Compact particle cancer treatment system by utilizing high-temperature superconducting magnets.

利用高温超导(HTS)丝设计和制造了一种3T偶极磁体。由于磁铁的磁轭和磁极是叠层的，所以可以用交流电激励磁体。在设计中，应用有限元方法分析了磁场、导热和电磁力。在冷却试验和线圈的临界电流测量中，实现了预期的性能。线圈具有负曲率的零件。我们获得了将高温超导磁体应用于紧凑型门架的重要知识。

A 3-T dipole magnet was designed and constructed by utilizing high temperature superconducting (HTS) wires. Since its yoke and pole are laminated, the magnet can be excited by alternating currents. In the design, The Finite Element Method was applied to analyze magnetic fields, heat conductions and electromagnetic forces. The expected performance was realized in cooling tests and critical current measurements of fabricated coils. Coils have parts with negative curvature. We got an important knowledge to apply HTS magnets to compact gantries.