Speaker
Description
20 Tesla is the nominal field limit for practical low temperature superconducting (LTS) magnet operating at 4.2 Kelvin. To achieve field above 20 Tesla, methods such as LTS magnet operating at sub-atmospheric pressure or LTS/HTS hybrid magnets, are normally adopted. Magnets working at sub-atmospheric pressure have high cryogen operating cost and high ice-blockage risk due to air leakage into system. In this paper, concept design of a 19 Tesla 100 mm cold bore LTS magnet, as an outsert for a 24 Tesla compact research magnet, aimed at 1 Tesla/min ramp rate for condensed matter physics research application is presented. The magnet has two Nb3Sn coils and two NbTi coils. It operates at about 240 A current, generates 19 Tesla vertical central field, and has a 0.1% homogeneity in 10 mm DSV in its 100 mm cold bore. In this paper, the challenges which have to be met to provide such magnets will be discussed.
