Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-26T04:48:42.087Z Has data issue: false hasContentIssue false
  • English
  • Français

The ion-ion acoustic instability

Published online by Cambridge University Press:  13 March 2009

S. Peter Gary  and
Nojan Omidi
S. Peter Gary
Affiliation:
Earth and Space Science Division, Los Alamos National Laboratory, Los Alamos, NM 87545
Nojan Omidi
Affiliation:
Instituts of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90024
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper considers the linear theory of ion-acoustic-like instabilities in a homogeneous Vlasov plasma with two ion components, a less dense beam and a more dense core, with a relative drift velocity. Numerical solutions of the full electrostatic dispersion equation are presented, and the properties of the ion–ion acoustic instability are studied in detail. The following properties are demonstrated: (i) At relatively cold beam temperatures, the instability is fluid-like, but it becomes a beam resonant kinetic instability as the beam temperature becomes of the order of the core temperature; (ii) if the mode is unstable, its threshold lies well below the threshold of the electron–ion acoustic instability; (iii) an electron temperature anisotropy T⊥/T‖e > 1 enhances the instability and (iv) at sufficiently large beam-core relative drift speeds, electron magnetization can either detract from or enhance the instability. If field-aligned ion beams are to drive the ion-acoustic-like enhanced fluctuations observed upstream of the Earth's bow shock, the effective beam temperature must be much smaller than values quoted in the literature.

Type
Research Article
Information
Journal of Plasma Physics , Volume 37 , Issue 1 , February 1987 , pp. 45 - 61
Copyright
Copyright © Cambridge University Press 1987

