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6 - The creation of plasma current

The basic means of producing this current consists in generating it by induction. We place a coil made up of horizontal layers in the centre of the configuration (the coil is placed in the " hole" of the torus). Using this coil, and provided that the current is varied, plasma current is created by induction exactly like in an electric transformer (picture 7). This type of operation may take place without an iron core (picture 8).


7 - Stabilising plasma

The equilibrium of the plasma, its position, its shape and the control of the current are taken care of by the group of horizontal magnets called poloidal coils (picture opposite).



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