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- W2020382005 abstract "It is shown how a simple 180°, miniature magnetic mass spectrometer can be used to improve vacuum techniques on rotary pump, diffusion pump and ion pump systems operating from 10−3 torr to UHV. The instrument described measures both total and partial pressure and provides for leak detection down to 10−11 torr. Results include measurements on foreline trap systems showing a reduction of 100,000 to 1 in hydrocarbon contamination and of 1000 to 1 in water vapour. Also included are results on an air cooled, polyphenyl ether oil diffusion pump system which gave a hydrocarbon contamination of less than 3 × 10−12 torr without cold trap and a total pressure of 5 × 10−9 torr." @default.
- W2020382005 created "2016-06-24" @default.
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- W2020382005 date "1970-04-01" @default.
- W2020382005 modified "2023-09-24" @default.
- W2020382005 title "Vacuum problems resolved by mass spectrometry" @default.
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- W2020382005 doi "https://doi.org/10.1016/s0042-207x(70)80117-8" @default.
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