Mr Francis Ridgeon
(email at firstname.lastname@example.org)
PhD Research Project:
I joined the Superconductivity group in 2014. My work aims to characterise and evaluate self-field corrections for critical current measurements with a focus on 'ITER' materials and sample holders. A finite element analysis model was built using Comsol Multiphysics. The superconducting properties were implemented using H-formulation. From the differences in field distribution due to geometry, and applied magnetic fields, self-field correction term were derived.
To verify the computational modelling I have extensively characterised ITER Poloidal field Nb-Ti conductor as a function of, magnetic field, temperature, current polarity. The effects of self-field were further investigated by varying the measurement geometry. I have additionally compared transport and magnetisation measurements over a range of fields and temperatures.
Centre for Materials Physics
- PhD Research Project - Conductor architecture
- 1: Ridgeon, F. J., Raine, M. J., Halliday, D. P., Lakrimi, M., Thomas, A. & Hampshire, D. P. (2017). Superconducting Properties of Titanium alloys (Ti-64 and Ti-6242) for critical current barrels. IEEE Transactions on Applied Superconductivity 27(4): 4201205.
- 2: Ridgeon, F.J., Raine, M.J., Lakrimi, M., Thomas, A., Boutboul, T. & Hampshire, D.P. (2018). Self-field Effects on JC(B,T) Measurements of Nb-Ti Strands in High Magnetic Fields. IEEE Transactions on Applied Superconductivity 28(4): 9001805.