issue contents

Journal logoJOURNAL OF
ISSN: 1600-5775

May 2006 issue

Highlighted illustration

Cover illustration: The prism array X-ray lens clessidra developed at ELETTRA (Sincrotrone Trieste), see Jark, Pérennès and Matteucci, pages 239-252. Top: micrograph of the lens produced using deep X-ray lithography at the DXRL beamline at ELETTRA. The lens is made of pmma (polymethylmethacrylate = plexiglass) and consists of small prisms of height 25.67 µm and width 77.33 µm. The overall structure is 1.51 mm high, 2.6 mm wide and ~0.65 mm deep. Bottom: radiographs taken 30 mm downstream of the lens during the tilt alignment with a photon energy of 10 keV (tilt increment 1°). A CCD camera with 3.85 µm equivalent pixel size was used at the SYRMEP beamline at ELETTRA at a source distance of 22.6 m. In this lens the resist thickness varied in the beam direction.

facility information

research papers

J. Synchrotron Rad. (2006). 13, 227-238
doi: 10.1107/S0909049506004341
link to html
A detailed description of the ID23-1 structural biology beamline at the ESRF is given, with a description of the automated hardware and software environments for beamline staff and user community.

J. Synchrotron Rad. (2006). 13, 239-252
doi: 10.1107/S0909049506004936
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The limitations of the aperture of highly regular Fresnel X-rays lenses due to absorption, chromatic aberrations and the `thin lens' approximation are discussed. Experimental data for the refraction efficiency are interpreted.

J. Synchrotron Rad. (2006). 13, 253-259
doi: 10.1107/S0909049506006789
link to html
A calculation is presented to maximize the signal-to-noise ratio of an X-ray photon correlation spectroscopy beamline by finding the optimum detector pixel size, optimum collimation and optimum X-ray energy.

J. Synchrotron Rad. (2006). 13, 260-270
doi: 10.1107/S0909049506008983
link to html
Full characterization in terms of modulation transfer function, normalized noise power spectrum and detective quantum efficiency of a fast-readout low-noise (FReLoN) CCD camera coupled to a fiberoptical taper, a detector developed at the European Synchrotron Radiation Facility.

J. Synchrotron Rad. (2006). 13, 271-274
doi: 10.1107/S0909049506006972
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A synchrotron X-ray diffractometer incorporating a pulsed field magnet for high fields up to 40 T has been developed and a detailed description of this instrument is reported.

J. Synchrotron Rad. (2006). 13, 275-277
doi: 10.1107/S0909049506009058
link to html
First results on the reduction of iron oxide nanoparticles within a mesoporous carbon CMK-1 host structure are given. The thermochemical behaviour was monitored by temperature-dependent in situ X-ray absorption spectroscopic measurements. In summary, one can say that the kinetics of the reduction steps Fe2O3 → Fe3O4 → Fe1−xO → Fe0 are mainly affected by the particle size, as well as the spatial and chemical environment.

short communications

J. Synchrotron Rad. (2006). 13, 278-280
doi: 10.1107/S0909049506003888
link to html
Bragg backscattering of 10 keV X-rays from large commercial quartz crystals has shown low defect concentrations and experimental energy widths of 4.0 meV. Quartz thus appears to be a useful X-ray optical material, particularly for meV-resolution energy analyzers of X-rays with energy 12 keV or less.

J. Synchrotron Rad. (2006). 13, 281-284
doi: 10.1107/S0909049506004766
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X-ray diffraction patterns from a film of oriented purple membranes, which comprise two-dimensional crystals of bacteriorhodopsin trimers, were recorded with a 1 m-pathlength Guinier-type camera at SPring-8 BL40B2. Diffraction peaks were observed up to a resolution of 2.3 Å and a projected electron density map was calculated with intensities up to a spacing of 4.2 Å.

letters to the editor

J. Synchrotron Rad. (2006). 13, 285
doi: 10.1107/S0909049506008958

book reviews

J. Synchrotron Rad. (2006). 13, 287
doi: 10.1107/S0909049506008910

new commercial products

J. Synchrotron Rad. (2006). 13, 288
doi: 10.1107/S0909049506009861

current events

J. Synchrotron Rad. (2006). 13, 289-290
doi: 10.1107/S0909049506012969
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