Study of non-inductive plasma current ramp-up in spherical tokamaks

摘要

Introduction. In spherical tokamaks practically there is no space for central solenoid. That is because the substantial part in the central area of tokamak is necessary to place the toroidal magnetic field coils. Hence in general case the possibility of inductive ramp up of the plasma current in spherical tokamak is very limited, the plasma current ramp up problem in such devices becomes a very important problem. One of the methods for the plasma current ramp up in spherical tokamaks could be the combined one, which includes the high frequency current drive (HFCD) and neutral beam current drive (NBCD) generations.