Effect of the lower hybrid heating on the confinement of high energy ions in stellarators

Abstract

In a stellarator-type device, the effect of the lower hybrid (LH) heating on the ion confinement is investigated. For this purpose, the motion of high energy ions is simulated numerically in the Large Helical Device, as an example of such a device. It is shown that owing to LH heating, initially well-confined particles are expelled from the plasma in time less then the ion-electron collisional time. Therefore, it is possible to use this method of heating for helium ash removal in a stellarator-reactor.