Laminar and blazed type holographic gratings for a versatile soft x-ray spectrograph attached to an electron microscope and their evaluation in the 50-200 eV range

Takashi Imazono, Masato Koike, Tetsuya Kawachi, Noboru Hasegawa, Masaru Koeda, Tetsuya Nagano, Hiroyuki Sasai, Yuki Oue, Zeno Yonezawa, Satoshi Kuramoto, Masami Terauchi, Hideyuki Takahashi, Nobuo Handa, Takanori Murano, Kazuo Sano

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    Laminar and blazed type holographic varied-line-spacing spherical gratings for use in a versatile soft x-ray flat-field spectrograph attached to an electron microscope are designed, fabricated, and evaluated. The absolute diffraction efficiencies of laminar (or blazed) master and replica gratings at 86.00 incidence evaluated by synchrotron radiation show over 5% (or 8%) in the 50-200 eV range with the maxima of 22% (or 26%-27%). Also the resolving power evaluated by a laser produced plasma source is in excess of 700 at the energy near the K emission spectrum of lithium (̃55 eV) for all gratings. Moreover, the K emission spectrum of metallic Li with high spectral resolution is successfully observed with the spectrograph attached to a transmission electron microscope.

    Original languageEnglish
    Pages (from-to)2351-2360
    Number of pages10
    JournalApplied optics
    Volume51
    Issue number13
    DOIs
    Publication statusPublished - 2012 May 1

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics
    • Engineering (miscellaneous)
    • Electrical and Electronic Engineering

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