Abstract
A simple sorption-type ultra-high vacuum system has been devised in which thin metal foils can be prepared quickly, with perfection and measurable reproducibility. Ultimate vacuum of 3 × 10-10 torr had been obtained using liquid nitrogen around the sorption, and evaporation chambers. Ultimate vacuum of 3 × 10-9 torr has been routine prior to evaporation of gold, silver, copper, and nickel foils which ranged in thickness from 500-2000 A. High purity single crystal silver foils have been repeatedly prepared in this system which are suitable for direct analysis of deformations by transmission electron microscopy. A comparison is made between the order and quality of these ultra-high vacuum prepared foils with foils prepared using commercially available high vacuum equipment.
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