Simulation of Quench in DC Magnet of Super-X Test Facility Using a Quasi-Three-Dimensional Model

The quench phenomenon is an abnormal process caused by disturbances during the operation of superconducting magnets, which can lead to irreparable damage to the magnet. The DC magnet of the Super-X test facility is wound by cable-in-conduit conductors (CICCs) with a maximum field of 15.7 T and is forced flow cooled with 4.3 K supercritical helium. The heat transfer between layers and pancakes affects the diffusion rate of the normal region in the quench process, therefore a quasi-3D model is proposed to analyze the quench behavior of superconducting coils. A 1D assumption is made for the CICC axially, while taking into account the thermal coupling effect through the inter-turn insulation. The quench process of DC magnets of the Super-X test facility is analyzed and calculated for different operating parameters.