Treffer: PGMweb: an online tool for visualizing the X‐ray beam path through plane grating monochromators.

We present here a newly developed software tool (called PGMweb) for computing and simulating the X‐ray beam path through a plane grating monochromator (PGM), a key component in soft X‐ray beamlines at modern synchrotron and free‐electron laser facilities. A historical overview of the development of PGMs is presented, with special attention dedicated to the collimated PGM optical scheme found at several X‐ray facilities worldwide. The analytical expressions that fully describe the geometry of a PGM are derived and have been implemented as functions in a Python library (pyplanemono). PGMweb is distributed as a web‐based application that can be run in any modern browser without installation, making its use very straightforward for X‐ray beamline designers and beamline scientists alike. [ABSTRACT FROM AUTHOR]

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