Conceptual Design of a 5 T, 6 m Long and 6 m Bore Solenoid for a Future Linear Collider Detector

Abstract

The preliminary design of a next generation particle detector for the future linear collider foresees a magnetic field of 5 T at the interaction point. The magnet is a solenoid with a 6 m aperture and a length of 6.2 m and surrounded by an iron yoke. Operating current and stored energy are 18 kA and 2.3 GJ respectively. The peak magnetic field in the magnet windings is 5.8 T, a new record for this type of detector solenoids.A large bore 5 T coil implies pushing forward the design and the technologies used so far for this type of detector magnets. A preliminary design of the superconducting solenoid has been carried out to check its feasibility using the latest technologies developed for the LHC detector magnets, and to identify the research and development needs. A main issue is the engineering of a new aluminum stabilized NbTi/Cu conductor featuring reinforced aluminum and dimensions of about mm . This paper presents the main specifications of the proposed detector, the parameters and properties of the 5 T magnet, the characteristics of the superconductor, the specific R&D issues as well as an outlook to the development work in the years to come.