HIGH-TC MONOLITHIC HELICAL MAGNETS

Helical magnets have been manufactured of both high Tc and low Tc mate rials. The helical magnets are manufactured from solid hollow cylinder s. A helix is machined in the cylinders, resulting in one-layer soleno ids. Pn this paper, results of a BSCCO 2212 helical magnet are discuss ed. The magnet has been tested in fields up to 15 T. Stability, quench protection, and critical parameters have been determined. Results of local heating of the magnet, and the resulting quench propagation, hav e been studied. A distributed method of quench protection has been tes ted. The results may be used for quench protection of large high-Tc ma gnets. The details of the testing are described.