Speaker
Description
The Swiss Plasma Center is proposing an upgrade to the EDIPO test facility (EDIPO 2), which will generate a 15 T background field within a 144×144 mm² aperture. This upgrade will enable variable-temperature, high-current testing of superconductor samples, enhancing the facility’s capabilities for advanced material research and development. This work presents an overview of the progress on the quench protection system for EDIPO2.
To model the quench behavior, a simulation of heat propagation within various locations of the coil winding of the magnet is made. The magnet is protected against overheating during a quench by an external energy dump through a 0.1 Ω resistor. Thermal properties, including heat capacity and conductivity, are determined using the rule of mixtures for Nb3Sn, copper, epoxy impregnation, and fiberglass insulation. Electrical resistivity is modeled based on current sharing between Nb3Sn and copper, considering the longitudinal electric field. Cooling terms are applied at the boundary nodes to account for wet contact with the liquid helium bath, assuming a 0.2 mm thermal interface of glass-epoxy.
Acknowledgment:
This work has been carried out within the framework of the EUROfusion Consortium, via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion) and funded by the Swiss State Secretariat for Education, Research and Innovation (SERI). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union, the European Commission, or SERI. Neither the European Union nor the European Commission nor SERI can be held responsible for them.
