Highly ionized Calcium and Argon X-ray spectra from a large solar flare

摘要: X-ray lines of helium-like calcium (\ion{Ca}{19}) between 3.17~\AA\ and 3.21~\AA\ associated \ion{Ca}{18} dielectronic satellites have previously been observed in solar flare spectra, their excitation mechanisms are well established. Dielectronic lower ionization stages (\ion{Ca}{17}~--~\ion{Ca}{15}) not as characterized. Several spectra during a large 2001 by the DIOGENESS spectrometer on {\em CORONAS-F}\/ spacecraft show \ion{Ca}{17} \ion{Ca}{16} ionized argon (\ion{Ar}{17}, \ion{Ar}{16}) including satellites. The compared with from synthesis code developed here based an isothermal assumption various atomic sources satellite data Cowan Hartree--Fock code. Best-fit comparisons made varying temperature code's input (Ar/Ca abundance ratio fixed at 0.33); close agreement is achieved although adjustments to some ion fractions. derived that two GOES}\/ channels, $T_{\rm GOES}$. Some identified for first time. Similar P78-1}\/ Alcator C-Mod tokamak also analyzed similar obtained. importance blends emphasized, affecting line ratios used diagnostics. This analysis will be applied Solar Maximum Mission}\/ Bent Crystal Spectrometer archive expected ChemiX instrument Sun-orbiting Interhelioprobe}\/ spacecraft, while relevance non-solar indicated.