Circularly polarized Alfvén and ion cyclotron waves in space plasmas

Details Circularly polarized Alfvén and ion cyclotron waves in space plasmas Circularly polarized Alfvén and ion cyclotron waves in space plasmas

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phst...60..144g&link_type=abstract

Physica Scripta, Volume 60, Issue , pp. 144-159 (1995).

Physics

10

Scientific paper

The linear and nonlinear theory of circularly-polarized Alfvén and ion-cyclotron waves in multicomponent plasmas is reviewed. It is shown that minor heavy-ion components play an important role in the dispersive properties of space plasmas. In the nonlinear theory, the presence of minor heavy-ion components leads to a number of new wave couplings which in turn, can lead to new instabilities. These instabilities are of various kinds: modulational, beat wave and decay instabilities. It is shown that the new instabilities can be very efficient in the energy transfer from the pump wave to the heavy-ion species. This can occur through the Landau damping of electro-acoustic daughter waves, and/or resonance absorption of sideband waves. These processes can help us to understand a number of properties observed in high-speed solar wind streams and in the magnetosphere.

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