COMSYL makes the coherent mode decomposition of synchrotron radiation emitted by electrons passing through an undulator placed in a storage ring. COMSYL permits naturally the statistical analysis and propagation of the cross spectral density along the beamline optics. The coherence properties of the X-ray beam at any point of the beamline are completely given in terms of the eigenvalues and coherent modes of the cross spectral density.
An example of coherent mode decomposition of undulator radiation (U18 1.4m long undulator at resonance 17225 eV) at the ESRF-EBS calculated with COMSYL is here: https://youtu.be/h24RrJZaQ80
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Coherent modes of X-ray beams emitted by undulators in new storage rings
Mark Glass and Manuel Sanchez del Rio
EPL, 119 3 (2017) 34004
DOI: https://doi.org/10.1209/0295-5075/119/34004
Free preprint: https://arxiv.org/abs/1706.04393
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PhD Dissertation:
Mark Glass
Statistical optics for synchrotron emission: numerical calculation of coherent modes
See the Wiki pages https://github.com/mark-glass/comsyl/wiki for more information