Plasma Loss from Mirror-Torus-System-1

It is found that there is a plasma loss from the toroidal divertor equipped in Mirror-Torus-System-1, which is composed of two simple mirrors, four toroidal divertors and two U -bends without the rotational transform. The loss in the divertor is investigated from the point of the plasma density profiles in the down stream side of the divertor in comparison with that of the up stream plasma. The loss is estimated to be 20% of plasma flowiuag into the divertor. This value is explained from what the Pfilsch-Schlüter current flowing in the azimuthal direction in the divertor enhances the radial flow of plasmas.