A hierarchical approach for modeling X‐ray beamlines: application to a coherent beamline

Different approaches to simulate a modern X‐ray beamline are considered. Several methodologies with increasing complexity are applied to discuss the relevant parameters that quantify the beamline performance. Parameters such as flux, dimensions and intensity distribution of the focused beam, and coh...

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Bibliographic Details
Published in:Journal of synchrotron radiation 2019-11, Vol.26 (6), p.1887-1901
Main Authors: Sanchez del Rio, Manuel, Celestre, Rafael, Glass, Mark, Pirro, Giovanni, Herrera, Juan Reyes, Barrett, Ray, da Silva, Julio Cesar, Cloetens, Peter, Shi, Xianbo, Rebuffi, Luca
Format: Article
Language:English
Subjects:
Algorithms
beamline
Coherence
Computer simulation
Electromagnetism
Emittance
Engineering Sciences
Ion beams
Optics
Parameters
Photonic
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Propagation modes
Signal and Image processing
simulations
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Summary:Different approaches to simulate a modern X‐ray beamline are considered. Several methodologies with increasing complexity are applied to discuss the relevant parameters that quantify the beamline performance. Parameters such as flux, dimensions and intensity distribution of the focused beam, and coherence properties are obtained from simple analytical calculations to sophisticated computer simulations using ray‐tracing and wave optics techniques. A latest‐generation X‐ray nanofocusing beamline for coherent applications (ID16A at the ESRF) has been chosen to study in detail the issues related to highly demagnifying synchrotron sources and exploiting the beam coherence. The performance of the beamline is studied for two storage rings: the old ESRF‐1 (emittance 4000 pm) and the new ESRF‐EBS (emittance 150 pm). In addition to traditional results in terms of flux and beam sizes, an innovative study on the partial coherence properties based on the propagation of coherent modes is presented. The different algorithms and methodologies are implemented in the software suite OASYS. These are discussed with emphasis placed upon the their benefits and limitations of each. A hierarchical scheme of the calculations of an X‐ray beamline for coherent applications is presented. Starting from simple calculations to partial coherence calculations, ray‐tracing and wave optics software are applied to simulate the beamline performances.
ISSN:1600-5775
0909-0495
1600-5775
DOI:10.1107/S160057751901213X