= Interface between CRY and VAC =
== Interface Item (1) Out-gassing ==

Very low out-gassing is required for the cryostat chambers and ducts.<<BR>>
The materials of those are '''vespel and thin SI'''. <<BR>>
The baffles and shields  are coated by '''DLC'''<<BR>>
The inner wall of the chambers, ducts, and shields are polished.