Monte-Carlo Ray-Tracing Studies on Multiplexing Prismatic Analyzers for Implementation on MANTA at the High Flux Isotope Reactor

Condensed matter physics has been revolutionized by the 1956 invention of the Nobel prize-winning triple-axis spectrometer. The latest development in triple-axis spectroscopy is the use of so-called multiplexing analyzer systems, seen at several neutron scattering laboratories and most recently at the Swiss Neutron Source’s instrument CAMEA [2]. By using multiplexing analyzers, CAMEA is able to greatly improve upon the detection efficiency of a traditional triple-axis by using the combination of multiple analyzers and position-sensitive detectors to provide energy-resolved measurements. Oak Ridge National Laboratory aims to utilize this technology, along with further developments, for a next generation triple-axis spectrometer known as the Multi-Analyzer Neutron Triple Axis (MANTA). An optimal way to design a neutron scattering instrument is to use Monto-Carlo simulation programs, such as McStas. This talk will focus on in-silico optimization of the prismatic analyzer concept, to simultaneously optimize MANTA’s future hardware design and data analysis technique.