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Fundamental characteristics of polycapillary x‐ray optics combined with glass conical pinhole for micro x‐ray fluorescence spectrometry
Author(s) -
Matsuda Akinori,
Nakano Kazuhiko,
Komatani Shintaro,
Ohzawa Sumito,
Uchihara Hiroshi,
Tsuji Kouichi
Publication year - 2009
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1160
Subject(s) - microbeam , pinhole (optics) , optics , x ray , materials science , x ray fluorescence , aperture (computer memory) , fluorescence , analytical chemistry (journal) , physics , chemistry , acoustics , chromatography
Abstract We have developed a new micro x‐ray fluorescence spectrometry (µ‐XRF) instrument using polycapillary x‐ray lens (PCXL) combined with glass conical pinhole (GCP). The x‐rays focused by the PCXL were focused again by the GCP. The size of the obtained x‐ray microbeam was estimated by a wire scanning method. In our instrument, the size of the x‐ray microbeam end was 25 µm for Cr Kα at 0.5 mm from the GCP. The divergence angle of x‐ray microbeam was 15 mrad. In order to evaluate the performance of our instrument, the gain (x‐ray flux density) was estimated. The gain in our instrument was corrected by comparison of the intensity per unit area for a Cu pinhole aperture. The gain thus obtained was approximately 1400. This highly intense micro x‐ray beam will be useful for micro‐XRF analysis. Copyright © 2009 John Wiley & Sons, Ltd.