An evaluation of the possibility of studying flare plasma turbulence using the satellites of He I line forbidden components

Details An evaluation of the possibility of studying flare plasma turbulence using the satellites of He I line forbidden components An evaluation of the possibility of studying flare plasma turbulence using the satellites of He I line forbidden components

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984soph...90..269f&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 90, Feb. 1984, p. 269-279.

Physics

3

Forbidden Bands, Helium Plasma, Plasma Diagnostics, Plasma Spectra, Plasma Turbulence, Solar Flares, Line Spectra, Plasma Frequencies, Plasma Oscillations

Scientific paper

The possibility of diagnosing the flare plasma of forbidden He I lines by means of the Baranger-Mozer method is investigated, noting that such a diagnosis would make it possible to determine the plasma oscillation frequency and noise level. From an examination of the He I lines observed in a solar flare, it is found that the appearance of satellites of forbidden components in the flare spectrum caused by turbulent electric fields is the most probable for He I 3819.606 A lines. It is also found that the Baranger-Mozer method is more sensitive to the high-frequency component of turbulent fields than to the low-frequency ones. An evaluation is made of the upper limit of the turbulent oscillation level in flares. Satellites of the forbidden component of the 3820 A line are detected in the spectrum of the solar flare of September 26, 1963. Its relative intensity is then used to derive the level of low-frequency oscillations (approximately 1.5 kV/cm).

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