Toward sub‐micro‐XRF working at nanometer range using capillary optics

Abstract

Capillary optics are used for X‐ray fluorescence micro‐analysis using the Cu Kα line provided by a rotating anode. The excitation beam is focused using a polycapillary lens on a Co–Ti sample. Cylindrical glass capillaries of various diameters are fitted to the X‐ray detector (Energy Dispersive X‐Ray (EDX) analyzer) and displaced along the irradiated zone of the sample. The fluorescence is studied as a function of capillary position. Good agreement is found between experimental and calculated lateral widths of the fluorescence collection, taken into account the cylindrical capillary critical angles relevant in the experiment. The influence of the cylindrical capillary diameter on the signal level detected is studied to estimate the possibility of lateral resolution increase of X‐ray fluorescence technique both in‐lab and in synchrotron environment. Copyright © 2013 John Wiley & Sons, Ltd.

GGR Biennial Critical Review: Analytical Developments Since 2012

“…(), Cnudde and Boone (), Dehlinger et al . (), Holt et al . (), Nakazawa and Tsuji (), Huber et al .…”

Confocal X-ray technology based on capillary X-ray optics

“…The trend of confocal XRF is the development of the confocal XRF method with an optimized spatial resolution (Dehlinger et al 2013a). For example, the confocal XRF technology can base on a PFXRL in the excitation channel and a cylindrical monocapillary with radii ranging from 50 μm down to 5 μm in the detection channel to improve spatial resolution (Dehlinger et al 2013b).…”

Development and Applications of a Laboratory Micro X-ray Fluorescence (μXRF) Spectrometer Using Monochromatic Excitation for Quantitative Elemental Analysis

“…Future developments on the MetalJet technology will allow for a gain of 100 in intensity while being compatible with DCC optics. 14,30 Portable equipment is often battery-operated, using low-power X-ray tubes delivering a significantly lower flux, compared to standard laboratory systems. 31,32 Monochromaticity.…”

“…Advances in X-ray tube technology, such as the ULTRA-LITE X-ray source (Moxtek) or the field-emitter-based X-ray tubes, which both can be battery operated, make new developments in portable or hand-held systems for on-site analysis, which is often needed in, e.g., archeology and geology, possible. − A recent trend in μXRF imaging is represented by advances in three-dimensional (3D) elemental imaging. For synchrotron radiation (SR)-based instruments, this is, to a large extent, enabled by the application of new detector types and detection modes, based on either full-field detectors or fast, large-solid-angle, multielement detectors, making sub-millisecond dwell times possible. − This trend is not only seen at SR facilities but also in the laboratory environment by the development of confocal detection based 3D-XRF spectrometers coupled with the development of algorithms needed to obtain quantitative information on the sample in question. ,− A third avenue of development is represented by the combination of several techniques into one laboratory instrument such as the combination of XRF with Raman spectroscopy or the combination of XRF/XRD. , …”