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The ash is removed by the divertor. Since everything in the ring is ionised you can selectively remove ions with a magnetic field using their charge to mas ratio. This is done by the divertor, which pulls out heavier ions while leaving the tritium and deuterium in the ring. As for fuelling, that's basically easy as you don't need to inject much fuel since ...


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Eddy currents. Conductors resist changes in magnetic field. This is the basis of the magnet-in-copper-pipe demo. When the conductive metal encroaches on the plasma ball it encounters the ball's (spheromak's) magnetic field. The eddy current effect pushes back on the metal and pushes inward on the plasma, compressing and adiabatically heating it. The plasma'...



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