Publication

Accurate simulations of magnetic excitations in the neutron simulation package McStas

2026

Abstract

An algorithm for the accurate simulation of neutron scattering from magnetic excitations has been developed and implemented as new component for the neutron ray-tracing software McStas. The component SpinWave_BCO simulates inelastic neutron scattering from ferro-, antiferro- and altermagnetic excitations in a body-centred orthorhombic crystal structure, where the dispersion relation and scattered neutron intensities are derived using linear spin wave theory. Data from a simulated triple-axis spectrometer with an extremely high resolution have been verified by direct comparison with theory and by comparison with data simulated using the package SpinW. The component serves as a proof of concept for the implementation of a more general linear spin wave component in McStas.

Official source

https://infoscience.epfl.ch/entities/publication/7cd5acbc-c1f5-4fb3-86bd-5a8639d1b9b3

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7cd5acbc-c1f5-4fb3-86bd-5a8639d1b9b3

About this result

Related concepts (32)

Simulation

A simulation is the imitation of the operation of a real-world process or system over time. Simulations require the use of models; the model represents the key characteristics or behaviors of the selected system or process, whereas the simulation represents the evolution of the model over time. Often, computers are used to execute the simulation. Simulation is used in many contexts, such as simulation of technology for performance tuning or optimizing, safety engineering, testing, training, education, and video games.

Neutron scattering

Neutron scattering, the irregular dispersal of free neutrons by matter, can refer to either the naturally occurring physical process itself or to the man-made experimental techniques that use the natural process for investigating materials. The natural/physical phenomenon is of elemental importance in nuclear engineering and the nuclear sciences. Regarding the experimental technique, understanding and manipulating neutron scattering is fundamental to the applications used in crystallography, physics, physical chemistry, biophysics, and materials research.

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A computer architecture simulator is a program that simulates the execution of computer architecture. Computer architecture simulators are used for the following purposes: Lowering cost by evaluating hardware designs without building physical hardware systems. Enabling access to unobtainable hardware. Increasing the precision and volume of computer performance data. Introducing abilities that are not normally possible on real hardware such as running code backwards when an error is detected or running in faster-than-real time.

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Accurate simulations of magnetic excitations in the neutron simulation package McStas

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