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Proceedings Paper

Revisiting the "forgotten" first zoomable refractive x-ray lens
Author(s): Werner Jark; Luigi Rigon; Kevin Oliver
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Paper Abstract

In 1948 Kirkpatrick and Baez showed that two crossed mirrors in a tandem configuration with concave surfaces can focus hard x-rays by reflection. Right afterwards in 1949 Kirkpatrick showed theoretically that x-rays can also be focused by refraction, when they are transmitted through a similar system, i.e. in conditions, when the reflectivity at the concave interface is negligible. He performed an experiment, in which he refracted an x-ray beam at grazing incidence at such a curved interface in one direction. Consequently this was the first reported practical use of a refractive x-ray lens. The experiment was forgotten. Here we compare more systematically the focusing in such devise with the expectations. We propose the use in a flat field spectrometer, which could provide better spectral resolution for fluorescence analysis than the commonly used Si drift diodes, however, on the expense of a rather low efficiency. The application of the system may thus be limited to the spectral characterisation of x-ray sources.

Paper Details

Date Published: 28 September 2011
PDF: 11 pages
Proc. SPIE 8139, Advances in X-Ray/EUV Optics and Components VI, 81390G (28 September 2011); doi: 10.1117/12.896425
Show Author Affiliations
Werner Jark, Sincrotrone Trieste S.C.p.A. (Italy)
Luigi Rigon, Istituto Nazionale di Fisica Nucleare (Italy)
Kevin Oliver, Diamond Detectors Ltd (United Kingdom)

Published in SPIE Proceedings Vol. 8139:
Advances in X-Ray/EUV Optics and Components VI
Christian Morawe; Ali M. Khounsary; Shunji Goto, Editor(s)

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