Air core poloidal magnetic field system for a toroidal plasma producing device

Patent · Tue May 02 00:00:00 EDT 1978

OSTI ID:6517314

Marcus, F B

A poloidal magnetics system for a plasma producing device of toroidal configuration is provided that reduces both the total volt-seconds requirement and the magnitude of the field change at the toroidal field coils. The system utilizes an air core transformer wound between the toroidal field (TF) coils and the major axis outside the TF coils. Electric current in the primary windings of this transformer is distributed and the magnetic flux returned by air core windings wrapped outside the toroidal field coils. A shield winding that is closely coupled to the plasma carries a current equal and opposite to the plasma current. This winding provides the shielding function and in addition serves in a fashion similar to a driven conducting shell to provide the equilibrium vertical field for the plasma. The shield winding is in series with a power supply and a decoupling coil located outside the TF coil at the primary winding locations. The present invention requires much less energy than the usual air core transformer and is capable of substantially shielding the toroidal field coils from poloidal field flux.

• Assignee: Dept. of Energy
• Patent Number(s): US 4087322
• Application Number: TRN: 79-004509
• OSTI ID: 6517314
• Resource Relation: Patent File Date: Filed date 7 Sep 1976; Other Information: PAT-APPL-720,864
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
MAGNET COILS
SPECIFICATIONS
TOKAMAK DEVICES
MAGNETIC FLUX
SHIELDING
TOROIDAL CONFIGURATION
ANNULAR SPACE
CLOSED PLASMA DEVICES
CONFIGURATION
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
THERMONUCLEAR DEVICES
700202* - Fusion Power Plant Technology- Magnet Coils & Fields