The behaviour of cryogen-free MgB2 react and wind coils

Although the critical temperature of MgB2 is far below those of HTS materials, its simple composition, its upper critical field, the lack of weak links and the low anisotropy make it an interesting material for magnet applications. The low cost of magnesium diboride and the rather simple conductor manufacturing process triggered the interest of the industry and at present conductors are available in km order lengths. MgB2 is a good candidate for MRI applications and also for particle accelerator magnet applications. Several magnesium diboride coils were constructed and successfully tested in cryogen-free systems. Current values up to 320 A were reached at 14 K for react and wind pancake coils, whose behaviour is described in the paper.