Development of Time-Resolved X-ray Fluorescence Spectroscopy System using an X-ray Tube Driven by Ultrafast Pulsed Laser

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  • 超短パルスレーザー駆動Ｘ線管を用いた時間分解蛍光Ｘ線分光システムの開発
  • チョウタンパルス レーザー クドウ Xセンカン オ モチイタ ジカン ブンカイ ケイコウ Xセン ブンコウ システム ノ カイハツ

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Abstract

A femtosecond-laser-driven X-ray source and an X-ray focusing system have been developed for the time-resolved X-ray fluorescence spectroscopy. The X-ray source, in which a plasma cathode induced by a 1013-W/cm2 laser pulse serves as an electron source of an X-ray tube, provides 109 Cu Kα photons in 4πsr per pulse. The X-ray pulse duration is measured to be about two hundred nanoseconds. Emission analysis of the plasma cathode indicates that the temporal characteristics of the X-ray pulse are determined by the dynamics of the plasma particles under the electrostatic shielding against the applied voltage in the X-ray tube. As for the X-ray focusing system, a focal spot size by a polycapillary lens is measured and the enhancement of X-ray fluorescence intensity due to the lens is demonstrated.

Journal

  • Hyomen Kagaku

    Hyomen Kagaku 29 (7), 413-417, 2008

    The Surface Science Society of Japan

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