High Temperature Superconducting Quadrupole Magnets With Circular Coils

Particle accelerators use a variety of low field magnets. This paper describes a recently proposed, novel concept of using circular superconducting coils for multipole iron-dominated magnets. This type of magnet design is most suitable for the use in high temperature superconductors (HTS), as well as in react and wind magnet technology. The HTS quadrupole magnet with 45-mm aperture and 100-mm diameter coils was designed, fabricated, and tested. The magnet design includes the choice of superconductor, three-dimensional (3-D) magnetic field optimization, and mechanical design. The magnet models were tested at the liquid nitrogen temperature. This paper presents and discusses the test results.