Coils of the LHD

3 pairs of poloidal coils (RED) and a pair of helical coils (YELLOW). They are superconducting magnets.

Poloidal coils

(Inner Vertical coil, Inner Shaping coil, and Outer Vertical coil)
IV coil IS coil OV coil
Diameter(inside) 3.2m 5.4m 10.4m
Diameter(outside) 4.2m 6.2m 11.6m
Weight 16ton 25ton 45ton
B max 6.5T 5.4T 5.0T
Current 20.8kA 21.6kA 31.3kA
Turn number 240 208 144

Helical coil

HELICAL coil
Major radius 3.9m
Minor radius 0.975m
Weight 65ton
B max 6.9T
Current(1st phase) 13kA
Current(2nd phase) 17kA
Turn number 450
LHD > LHD information > LHD Technical Information > Coils of the LHD
LHD > LHD information > LHD Technical Information > Coils of the LHD