IGUAPE, a graphical user interface for in situ/operando X-ray diffraction experiments at the PAINEIRA beamline: development and application

Synchrotron radiation X-ray diffraction facilities equipped with fast area detectors can generate X-ray diffraction (XRD) patterns in seconds. This capability is fundamental to revealing transient crystalline phases and the structural evolution of samples and devices for technology applications. However, it generates XRD patterns usually faster than the user can process during the experiment. Thus, an open-source and user-friendly software package named IGUAPE was developed for the PAINEIRA beamline (Sirius, Brazil). It allows visualization of the X-ray diffractograms as soon as the azimuthal integration of the Debye rings is processed and the XRD pattern is created. The software can also perform a single-peak qualitative analysis of the diffraction data. Upon selecting a diffraction peak in the XRD pattern, the peak position, integrated area and full width at half-maximum variation during the in situ or operando experiment are given.