No abstract

This article summarizes the contributions in this special issue on DiffractionLimited Storage Rings. It analyses the progress in accelerator technology enabling a significant increase in brightness and coherent fraction of the X-ray light provided by storage rings. With MAX IV and Sirius there are two facilities under construction that already exploit these advantages. Several other projects are in the design stage and these will probably enhance the performance further. To translate the progress in light source quality into new science requires similar progress in aspects such as optics, beamline technology, detectors and data analysis. The quality of new science will be limited by the weakest component in this value chain. Breakthroughs can be expected in high-resolution imaging, microscopy and spectroscopy. These techniques are relevant for many fields of science; for example, for the fundamental understanding of the properties of correlated electron materials, the development and characterization of materials for data and energy storage, environmental applications and bio-medicine.

No abstract

Articles you may be interested inThe strain models of misfit dislocations at cubic semiconductors hetero-interfaces Appl.The acting slip mechanism for the generation of misfit dislocations in diamond-typesemiconductor heterostructures is investigated with transmission electron microscopy. It is shown that dissociation ofthe 60°-mixed dislocations can lead to a difference in strain accommodation for tensile and compressive strain. A strain/thickness relation is obtained from the energy expression for nucleation of half-loops. This relation is compared with other theoretical relations and with experimental strain data for Si/GaP (00 1) and IIlomGa(l.93As/GaAs(OOl), measured with transmission electron microscopy and ion blocking.4413

Acknowledgements. I thank colleagues at Berkeley, Cambridge and Durham for stimulating conversations; L. Moustakas for assisting with the use of image analysis software; R. Bouwens for providing code to manipulate stellar populations models; and D. Hogg for providing data in tabular form. This work has been supported by NASA grants.