International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Study on Electromagnetic Electron Cyclotron (EMEC) Waves around Plasma-Pause Region

Author Affiliations

  • 1School of Studies in Physics, Vikram Univarsity Ujjain, MP-456 010, INDIA

Res. J. Engineering Sci., Volume 1, Issue (6), Pages 18-21, December,26 (2012)

Abstract

Electromagnetic electron cyclotron (EMEC) waves have been studied for general loss-cone distribution function with temperature anisotropy around plasma-pause region. Electromagnetic electron cyclotron (EMEC) waves have been studied by kinetic approach. The effect of general loss-cone distribution function with temperature anisotropy on EMEC instability is evaluated the dispersion relation, growth rate. The main objective of the present investigation is to examine the effect of general loss-cone distribution index J with temperature anisotropy in view of the plasma-pause region. It is observed that the effect of increasing the distribution index is to increase the growth rate. The results are interpreted for the space plasma parameters appropriate to the plasma-pause region in magneto-plasma.

References

  1. Scharer J.E. and Frivelpiece A.W., Cyclotron wave instabilities in a plasma, Phys. Fluids, 10, 591-595 (1967)
  2. Fredricks R.W., Kennel C.F., Scarf F.L., McGehee J.H. and Coroniti F.V., Plasma instability at (n+1/2) fc and its relationship to some satellite observations, J.Geophys. Res., 75, 6136 (1971)
  3. Young T.S.T., Callen J.D. and McCune J.E., High-frequency electro- static waves in the magnetosphere, J. Geophys. Res.,78, 1082 (1973)
  4. Ashour-Abdalla M., Chanteur G. and Pellat R., A contribution to the theory of the electrostatic half—harmonic electron gyrofrequency waves in the magnetosphere, J. Geophys. Res., 80, 2775 (1975)
  5. Ashour-Abdalla M., Kennel C.F. and Livesey W., A parametric study of electron multiharmonic instabilities in the magnetosphere, J. Geophys. Res., 84, 6540 (1979)
  6. Ashour-Abdalla M. and Kennel C.F., Multiharmonic electron cyclotron instabilities Geophys, Res. Lett., , 711 (1978a)
  7. Ashour-Abdalla M. and Kennel C.F., Nonconvective and convective electron cyclotronharmonic instabilities, J. Geophys. Res.,83, 1531 (1978b)
  8. Ahirwar G. Verma P. and Tiwari M.S., Beam effect on EMIC waves in presence of parallel electric field with different plasma densities by particle aspect approach, Ind. J. of Pure andAppli. Phys., 49, 385 (2011)
  9. Rio L.A. and Galvao R.M.O., Modulation of Whistler waves in nonthermal plasma, Phys. of Plasmas 18, 022311-321 (2011)
  10. Kumar S., Dixit S.K. and Gwal A.K., Effect of upflowing field-aligned electron beams on the electron cyclotron waves in the auroral magnetosphere,Pramana,68, 611-622 (2007)
  11. Ahirwar G. Verma P. and Tiwari M.S., EMIC waves around the plasma-pause region, Planet. Space Sci.,56, 1023-1029 (2008)