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In the Knudsen mode of a plasma diode, a dynamic potential barrier for ions can be formed during nonlinear oscillations occurring within the inter-electrode gap. We found that the barrier… Click to show full abstract
In the Knudsen mode of a plasma diode, a dynamic potential barrier for ions can be formed during nonlinear oscillations occurring within the inter-electrode gap. We found that the barrier oscillations lead to the appearance of long-lived ions in the plasma. A simple model of the oscillating electric field is proposed, which allowed us to find out the reason for the appearance of such ions. The properties of long-lived ions, as well as a structure of the regions on the phase plane where these ions exist, are studied. The analytical results obtained using the model are in good agreement with the numerical simulation data.
Journal Title: Physics of Plasmas
Year Published: 2021
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