Operational backscattering spectrometers at reactors include IN10, IN13, and IN16B at the Institut Laue-Langevin, the High Flux Backscattering Spectrometer (HFBS) at the NIST Center for Neutron Research, 
the SPHERES instrument of Forschungszentrum Jülich at FRM II
and EMU at ANSTO.