Advanced computer simulations methods for neutron scattering instruments 2025

Session

Afternoon Session 1

11 Jul 2025, 13:00

R035 (DTU building 306)

Description

Virtual Experiments II, Verification, Instrument Design

25. Machine learning, digital twins and atomistic simulations for t-o-f INS

11/07/2025, 13:00

Inelastic neutron scattering is uniquely powerful to probe excitations in condensed matter, enabling extensive mapping of S(Q,E) in single-crystals. Effectively utilizing the time-of-flight neutron spectrometers and efficiently rationalizing large datasets resulting from these experiments can drastically benefit from recent developments in data science and computer simulations of both...

6. Monte Carlo Ray Tracing Efforts at the Oak Ridge Neutron Scattering facilities

11/07/2025, 13:20

This contribution provides an overview of the various Monte Carlo Ray tracing efforts at the neutron scattering facilities at Oak Ridge National Laboratory (ORNL). There are basically three different aspects to the work at ORNL, namely: Instrument optimization, integration with instrument engineering, and modeling of complex sample scattering. For instrument optimization both the Spallation...

26. Neutron optic simulation of the New NRAD Facility at the SAFARI-1 Research Reactor

11/07/2025, 13:40

The South African Neutron Radiography (SANRAD) facility, decommissioned in 2013, is undergoing a strategic upgrade as part of Necsa’s Beam Line Centre programme aligned with the new Multi-Purpose Reactor (MPR). The upgrade includes the redevelopment of the Neutron Radiography (NRAD) beamline at SAFARI-1, with emphasis on optimizing neutron optics to enhance radiographic quality and flux...

35. Overview of the optimization of the new cold spectrometer at the NCNR

11/07/2025, 14:00

ABSTRACT:
The NCNR is currently designing a new cold neutron crystal spectrometer, QMS, to replace the SPINS cold triple axis on the NG-5 beamline. The primary spectrometer before the sample consists of an elliptical guide and double focusing monochromator that hosts a velocity selector, V-cavity supermirror polarizer, resolution masks, and fast neutron filter within the incident beam. The...

36. Contingency timeslot

11/07/2025, 14:20

20. Experimental Verification of Scattering Kernels for Cold and Very Cold Neutron Production

Very cold neutrons (VCN) cover a wide spectral range within the long-wavelength tail of typ-ical sources for cold neutrons, with energies below 1 meV down to few hundreds of neV, the domain of ultra-cold neutrons (UCN). Clathrate hydrates exhibit intrinsic properties that make them suited as moderators in novel, more intense sources of VCN. Such sources hold potential to significantly enhance...