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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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Imaging extreme ultraviolet spectrometer employing a single toroidal diffraction grating: the initial evaluation.

M C Huber, J G Timothy, J S Morgan

    Applied Optics
    |June 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new extreme ultraviolet (EUV) imaging spectrometer was built using a novel toroidal grating fabrication method. This high-efficiency instrument demonstrates excellent image quality for astrophysical applications.

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    Area of Science:

    • Astrophysics
    • Optical Engineering
    • Spectroscopy

    Background:

    • Extreme ultraviolet (EUV) astronomy requires specialized imaging spectrometers.
    • Existing instruments face limitations in efficiency and image quality.

    Purpose of the Study:

    • To construct and test a high-efficiency EUV imaging spectrometer.
    • To develop a novel fabrication technique for toroidal gratings.
    • To assess the instrument's suitability for astrophysical research.

    Main Methods:

    • Utilized a concave toroidal grating at normal incidence in a Rowland circle mounting.
    • Developed a new technique for fabricating toroidal gratings via elastic deformation and replication.
    • Conducted photographic and photoelectric tests with a 2-D pulse-counting detector.

    Main Results:

    • Verified high image quality of the toroidal grating near 600 Angstroms.
    • Demonstrated the effectiveness of the novel grating fabrication method.
    • Confirmed the spectrometer's high efficiency.

    Conclusions:

    • The developed EUV imaging spectrometer is a high-efficiency instrument with excellent image quality.
    • The novel toroidal grating fabrication technique is successful.
    • The spectrometer is suitable for astrophysical investigations, including solar and nonsolar object studies.