Influence of M-shell high-energy photons on diagnosing temperature of radiative field

The emission spectra of Cl plasma are calculated by solving the rate equations under conditions with and without M-shell high-energy photons at different temperatures and densities. The influences of the M-shell high-energy photons on the emission spectra are studied. It is found that the M-shell high-energy photons hardly affect the important ionic stage of the plasma, but they can excite or ionize the inner-shell electrons (e.g. 1s electron) of the ions in the plasma, hence affect the emission spectra. Therefore, if there are M-shell high-energy photons, the influence of temperature, density and M-shell high-energy photons on the emission spectra should be considered simultaneously.