Advanced Controller Upgrade in a Double Crystal Monochromator at the SIRIUS Beamline in Synchrotron SOLEIL.

The SIRIUS beamline at Synchrotron Soleil, utilizing the energy range between 1.4-13 keV, provides tools to do structural study of condensed matter. The beamline, here mounted on an HU36 undulator source with two monochromators, is suitable of providing x-ray characterization techniques such as: grazing incidence x-ray diffraction (GIXRD), small angle scattering (GISAXS) at fixed energy, and anomalous x-ray diffraction (AXD) and spectroscopies (XAFS, DAFS) in energy scans. Recently, the SIRIUS beamline had their Double Crystal Monochromator control system (black-box and ready-to-use) replaced and upgraded. This was a decision made to facilitate easier system maintenance and add new functionalities such as continuous scanning with the possibility of low-level kinematic conversions (for energy scans); all while adhering to standardized control solutions supported by the Electronics and Control- group in Synchrotron SOLEIL. The flexibility and modularity of the new system, here based on the Delta Tau PMAC platform allowed for interfacing with non-standard black-boxed motorized systems. We will here present; the architecture with its modular MACRO field bus communication protocol and how it can be extended to implement control over exotic motorized systems in a standard way, as well as results from step scans and continuous energy scans using low-level kinematic conversions. [ABSTRACT FROM AUTHOR]