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  • 1995-1999  (3)
  • 1996  (3)
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  • 1995-1999  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Background reduction in experiments with x-ray glass capillary optics (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 4061-4063 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An analysis of the background at the exit of tapered borosilicate glass capillaries in synchrotron radiation scattering experiments suggests scattering due to short-range order at larger angles while low-angle scattering is attributed to phase separation in the glass. Background scattering can be largely suppressed by introducing a pinhole aperture at the exit of the capillary. The lowest background was obtained for a pinhole approaching the size of the exit beam. Background reduction is particularly important for wide- and small-angle scattering experiments on weakly scattering samples like thin polymeric fibers. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147551
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Submicrometer x-ray beam production by a thin film waveguide (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4471-4473 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A hard x-ray waveguide capable of reducing a 13 keV monochromatic beam in one direction from 30 to only 0.1 μm has been characterized with synchrotron radiation. The guiding structure consisted of a carbon layer sandwiched between two Ni layers sputter-deposited onto float glass. A beam exiting at the end of the guide in guiding direction was observed when a resonance effect due to the formation of x-ray standing waves in the total reflection region takes place. The measured beam divergence (1.3 mrad) agrees with expectations. The total efficiency (exiting photon flux/incident photon flux) can ideally exceed 10−2 but is only 10−4 for this first prototype. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361761
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Low-Angle Synchrotron Radiation Diffraction with Glass-Capillary Optics (1996)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 3 (1996), S. 97-100 
    Details
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The use of borosilicate-glass-capillary optics at a chosen wavelength for low scattering has been explored using an undulator beam at the ESRF. With a 2.3 μm beam at 0.092 nm wavelength, a silver behenate powder sample was scanned in two dimensions with a 2 μm step width. Scattering from single crystallites with d001 = 5.83 nm could be observed. The limit for observation, at low angles, was ca s ∼ 0.1 nm−1 (s = 1/d for d ∼ 10 nm).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0909049596001355
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    Paper (German National Licenses)
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