Molecular Beam Sources Fabricated from Multichannel Arrays. III. The Exit Density Problem
作者:
Donald R. Olander,
Valerie Kruger,
期刊:
Journal of Applied Physics
(AIP Available online 1970)
卷期:
Volume 41,
issue 7
页码: 2769-2776
ISSN:0021-8979
年代: 1970
DOI:10.1063/1.1659313
出版商: AIP
数据来源: AIP
摘要:
Although the theory of Giordmaine and Wang adequately predicts the centerline intensity of a molecular beam from a channel source, it is less successful in describing the angular distribution. This deficiency has been ascribed to a nonzero number density at the tube exit. The end conditions chosen by previous workers lead to angular distributions which fail to satisfy total flow and average cosine restrictions. A method of choosing the parameters of the linear density profile which satisfies these integral constraints is described. The computed angular distributions according to the theories utilizing different end conditions differ very little from each other, but represent a clear improvement over Giordmaine and Wang's angular distribution.
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