Production of quasimonochromatic X-ray microbeams using MeV-protons and a polycapillary X-ray half lens

DOI Web Site 参考文献14件
  • K. Ploykrachang
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Ookayama 2-12-1-N1-14, Meguro-ku 152-8550, Tokyo, Japan
  • H. Fukuda
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Ookayama 2-12-1-N1-14, Meguro-ku 152-8550, Tokyo, Japan
  • K. Kondo
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Ookayama 2-12-1-N1-14, Meguro-ku 152-8550, Tokyo, Japan
  • Y. Oguri
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Ookayama 2-12-1-N1-14, Meguro-ku 152-8550, Tokyo, Japan
  • J. Hasegawa
    Department of Energy Sciences, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuta-cho 4259-G3-35, Midori-ku 226-8502, Yokohama, Japan

抄録

<jats:p> In this paper, we have proposed monochromatic X-ray microbeams, produced by a proton-induced X-ray technique and a polycapillary X-ray half lens, as a tool for micro-X-ray fluorescence (XRF) analysis. A 30 μm thick planar Cu target was irradiated by a 2.5 MeV proton beam to produce Cu Kα X-rays (8.0 keV), and a polycapillary X-ray half lens was utilized to focus the X-rays emitted behind the Cu target. The focal spot size of the focused X-ray beam was 250 μm at full width at half maximum, which was verified using a knife-edge scanning method. The output focal distance and the depth of focus of the optics were measured to be 47 mm and 1 mm, respectively. A square grid pattern of Co thin films, formed on a thick Cu substrate by thermal evaporation, was used as a test sample for evaluation of the analytical performance of the micro-XRF setup. Two-dimensional mapping of the Co distribution on the Cu substrate was successful, and the spatial resolution was consistent with the beam spot size. For this Co layer, a minimum detection limit of 2.3 ng was achieved. </jats:p>

収録刊行物

参考文献 (14)*注記

もっと見る

関連プロジェクト

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