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Thesis
Home   /   Thesis   /   Cooling and quench in HTS winding packs for tokamaks

Cooling and quench in HTS winding packs for tokamaks

Engineering sciences Thermal energy, combustion, flows

Abstract

The magnets used in current tokamak-type fusion machines are made of superconducting cables, and they will necessarily also be superconducting in future tokamaks aiming at generating electricity, copper coils being no longer useable due to the huge level of required electrical power. The use of high temperature superconductor (HTS) materials is envisaged instead of present low temperature superconductor (LTS) materials, because they give access to higher magnetic fields and open the way to more compact and potentially more performing machines. The aim of the thesis will be to propose designs for HTS windings, taking into account their specific features, notably the large operation domain in temperature and the phenomenology of incidental transition to the resistive state, known as quench, very different from LTS superconductors. Addressing electrical, thermal and thermohydraulic issues, the doctoral project will aim to study different HTS designs (stacked or twisted tapes), develop the associated simulation tools, design and carry out experiments to characterize the thermophysical properties on a suitable HTS sample, and use the obtained results to propose one or more HTS winding designs.

Laboratory

Institut de recherche sur la fusion par confinement magnétique
Service Tokamak Exploitation et Pilotage
CRYomagnétisme
Aix-Marseille Université
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