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

Abas, S. & Gary, S. P. 1971 Plasma Phys. 13, 262.Google Scholar
Akimoto, K. & Omidi, N. 1986 Geophys. Res. Lett. 13, 97.CrossRefGoogle Scholar
Akimoto, K. & Winske, D. 1985 J. Geophys. Res. 90, 12095.CrossRefGoogle Scholar
Anderson, R. R., Parks, G. K., Eastman, T. E., Gurnett, D. A. & Frank, L. A. 1981 J. Geophys. Res. 86, 4493.CrossRefGoogle Scholar
Bergmann, R. 1984 J. Geophys. Res. 89, 953.CrossRefGoogle Scholar
Dusenbery, P. B. & Lyons, L. R. 1985 J. Geophys. Res. 90, 10935.Google Scholar
Feldman, W. C., Asbridge, J. R., Bame, S. J. & Montgomery, M. D. 1973 J. Geophys. Res. 78, 2017.Google Scholar
Formisano, V. & Torbert, R. 1982 Geophys. Res. Lett. 9, 207.Google Scholar
Forslund, D. W. & Shonk, C. R. 1970 Phys. Rev. Lett. 25, 281.CrossRefGoogle Scholar
Fried, B. D. & Gould, R. W. 1961 Phys. Fluids, 4, 139.CrossRefGoogle Scholar
Fried, B. D. & Wong, A. Y. 1966 Phys. Fluids, 9, 1084.CrossRefGoogle Scholar
Fried, B. D. & Wong, A. Y. 1974 Phys. Fluids, 17, 1048.CrossRefGoogle Scholar
Fuselier, S. A. & Gurnett, D. A. 1984 J. Geophys. Res. 89, 91.Google Scholar
Gallagher, D. L. 1985 J. Geophys. Res. 90, 1435.CrossRefGoogle Scholar
Gary, S. P. 1970 J. Plasma Phys. 4, 753.CrossRefGoogle Scholar
Gary, S. P. 1971 J. Plasma Phys. 6, 561.Google Scholar
Gary, S. P. 1978 a J. Geophys. Res. 83, 2504.CrossRefGoogle Scholar
Gary, S. P. 1978 b J. Plasma Phys. 20, 47.CrossRefGoogle Scholar
Gary, S. P., Smith, G. W., Lee, M. A., Goldstein, M. L. & Forslund, D. W. 1984 Phys. Fluids, 27, 1852; Erratum 1985 Phys. Fluids, 28, 438.CrossRefGoogle Scholar
Grabbe, C. L. 1985 Geophys. Res. Lett. 12, 483.CrossRefGoogle Scholar
Grabbe, C. L. & Eastman, T. E. 1984 J. Geophys. Res. 89, 3865.Google Scholar
Gresillon, D., Doveil, F. & Buzzi, J. M. 1975 Phys. Rev. Lett. 34, 197.Google Scholar
Gurnett, D. A. & Frank, L. A. 1978 J. Geophys. Res. 83, 58.CrossRefGoogle Scholar
Gurnett, D. A., Marsch, E., Pilipp, W., Schwenn, R. & Rosenbauer, H. 1979 a J. Geophys. Res. 84, 2029.CrossRefGoogle Scholar
Gurnett, D. A., Neubauer, F. M. & Schwenn, R. 1979 b J. Geophys. Res. 84, 541.CrossRefGoogle Scholar
Gurnett, D. A., Kurth, W. S. & Scarf, F. L. 1981 Science, 212, 235.Google Scholar
Imre, K. & Ozizmir, E. 1974 Phys. Fluids, 17, 1046.CrossRefGoogle Scholar
Kennel, C. F., Scarf, F. L., Coroniti, F. V., Smith, E. J. & Gurnett, D. A. 1982 J. Geophys. Res. 87, 17.CrossRefGoogle Scholar
Kurth, W. S., Gurnett, D. A. & Scarf, F. L. 1979 J. Geophys. Res. 84, 3413.CrossRefGoogle Scholar
Lemons, D. S., Asbridge, J. R., Bame, S. J., Feldman, W. C., Gary, S. P. & Gosling, J. T. 1979 J. Geophys. Res. 84, 2135.CrossRefGoogle Scholar
Marsch, E., Muhlhauser, K.-H., Schwenn, R., Rosenbauer, H., Pilipp, W. & Neubauer, F. M. 1982 J. Geophys. Res. 87, 52.CrossRefGoogle Scholar
Moses, S. L., Coroniti, F. V., Kennel, C. F., Scarf, F. L., Greenstadt, E. W., Kurth, W. S. & Lepping, R. P. 1985 Geophys. Res. Lett. 12, 183.Google Scholar
Omidi, N. 1985 J. Geophys. Res. 90, 12330.CrossRefGoogle Scholar
Paschmann, G., Sckopke, N., Bame, S. J. & Gosling, J. T. 1982 Geophys. Res. Lett. 9, 881.Google Scholar
Rodriguez, P. 1981 J. Geophys. Res. 86, 1279.CrossRefGoogle Scholar
Rodriguez, P. & Gurnett, D. A. 1976 J. Geophys. Res. 81, 2871.CrossRefGoogle Scholar
Scarf, F. L., Fredricks, R. W., Frank, L. A., Russell, C. T., Coleman, P. J. & Neugebauer, M. 1970 J. Geophys. Res. 75, 7316.CrossRefGoogle Scholar
Scarf, F. L., Coroniti, F. V., Kennel, C. F., Fredricks, R. W., Gurnett, D. A. & Smith, E. J. 1984 a Geophys. Res. Lett. 11, 335.CrossRefGoogle Scholar
Scarf, F. L., Coroniti, F. V., Kennel, C. F., Smith, E. J., Slavin, J. A., Tsurutani, B. T., Bame, S. J. & Feldman, W. C. 1984 b Geophys. Res. Lett. 11, 1050.CrossRefGoogle Scholar
Sckopke, N., Paschmann, G., Bame, S. J., Gosling, J. T. & Russell, C. T. 1983 J. Geophys. Res. 88, 6121.Google Scholar
Stix, T. H. 1962 The Theory of Plasma Waves. McGraw-Hill.Google Scholar
Stringer, T. E. 1964 Plasma Phys. 6, 267.Google Scholar
Thomsen, M. F. 1985 Collisionless Shocks in the Heliosphere: Reviews of Current Research (ed. Tsurutani, B. T. and Stone, R. G.), p. 253. Geophysical Monograph 35, American Geophysical Union.CrossRefGoogle Scholar
Tsai, S. T., Tanaka, M., Gaffey, J. D., Da Jornada, E. H. & Wu, C. S. 1984 J. Plasma Phys. 32, 159.CrossRefGoogle Scholar
Winske, D., Tanaka, M., Wu, C. S. & Quest, K. B. 1985 J. Geophys. Res. 90, 123.CrossRefGoogle Scholar
Wu, C. S., Zhou, Y. M., Tsai, S. T., Guo, S. C., Winske, D. & Papadopoulos, K. 1983 Phys. Fluids, 26, 1259.CrossRefGoogle Scholar