Accession Number : AD0615149

Title :   ON A NEW ULTRA-HIGH VACUUM PUMP,

Corporate Author : PRINCETON UNIV N J GAS DYNAMICS LAB

Personal Author(s) : Wu,Yau

Report Date : DEC 1964

Pagination or Media Count : 16

Abstract : 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)

Descriptors :   (*VACUUM PUMPS, HYDRODYNAMICS), COMPRESSORS, CASCADE STRUCTURES, DENSITY, GASES, HEAT TRANSFER, MATRICES(MATHEMATICS), PROBABILITY, VACUUM

Distribution Statement : APPROVED FOR PUBLIC RELEASE