Optimized Nonevaporable Getter Cartridges
- 1 March 1970
- journal article
- Published by American Vacuum Society in Journal of Vacuum Science and Technology
- Vol. 7 (2) , 300-303
- https://doi.org/10.1116/1.1315844
Abstract
A matrix method is described for calculating the pumping speed of a cyclindrical gettering surface with pleated strips. The effect of cartridge geometry and sticking probability of the incident gases were calculated using a theoretical model for the gases carbon monoxide, nitrogen, and hydrogen. The results of the computations show that the pumping speed can be increased by decreasing the angle between the strips to an optimum value that depends on the ratio of the thickness of the strip to its width and on the incident gas. A comparison of calculated and experimental values for H2 on Zr–Al agreed to within approximately 20%.Keywords
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