issue contents

Journal logoJOURNAL OF
ISSN: 1600-5775

March 2007 issue

Highlighted illustration

Cover illustration: False-colour images created by chemically selective patterning of a polymethylmethacrylate-polyacrylonitrile (PMMA/PAN) bilayer by focused soft X-rays in the beamline 5.3.2 scanning transmission X-ray microscope at the Advanced Light Source (see Wang, Stöver, Hitchcock and Tyliszczak, pages 181-190). Top: logo of Lawrence Berkeley National Laboratory (left) and logo of the Canadian Light Source (right). PMMA = red, PAN = blue. Bottom left: Smokie the cat. PMMA = brown, PAN grey. Bottom right: grey-scale colour-separated image used as source for the patterned image of Smokie (courtesy of S. G. Urquhart). Scale bars = 1 µm.

facility information

research papers

J. Synchrotron Rad. (2007). 14, 181-190
doi: 10.1107/S0909049506053829
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A bilayer of two polymers (PMMA/PAN) was successfully patterned at ∼150 nm spatial resolution in a chemically selective manner by using tuned synchrotron X-rays focused by a Fresnel zone plate in a scanning transmission X-ray microscope.

J. Synchrotron Rad. (2007). 14, 191-195
doi: 10.1107/S0909049507004803
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A fully automated procedure for detecting and centering protein crystals in the X-ray beam of a macromolecular crystallography beamline has been developed. Because the procedure is based on the number of `good' diffraction spots, the best diffracting part of the crystal is aligned to the X-ray beam.

J. Synchrotron Rad. (2007). 14, 196-203
doi: 10.1107/S0909049507003846
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A two-beam interferometer for hard X-rays has been used to determine the coherence properties of synchrotron radiation up to 50 keV.

J. Synchrotron Rad. (2007). 14, 204-211
doi: 10.1107/S0909049507003962
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The use of Si saw-tooth refractive lenses to focus and collimate high-energy X-rays (50–100 keV) at the APS 1-ID beamline is described.

J. Synchrotron Rad. (2007). 14, 212-218
doi: 10.1107/S0909049507003007
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The total soft X-ray and EUV power which can be emitted by a transition radiation target in the storage rings MIRRORCLE-6X and MIRRORCLE-20SX is estimated. The calculations are performed based on experimental transition radiation data from MIRRORCLE-6X, using optimized one-foil targets, and operating the storage rings at full power.

J. Synchrotron Rad. (2007). 14, 219-226
doi: 10.1107/S0909049507001112
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Br in fluid-inclusion-hosted CO2-bearing solutions exhibits a pre-edge peak not found in CO2-free Br-bearing solutions. The peak is attributed to the effects of CO2 on the hydration and hence the charge density of Br ions in solution.

laboratory notes

J. Synchrotron Rad. (2007). 14, 227-228
doi: 10.1107/S0909049507004050
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A two-step focusing set-up combining a Fresnel zone plate with an ellipsoidal capillary is presented. An X-ray beam with 15 keV energy was focused down to 250 nm, demonstrating the best spot size that has been achieved up to now for single-bounce capillaries.

current events

J. Synchrotron Rad. (2007). 14, 229-231
doi: 10.1107/S0909049507006097
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