We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.

Email and Telephone Directory

Staff Profile

Mr Francis Ridgeon

Postgraduate Student in the Department of Physics
Telephone: +44 (0) 191 33 43654
Room number: 144B
PhD Fellow in the Durham Energy Institute

(email at

PhD Research Project:

Self-field Correction

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. 


Research Groups

Centre for Materials Physics

  • Superconductivity

Research Interests

  • 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.

Is supervised by