Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-25T05:06:16.240Z Has data issue: false hasContentIssue false
  • English
  • Français

Lower-hybrid instabilities driven by an ion velocity ring

Published online by Cambridge University Press:  13 March 2009

K. Akimoto ,
K. Papadopoulos  and
D. Winske
K. Akimoto
Affiliation:
Department of Physics and Astronomy, University of Maryland, College Park, MD 20742
K. Papadopoulos
Affiliation:
Department of Physics and Astronomy, University of Maryland, College Park, MD 20742
D. Winske
Affiliation:
Applied Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545
Get access Rights & Permissions [Opens in a new window]

Abstract

The lower-hybrid instabilities in high-beta (ratio of plasma to magnetic pressure) plasmas driven by ring-ion distributions in velocity space are investigated. A dispersion equation including electromagnetic effects is derived. In the low-beta limit, analytic expressions are obtained which illuminate the physical nature of the instabilities. The complete dispersion equation is solved numerically as a function of ring speed and plasma beta for several types of ring distribution. Electromagnetic effects are important for relatively energetic rings even in the low-beta regime, suppressing growth rates and shifting the angle of propagation to more oblique angles. Stabilization by thermal effects is also discussed. Application of these results to the Earth's bow shock, AMPTE, comets and solar flares is suggested.

Type
Research Article
Information
Journal of Plasma Physics , Volume 34 , Issue 3 , December 1985 , pp. 445 - 465
Copyright
Copyright © Cambridge University Press 1985

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Akimoto, K., Papadopoulos, K. & Winske, D. 1985 J. Plasma Phys. 34, 445.CrossRefGoogle Scholar
Alfvén, H. 1954 On the Origin of the Solar System. Oxford University Press.Google Scholar
Anderson, R. R., Parks, G. K., Eastman, T. E., Gurnett, D. A. & Frank, L. A. 1981 J. Geophys. Res. 86, 4493.CrossRefGoogle Scholar
Byers, J. A. & Grewai, M. 1970 Phys. Fluids, 13, 1819.CrossRefGoogle Scholar
Cattell, C. & Hudson, M. 1982 Geophys. Res. Lett. 9, 1167.CrossRefGoogle Scholar
Chang, T. & Coppi, B. 1981 Geophys. Res. Lett. 8, 1253.CrossRefGoogle Scholar
Da Jornada, E. H., Gaffey, J. D. & Winske, D. 1985 Phys. Fluids, 28, 611.CrossRefGoogle Scholar
Dory, R. A., Guest, G. E. & Harris, E. G. 1965 Phys. Rev. Lett. 14, 131.CrossRefGoogle Scholar
Formisano, V., Galeev, A. A. & Sagdeev, R. Z. 1982 Planet. Space Sci. 30, 491.CrossRefGoogle Scholar
Fredricks, R. W., Crook, G. M., Kennel, C. F., Green, I. M., Scarf, F. L., Colman, P. J. & Russell, C. T. 1970 J. Geophys. Res. 75, 3751.CrossRefGoogle Scholar
Gorney, P. J., Clarke, A., Croley, D., Fennell, J., Luhmann, J. & Mizera, P. 1981 J. Geophys. Res. 86, 83.CrossRefGoogle Scholar
Gosling, J. T., Thomsen, M. F., Bame, S. J., Feldman, W. C., Paschmann, G. & Sckopke, N. 1982 Geophys. Res. Lett. 9, 1333.CrossRefGoogle Scholar
Hall, L. S. & Heckrotte, W. 1966 Proceedings of 7th International Conference on Phenomena in lonized Gases, Beograd.Google Scholar
Hsia, J. B., Chiu, S. M., Hsia, M. F., Chou, R. L. & Wu, C. S. 1979 Phys. Fluids, 22, 1737.CrossRefGoogle Scholar
Klumpar, D. M. 1979 J. Geophys. Res. 84, 4229.CrossRefGoogle Scholar
Lee, J. K. & Birdsall, C. K. 1979 Phys. Fluids, 22, 1306, 1315.CrossRefGoogle Scholar
Leroy, M. M., Winske, D., Goodrich, C. C., Wu, C. S. & Papadopoulos, K. 1982 J. Geophys. Res. 87, 5081.CrossRefGoogle Scholar
Lysak, R. L., Hudson, M. K. & Temerin, M. K. 1980 J. Geophys. Res. 85, 687.Google Scholar
Mizera, P. & Fennell, J. 1977 Geophys. Res. Lett. 4, 311.CrossRefGoogle Scholar
Mynick, H. F., Gerver, M. J. & Birdsall, C. K. 1977 Phys. Fluide, 20, 606.CrossRefGoogle Scholar
O'Neil, T. M. & Malmberg, J. H. 1968 Phys. Fluids, 11, 1754.CrossRefGoogle Scholar
Paschmann, G., Sckopke, N., Bame, S. J. & Gosling, J. T. 1982 Geophys. Res. Lett. 9, 881.Google Scholar
Rodriguez, P. & Gurnett, D. A. 1975 J. Geophys. Res. 80, 19.CrossRefGoogle Scholar
Rodhiguez, P. & Gurnett, D. A. 1976 J. Geophys. Res. 81, 2871.CrossRefGoogle Scholar
Roth, I. & Hudson, M. 1983 J. Geophys. Res. 88, 483.CrossRefGoogle Scholar
Seiler, S., Yamada, M. & Ikezi, H. 1976 Phys. Rev. Lett. 37, 700.CrossRefGoogle Scholar
Sharp, R. D., Johnson, R. G. & Shelley, E. G. 1977 J. Geophys. Res. 82, 3324.CrossRefGoogle Scholar
Sprangle, P., Vomvoridis, J. L. & Manheimer, W. M. 1981 Appl. Phys. Lett. 38, 310.CrossRefGoogle Scholar
Tanaka, M. & Papadopoulos, K. 1983 Phys. Fluids, 26, 1697.CrossRefGoogle Scholar
Tataronis, A. & Crawford, F. 1970 J. Plasma Phys. 4, 231.CrossRefGoogle Scholar
Tsurutani, B. T. & Rodbiguez, P. 1981 J. Geophys. Res. 86, 4319.Google Scholar
Ungstrup, E., Klumpar, D. M. & Heikkila, W. J. 1979 J. Geophys. Res. 84, 4289.CrossRefGoogle Scholar
Winske, D. & Leroy, M. M. 1984 J. Geophys. Res. 89, 2673.CrossRefGoogle Scholar
Wu, C. S., Gaffey, J. D. & Liberman, B. 1981 J. Plasma Phys. 25, 391.CrossRefGoogle Scholar
Wu, C. S., Zhou, Y. M., Tasi, S. T., Guo, S. C., Winske, D. & Papadopoulos, K. 1983 Phys. Fluids, 26, 1259.CrossRefGoogle Scholar
Wu, C. S., Winske, D., Zhou, Y. M., Tsai, S. T., Rodriguez, P., Tanaka, M., Papadopoulos, K., Akimoto, K., Lin, C. S., Leroy, M. and Goodrich, C. C. 1984 Space Sci. Rev. 37, 63.CrossRefGoogle Scholar
Yamada, M. & Seiler, W. 1977 Phys. Rev. Lett. 39, 808.CrossRefGoogle Scholar