  We describe a UHV setup for grazing incidence fast atom diffraction (GIFAD)
experiments. The overall geometry is simply a source of keV atoms facing an
imaging detector. Therefore, It is very similar to the geometry of RHEED
experiments, reflection high energy electron diffraction used to monitor growth
at surfaces. Several custom instrumental developments are described making
GIFAD operation efficient and straightforward. The difficulties associated with
accurately measuring the small scattering angle and the related calibration are
carefully analyzed.
