Collisional-radiative modeling for the EUV spectrum from W43+-W45+ ions in EAST Tokamak plasma

Abstract The wavelength and transition rates of W43+-W45+ ions in the 40-140 A region have been calculated by the relativistic configuration interaction method with the implementation of the Flexible Atomic Code to analyze the experimental spectrum from the EAST Tokamak. The result makes a reasonable agreement with the available EBIT experimental and other theoretical data. The population process of the W43+ ions were analyzed in detail. The synthetic spectrum from the collisional-radiative model of W43+-W45+ ions agreed with the Tokamak plasma spectrum. Some strong emission lines of the W43+-W45+ ions are identified and assigned in the present work. Finally, according to the dependence of the intensity ratio on the electron temperature, some transition pairs are proposed as the diagnosis lines.