High Speed電離真空計について

概要

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In this article, "normal" gauge is defined as an ordinary ionization gauge having its electrode system in glass tube, while "high speed" gauge is defined as an electrode system itself mounted directly inside the test dome. It was pointed out by Blears that in the region of high vacuum (p_??_10-6mmHg) high speed gauge shows much less reading than that of normal gauge. Why this difference occurs and where this comes from? If complete informations about the behaviors of two gauges were obtained, the mechanism of "pumping action" of normal gauge may be deduced. By using a specially designed oil diffusion pump, the behaviors of normal and high speed gauges having identical electrode systems were examined under various conditions. At room temperature, the reading of normal gauge is about 35% of the reading of high speed gauge. When cold trap of liquid nitrogen is used, the readings of two gauges approach mutually. Finally, attempts to explain the mechanism of "pumping action" of normal gauge are made, but any conclusion about it isn't given here.
日本真空協会の論文