We are using cold cavity structure and cold shields to do the baffling, and not using tubes around the optical path as done before. We plan to use hard black anodize on the inside of the cold cavity. We will be using a cold baffle immediately behind the window. He stated that OSU uses LN2 cooled charcoal instead of mechanical pumping to achieve really good vacuum. He said that he uses activated charcoal instead of molecular sieve for getter, but that he had no strong opinion on this.