Speaker
Description
High temperature superconductors incarnates the future of magnet technologies. Their ability to transport higher current within higher magnetic field compared to LTS make them the perfect contender toward compact high field magnets for TOKAMAKS. This possibility would increase drastically their performances and therefore possibly clearing a path to clean and sustainable energy. Modern TOKAMAKS project such as EUROFUSION DEMO explore design using HTS or Hybrid magnets. CEA proposed a hybrid CS magnet design featuring a high field HTS conductor and a low field LTS conductor. This article will focus on the HTS conductor by introducing its subscale conductor. It is composed by a single CORC conductor featuring 120 tapes of 4 mm width. Its intended performances are a current of 20 t o25 kA at 18 T and 20 K. A sample is actually being design to qualify this sub-scale conductor in the SULTAN facility in Switzerland, which is used to qualify conductors design with a background field of 11 Tesla at nominal current. Cooling will be done by supercritical helium circulation within the sample. Sample’s particularity is to use pre-tined tapes, objective is to assess the performance impact of such design before and after heat treatment. The sample will be composed by a heat treated leg a non-heat treated one. By doing so, CEA intends to demonstrate a possible mechanical stability increase under magnetic load.
Thermal hydraulics performances and AC losses will also be evaluated and presented in this paper.
This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them.
