Calculations of current ramp-up scenarios for the Component Test Facility tokamak using the DINA code

The free-boundary equilibrium time evolution code DINA is used for calculations of the current ramp-up scenarios in the Component Test Facility (CTF) machine based on the concept of low-aspect-ratio tokamaks. The current ramp-up and subsequent support of the steady phase operation in the CTF is realized by the current driven by the neutral beam (NB), the bootstrap current and the current produced owing to the variation in the poloidal field from the control coils. The problems of seeded current formation are discussed. The self-consistent scenario for current ramp-up for the CTF project is worked out. The steady-state regime parameters are analysed. NB power absorption and current drive calculations are carried out by the DINA code tested on different devices.