Numerical Confirmation of Closed Separatrix in Experimental Field Reversed Configurations

Abstract

Field reversed configurations in recent experiments such as FRX–C, OCT and NUCTE are numerically studied by solving the Grad-Shafranov equation. The beta profiles used in the calculation have been inferred from the experimental data with use of one dimensional model of FRC. The calculated values of the separatrix radii well agree with the experimental data and the surfaces of flux null have been confirmed to be closed in each experiment.