2,427 research outputs found
Prompt: Probability-Conserved Cross Section Biasing Monte Carlo Particle Transport System
An open source software package for simulating thermal neutron propagation in
geometry is presented. In this system, neutron propagation can be treated by
either the particle transport method or the ray-tracing method. Supported by an
accurate backend scattering physics engine, this system is capable of
reproducing neutron scattering experiments in complex geometries and is
expected to be used in the areas of instrument characterisation, optimisation
and data analysis.
In this paper, the relevant theories are briefly introduced. The simulation
flow and the user input syntax to control it are provided in detail. Five
benchmarking simulations, focusing on different aspects of simulation and
scattering techniques, are given to demonstrate the applications of this
simulation system. They include an idealised total scattering instrument, a
monochromatic powder diffractometer, a neutron guide, a chopper and an imaging
setup for complex geometries. Simulated results are benchmarked against
experimental data or well-established software packages when appropriate. Good
agreements are observed.Comment: 71 pages, 32 figure
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