volume | PIER Journals

Abstract

Electromagnetic ion cyclotron (EMIC) waves have been studied in the presence of AC electric field perpendicular to ambient magnetic field in the ionosphere with observed superthermal electrons. The presence of 4 eV-50 eV superthermal electrons have been recently seen by Indian SROSS-C2 satellite, Lorentzian Kappa distribution has been used to derive dispersion relation and growth rate using method of characteristics and kinetic approach. The free energy source like anisotropy in temperature, AC electric field and presence of superthermal electrons affect the growth rate. Lorentzian kappa distribution plays important role in giving the wide spectrum range of emitted frequencies.

1. Dusenbury, P. B. and L. R. Lyons, The Physics of Auroral Arc Formation, 456, AGU Pub., Washington D.C., 1981.

2. Keating, J. G., F. J. Mullingan, D. B. Doyle, K. J. Winser, and M. Lockwood, "A statistical study of large field-aligned flows of thermal ions at high latitudes," Planet Space Sci., Vol. 38, 1187, 1990.
doi:10.1016/0032-0633(90)90026-M Google Scholar

3. Wahlund, J. E. and H. J. Openoorth, "Eiscat observations of strong ion outflows from F-region ionosphere during auroral activity: Preliminary results," Geophysics. Res. Lett., Vol. 16, 727, 1989.
doi:10.1029/GL016i007p00727 Google Scholar

4. Yeh, H. C. and J. C. Foster, "Storm tide heavy ion out flow at mid-latitude," J. Geophysics. Res., Vol. 95, 7881, 1990.
doi:10.1029/JA095iA06p07881 Google Scholar

5. Bearing, E. A., M. C. Kelley, and F. S. Mozer, J. Geophysics. Res., Vol. 80, 4612, 1975.
doi:10.1029/JA080i034p04612 Google Scholar

6. Kelley, M. C., E. A. Bering, and F. S. Mozer, Phys. Fluids, Vol. 18, 1950, 1975. Google Scholar

7. Kintner, P. M., C. Micheal, and M. C. Kelley, J. Geophysics. Res, Vol. 88, 375, 1983. Google Scholar

8. Andersion, B. J., K. Takahashi, R. E. Erlandsion, and L. J. Zanetti, "PC 1 pulsations observed by AMPTE/CCE in the earths outer magnetosphere ," Geophysics. Res. Lett., Vol. 17, No. 11, 1983, 1990. Google Scholar

9. Kennel, C. F. and H. E. Petchek, "Limit on stably trapped particle fluxes," J. Geophysics. Res., Vol. 71, No. 1, 1966. Google Scholar

10. Ludlow, G. R., "Growth of obliquely propagating ion-cyclotron waves in the magnetosphere," J. Geophysics. Res., Vol. 94, 15385, 1989.
doi:10.1029/JA094iA11p15385 Google Scholar

11. Ishida, I., S. Kokubun, and R. L. M. Pherron, "Sub storm effects on spectral structures of PC-1 waves at synchronous orbit," J. Geophysics. Res., Vol. 92, 143, 1987.
doi:10.1029/JA092iA01p00143 Google Scholar

12. Wandzura, S. and F. V. Coroniti, "Non convective ion-cyclotron instability," Planet Space Sci., Vol. 23, 123, 1975.
doi:10.1016/0032-0633(75)90073-2 Google Scholar

13. Roux, A., S. Perrant, J. L. Rauch, C. Devilledary, G. Kremser, A. Korth, and D. T. Young, "Wave-interactions near Ω⁺_He observed on board GEOS-1 and 2, Generation of ion cyclotron waves and heating of He⁺ ions," J. Geophysics. Res., Vol. 87, 8174, 1982.
doi:10.1029/JA087iA10p08174 Google Scholar

14. Horne, R. B. and R. M. Thorne, "On the preferred source location for convective amplification of ion-cyclotron waves," J. Geophysics. Res., Vol. 98, 9233, 1993.
doi:10.1029/92JA02972 Google Scholar

15. Loto'aniu, T. M., R. M. Thorne, and B. J. Fraser, "Estimating relativistic electron pitch angle scattering rates using properties of the electromagnetic ion cyclotron wave spectrum ," J. Geophy. Res., Vol. 111, 11452, 2006. Google Scholar

16. Wygant, J. R., M. Bensadoum, and F. S. Mozer, "Electric field measurements at subcritical oblique bow shock crossings," J. Geophysics. Res., Vol. 92, 17109, 1987. Google Scholar

17. Lindqvist, P. A. and F. S. Mozer, "The average tangential electric field at the noon magnetopause," J. Geophysics. Res., Vol. 17, 137, 1990. Google Scholar

18. Perrant, S., R. Gendrin, P. Robert, A. Roux, C. Devilledary, and D. Jones, "ULF waves observed with magnetic and electric sensors on GEOS-1 ," Space Sci. Rev., Vol. 22, 347, 1978. Google Scholar

19. Heppner, J. P., N. C. Maynard, and T. L. Aggson, "Early results from ISEE-1 electric field measurements ," Space Science Rev., Vol. 22, 777, 1978. Google Scholar

20. Mozer, F. S., R. B. Torbert, U. V. Fahleson, C. G. Falthammar, A. Gonfalone, A. Pedersen, and C. T. Russel, "Electric field measurement in the solar wind bow shock, magnetosheath, magnetopause and magnetosphere," Space Sci. Rev., Vol. 22, 791, 1978. Google Scholar

21. Tiwari, M. S. and G. Rostoker, "Field aligned currents and auroral acceleration by non-linear MHD waves," Planet Space Sci., Vol. 32, 1497, 1984.
doi:10.1016/0032-0633(84)90016-3 Google Scholar

22. Pandey, R. S., R. P. Pandey, A. K. Srivastava, and K. Dubey, "Analytical study of whistler mode instability with parallel a.c. field by Lorentzian kappa ," Indian Journal of Radio & Space Physics, Vol. 34, 98-105, 2005. Google Scholar

Dr. Rama Pandey

Dr. R. Pandey

Dr. Ajay K. Srivastava

Dr. S. Karim

Dr. Anonymous Hariom