Solar flare spectroscopic diagnostics for wavelengths less than 2000 angstroms
Abstract
We discuss the use of intensity ratios of emission lines for determining the electron density and temperature in flare plasmas. The availability diagnostics cover the temperature range from about 40,000 K to about 10,000,000 K. We summarize the current work on flare density diagnostics and review the applications of this theory to available flare spectra. We discuss the importance of line profiles for determining nonthermal mass motions in the plasma and for estimating path lengths along the line of sight. We review the current information on line profiles in flare spectra. We comment on determining departures from ionization equilibrium using line ratios in the X-ray and EUV regions.
- Publication:
-
Naval Research Lab. Report
- Pub Date:
- June 1979
- Bibcode:
- 1979nrl..reptQ....D
- Keywords:
-
- Emission Spectra;
- Solar Flares;
- Solar Spectra;
- Solar Spectrometers;
- Spectrum Analysis;
- Electron Density (Concentration);
- Electron Energy;
- Ionization;
- Line Spectra;
- Solar Physics