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Proceedings Paper

Capillary xray compressor: principle versus practice
Author(s): Dale L. Brewe; Steve M. Heald; Bill Barg; Frederick C. Brown; Kyungha H. Kim; Edward A. Stern
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Paper Abstract

Guiding x rays down the inside of tapered capillaries is a means to increase the flux density of x rays from synchrotron light sources without some of the disadvantages inherent in other techniques. We have demonstrated that a process based on techniques for fabrication of glass fibers may be used to produce tapered capillaries with inlet diameters on the order of 150 micrometers or more, and outlets on the order of 1 micrometer or less. We present a description of the capillary fabrication and results of tests of the performance of several capillaries, along with a comparison with calculations of performance. We also summarize refinements to the fabrication process that will provide additional improvements. The transmission of x rays from linear capillaries with inlet diameters of approximately 150 micrometers and outlet diameters of 1.3 - 1.4 micrometer is on the order of 2%, with corresponding intensity gains of up to 274. Initial results indicate that the capability exists for producing convex profiles necessary for optimal transmission. Calculated and measured transmission efficiencies are in fairly good agreement, leading to the expectation that efficiencies predicted by calculations to be attainable from optimal profiles are a realistic goal, given the ability to manufacture these profiles.

Paper Details

Date Published: 25 September 1995
PDF: 7 pages
Proc. SPIE 2516, X-Ray Microbeam Technology and Applications, (25 September 1995); doi: 10.1117/12.221680
Show Author Affiliations
Dale L. Brewe, Univ. of Washington (United States)
Steve M. Heald, Pacific Northwest Lab. (United States)
Bill Barg, Univ. of Washington (United States)
Frederick C. Brown, Univ. of Washington (United States)
Kyungha H. Kim, Univ. of Washington (United States)
Edward A. Stern, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 2516:
X-Ray Microbeam Technology and Applications
Wenbing Yun, Editor(s)

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