Focusing options for a bending magnet beamline

Yujia Ding; Carlo Segre; Ali Khounsary

doi:10.1117/12.2568661

4 September 2020 Focusing options for a bending magnet beamline

Yujia Ding, Carlo Segre, Ali Khounsary

Proceedings Volume 11491, Advances in X-Ray/EUV Optics and Components XV; 114910E (2020) https://doi.org/10.1117/12.2568661
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

X-ray absorption spectroscopy experiments are the primary scientific focus of the MRCAT bending magnet beamline, 10-BM of the Advanced Photon Source at Argonne National Laboratory. This technique is used for ex situ and in situ structural characterization of materials, many of which are non-crystalline. An intense X-ray beam is often required for these experiments. This beamline presently operates using a detuned double crystal monochromator system without any focusing. Typically, samples are illuminated by a 0.5 x 0.5 mm² monochromatic beam with a photon flux in the range of 2 - 9 x 10⁸ photons/s (in the 5 - 33 keV range). In this study, several alternate focusing schemes to capture a large portion of the bending magnet beam are compared. It is shown that, in principle, one can obtain an increase over two orders of magnitude in photon flux. These beamline schemes are outlined comparing them for photon flux, energy resolution, cost, and complexity in design and operation.

Conference Presentation

Citation Download Citation

Yujia Ding, Carlo Segre, and Ali Khounsary "Focusing options for a bending magnet beamline", Proc. SPIE 11491, Advances in X-Ray/EUV Optics and Components XV, 114910E (4 September 2020); https://doi.org/10.1117/12.2568661

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