Energy balance studies during ECRH experiments in FT-1 tokamak

The energy confinement degradation was found in FT-1 Tokamak in ECRH experiments. The time evolution of Te profile during ECRH pulse was measured by the laser scattering, and the local energy balance was analysed by the numerical code. The peripherical absorption of a microwave power and the fast development of some additional energy loss mechanism due to the action of microwaves on the plasma are supposed to be the reasons of confinement degradation. (author)