Helical field stabilization of plasma devices

Details Helical field stabilization of plasma devices Helical field stabilization of plasma devices

G - Physics

21

B

359/7

G21B 1/00 (2006.01) H05H 1/12 (2006.01)

Patent

CA 1164109

HELICAL FIELD STABILIZATION OF PLASMA DEVICES ABSTRACT OF THE DISCLOSURE A toroidal plasma device has a toroidal confine- ment vessel defining a toroidal space and confining ionized gas therein. A solenoid which links the toroidal space induces a toroidal electric field therein to produce plasma current. A plurality of first windings are wound sub- stantially helically around the vessel substantially equally spaced around its minor circumference. A plurality of second windings are wound substantially helically around the vessel substantially midway between successive first windings. Direct current is passed through the respective first and second windings in opposite directions with the current in the respective first and second windings equal or slightly unbalanced. The currents in the first and second windings produce a helical magnetic field. The combi- nation of the poloidal magnetic field from the plasma current with this helical magnetic field produces a separatrix in the toroidal space, this separatrix defining a closed sur- face which limits and encloses a region within which closed and nested magnetic flux surfaces exist.

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