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Multiple Floating Potentials of an Electron Emitting Electrode that Terminates a Bounded Plasma System with Hot Electrons

A fully kinetic one‐dimensional model of current collection by an electron emitting collector that limits a bounded plasma system that has been presented earlier [T. Gyergyek, M. Čerček, Czech J. Phys., 54, 431 (2004)] is further developed. Non‐zero drift velocities are included into the distribution functions of the hot and of the emitted electrons. Even relatively small drift velocities have large impact on the current collected by the collector. In the case of space charge limited electron emission from the collector the model predicts a triple floating potential of the collector for certain plasma parameters. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)