Slides and videos of the talks given at the workshop are now available online. The workshop focused on requirements/developments for a (bidirectional) Monte Carlo variance reduction method applied to neutron beamline transport systems.
Contact: Peter Willendrup, DTU/ESS
The SINE2020 e-tools work-package team met in Coimbra, Portugal, on September 6th 2016 for the workshop Neutrons: Cradle to Grave, which was also live-streamed. Slides and videos of the talks are now available online.
The focus was on requirements/developments for a (bidirectional) Monte Carlo variance reduction method applied to neutron beamline transport systems. The workshop aimed at discussing how optimisation techniques, variance reduction schemes e.g. as implemented in CombLayer and RESTRAX can benefit other codes, e.g. McStas. Further, the collaboration aimed to share code and know-how wherever possible, e.g. component models between RESTRAX and McStas.
This task of the e-tools WP develops and assesses new e-science tools for very accurate simulation of neutron beam-lines. The activity brings together experts from both (a) neutronics, e.g. MCNP used for simulating production and transport of neutrons from the target through moderators and reflectors and (b) Monte Carlo ray-tracing, e.g. McStas and RESTRAX, which simulate the transport of neutrons along guides and their interaction with other optical elements and samples. The combination of these two types of code will give a unique tool for optimising instruments and experiments from the source to the sample, including shielding and thus background optimisation. This will increase the realism of neutron simulation to a completely new level, since also unwanted spurious scattering signals are modelled, thereby addressing the signal-to- background ratio of instruments for the first time. Based on existing prototypes, the collaboration aims to deliver an easier-to-use and benchmarked solution, as well as establish networking and knowledge sharing between the partners and facilities.
Slides and video recordings of workshop talks are available below.
McStas-MCNP interface solutions, Erik B Knudsen, DTU – Video #1 (partial)
MCPL Monte Carlo Particle List interchange format, Thomas Kittelmann, ESS – Video #1
NCrystal, coherent scattering library for Geant4, Xiao Xiao Cai, DTU/ESS – Video #1
Code, simulations and experiments including guides at BOA, PSI, Emmanouela Rantsiou, PSI – Video #2
Neutron acceptance diagram methods, Phil Bentley, ESS – Video #2
Initial experiences using Advantg in fusion and spallation, Steven Lilley, STFC – Video #2
MCNP model builder / CombLayer, fast beamline constructor, variance reduction. Instrument background calculations for long beamlines at the ESS., Stuart Ansell, ESS – Video #3
RESTRAX/SIMRES reverse tracing, optimisation, McStas reverse tracing prototype, Jan Saroun, NPI – Video #3