Development of the Aluminum Stabilized Superconductor for CEPC Detector Magnet

A huge superconducting magnet is proposed for the future detector of Circular Electron Positron Collider (CEPC) at the Institute of High Energy Physics, Chinese Academy of Sciences (IHEP,CAS). The design center field of CEPC detector magnet is 3 Tesla, the coil length is 7.6 m, and the free bore is 7.2 m. The coil is divided into five modules, with each module consisting of four layers of Al-stabilized Rutherford type conductor winding. An Aluminum stabilized Rutherford type conductor with the box configuration is developed for the CEPC detector magnet. This article presents R&D process and the main features of the Al-stabilized superconductor.