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- W2010244803 abstract "Pressures in the low 10−12 Torr range are produced by a 200 °C bakeout with a turbomolecular pumping system. A small molecular drag pump in conjunction with the membrane pump turns out to be an effective means of achieving low backing pressures. The stainless-steel test chamber of 6800 cm2 surface area has been prebaked to 450 °C. An ultimate pressure of 1×10−12 Torr is obtained on the extractor gauge and to date this is the lowest pressure attained with turbomolecular pumps only. This system offers simplicity of arrangement, ease of operation, rather low cost, and fast pumpdown to ultrahigh vacuum. The pressure reaches 2×10−9 and 4×10−11 Torr at 2 and 83 h, respectively, after startup without bakeout when vented to atmospheric pressure using extremely dry nitrogen." @default.
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- W2010244803 date "1995-07-01" @default.
- W2010244803 modified "2023-10-14" @default.
- W2010244803 title "Creation of extreme high vacuum with a turbomolecular pumping system: A baking approach" @default.
- W2010244803 doi "https://doi.org/10.1116/1.579547" @default.
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