Focusing of Soft X-rays Using Poly-capillary with Precise Adjustment Mechanism and Its Application to Quick Chemical-state Analysis

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  • 微調整機構付きポリキャピラリーを用いた軟X線の集光とその高速化学状態分析への応用
  • ビチョウセイ キコウ ツキ ポリキャピラリー オ モチイタ ナンXセン ノ シュウコウ ト ソノ コウソク カガク ジョウタイ ブンセキ エ ノ オウヨウ

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Abstract

A method for quick and real-time observations of a solid surface at nanometer scale is described. The principle of the method is as follows. Soft X-rays from a synchrotron light source are irradiated on a solid surface, and the total photoelectrons are expanded and focused on a screen using electrostatic lenses. When the energy of X-rays is scanned and the brightness is plotted, we can obtain micro X-ray absorption (micro-XAFS) spectra in all regions of the image. The spacial resolution of the method was 40 nm. In order to more quickly observe a microscopic image and measure micro-XAFS spectra, the soft X-rays from the bending magnet were focused using a newly developed poly-capillary. As a result, we succeeded in observing a clear image at 10 ms for a bulk sample. We have also tried to shorten the measuring time of the micro-XAFS spectrum. For a Si-SiO2 sample, it has been demonstrated that micro-XAFS spectra in all regions of an image can be obtained in the order of 10 sec. It is concluded that real-time observations of chemical-states at nanometer scale are possible by the present method.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 63 (1), 53-58, 2014

    The Japan Society for Analytical Chemistry

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