Speaker
Description
Novel conceptual designs for next-generation high-energy particle detectors are currently under development by the international research community. As part of the Future Circular Collider (FCC) conceptual design study in the electron-positron collision configuration, the baseline detector proposals (CLD and IDEA project) have selected aluminum-stabilized NbTi Rutherford cables as the primary technology for their solenoidal detector magnets. For the IDEA detector design, a thin solenoid able to provide a 2 T nominal magnetic field has been considered to maximize the overall transparency and energy resolution of the detector calorimeters positioned outside of the solenoid volume. Despite the high reliability and well-known performances of the low-temperature superconductors (LTS) for particle detector magnets, this technology is at present not commercially available resulting in high costs of the magnet construction and development program. In this context, a new superconducting solenoid design able to provide a 3 T central magnetic field entirely based on aluminum stabilized High-Temperature Superconductor (HTS) cables is being developed at the Istituto Nazionale di Fisica Nucleare (INFN) Laboratorio di Acceleratori e Superconduttività Applicata (LASA). This innovative design features an increased bore radius to accommodate enhanced dual-readout crystal calorimeters with the possibility to work at an operating temperature of 20 K. The proposed configuration significantly reduces the cryogenic power consumption improving the overall accelerator sustainability while increasing the operating margin of the superconducting winding. In this paper, the electromagnetic performances and a preliminary thermo-mechanical analysis of the proposed HTS design are discussed and compared to LTS configurations. Details of the protection feasibility are provided together with transparency calculations of the coil volume showing the advantages of the proposed HTS configuration as an important step towards increased performances and enhanced energy efficiency of future particle detector magnets for lepton collider experiments.
