Abstract
In this paper, taking the soft X-ray Fe XVII 1.501-nm spectral line in the solar corona as an example, we analyze the effect of opacity on the 1.501-nm spectral line, and we discuss the diagnostic principle for the plasma temperature and the electron density. Results show that the plasma temperature in the solar coronal has an order of magnitude of 106 K and that the electron density has an order of magnitude of 1010 cm −3, which are in good agreement with the reported values. Through analysis, we show that the opacity has a great effect on the 1.501-nm spectral line and that the electron density is connected with the temperature. The results of this study are significant and valuable in solar coronal plasma diagnostics.
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