(38-4) 06 * <<>> * Russian * English * Content * All Issues

Amplifaction of magnetoacoustic waves in optically thin plasma medium with thermal instability
D.I. Zavershinskiy , N.E.Molevich

 

Samara State Aerospace University
P.N. Lebedev Physical Institute of RAS, Samara Branch

PDF, 197 kB

Full text of article: Russian language.

DOI: 10.18287/0134-2452-2014-38-4-619-622

Pages: 619-622.

Abstract:
Earlier, we demonstrated the possibility of energy transfer from unstable acoustic waves into Alfven waves due to a process of three-wave interaction of collinear waves. In this paper, we briefly discuss cooling mechanisms and possible heating scenarios of an optically thin plasma medium. The upper layers of the solar atmosphere have been chosen as the model medium. By the use of two cooling function models we obtain temperature intervals in which the instability can take place and calculate acoustic increments for all heating scenarios.

Key words:
thermal instability, amplification of acoustic waves, optically thin plasma.

Citation:
Zavershinskiy DI, Molevich NE. Amplifaction of magnetoacoustic waves in optically thin plasma medium with thermal instability. Computer Optics 2014; 38(4): 619-622. DOI: 10.18287/0134-2452-2014-38-4-619-622.

References:

  1. Sunyaev, R.A. Fizika Kosmosa: Malen’kaya enziklopedia. Moscow: “Sovetskaya enziklopedia” Publisher. – 1986. – 783 p. (in Russian)
  2. Soler, R. Stability of thermal modes in cool prominence plasmas / R. Soler, J.L. Ballester, S. Parenti // Astronomy & Astrophysics. – 2012 – Vol. 540 – P. 6
  3. Ibanez, S. Propagation of sound and thermal waves in a plasma with solar abundances / S.M.H. Ibanez, D.N.M. Sanchez// Astrophysical Journal. – 1992 – Vol. 396(2). – P. 717-724
  4. Rosner, R. Dynamics of the quiescent solar corona / R. Rosner, W.H. Tucker, G.S. Vaiana // Astrophysical Journal. – 1978 – Vol. 220 – P. 643
  5. Field, G. B. Thermal instability / G.B. Field // Astrophysical Journal. - 1965. - Vol. 142. - P. 531-567.
  6. Molevich, N.E. Traveling self-sustained structures in interstellar clouds with the isentropic instability / N.E. Molevich, D.I. Zavershinsky, R.N. Galimov, V.G. Makaryan // Astrophysics and Space Science. – 2011. – Vol. 334(1). – P. 35-44.
  7. Zavershinsky, D.I. Magnetoacoustic Autowave Pulse in a Heat-Releasing Ionized Gaseous Medium / D.I. Zavershin­sky, N.E. Molevich // Technical Physics Letters. -2013. – Vol. 39(8). - P. 676–679.
  8. Molevich, N.E. Bulk viscosity in thermodynamically non-equilibrium media / N.E. Molevich, A.N. Oraevskiy // Sov. Phys. JETP. - 1988. - Vol. 94(3). - P. 128-132.
  9. Zavershinsky, D.I. Parametrical interaction of codirectional magnetoacoustic and alfven waves at magnetoacoustic instability / D.I. Zavershinsky, N.E. Molevich// Computer Optics. – 2013. – Vol. 37(7). - P. 410 – 415.
  10. Zavershinsky, D. I. Alfvén wave amplification as a result of nonlinear interaction with a magnetoacoustic wave in an acoustically active conducting medium / D.I. Zavershinsky, N.E. Mo­le­vich // Technical Physics Letters. - 2014. – Vol. 40(8). - P. 701–703
  11. Landi, E. CHIANTI An Atomic Database for Emission Lines. XII. Version 7 of the Database. / E. Landi, G. Del Zanna, P.R. Young, K.P. Dere, H.E. Mason// Astronomy & Astrophysics - 2012. – Vol. 744. - P. 9
  12. Mazzotta, P. Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to NI / P. Mazzotta, G. Mazzitelli, S. Colafran­ces­co, N. Vittorio // Astronomy & Astrophysics -1998. – Vol. 133. - P. 403-409
  13. Vesecky, J.F. Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to I / J.F. Vesecky, S.K. Antiochos, J.H. Un­der­wood // Astronomy & Astrophysics - 1979. – Vol. 233. - P. 987-997
  14. Raymond, J. C. Radiative cooling of a low-density plasma / J.C. Raymond, D.P. Cox, B.W. Smith // Astrophysical Journal - 1976. – Vol. 204. - P. 290-292.

© 2009, IPSI RAS
151, Molodogvardeiskaya str., Samara, 443001, Russia; E-mail:journal@computeroptics.ru; Tel: +7 (846) 242-41-24 (Executive secretary), +7 (846) 332-56-22 (Issuing editor), Fax: +7 (846) 332-56-20