The TAS spectrometers offer a standard for quantitative measurements, allowing detailed observations, but only measure one excitation at a time. The modern trend is to simultaneously collect as many data points as possible. This makes it possible to map substantial regions of the reciprocal space without increasing the measuring time.

FlatCone is typical of this new approach. This TAS option combines a set of analyzers and detectors in a very compact design. It can be installed on the ILL TAS instruments IN8, IN14 and IN20.