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A new mechanism is proposed for an electrostatic ion cyclotron oscillation driven by applying an external potential to a small electrode immersed in a magnetized plasma. The mechanism is based on a direct plasma response to the applied potential, which gives rise to a two-dimensional relaxation oscillation in a magnetized plasma. The model of this two-dimensional potential-driven oscillation is well consistent with the measurements.
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Sato et al. (1985) studied this question.
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