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| Home > Publications database > Soft X-ray grating monochromators as a source of spatial coherence degradation: A wave-optical approach |
| Journal Article/Contribution to a conference proceedings | PUBDB-2023-00011 |
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2022
IOP Publ.
Bristol
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Please use a persistent id in citations: doi:10.1088/1742-6596/2380/1/012072 doi:10.3204/PUBDB-2023-00011
Abstract: We present wave-optical simulations and a coherence analysis of the photon beam transported through a soft X-ray beamline, paying particular attention to a focusing varied line spacing (VLS) plane grating monochromator (PGM). We show that this beamline optical element used in several soft X-ray beamlines at synchrotron sources and free-electron lasers can cause a non-negligible spatial coherence degradation. We demonstrate that the origin of this effect arises from the coupling between spatial and spectral properties of the photon beam generated by the grating. The latter implies that space and frequency dependencies are not separable after such a dispersive element. It is shown which parameters are essential for this effect and how they are linked to each other.
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Book/Proceedings
Synchrotron radiation instrumentation: proceedings, 14th international conference, SRI 2021, Hamburg, Germany, March 28-April 1, 2022
Synchrotron Radiation Instrumentation, SRI 2021, HamburgHamburg, Germany, 28 Mar 2022 - 1 Apr 2022
Bristol : IOP, Journal of Physics: Conference Series 2380, (2022) [10.1088/1742-6596/2380/1/011001]
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