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Deformation of Weakly Unstable Density Distribution of Non-Neutral Plasma Stimulated by Resonant Clumps

Daiju FUJITA¹⁾, Yasuhito KIWAMOTO^1,2), Yukihiro SOGA²⁾ and Nobuya HASHIZUME²⁾

1)

Faculty of Integrated Human Studies, Kyoto University

2)

Graduate School of Human and Environmental Studies, Kyoto University

(Received 27 March 2006 / Accepted 20 July 2006 / Published 26 September 2006)

Abstract

Accelerated deformations are observed in the density distribution of a pure electron plasma that is weakly diocotron-unstable when l clumps are introduced along a circle where the rotation frequency advected by the target plasma is close to the phase-rotation frequency of an unstable wave with the mode number of l. When the advection frequency is not close to the phase frequency, the clumps are modified in their orbit by the most unstable wave of the target plasma and bunched azimuthally into the distribution modulated by the wave.

Copyright (c) 2006 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

diocotron instability, non-neutral plasma, resonant clumps, external perturbation

DOI: 10.1585/pfr.1.044

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References

• [1] R.H. Levy, Phys. Fluids 11, 920 (1968).
• [2] A.J. Peurrung and J. Fajans, Phys. Fluids A 5, 493 (1993).
• [3] Y. Kiwamoto, K. Ito, A. Sanpei and A. Mohri, Phys. Rev. Lett. 85, 3173 (2000).
• [4] R.C. Davidson and G.M. Felice, Phys. Plasmas 5 3497 (1998).

This paper may be cited as follows:

Daiju FUJITA, Yasuhito KIWAMOTO, Yukihiro SOGA and Nobuya HASHIZUME, Plasma Fusion Res. 1, 044 (2006).