The spin precession resonance spectrometer

We present the concept of a new neutron scattering instrument to be used at a pulsed neutron source. The machine, which starts as a development of the resonance detector spectrometer and incorporates the basic ideas of spin precession energy analysis, is suited for the study of medium- and high-energy excitations in solids and liquids, particularly at small momentum transfers. The most novel characteristic of its performance is a high resolving power, achieved without appreciable loss of neutron flux. In an alternative operation (and sacrificing resolution) the instrument is capable of separating spin-dependent from spin-independent scattering processes. (orig.)