This project will explore the feasibility of using single-photon avalanche diode (SPAD) array sensors in conjunction with scintillating fibres as a distributed neutron sensing system within a nuclear fusion reactor. The work lies at the intersection of emerging quantum technologies and the UK Atomic Energy Authority’s (UKAEA) research into nuclear fusion (https://www.gov.uk/government/organisations/uk-atomic-energy-authority).  There is a strategic need to develop high-performance and accurate sensor systems, particularly for neutron radiation diagnostics, to support long-term operations. 

The goal is to develop a system capable of spatially resolving neutron distributions in challenging reactor geometries, such as those found in the LIBRTI blanket experiments (https://www.ukaea.org/work/librti/). This capability would provide valuable insight into neutron behaviour in fusion reactions.  LIBRTI’s goal is to demonstrate controlled tritium breeding, marking a crucial step toward a predictable and controllable method for generating the fuel required for a self-sustaining fusion fuel cycle. This PhD project explores the potential of embedding scintillating fibres within blanket structures, enabling radiation measurements in locations inaccessible to conventional neutron diagnostics. The PhD will focus on developing and enhancing diagnostic and sensor technologies for the LIBRTI facility, specifically using single-photon detector technology. 

The project will be based at Heriot-Watt University, in the Quantum Optics and Computational Imaging (https://quantum-optics.site.hw.ac.uk/) and Photonic Instrumentation (https://phi.eps.hw.ac.uk/) groups. It will be jointly supervised by researchers at UKAEA’s facility in Oxfordshire.  This is primarily an experimental research project, incorporating computational components for data analysis and data inversion. Applications are welcomed from candidates with any STEM background who have an interest in experimental physics, sensing technologies, and fusion diagnostics.  The successful candidate will be expected to spend time onsite at the LIBRTI facility, conducting field testing and validation of developed equipment.