Squeezed state of an electron cloud as a “quasi-neutral” one-component plasma

We present a one-dimensional model, which gives a novel physical interpretation to the specific state of an ensemble of electrons continuously injected into an electrostatic potential well immersed in a strong applied magnetic field preventing radial expansion. When the space-charge field of the ele...

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Veröffentlicht in:Physics of plasmas 2021-07, Vol.28 (7)
Hauptverfasser: Bliokh, Y., Leopold, J. G., Krasik, Ya. E.
Format: Artikel
Sprache:eng
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Zusammenfassung:We present a one-dimensional model, which gives a novel physical interpretation to the specific state of an ensemble of electrons continuously injected into an electrostatic potential well immersed in a strong applied magnetic field preventing radial expansion. When the space-charge field of the electrons accumulated in the potential well compensates the external electrostatic field, a force-free steady-state of the electron cloud forms. This state of equilibrium is known in another context as a squeezed state of an electron beam. It is shown that the spatial distribution of the electron number density in this steady-state correlates with the shape of the potential well. Perturbations of the steady-state propagate along the electron cloud in the form of Trivelpiece–Gould modes.
ISSN:1070-664X
1089-7674
DOI:10.1063/5.0056881