Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-27T14:32:27.775Z Has data issue: false hasContentIssue false
  • English
  • Français

Interaction of positive and negative energy waves in a magnetized bi-ion plasma with differential ion streaming

Published online by Cambridge University Press:  01 June 2008

J. F. MCKENZIE  and
Q. HU
J. F. MCKENZIE
Affiliation:
Schools of Physics and Mathematical Sciences, University of KwaZulu-Natal, South Africa Institute of Geophysics and Planetary Physics, University of California, Riverside, CA, 92521USA ([email protected])
Q. HU
Affiliation:
Institute of Geophysics and Planetary Physics, University of California, Riverside, CA, 92521USA ([email protected])
Get access Rights & Permissions [Opens in a new window]

Abstract

In this paper the concept of negative energy waves facilitates the analysis of instability in a magnetized bi-ion plasma with differential ion streaming. There are three frequency regimes in which instability may arise. For frequencies less than the alpha particle gyrofrequency, a negative energy alpha ion-cyclotron mode can interact with a positive energy proton-cyclotron mode. In the intermediate frequency regime lying between the alpha and proton gyrofrequencies, a negative energy alpha-acoustic mode interacts with a positive energy proton-cyclotron mode. In the high-frequency regime above the proton-cyclotron frequency a negative energy alpha-acoustic mode interacts with a positive energy proton-acoustic mode. The resonance (or coalescence) condition which lends itself to a simple geometrical interpretation as the intersection between the proton and alpha mode wave normal diagrams with differential streaming permits the evaluation of the instability growth rate in each frequency regime, which is calculated for both subsonic and supersonic differential streaming.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 3 , June 2008 , pp. 345 - 352
Copyright
Copyright © Cambridge University Press 2007

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

Acheson, D. J. 1976 J. Fluid Mech. 77, 433–472.CrossRefGoogle Scholar
Cairns, R. A. 1979 J. Fluid Mech. 92, 1–14.CrossRefGoogle Scholar
Coppi, B., Rosenbluth, M. N. and Sudan, R. N. 1969 Ann. Phys. 55, 207–247.CrossRefGoogle Scholar
Hollweg, J. V., Esser, R. and Jayati, V. 1993 J. Geophys. Res. 98, 3491.CrossRefGoogle Scholar
Lashmore-Davies, C. N. 2005 J. Plasma Phys. 71, 71–101.CrossRefGoogle Scholar
McKenzie, J. F. 1970 Planet. Space Sci. 18, 18–1.CrossRefGoogle Scholar
McKenzie, J. F. 1994 J. Geophys. Res. 99, 4193.CrossRefGoogle Scholar
McKenzie, J. F., Marsch, E., Baumgartel, K. and Sauer, K. 1993 Ann. Geophys. 11, 341.Google Scholar
Stix, T. H. 1962 The Theory of Plasma Waves. New York: McGraw-Hill.Google Scholar
Walker, A. D. M. 2000a J. Plasma Phys. 63, 203.CrossRefGoogle Scholar
Walker, A. D. M. 2000b Int. J. Geomag. Aeronomy 2, 57.Google Scholar