Abstract

This Rapid Communication deals with the electron-density measurements using the resonance cone phenomenon in a cold magnetized plasma. The collision frequency limits the modulus of the upper hybrid resonance cone peak and shifts it. Theoretically, this effect is slight and should not affect the electron-density measurements done with this method in magnetized plasmas. The experiment reported in this paper shows that the phenomenological collision frequency introduced in the theoretical potential is much higher than expected on the basis of electron-ion and electron-neutral collisions, so that it is necessary to examine not only the amplitude of the signal but also its phase, in order to estimate this phenomenological frequency and thus the correction to bring about the electron density.

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