Accuracy of reconstruction of the transport coefficients and ECRH power profile in tokamaks from solutions to inverse problems

Experiments on ECR plasma heating provide a powerful method for studying electron transport in tokamak plasmas and reconstructing the transport coefficients. An analysis of such experiments requires, however, reliable knowledge of the profile of the ECRH power and the region where it is deposited. In the present paper, the transport coefficients and ECRH power profile are reconstructed from the solutions to inverse problems by analyzing the transient process after ECR heating is switched on or off. In order to calculate the plasma parameters with this approach, it is necessary to know how the accuracy of the solutions to inverse problems depends on the errors in the input parameters. The accuracy of reconstruction of the ECRH power profile and transport coefficients in model problems is investigated as a function of errors in measuring the electron temperature. The results of this investigation are used to analyze experiments with ECR plasma heating in the T-10 tokamak and to estimate the accuracy of the results obtained.