  The ability to non-destructively measure the structural properties of
devices, either in situ or operando, are now possible using an intense X-ray
synchrotron source combined with specialized equipment. This tool attracted
researchers, in particular metallurgists, to attempt more complex and ambitious
experiments aimed at answering unresolved questions in formation mechanisms,
phase transitions, and magnetism complex alloys for industrial applications. In
this paper, we introduce the diffraction diffusion anomale multi-longueur
d'onde (D2AM) beamline, a French collaborating research group (CRG) beamline at
the European Synchrotron Radiation Facility (ESRF), partially dedicated to in
situ X-ray scattering experiments. The design of the beamline combined with the
available equipment (two-dimensional fast photon counting detectors,
sophisticated high precision kappa diffractometer, a variety of sample
environments, continuous scanning for X-ray imaging, and specific software for
data analysis) has made the D2AM beamline a highly efficient tool for advanced,
in situ synchrotron characterization in materials science, e.g., single crystal
or polycrystalline materials, powders, liquids, thin films, or epitaxial
nanostructures. This paper gathers the main elements and equipment available at
the beamline and shows its potential and flexibility in performing a wide
variety of temporally, spatially, and energetically resolved X-ray synchrotron
scattering measurements in situ.
