A Pulse-Multiplication Proposal for MIRACLES, the Neutron TOF-Backscattering Instrument at the European Spallation Source

The fixed-energy window scan approach, for both elastic and inelastic modes, is a valuable tool to discriminate between motions activated when dynamical phase transitions occur in sample as function of time, temperature, pressure, electrical field or illumination. Considering that, on one hand, such variations can generate weak signal, the other, high data throughput makes it possible screen many samples during beam pulse multiplication an ideal strategy optimize intensity analyzed signal. To ensure this capability, proposal future upgrade MIRACLES, neutron time-of-flight backscattering spectrometer at European Spallation Source (ESS) under construction Lund, reported article. concept new chopper layout relies extraction several pulses, ensuring increase total hitting sample. This be extended counterpart. premise maintain original beamline without modification, either guide sections current thereby guaranteeing that minimal changes impact will proposed upgrade. However, also presents significant challenge, namely, achieve efficient within width length rising/decay time pulses. With presented here, by factor 2.8 was obtained. analogous performing fixed (EFW) measurements with ESS source operating 14 MW, widening considerably performance capabilities MIRACLES. knowledge generated here design scientific instruments next generation low-energy, accelerator-driven sources.