| 摘要 |
PURPOSE:To sufficiently utilize cooling medium of a current lead by folding a current lead a plurality of times in the axial direction in a vacuum heat insulating space in a torque tube. CONSTITUTION:A first stage current lead 1a made of a normal conducting conductor is connected at its end to a superconducting field winding 5, and temporarily connected at its joint shaft 7 side to a first connection pipe 8a having a U-shaped hole. A folding-second stage current lead 1b is connected to the pipe 8a. A second connection pipe 8b having a U-shaped hole is connected to the other end of the lead 1b, folded to a second stage pipe 8b, and connected with a third stage current lead 1c. The leads 1a-1c are folded in a torque tube 6 and a vacuum heat insulating space 9 in the torque tube 6 surrounded by the end faces of a low temperature rotor 3 and the shaft 7. The folded opposite end of the lead 1c is connected through the shaft 7 to a collector ring 10 by a connection conductor 10. |
