Synthesized intensity of emission lines of hydrogen isotopes and impurities in the ITER divertor plasma

The intensity of emission lines in the ITER divertor plasma is synthesized using a model of the edge and scrape-off layer plasma. The intensity of hydrogen isotopes and impurities observed with the divertor central optical system of the Impurity Influx Monitor (Divertor) is estimated. In both inner and outer divertor plasmas, ionizing and recombining plasma components are observed for C I-III, and the recombining plasma component is dominant for C IV-V. Line-of-sight integrated spectra are synthesized in the wavelength range 200-1000 nm using photon emission coefficients. In order to evaluate the carbon-impurity influx, identifying the plasma component, i.e. an ionizing or recombining plasma component, is important.