Point spread function measurement of an X-ray beam focused by a multilayer zone plate with narrow annular aperture

Hidekazu Takano, Shigeki Konishi, Takahisa Koyama, Yoshiyuki Tsusaka, Satoshi Ichimaru, Tadayuki Ohchi, Hisataka Takenaka, Yasushi Kagoshima

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)446-448
Number of pages3
JournalJournal of Synchrotron Radiation
Volume21
Issue number2
DOIs
Publication statusPublished - 2014 Mar 1
Externally publishedYes

Keywords

  • Fresnel zone plate
  • X-ray focusing
  • computed tomography
  • line spread function
  • multilayer zone plate
  • point spread function

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Instrumentation

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