Speaker
Description
To study the properties of the Higgs, scientists from the Institute of High Energy Physics have proposed to build the Circle Electron Positron Collider (CEPC) and published a conceptual design report in 2018. In order to improve the luminosity of the CEPC, the final focus system in the interaction region is continuously upgraded. According to the latest physical requirements of superconducting magnets in the CEPC interaction region, a high gradient, double aperture quadrupole magnet Q1a is required, which is 1.9 m from the collision point. The gradient of the superconducting magnet Q1a is 141 T/m and the magnetic length is 1.21 m. In this paper, we discuss the advantages and disadvantages of the three kinds of quadrupole coil structures, including cos2θ coil, CCT coil, and racetrack coil. High-temperature superconducting materials and low-temperature superconducting materials are used in our magnet design. In addition to completing the design of the superconducting quadrupole magnet Q1a, design optimization is needed to greatly reduce the weight of the magnet.
