Gundersen, Martin Electrical Engineering Department, University of Southern California, Los Angeles, California.
- Voltage and current characteristics
- Choice of gas
- Thermionic cathode
- Types of tubes
- Related Primary Literature
- Additional Reading
An electron tube, usually a diode (see illustration) or triode, containing a gas. The gas contributes two significant advantages: (1) The plasma, or gas of electrons and ions, that is formed in the gas during conduction allows space-charge effects to be overcome; and (2) the gas acts to reduce power dissipation at electrodes. These factors result in tubes that can conduct high currents and remain in use for long periods. Gas tubes are particularly important for high-power applications. Two important types are the thyratron and the gas-filled rectifier.
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