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1997•Journal of Vacuum Science & Technology A Vacuum Surfaces and FilmsRequires access

Effect of the Cr-rich oxide surface on fast pumpdown to ultrahigh vacuum

Inkyu Chun, B. Cho, S.-M. Chung

Open publisher page 8 citations

Abstract

The outgassing characteristic of an ordinary stainless-steel ultrahigh vacuum (UHV) chamber was determined using an extremely dry nitrogen venting system, and compared with that of an extreme high vacuum (XHV) chamber. A marked sorption resistance effect of the vacuum surface of the XHV chamber was found. The outgassing rate of the XHV chamber was about 100 times lower than that of the ordinary UHV chamber in the unbaked case. It is believed that the recent achievement of fast pumpdown to UHV is the result of not only the reduction of the water content of the venting gas, but also the low gas-sorbability of the vacuum surface.

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What this paper is about

The outgassing characteristic of an ordinary stainless-steel ultrahigh vacuum (UHV) chamber was determined using an extremely dry nitrogen venting system, and compared with that of an extreme high vacuum (XHV) chamber. A marked sorption resistance effect of the vacuum surface of the XHV chamber was found. The outgassing rate of the XHV chamber was about 100 times lower than that of the ordinary UHV chamber in the unbaked case. It is believed that the recent achievement of fast pumpdown to UHV is the result of not only the reduction of the water content of the venting gas, but also the low gas-sorbability of the vacuum surface.

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OpenAlex reports 8 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

The outgassing characteristic of an ordinary stainless-steel ultrahigh vacuum (UHV) chamber was determined using an extremely dry nitrogen venting system, and compared with that of an extreme high vacuum (XHV) chamber. A marked sorption resistance effect of the vacuum surface of the XHV chamber was found. The outgassing rate of the XHV chamber was about 100 times lower than that of the ordinary UHV chamber in the unbaked case. It is believed that the recent achievement of fast pumpdown to UHV is the result of not only the reduction of the water content of the venting gas, but also the low gas-sorbability of the vacuum surface.

Key concepts: Outgassing, Vacuum chamber, Ultra-high vacuum, Nitrogen, Materials science, Oxide, Nitrogen gas, Analytical Chemistry (journal)

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