 As the idea was further developed, it was realized that a current in the plasma could create a field that was strong enough to confine the plasma as well, removing the need for the external magnets.At this point, the Soviet researchers had re-invented the pinch system being developed in the UK, although they had come to this design from a very different starting point.Once the idea of using the pinch effect for confinement had been proposed, a much simpler solution became evident.