CASCADE with NRSE: Fast Intensity Modulation Techniques used in Quasielastic Neutron Scattering

Fast intensity modulation techniques require neutron detectors with a response time below 1μs, a demand which can not be fulfilled by standard neutron detector technology. Here we present the CASCADE neutron detector developed at the University of Heidelberg, which is based on stacked, thin ¹⁰B layers as neutron converters and particularly addresses these needs. After explaining the CASCADE concept in context with fast intensity modulation techniques we report on two test runs performed at the RESEDA spectrometer at FRM II, Munich, which indeed prove MHz time resolution in this spectrometer system with a reasonably high detection efficiency.