2005
DOI: 10.1002/ppsc.200501004
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Capillary Optics in X‐Ray Analytics

Abstract: The principles of X-ray capillary optics are described and different types of capillary optical elements are discussed, especially, the main parameters of these optical elements such as intensity gain, focal spot size, beam divergence, etc. Details are given and experimental results for these parameters are presented. Furthermore, various application examples in micro X-ray fluorescence analysis for the determination of the two dimen-sional elemental distribution at sample surfaces as well as depth profiling a… Show more

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Cited by 28 publications
(20 citation statements)
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“…Tapered types can be used to focus or "bent" beams for certain applications, whereas straight capillaries are used to image the X-ray fluorescence response of flat sample surfaces. [2] In our case, the entrance and exit openings of the capillaries are equal (20 μm) resulting in 1:1 images. Optics with different ratios between entrance and exit diameters of their capillaries are also available to map smaller fields of view with a larger magnification.…”
Section: Optics Patternmentioning
confidence: 84%
See 1 more Smart Citation
“…Tapered types can be used to focus or "bent" beams for certain applications, whereas straight capillaries are used to image the X-ray fluorescence response of flat sample surfaces. [2] In our case, the entrance and exit openings of the capillaries are equal (20 μm) resulting in 1:1 images. Optics with different ratios between entrance and exit diameters of their capillaries are also available to map smaller fields of view with a larger magnification.…”
Section: Optics Patternmentioning
confidence: 84%
“…Due to its plasticity during the fabrication process, poly‐capillaries can be bent and shaped. Tapered types can be used to focus or “bent” beams for certain applications, whereas straight capillaries are used to image the X‐ray fluorescence response of flat sample surfaces . In our case, the entrance and exit openings of the capillaries are equal (20 μ m) resulting in 1:1 images.…”
Section: Challenges and Approachesmentioning
confidence: 99%
“…These results show that it is possible to collect the fluorescence signal using a thinner capillary without any loss on the signal level if it is close enough to the surface. Of course, using a brighter primary source such as a rotating anode or a liquid-metal jet anode electron-impact X-ray source [20], a significantly higher signal (up to 100 times) can be expected Moreover, replacing the cylindrical capillary at the entry of the detector by an elliptical one would lead to an extra gain of 20 [21,22]. Thus sub-micro-resolution XRF would be possible with an in-lab excitation source.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, the use of elliptical instead of cylindrical capillaries would increase the signal level by an extra factor of 20 . Finally, working with high‐brightness sources would further enhance the intensity to a comfortable level.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, the use of elliptical instead of cylindrical capillaries would increase the signal level by an extra factor of 20. [19,20] Finally, working with high-brightness sources would further enhance the intensity to a comfortable level. For example, recent breakthroughs in the field of liquidmetal-jet anode electron-impact X-ray source suggest that a significant gain in incident flux can be reached regarding Step 1…”
Section: Resultsmentioning
confidence: 99%