Capillary x-ray compressor: Principle vs. practice
- Univ. of Washington, Seattle, WA (United States). Dept. of Physics
- Pacific Northwest Lab., Richland, WA (United States)
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. The authors 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 {micro}m or more, and outlets on the order of 1 {micro}m or less. The authors 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. They 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 {micro}m and outlet diameters of 1.3--1.4 {micro}m 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.
- DOE Contract Number:
- FG05-89ER45384; AC06-76RL01830
- OSTI ID:
- 220792
- Report Number(s):
- CONF-950793--; ISBN 0-8194-1875-7
- Country of Publication:
- United States
- Language:
- English
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