Comparison of propagation and absorption of FEL-generated microwaves with theory. DOE Milestone report microwave tokamak experiment, March 1990.

摘要

The ECH propagation and absorption experiments performed in MTX during November, 1989 have been analyzed in detail. These experiments used a microwave horn mounted behind the microwave calorimeter on the tokamak inside wall to measure the ECH power transmitted through the plasma from the injection port. The transmitted power fraction was obtained by normalizing this measurement with the incident power measured by a horn in the last mirror (M4) of the microwave transmission line. Analysis of shots without plasma showed that the powers measured by the two horns were linearly dependent. The remainder of this report is organized as follows. The next section presents the analysis of the data form the FEL experiments. A broad comparison of the data with ray tracing results using fixed density and temperature profiles is described. Following this, detailed analysis of individual shots are given in which density profiles inferred from FIR interferometer measurements and electron temperature profiles from ECE measurements are used in the ray tracing and absorption calculations. The next section discusses possible causes for the scatter in the experimental data and the differences between the measurements and calculational predictions. 7 refs., 8 figs., 1 tab. (ERA citation 15:036567)