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An Experiment on the Velocity Distribution of Thermionic Electrons

  • Autori: Battaglia, OR; Fazio, C; Guastella, I; Mineo RM
  • Anno di pubblicazione: 2010
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • Parole Chiave: Thermionic emission; Maxwell distribution
  • OA Link:


This paper describes an undergraduate experiment that yields the velocity distribution of thermionic electrons by analyzing the I-V characteristics of diodes and triodes. The experiment allows students to focus on the distribution function more than on difficulties arising from the complexity of thermionic emission. By using a simple model, the velocity distribution of thermionic electrons emitted by the vacuum tube cathode can be described by Maxwell’s distribution.