X-ray curved-crystal monochromator system at the storage ring DCI

Lemonnier, M.; Fourme, R.; Rousseaux, F.; Kahn, Richard

doi:10.1016/0029-554x(78)90259-8

Cited by 128 publications

(42 citation statements)

References 3 publications

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“…The instrument (Depautex et al, 1987) and the data-acquisition system (Bordas et al, 1980;Boulin, Kempf, Koch & McLaughlin, 1986) have already been described. The monochromatic beam is focused in the horizontal direction on to the detector in a focal spot typically 1 mm wide using a bent triangular Ge(ll 1) crystal mounted in the compressive Fankuchen geometry with a cut angle c~ = 10.5 ° (Lemonnier, Fourme, Rousseaux & Kahn, 1978). The wavelength of the X-rays was A = 1.488/~ (Ni absorption K-edge).…”

Section: Methodsmentioning

confidence: 99%

Improved Signal-to-Background Ratio in Small-Angle X-ray Scattering Experiments with Synchrotron Radiation using an Evacuated Cell for Solutions

Dubuisson¹,

Décamps²,

Vachette³

1997

J Appl Cryst

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An evacuated, temperature-controlled cell has been built for use on the small-angle X-ray scattering instrument D24 at the synchrotron radiation facility LURE. The sample is placed in a quartz capillary sealed in a stainless-steel holder using a vacuum-tight glue. Several O rings provide a vacuum path upstream and downstream from the cell, so that the X-ray beam only meets the capillary walls and the solution under study between the slits and the beam stop, while the sample is maintained under atmospheric pressure. The cell temperature is controlled via a water circulation through a copper sheath in tight contact with the steel holder. The use of this cell results in a marked reduction of the background, as observed in two series of parallel experiments using a conventional cell and this evacuated cell. The decrease ranges from a factor of 2 at s 1 values larger than 0.008 A,-to more than 15 at s --0.00116A -1, where s is the modulus of the scattering vector (s = 2sin 0/A, 20 is the scattering angle and A is the wavelength of the X-rays).

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Section: Methodsmentioning

confidence: 99%

Improved Signal-to-Background Ratio in Small-Angle X-ray Scattering Experiments with Synchrotron Radiation using an Evacuated Cell for Solutions

Dubuisson¹,

Décamps²,

Vachette³

1997

J Appl Cryst

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“…To demonstrate conditions under which the above simple description is satisfactory we measured the transmittance as a function of the radius of curvature (controlled by the push tip position) for waveguides made from thin Si(111) wafers, which were Syton polished to a hazefree mirror finish by Virginia Semiconductor, Inc. The waveguides were formed in triangular shapes to achieve approximately constant radius of curvature across the surface [9]. A monochromatic Mo K a x-ray beam from a rotating anode x-ray machine was coupled into the waveguide at a grazing angle (see Fig.…”

mentioning

confidence: 99%

Surface Trapped X Rays: Whispering-Gallery Modes atλ=0.7Å

Liu

Golovchenko

1997

Phys. Rev. Lett.

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“…This arrangement is based on the commonly used geometry introduced by Lemonnier et al [10] and developed by many groups [for example, see references 11 and 12 and references in 13]. The curved-crystal monochromators will be identical and will have an asymmetric-cut arrangement with a nominal compression factor of 10.…”

Section: Beamline Configurationmentioning

confidence: 99%

“…This movement will obscure the central station position .. In this case, taking into account optical, aberrations, the demagnification and the angular dispersion of the diffracted beam [10], the horizontal image size will be 0.3 mm (FWHM).…”

Section: Beamline Configurationmentioning

confidence: 99%

A beamline for macromolecular crystallography at the Advanced Light Source

Padmore

Earnest

Kim

et al. 1995

Review of Scientific Instruments

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A beamline for macromolecular crystallography has been designed for the ALS. The source will be a 37-pole wiggler with a 2-T on-axis peak field. The wiggler will illuminate three beamlines, each accepting 3 mrad of horizontal aperture. The central beamline will primarily be used for multiple-wavelength anomalous dispersion measurements in the wavelength range from 4 to 0.9 Å. The beamline optics will comprise a double-crystal monochromator with a collimating premirror and a double-focusing mirror after the monochromator. The two side stations will be used for fixed-wavelength experiments within the wavelength range from 1.5 to 0.95 Å. The optics will consist of a conventional vertically focusing cylindrical mirror followed by an asymmetrically cut curved-crystal monochromator. This paper presents details of the optimization of the wiggler source for crystallography, gives a description of the beamline configuration, and discusses the reasons for the choices made.

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X-ray curved-crystal monochromator system at the storage ring DCI

Cited by 128 publications

References 3 publications

Improved Signal-to-Background Ratio in Small-Angle X-ray Scattering Experiments with Synchrotron Radiation using an Evacuated Cell for Solutions

Improved Signal-to-Background Ratio in Small-Angle X-ray Scattering Experiments with Synchrotron Radiation using an Evacuated Cell for Solutions

Surface Trapped X Rays: Whispering-Gallery Modes atλ=0.7Å

A beamline for macromolecular crystallography at the Advanced Light Source

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