Mass Spectrometric Study on Adsorption by B-A Gauge

概要

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The pumping action of the Bayard-Alpert gauge(B-A gauge)operated in ultra high vacuum was studied by use of a statically operated mass spectrometer. The sample gases measured were rare gases, carbon monoxide, nitrogen and methane, all of which are analyzable by static operation. The results are summarized as follows; The electrical pumping speed of the B-A gauge for A, CO, and N2 were 0.050, 0.06 and 0.12l/sec, respectively. The power of chemisorption of CO on the clean surface of Mo and W was remarkably large, and the rate of chemisorption to the electrodes of the B-A gauge was about 1.5 l/sec, but not chemisorbed on the glass surface. N2 was chemisorbed on the clean surface of W, but not that of Mo. No chemisorption of rare gases on the clean surface could be observed.
日本質量分析学会の論文