✦ LIBER ✦

Diagnostics of solar flare and evaporated plasma using mm-wave emission

✍ Scribed by A. V. Stepanov; S. Urpo; V. V. Zaitsev

Publisher: Springer
Year: 1992
Tongue: English
Weight: 530 KB
Volume: 140
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00148434

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✦ Synopsis

Pulsations of mm-wave emission with a period of about 5 s, which occurred during the impulsive phase of the flare of June 22, 1989, are investigated. It has been shown that these pulsations can be driven by Alfv6nic oscillations of a flare loop excited due to upward motion of the chromospheric evaporated plasma. A method is proposed to determine the density and temperature of the evaporated plasma as well as the flare loop magnetic field and loop length in terms of Alfvfnic oscillations of the loop and hremsstrahlung mechanism of ram-wave emission. The estimation of evaporated plasma energy has shown that for the flare of June 22, 1989 the energy content in electron beams is insufficient for chromospheric plasma evaporation. It is not excluded that the main energy release process occurs in the chromosphere.

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