  The CAMEA ESS neutron spectrometer is designed to achieve a high detection
efficiency in the horizontal scattering plane, and to maximize the use of the
long pulse European Spallation Source. It is an indirect geometry
time-of-flight spectrometer that uses crystal analysers to determine the final
energy of neutrons scattered from the sample. Unlike other indirect gemeotry
spectrometers CAMEA will use ten concentric arcs of analysers to analyse
scattered neutrons at ten different final energies, which can be increased to
30 final energies by use of prismatic analysis. In this report we will outline
the CAMEA instrument concept, the large performance gain, and the potential
scientific advancements that can be made with this instrument.
