期刊
JOURNAL OF APPLIED CRYSTALLOGRAPHY
卷 51, 期 -, 页码 1511-1524出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600576718012748
关键词
small-angle X-ray scattering; SAXS; ultra-small-angle X-ray scattering; USAXS; X-ray photon correlation spectroscopy; XPCS; time-resolved X-ray scattering
资金
- ESRF
This article presents the main technical features and performance of the upgraded beamline ID02 at the ESRF. The beamline combines different small-angle X-ray scattering techniques in one unique instrument, enabling static and kinetic investigations from angstrom to micrometre size scales and time resolution down to the sub-millisecond range. The main component of the instrument is an evacuated detector tube of length 34m and diameter 2m. Several different detectors are housed inside a motorized wagon that travels along a rail system, allowing an automated change of the sample-detector distance from about 1 to 31m as well as selection of the desired detector. For optional combined wide-angle scattering measurements, a wide-angle detector is installed at the entrance cone of the tube. A scattering vector (of magnitude q) range of 0.002 q 50nm(-1) is covered with two sample-detector distances and a single-beam setting for an X-ray wavelength of 1 angstrom. In the high-resolution mode, two-dimensional ultra-small-angle X-ray scattering patterns down to q < 0.001nm(-1) can be recorded, and the resulting one-dimensional profiles have superior quality as compared to those measured with an optimized Bonse-Hart instrument. In the highest-resolution mode, the beam is nearly coherent, thereby permitting multispeckle ultra-small-angle X-ray photon correlation spectroscopy measurements. The main applications of the instrument include the elucidation of static and transient hierarchical structures, and nonequilibrium dynamics in soft matter and biophysical systems.
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