A new neutron spin–echo spectrometer with time-gradient magnetic fields: First experimental test

Results of the first neutron test of a new neutron-spin echo (NSE) spectrometer based upon the use of time-gradient magnetic fields are presented: observed performance is in a very good agreement with theoretical predictions. The main advantage of this new NSE technique is a practical absence of limits on the shape and size of the spin turners that principally allows for the realization of rather long coils for the high tilt angles required for the phonon-focusing NSE method, cylindrical coils required for the wide angle NSE spectroscopy with a simultaneous data acquisition in a broad Q-range, etc.