Abstract

Sputter-ion pumps are found to start easily from nitrogen with a wet metal surface load. Repeated wet starts do not change the starting or operating characteristics of the pump. Outgassing of wet stainless steel is found to follow the relation q = 1.25 × 10 −5 t −1.47 torr-litres per second per cm 2 after 15 minutes and to be independent in shape for short or long exposures to water.

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