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  • 1
    Online Resource
    Online Resource
    The high-flux beamline at the ESRF
    AIP Publishing ; 1992
    In:  Review of Scientific Instruments Vol. 63, No. 1 ( 1992-01-01), p. 438-441
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 63, No. 1 ( 1992-01-01), p. 438-441
    Abstract: The high-flux beamline at the ESRF will be one of the first beamlines and will be available to users at the start of ESRF operation in 1994. It will provide a highly monochromatic photon flux with very low divergence through a small sample. The brilliance of the photon beam will be much higher than at existing sources. The optics is optimized for ultrasmall angle x-ray scattering experiments and biological macromolecular crystallography at 12 keV. This corresponds to a wavelength of about 0.1 nm. An undulator with a period of 46 mm and a maximum deflection parameter K of 2.08 has been chosen as an insertion device. The optics will consist of a cryogenically cooled Si(111) double monochromator followed by a double focusing mirror. In this paper the planned setup of the beamline is described. The optical properties have been studied with the ray-tracing program shadow.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1142724
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1992
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 2
    Online Resource
    Online Resource
    High-brilliance Beamline at the European Synchrotron Radiation Facilitya)
    AIP Publishing ; 1995
    In:  Review of Scientific Instruments Vol. 66, No. 2 ( 1995-02-01), p. 1636-1638
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 66, No. 2 ( 1995-02-01), p. 1636-1638
    Abstract: The High-brilliance Beamline at the European Synchrotron Radiation Facility is under commissioning. First official user experiments are scheduled for September 1994. During the last months the beamline optics has been installed and extensively tested. Currently, the two end stations, (a) for macromolecular crystallography and (b) for time-resolved ultrasmall-angle x-ray scattering are under construction. This article presents the final optical setup of the beamline and describes the end stations. The actual performance of the undulator, the cryogenically cooled Si-(111) channel-cut monochromator, and the toroidal mirror are discussed. All results are in very good agreement with previously published theoretical calculations. Now, at the sample position a focused monochromatic beam is available between 0.15 nm (8 keV) and 0.077 nm wavelength (16 keV). At 0.1 nm wavelength the beam size is horizontally 0.38 mm and vertically 0.75 mm (full width at half-maximum) with a photon flux density of 2.5×107 photons/s/μm2 (±30%).
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1145868
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1995
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 3
    Online Resource
    Online Resource
    Rotational dynamics of colloidal hexaferrite nanoplates
    AIP Publishing ; 2018
    In:  Applied Physics Letters Vol. 113, No. 11 ( 2018-09-10)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 113, No. 11 ( 2018-09-10)
    Abstract: Here, we report an experimental study on the rotational dynamics of hard magnetic hexaferrite nanoparticles in water. A stable aqueous colloid of SrFe12O19 was synthesized by the borate glass-ceramic dissolution technique and studied by TEM, small-angle X-ray scattering (SAXS), magnetometry, and optical transmission methods in applied DC and AC magnetic fields. The particles represent nanoplates with a mean diameter of 50 nm and a mean thickness of 5 nm having a coercive force of 4700 Oe and a saturation magnetization of 51.5 emu/g. According to magnetic field dependent SAXS data, a probability orientation function was suggested considering the colloidal particle rotation in the applied field as an activation-free process. The magnetization dynamics of the colloidal rotators was described by an interplay of magnetic torque and drag force in the frame of a non-interacting particle model. At frequencies below 100 Hz, the particles are able to fully rotate after the magnetic field. At higher frequencies, the complete following becomes impossible due to the energy dissipation and the particle movement changes to oscillations around randomly oriented axes. These vibrational axes can be aligned by a strong external permanent magnetic field, causing the coherent particle oscillations and correspondingly the rise of the high-frequency response of the colloid optical transmission. As a result, the efficient magneto-optical light modulation has been achieved at frequencies exceeding 5 kHz, revealing the fastest response rates among known colloidal magneto-optical media.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.5044728
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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