Numerical simulation of electron heating in a tokamak

The electron temperature profiles resulting from localization of the auxiliary-heating power in various places have been simulated numerically. The effect of the auxiliary electron heating on the global plasma properties (the electron energy, the loop voltage, and the energy lifetime) has been studied. The results of the numerical simulation are compared with experimental data on electron cyclotron heating in the FT-1 tokamak. The method selected for solving the heat-conduction equation yields a universal electron temperature profile for the model used here. The results may thus prove useful for analyzing experiments on electron heating in other devices.