Development of a flat-field spectrograph with a wide-band multilayer grating and prefocusing mirror covering 2-4 keV

T. Imazono, M. Koike, N. Hasegawa, M. Koeda, T. Nagano, H. Sasai, Y. Oue, Z. Yonezawa, S. Kuramoto, M. Terauchi, H. Takahashi, N. Handa, T. Murano

    Research output: Contribution to journalConference articlepeer-review

    2 Citations (Scopus)

    Abstract

    A flat-field spectrograph equipped with a wide-band multilayer grating and prefocusing mirror covering 2-4 keV without any mechanical movement has been developed. To realize this, a new multilayer structure consisting of W and B4C layers has been invented, which enhances the diffraction efficiency of the grating over the whole energy range at a fixed angle of incidence as well as the reflectivity of the prefocusing mirror. The multilayer has been deposited on a laminar-type varied-line-spacing holographic replica grating and a spherical mirror substrate. The diffraction efficiency of the multilayer grating varies between 1.2% and 3.3% at 88.65° in the 2.1-4.0 keV range. Also the reflectivity of the prefocusing mirror varies between 2.7% and 12% at 88.00° in the same range. The overall throughput of the spectrograph with the multilayer optics is 104 times higher than that of gold-coated optics.

    Original languageEnglish
    Article number152008
    JournalJournal of Physics: Conference Series
    Volume425
    Issue numberPART 15
    DOIs
    Publication statusPublished - 2013
    Event11th International Conference on Synchrotron Radiation Instrumentation, SRI 2012 - Lyon, France
    Duration: 2012 Jul 92012 Jul 13

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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