Physics – Plasma Physics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ppcn.conf..199k&link_type=abstract
In ESA, Fourth International Toki Conference on Plasma Physics and Controlled Nuclear Fusion p 199-202 (SEE N94-22624 05-75)
Physics
Plasma Physics
1
Ionization, Plasma Density, Solar Flares, X Ray Spectra, Magnetic Disturbances, Plasma Frequencies, Plasma Temperature, Solar Observatories, X Ray Telescopes
Scientific paper
Time dependent Bragg crystal spectrometer x-ray spectra of Fe XXV and S XV during the flare of 21 Jan. 1992 from Yohkoh satellite are presented. The electron temperatures are derived from the intensity ratio of the dielectronic satellite lines to the resonance line from the spectra accumulated from one minute. The ion abundance ratios, n(Li)/n(He), n(Be)/n(He) and n(B)/n(He) of iron ions and n(H)/n(He) and n(Li)/n(He) of sulphur ions are obtained from the intensity ratios of the inner shell excited satellite lines to the resonance line. The electron temperatures derived from S XV begin to increase after the rise of that from Fe XXV. The values from S XV are always lower than those from Fe XXV. The derived ion ratios show a deviation from an ionization equilibrium toward an ionizing phase except for the ratio n(H)/n(He) of sulphur ions. The accuracy of atomic data was examined.
Itikawa Yukikazu
Kato Takako
Masai Kuniaki
Sakimoto Kiyoshi
Watanabe Ta.
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