Ecole Polytechnique Fédérale de Lausanne

Ecole Polytechnique Fédérale de Lausanne

Ecole Polytechnique Fédérale de Lausanne is centered on its three missions: teaching, research and technology transfer. EPFL has 338 faculty and more than 10000 students.

EPFL has been working for a long time in thermal stabilization of coated conductors. It has a strong expertise in experimental characterization of electrical and thermal behaviours or various coatings, and possesses unique home-made experimental setups for it. Recent EPFL activities have been realized in close collaboration with EPM, and it is currently the European academic partner that is in the best position to capture the knowhow brought by EPM in Europe. EPFL has a dedicated lab for fiber-optic sensors: Group For Fiber Optics.

Read more about Ecole Polytechnique Fédérale de Lausanne

  • D. Colangelo and B. Dutoit. Impact of the “Normal Zone Propagation Velocity of High-Temperature Superconducting Coated Conductors on Resistive Fault Current Limiters”, in IEEE Transactions on Applied Superconductivity Asc, vol. 25, num. 2, (2015).
  • T. Rubeli, D. Colangelo, B. Dutoit and M. “Vojenčiak. Heat transfer monitoring between quenched high-temperature superconducting coated conductors and liquid nitrogen”, in Progress in Superconductivity and Cryogenics, vol. 17, num. 1, p. 10-13, (2015).
  • X. Lu, M. A. Soto, L. Thévenaz. “MilliKelvin resolution in cryogenic temperature distributed fibre sensing based on coherent Rayleigh scattering”, in Proc. of SPIE Vol. 9157 91573R-4, (2014).
  • A. Hobl, W. Goldacker, B. Dutoit, L. Martini and A. Petermann et al. “Design and Production of the ECCOFLOW Resistive Fault Current Limiter”, in IEEE Transactions On Applied Superconductivity, vol. 23, num. 3, (2013).
  • F. Roy, B. Dutoit, F. Grilli and F. Sirois. “Magneto-thermal finite element modeling of 2nd generation HTS for FCL design purposes”. 8th European Conference on Applied Superconductivity, Brussels, BELGIUM, Journal of Physics Conference Series, (2008).
  • FP7: ECCOFLOW: Development and field testing of an efficient YBCO Coated Conductor based Fault Current Limiter for Operation in Electricity Networks
  • IEA HTS Implementing Agreement Executive Committee Member
  • FP7: GOSPEL "Governing the speed of light" 
  • COST Action 299 "FIDES: Optical Fibres for New Challenges Facing the Information Society"
  • Unique ultrafast pulsed measurement setup µs range, 1.6 kA, able to characterize flux-flow resistivity without thermal perturbations
  • Fast pulsed measurement setup ms range, 3.2 kA, used for NZPV characterization
  • Real time heat exchange measurement setup for an optimal stabilization by thermal insulation.
  • Fully equipped fiber-optic research lab

Dr. Bertrand Dutoit is at the head of applied Superconductivity Group at EPFL. He has worked in many aspects of applied superconductivity, he did a PhD work on dynamic magneto-optical observation of intermediate state in type I superconductors. He did high precision transport AC losses measurements in High Temperature Superconductors (HTS) at EPFL. His main activities are now on superconducting device numerical modelling with Finite Elements (FEM), AC losses calculations, HTS cables, Fault Current Limiters (FCL), dynamical Hall probes magnetic field mapping, quench measurements and heat transfer measurements. He is member of the IEA HTS Implementing Agreement Executive Committee.

 

Prof. Luc Thevenaz leads a research group involved in photonics, namely fibre optics and optical sensing.

Research topics include Brillouin-scattering fibre sensors, nonlinear fibre optics, slow & fast light and laser spectroscopy in gases.

His main achievements are:

  • the invention of a novel configuration for distributed Brillouin fibre sensing based on a single laser source, resulting in a high intrinsic stability making for the first time field measurements possible,
  • the first experimental demonstration of optically-controlled slow & fast light in optical fibres, realized at ambient temperature and operating at any wavelength since based on stimulated Brillouin scattering. The first negative group velocity of light was also realized in optical fibres using this approach.
  • He is author or co-author of some 400 publications and 9 patents. He is Member of the Editorial Board (Associate Editor) for the journals "Nature Scientific Reports", "IEEE Photonics Technology Letters", "Laser & Photonics Reviews" and "Nanophotonics". He is also Senior Member of the IEEE and Fellow of the Optical Society of America