Radiation Transport Modelling

Radiation transport modelling concerns understanding the flux and spatial density of subatomic particles in space and time and at energies that typically do not require quantum or relativistic considerations. Such modelling lies at the heart of how we design, regulate and operate some of the most important technologies for the twenty-first century. These include building and operating new reactors (fission and fusion), de- commissioning old ones, medical radiation therapy, as well as establishing novel space technologies through e.g. the development of space-bound mini-reactors for off-world bases and protection for high-tech equipment exposed to high-energy radiation such as satellites and spacesuits.

Accurate prediction of how radiation interacts with surrounding matter is based on modelling through the Boltzmann transport equation. Many of the existing methods used in this field date back decades and rely on principles of simulated particle counting obtained by Monte Carlo and other numerical methods. Together with powerful modern HPC, smarter algorithms based on modern mathematical approaches have the capacity to handle significantly more complex scenarios e.g. time dependence, rare-event sampling and variance reduction as well as multi-physics modelling.

IMI Fellows are involved in a number of projects working with academics at Cambridge, industrial researchers e.g. at Jacobs and medical physicists at the Royal Berkshire NHS Foundation Trust.