[en] The key concept of the proposed JET pumped divertor is that since sputtering of impurities cannot be suppressed at the target plate of a divertor, those impurities should be confined in the vicinity of the target plate itself. This confinement can be achieved by maintaining a strong directed flow of plasma particles along the divertor channel towards the target plates so as to prevent the back diffusion of impurities by the action of a frictional force. A most important feature of the configuration is the connection length, along the magnetic field lines, between the X-point region and the target plates. This distance should be long (of the order of 10 metres) in order to achieve an effective screening effect of the impurities. In other words, the X-point should be well separated from the target plates and this can only be achieved by a coil which is internal to the vessel. The proposed configuration consists of a single additional poloidal field coil, inside the vessel, at the bottom. (author)