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Figure 2
ID29 X-ray source, beam size and flux at the sample position. (a) The output spectra of the two undulators (U35 green, U21 blue) that currently serve as radiation sources [photons s−1 (0.1% bandwidth)−1 through a 3 mm (H) × 1 mm (V) pinhole at 30 m]. Also shown (green) is the output spectrum of an in-air 3.2 m ESRF U35 undulator with 11 mm minimum gap. (b) Three-dimensional profile of the X-ray beam at the sample position. Intensity is shown in arbitrary units. (c) Photon flux (photons s−1) at the sample position as a function of energy and beam-defining aperture used.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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