Point spread function measurement of an X‐ray beam focused by a multilayer zone plate with narrow annular aperture. (24th January 2014)

• Record Type: Journal Article
• Authors: Takano, Hidekazu; Konishi, Shigeki; Koyama, Takahisa; Tsusaka, Yoshiyuki; Ichimaru, Satoshi; Ohchi, Tadayuki; Takenaka, Hisataka; Kagoshima, Yasushi
• Is Part Of: Journal of synchrotron radiation. Volume 21:Part 2(2014)
• Page Start: 446
• Page End: 448
• Publication Date: 2014-01-24
• Subjects: Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577513034644
• Languages: English
• ISSNs: 0909-0495

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The experimental procedure for obtaining the point spread function (PSF) of a focusing beam generated using an X‐ray multilayer zone plate (MZP) with a narrow annular aperture has been developed. It was possible to reconstruct the PSF by applying the tomographic process to the measured dataset consisting of line spread functions (LSFs) in every radial direction on the focal plane. The LSFs were measured by a knife‐edge scanning method of detecting scattered intensity. In the experimental work, quasi‐monochromatic undulator radiation with a first harmonic energy of 20 keV was directly focused without a monochromator by the MZP, and the PSF was measured using this procedure. As a result, a near diffraction‐limited focused beam size of 46 nm full width at half‐maximum was obtained.</p> </abstract>