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.
Battaglia, O.R., Fazio, C., Guastella, I., Mineo RM (2010). An Experiment on the Velocity Distribution of Thermionic Electrons. AMERICAN JOURNAL OF PHYSICS, 78(12), 1302-1308 [10.1119/1.3471937].
An Experiment on the Velocity Distribution of Thermionic Electrons
BATTAGLIA, Onofrio Rosario;FAZIO, Claudio;GUASTELLA, Ivan;MINEO, Rosa Maria
2010-01-01
Abstract
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.
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