Local Island Divertor (LID)
Schematic View of the LID
Local Island Divertor(LID) is proposed to improve LHD plasma performance. A head of the LID is set into an m/n=1/1 island which is made by special perturbation coils, and the plasma hits a back side of the head. For this reason, hear flux controllability and pumping efficiency are better than the case of a pump limiter.
LID head and Magnetic Field Lines
3D image of the LID head and magnetic field lines.
The LID system consists of the head, pumping system (cryopumps), and diagnostic system.