On a New Ultra-High Vacuum Pump

摘要

The theory of highly rarefied cascade flow was presented and a proposal for a new axial-flow (or radial flow) pump (or compressor) in the free-molecule range was made. An unconventional cascade was suggested which will produce an extremely high compression ratio (up to 30,000) in a single stage at very high blade speed (S = V sub b/square root (2 RT) = 20). This new pump (or compressor) can be used to reach any ultra-high vacuum state, i.e. and 'almost empty state'. (Author)