Journal ArticleDOI
On X-ray channeling in a vibrating capillary
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TLDR
In this article, a different use of polycapillary optics is presented to achieve an efficient radiation collimation due to handled beam profiling that avoids the typical one based on total external reflection into the capillary channel, where a vibration is applied to a monocapillary in order to emulate a virtual roughness on the channel internal wall surface.Abstract:
A novel study on a different use of polycapillary optics is presented. The scope of this study is to achieve an efficient radiation collimation due to handled beam profiling that avoids the typical one based on total external reflection into the capillary channel. For this purpose a vibration is applied to a monocapillary in order to emulate a “virtual roughness” on the channel internal wall surface. The transmission properties of such a system for different vibrational states are discussed.read more
Citations
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Journal ArticleDOI
Challenging X-ray Fluorescence Applications for Environmental Studies at XLab Frascati
Giorgio Cappuccio,Giannantonio Cibin,S.B. Dabagov,Alfredo Di Filippo,Gianluca Piovesan,Dariush Hampai,Valter Maggi,Augusto Marcelli +7 more
TL;DR: In this paper, the authors report applications of the total external X-ray fluorescence (TXRF) station, a prototype assembled at the XLab Frascati laboratory (XlabF) at the INFN National Laboratories of Frasati (INFN LNF).
Journal ArticleDOI
X-ray applications and recent advances @ XLab Frascati
S.B. Dabagov,S.B. Dabagov,Dariush Hampai,V. Guglielmotti,G. Cappuccio,E. Capitolo,Yu. P. Gladkikh +6 more
TL;DR: In this paper, the results obtained in key case studies where they performed: (i) 2D/3D µXRF to analyse chemical composition of tree rings with respect the influence of the environmental context, to study a “fresco” fragment and assess the presence of damages, to make a 3D reconstruction of a screw encapsulated in glue through the its elemental composition as well as X-ray imaging and (iii) µCT/dynamic CT to characterize LiF detectors, to evaluate the profile distribution of a diesel spray from the nozzle.
Journal ArticleDOI
Shaped X-ray beams by channeling in polycapillary optics
TL;DR: In this article, the authors 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.
Proceedings ArticleDOI
2D and 3D micro-XRF based on polycapillary optics at XLab Frascati
TL;DR: The Rainbow X-Ray (RXR) as discussed by the authors is based on the confocal arrangement of three polycapillary lenses, one focusing the primary beam and the other two capturing the fluorescence signal.
Proceedings ArticleDOI
Possibility for new PolyCO imaging: stroboscopic imaging based on vibrating capillary optics
TL;DR: In this article, the behavior of the transmitted radiation through a single capillary in vibrating regime was studied with a sample characterized by a known periodic event, and a synchronized vibrating capillary was used for stroboscopic imaging.
References
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Journal ArticleDOI
Multiple reflection from surface X-ray optics
TL;DR: In this article, the basic concepts of multiple reflection X-ray optics were formulated and a broad angular aperture was shown, i.e., of the order of many times the angles of total external reflection.
Journal ArticleDOI
Focusing Polycapillary Optics and Their Applications
TL;DR: The focusing effects of polycapillary optics come from the overlap of the beams from thousands of small hollow glass tubes as discussed by the authors, which yields high gains in intensity and increased spatial resolution for a variety of clinical, lab-based, synchrotron or in situ analysis applications.
Journal ArticleDOI
Channeling of neutral particles in micro- and nanocapillaries
TL;DR: In this article, a general theory of radiation propagation through capil- lary structures is described in both geometrical optics and wave optics approximations, and a qualitative change in radiation scattering with decreasing channel diameter is discussed.
Journal ArticleDOI
Divergence behavior due to surface channeling in capillary optics
TL;DR: In this paper, the authors present results on x-ray scattering at grazing angles inside capillaries, which has been explained in the framework of the wave scattering theory by a decrease in the beam divergence behind the capillary structures.
Journal ArticleDOI
Surface roughness and the scattering of glancing‐angle x rays: Application to x‐ray lenses
J. C. Kimball,D. Bittel +1 more
TL;DR: In this paper, the effects of surface roughness on x-ray scattering were investigated, and the theoretical efficiency of x ray lenses formed from bundles of hollow glass fibers was analyzed.