Langmuir Probe Method for a Plasma Having Small Amplitude Oscillations

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Abstract
Langmuir probe characteristics for a plasma having oscillations of space potential, electron density and electron temperature are discussed in detail. The method to derive amplitudes of oscillation as well as values of d.c. component of them in the case of the ideal plane probe are introduced. In order to get informations about oscillating components, “method of constant current probe” developed by Barnes and Eros is applied with some extention. The newly developed method to determine the amplitude of oscillation of the electron temperature seems to be useful because of its improved accuracy.

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