22 November 1996 Monochromators for small cross-section x-ray beams from high heat flux synchrotron sources
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Abstract
For some x-ray experiments, only a fraction of the intense central cone of x-rays generated by high-power undulator sources can be used: the x-ray source emittance is larger than the useful emittance for the experiment. For example with microfocusing optics, or for coherence experiments, x- ray beams with cross sections less than 0.1 mm2 are desirable. With such small beams, the total thermal load is small even though the heat flux density is high. Analyses indicate that under these conditions, rather simple crystal cooling techniques can be used. We illustrate the advantages of a small beam monochromator, with a simple x-ray monochromator optimized for x-ray microdiffraction. This monochromator is designed to achieve negligible distortion when subjected to a narrow (0.1 mm wide) beam from a APS undulator A operating at 100 mA. It also allows for rapid and repeatable energy scans and rapid cycling between monochromatic and white beam conditions.
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Gene E. Ice, Gene E. Ice, Bernie Riemer, Bernie Riemer, Ali M. Khounsary, Ali M. Khounsary, } "Monochromators for small cross-section x-ray beams from high heat flux synchrotron sources", Proc. SPIE 2856, Optics for High-Brightness Synchrotron Radiation Beamlines II, (22 November 1996); doi: 10.1117/12.259879; https://doi.org/10.1117/12.259879
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