AN ADVANCED METHOD FOR HELICAL-COIL WINDINGS IN FUSION DEVICES

In helical experiment devices, the accuracy of their nonplanar coils a ffects plasma confinement properties significantly, so coil winding ac curacy is one of the crucial issues for their construction. An advance d method for helical coil windings in fusion devices was studied. This new method utilizes a geometrical characteristic of the trajectory of the helical coil, which enables us to improve the accuracy of coils, and is thus expected to improve the mechanical, electromagnetic and su perconducting properties of the coils. This paper presents the new con cept of the winding method and practically shows the results of the R & D for the Large Helical Device (LHD).