A5012898804- Muon and positron interactions and applications
- Particle Detector Development and Performance
- Atomic and Molecular Physics
- Gamma-ray bursts and supernovae
- Particle Accelerators and Free-Electron Lasers
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Evolutionary Algorithms and Applications
- Laser-Plasma Interactions and Diagnostics
- Combustion and flame dynamics
- Advanced Multi-Objective Optimization Algorithms
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Plasma Diagnostics and Applications
- Neutrino Physics Research
- Combustion and Detonation Processes
- Pulsars and Gravitational Waves Research
- Ammonia Synthesis and Nitrogen Reduction
- Metaheuristic Optimization Algorithms Research
- Astrophysics and Cosmic Phenomena
- Rocket and propulsion systems research
- Atomic and Subatomic Physics Research
Swansea University
2003-2023
University of Wales
2003-2006
A Supervised Parallel Optimisation (SPO) is presented. The proposed framework couples different optimisation algorithms to solve single-objective problems. supervision balances the exploration and exploitation capabilities of distinct optimisers included, providing a general problems with diverse characteristics. In this work, five are included in ensemble: Particle Swarm (PSO), Genetic Algorithm (GA), Covariance Matrix Adaption - Evolution Strategy (CMA-ES), Differential (DE), Modified...
Industries across the world are making transition to net-zero carbon emissions, as government policies and strategies proposed mitigate impact of climate change on planet. As a result, use hydrogen an energy source is becoming increasingly popular field research, particularly in aviation sector, where alternative, green, renewable fuel traditional hydrocarbon fuels such kerosene essential. Hydrogen can be stored multiple ways, including compressed gaseous hydrogen, cryo-compressed cryogenic...
A compact positron accumulator based upon a simple two-stage buffer gas cooling scheme is described. Its operation to produce 10–20ns wide bursts containing around 105 positrons with cycling times in the 100msto1s range discussed. Departures of behavior from that expected such an instrument are presented. The utility these effects diagnosing performance
We propose a Plasma Accelerator Research Station (PARS) based at proposed FEL test facility CLARA (Compact Linear for and Applications) Daresbury Laboratory. The idea is to use the relativistic electron beam from CLARA, investigate some key issues in transport driven plasma wakefield acceleration, e.g. high gradient excitation by bunch, two bunch experiment energy doubling, transformer ratio, long self-modulation other advanced dynamics issues. This paper presents feasibility studies of meet...
We describe the development of an instrument for production low energy positron beams that are bunched in time, and use a velocity selection device. The bunching unit was constructed from forty seven separate elements, coupled series capacitor chain to reduce delay time propagation applied voltage pulse along electrode system facilitate operation at frequencies up 100 kHz. A parabolic potential distribution focusing used. Tests with dc beam produced radioactive source described, together...
A compact, two‐stage positron accumulator has been designed, constructed and tested at Swansea, as part of a larger experiment to study Rydberg states the positronium atom. It uses well‐understood nitrogen buffer gas technique trap accumulate positrons obtained from Na‐22 radioactive source, slowed by solid neon moderator. The main development this system embodies over previous accumulators is reduced physical dimension, made possible shorter storage times required.