Investigations of X-ray metallic capillaries

Mroczka, Robert; Żukociński, Grzegorz; Kuczumow, Andrzej

doi:10.1016/j.jallcom.2005.03.107

Cited by 5 publications

(4 citation statements)

References 40 publications

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“…Nevertheless, the shapes of those monocapillaries are far from the design because of narrow etching grooves [10] and horizontal wedges [13] respectively. Although the process of manufacturing 'segmented' monocapillaries is further optimized [14,15] and monocapillaries with precise shape can be obtained, the smoothness of inner surface can still not be well controlled. Therefore another idea is proposed.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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“…The accurate measurement and control of this important parameter is very important for the design and fabrication of capillary x-ray optics, and more efforts are being made to find methods to measure the inner surface roughness of capillaries so as to optimize fabrication processes. In 2005, Matsuura et al [9] found that the roughness of their capillaries were in the range of 3 nm ∼ 6 nm in an area of 5 µm × 5 µm, and Mroczka et al [10] observed a rough structure of 3.5 nm in height (1 µm × 1 µm) in a capillary fragment by using AFM. In 2008, Mroczka et al [11] also used AFM to detect a capillary fragment with a large curvature and found that the results changed significantly while the area of measured region varied from 1 µm × 1 µm to 20 µm × 20 µm.…”

Section: Introductionmentioning

confidence: 99%

Measurement of inner surface roughness of capillary by an x-ray reflectivity method

李玉德¹,

林晓燕²,

谭植元³

et al. 2011

Chinese Phys. B

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“…This lens is not available commercially; it has been designed by one of the authors of this work. 12,13 EXPERIMENTAL Four types of x-ray lenses were evaluated: a single glass capillary (SGC) with tapered inner channel, a monolithic glass polycapillary (PC), a single metallic capillary (SMC) with parabolic inner channel, and a polycapillary conical collimator (PCCC). The lenses are shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of X‐ray optics applied for microanalysis

et al. 2008

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The performance of x-ray capillary lenses has been evaluated. The tests were carried out using an x-ray tube set-up. A single glass capillary with tapered inner channel, a monolithic glass polycapillary, and an in-house manufactured single metallic capillary with parabolic inner channel were characterized in terms of gain, spatial resolution, and element detection limits. The spatial resolution of a confocal set-up utilizing a monolithic glass polycapillary and a polycapillary conical collimator has also been measured. The highest gain of about 2500 was observed for the glass polycapillary. The maximum gain achieved with the single glass capillary was equal to about 25, and the gain of the metallic capillary was only slightly greater than 1. For the glass capillary and polycapillary lenses, significant filtering of the higherenergy photons (energy >8 keV) was observed. The lowest relative detection limits were obtained with an ordinary cylindrical collimator and the polycapillary lens. Similar absolute detection limits were achieved with the use of the polycapillary and single capillary lenses. A relation between the ratios of the detection limits of elements achieved with different x-ray lenses and the lens parameters (spatial resolution and gain) has been proposed and was verified experimentally. The monolithic polycapillary lens was found to be an optimum focusing device for an x-ray tube-based scanning spectrometer. This type of x-ray lens can be coupled with a polycapillary conical collimator or a polycapillary half-lens to make a confocal x-ray microscope capable of depth profiling with a spatial resolution equal to about 30 micrometers.

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Investigations of X-ray metallic capillaries

Cited by 5 publications

References 40 publications

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

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

Measurement of inner surface roughness of capillary by an x-ray reflectivity method

Experimental evaluation of X‐ray optics applied for microanalysis

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Investigations of X-ray metallic capillaries

Cited by 5 publications

References 40 publications

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

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

Measurement of inner surface roughness of capillary by an x-ray reflectivity method

Experimental evaluation of X‐ray optics applied for microanalysis

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

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