Patent ID: 8324814

Claim:
A device for producing and/or confining a plasma, comprising a chamber in a volume of which the plasma is produced or confined, which chamber includes a wall defining an envelope inside the chamber and surrounding the volume, at least one annular magnet with an axis of symmetry, having a centripetal or centrifugal radial magnetization direction, said magnet further having a median plane of symmetry parallel to said radial magnetization direction: such that the field lines of said permanent magnet do not pass through said median plane, and being at least partially embedded in the wall defining the envelope such that the axis of symmetry of said magnet coincides with a normal to the envelope considered at the location of the magnet, so that the magnetization direction is substantially perpendicular to said normal to the envelope; wherein a plurality of annular magnets are arranged at the level of the wall in order to form a two- or three-dimensional array.