Geometrical description of the X-ray capillaries with assumed reflection features

Mroczka, Robert; Żukociński, Grzegorz; Kuczumow, Andrzej

doi:10.1016/j.jallcom.2004.06.007

Cited by 3 publications

(9 citation statements)

References 29 publications

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“…The analytical solutions describing the propagation of Xrays through capillaries from our original papers [14,1,2] were used to write our own numerical program. This code is applied here to anticipate parameters and phenomena that are difficult to describe from the purely analytical point of view, i.e.…”

Section: Discussionmentioning

confidence: 99%

“…It requires comprehensive work, supported by a purely mathematic approach [1], numerical solutions ( [15,16] and this contribution) and technological progress [2,37]. It is worth noting that the interest in the capillary optics has shifted in last years from glass-made, long, allowing multiple bounces capillaries to metal-made, straight axis, strictly shape controlled and very smooth capillaries.…”

Section: Conclusion For the Future Workmentioning

confidence: 99%

“…The most comprehensive up to now ray tracing procedure has been announced by Vincze et al [15]. Finally, the analytical results in a form of solutions of differential equations were published [1,2]. They enabled passing from the well-known balance of the angles of:…”

Section: Introductionmentioning

confidence: 99%

“…Traditionally, it was the glass [30], mainly due to its specific features, especially the great ability for drawing in elevated temperatures [31,2]. But, as it was observed a long time ago, some high-density materials, such as metals and especially multilayers enable X-ray reflection at much greater angles than the glass does [32].…”

Section: Introductionmentioning

confidence: 99%

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Investigations of X-ray metallic capillaries

Mroczka

Żukociński

Kuczumow

2005

Journal of Alloys and Compounds

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Section: Discussionmentioning

confidence: 99%

Section: Conclusion For the Future Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigations of X-ray metallic capillaries

Mroczka

Żukociński

Kuczumow

2005

Journal of Alloys and Compounds

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“…Nevertheless, it is very difficult to produce a capillary of a small interior diameter with the fully controlled figure error, waviness and roughness of the surfaces and manufactured from the material with optimal mechanical and optical properties. Up to now, three kinds of materials were used for the production of capillaries: glass [8,9], metals and glass covered with metal. The metallic capillaries have some advantages: the greater values of the critical angles, which allowed the passage of the greater part of the wide primary beam through capillary; much easier control of the main axis straightness and the better performance during the Available online at www.sciencedirect.com www.elsevier.com/locate/tsf heat overload.…”

Section: Introductionmentioning

confidence: 99%

Optimization of metallic X-ray capillary production

et al. 2008

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Among all of X-ray capillaries, those produced from metals attract special attention due to their specific advantages: less severe limitations on the value of the critical reflection angle, better control of the capillary shape, the maintenance of the straight main axis. The metallic, single bounce capillaries with gold and rhodium internal surfaces described in this paper are produced according to the original method invented at KUL. The production of the capillaries started from the formation of the internal steel mandrel of a designed shape that was later covered with another metal and finally pressed with the epoxy-resin. Then the mandrel was removed by the combination of mechanical and chemical actions. The shape of capillaries was controlled with the laser scan micrometer. The long-distance shape distortions, obeying so-called waviness correlation length were pointed out. The capillaries produced in our laboratory were characterized by the waviness amplitudes reaching 40-80 nm with correlation length about 300 μm. The symmetry of the opening and the straight shape of the main axis were investigated with the optical microscope and laser light transmitted through the capillary and registered with the CCD camera. The symmetry was found close to circular. The internal surface of the capillary was studied on the longitudinal cross-sections by means of the field emission scanning electron microscope (FESEM) and atomic force microscope (AFM). The surface roughness (rms) was determined, the parameter defining the ability of the surface to reflect X-rays efficiently in the total reflection mode. The best gold surfaces produced up-to-now had the rms~2 nm, as measured on 1 μm × 1 μm areas. The results of preliminary exercises with synchrotron radiation were demonstrated.

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Characterization and application in XRF of HfO₂-coated glass monocapillary based on atomic layer deposition*

Wang

et al. 2021

Chinese Phys. B

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Coating a glass monocapillary x-ray optics with high-density film is a promising way to improve transmission characteristics. For a long time, it has been a challenge to coat a high-density film in the inside of monocapillary with an extremely high length-to-diameter ratio. In this work, HfO2 film is deposited on the inner wall of a tapered glass monocapillary with length 9.9 cm, entrance diameter 596.4 μm, and exit diameter 402.3 μm by atomic layer deposition. The coated and uncoated monocapillaries are studied by the transmission process of x-rays with energy from 5 keV to 100 keV and the x-ray fluorescence (XRF) spectra of a Mo sample are detected. Improved transmission characteristics have been obtained for the HfO2-coated monocapillary. The energy upper limit of focused x-rays increases from 18.1 keV to 33.0 keV and the ‘penetration halo’ is suppressed to some extent. The XRF spectrum presents two stronger peaks at ∼ 17.4 keV and ∼ 19.6 keV which are considered as the characteristic x-rays of Mo K α and Mo K β . These results reveal that more higher energy x-rays from the W x-ray tube are totally reflected on the inner wall of the HfO2-coated glass monocapillary due to the increase of total reflection critical angle. This work is significant for more applications of monocapillary in higher energy x-ray field.

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Geometrical description of the X-ray capillaries with assumed reflection features

Cited by 3 publications

References 29 publications

Investigations of X-ray metallic capillaries

Investigations of X-ray metallic capillaries

Optimization of metallic X-ray capillary production

Characterization and application in XRF of HfO₂-coated glass monocapillary based on atomic layer deposition*

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Geometrical description of the X-ray capillaries with assumed reflection features

Cited by 3 publications

References 29 publications

Investigations of X-ray metallic capillaries

Investigations of X-ray metallic capillaries

Optimization of metallic X-ray capillary production

Characterization and application in XRF of HfO2-coated glass monocapillary based on atomic layer deposition*

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Product

Resources

About

Characterization and application in XRF of HfO₂-coated glass monocapillary based on atomic layer deposition*