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Instability of higher harmonic electrostatic ion cyclotron waves in a negative ion plasma

Published online by Cambridge University Press:  01 August 2009

M. ROSENBERG  and
R. L. MERLINO
M. ROSENBERG
Affiliation:
Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, CA 92093, USA (rosenber@ecepops.ucsd.edu)
R. L. MERLINO
Affiliation:
Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, USA
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Abstract

We present a kinetic theory analysis of the electrostatic ion cyclotron (EIC) instability in a plasma containing positive ions, electrons, and negative ions that are much more massive than the positive ions. Conditions are investigated for exciting the fundamental and the higher harmonic EIC waves associated with each ion species. We find that as the concentration of heavy negative ions increases, the wave frequencies increase, the unstable spectrum in general shifts to longer perpendicular wavelengths, and the growth of higher harmonic EIC waves tends to increase within certain parameter ranges. Applications to possible laboratory plasmas are discussed.

Type
Papers
Information
Journal of Plasma Physics , Volume 75 , Issue 4 , August 2009 , pp. 495 - 508
Copyright
Copyright © Cambridge University Press 2008

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