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A modern cold triple-axis spectrometer to study quantum condensed mattersystems is planned for the High Flux Isotope Reactor (HFIR) at Oak RidgeNational Laboratory. Here, we describe the conceptual principles and design ofa secondary spectrometer using a multiplexed, prismatic analyzer system relyingon graphite crystals and inspired by the successful implementation of theContinuous Angle Multiple Energy Analysis (CAMEA) spectrometers at the PaulScherrer Institute. This project is currently known as MANTA for Multi-analyzerNeutron Triple-Axis. We report Monte-Carlo ray-tracing simulations on a simplebut realistic sample scattering kernel to further illustrate the prismaticanalyzer concept's workings, calibration, and performance. Then, we introduce anew statistical analysis approach based on the prismatic analyzer concept toimprove the number of final energies measured on the spectrometer. We alsostudy possible evolutions in the CAMEA design relevant for MANTA.

Monte-Carlo ray-tracing studies of multiplexed prismatic graphite  analyzers for the cold-neutron triple-axis spectrometer at the High Flux  Isotope Reactor