13–17 Apr 2026
Clarion Hotel Malmö Live
Europe/Stockholm timezone

Update on the NCrystal project for modelling thermal neutron interactions

13 Apr 2026, 15:30
20m
Live 1 (Clarion Hotel Malmö Live)

Live 1

Clarion Hotel Malmö Live

Oral Presentation Technical talks

Speaker

Thomas Kittelmann (European Spallation Source DMSC)

Description

The NCrystal project provides an ambitious Monte Carlo backend for modelling thermal neutron interactions within many kind of materials, and includes a range of both inelastic and elastic scattering models. Users can choose from a large pre-existing library of material definitions, or define new materials using a range of built-in facilities for configuration and inspection. Usage of NCrystal is supported in a variety of Monte Carlo transportation applications, from neutron instrument simulation codes like McStas and Vitess, to multi-particle codes like OpenMC, Geant4, and MCNP. Additionally, NCrystal can be used directly, for instance via Python or commandline APIs, and supports interactions with established formats like CIF or ENDF.

This contribution aims to provide an overview of NCrystal, focusing on recent updates concerning integrations with other codes, deployment and packaging, as well as information about new physics models currently under development.

Authors

Thomas Kittelmann (European Spallation Source DMSC) José Ignacio Marquez Damian (European Spallation Source ERIC) Douglas Di Julio (European Spallation Source ERIC) Peter Willendrup (ESS DMSC and DTU Physics)

Presentation materials

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