Alfven waves amplification due to quasiresonant parametric interaction with magnetoacoustic waves in heat-releasing isentropically unstable plasma
A quasiresonant parametric decay of a magnetoacoustic wave into two Alfvén waves in a heat-releasing plasma is considered. It is shown that under conditions of isentropic instability under resonance conditions (zero frequency detuning), biexponential amplification of Alfvén waves occurs. The presence of frequency detuning leads first to the preceding stage of this parametric modulation of the amplitude of Alfvén waves, the duration of which increases with increasing detuning. The limiting frequency detuning is found at which amplification of Alfvén waves does not occur at all.
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Keywords
isentropic instability, parametric amplification, MHD-waves, magnetohydrodynamics, изоэнтропическая неустойчивость, параметрическое усиление, МГД-волны, магнитогидродинамикаAuthors
| Name | Organization | |
| Belov S.A. | Samara State Aerospace University; Samara Branch Lebedev Physical Institute | mr_beloff@mail.ru |
| Molevich N.E. | Samara State Aerospace University; Samara Branch Lebedev Physical Institute | molevich@fian.smr.ru |
| Zavershinskii D.I. | Samara State Aerospace University; Samara Branch Lebedev Physical Institute |
References
Parker E.N. // Astrophys. J. - 1953. - V. 117. - P. 431-436.
Зайцев В.Ф., Полянин А.Д. Справочник по обыкновенным дифференциальным уравнениям. - М.: Физматлит, 2001. - 576 с.
Belov S.A., Molevich N.E., and Zavershinskii D.I. // Tech. Phys. Lett. - 2018. - V. 44. - No. 5. - P. 41-48.
Zavershinsky D.I. and Molevich N.E. // Tech. Phys. Lett. - 2014. - V. 40. - P. 701.
Krasnobaev K.V. et al. // Astron. Lett. - 2016. - V. 42. - Iss. 7. - P. 460-473.
Zavershinsky D.I. and Molevich N.E. // Astrophys. Space Sci. - 2015. - V. 358. - P. 22.
Chin R., Verwichte R., et al. // Phys. Plasmas. - 2010. - V. 17. - No. 3. - P. 032107 (1-12).
Molevich N.E., Zavershinskiy D.I., and Ryashchikov D.S. // Magnetohydrodynamics. - 2016. - V. 52. - 199.
Nakariakov V.M. et al. // Astrophys. J. - 2000. - V. 528. - Iss. 2. - P. 767-775.
Molevich N.E., Zavershinskiy D.I., and Ryashchikov D.S. // Magnetohydrodynamics. - 2016. - V. 52. - P. 191.
Molevich N.E., Zavershinsky D.I., Galimov R.N., and Makaryan V.G // Astrophys. Space Sci. - 2011. - V. 334. - P. 35.
Zavershinsky D.I. and Molevich N.E. // Tech. Phys. Lett. - 2013. - V. 39. - P. 676.
Field G.B. // Astrophys. J. - 1965. - V. 142. - P. 531-567.
McIntosh S.W., de Pontieu B., Carlsson M., et al. // Nature. - 2011. - V. 475. - Р. 477.
Wentzel D. G. // Solar Phys. - 1974. - V. 39. - P. 129-140.
