Shaped X-ray beams by channeling in polycapillary optics. (September 2020)

• Record Type: Journal Article
• Authors: Hampai, D.; Guglielmotti, V.; Marcelli, A.; Cappuccio, G.; Dabagov, S.B.
• Is Part Of: Radiation physics and chemistry. Volume 174(2020:Sep.)
• Publication Date: 2020-09
• Subjects: Polycapillary optics -- Confocal geometry -- μXRF -- Coloured μCT; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2020.108965
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: Polycapillary optics (polyCO) is an x-ray optical unit used in different instruments in a wide variety of scientific and industrial applications. The optics works utilising the phenomenon of x-ray total external reflection at radiation transmission through the optics micro-channels. The polyCO devices, according to their geometries, are capable to focus x-ray beam, manipulate divergent or quasi parallel beams. Their use may reduce both size and weight of the device resulting in low power compact x-ray instruments. However, matching polyCO parameters is crucial for developing portable, remote or in-line, industrial sensors and novel instruments for materials science, chemical-environmental and bio-medical applications. In this work we present the analyses of x-ray beam formed behind polyCO devices paying attention to the parameters such as the radiation flux, focal spot-size and divergence. X-ray techniques will be also discussed to outline state of the art of world-wide polyCO-based research. Highlights: PolyCO optics manipulate X-ray beam to micro focal spot or quasi parallel beam. PolyCO shape profile influences focal spot characteristics. Identifying PolyCO profile parameters helps its fitting with X-ray techniques. The characterization procedures are validated through simulated tracing software.