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ERIC Number: EJ830490
Record Type: Journal
Publication Date: 2007-Jul
Pages: 8
Abstractor: As Provided
Reference Count: 9
ISBN: N/A
ISSN: ISSN-0143-0807
An Experiment on Thermionic Emission: Back to the Good Old Triode
Azooz, A. A.
European Journal of Physics, v28 n4 p635-642 Jul 2007
A simple experiment to study thermionic emission, the Richardson-Dushman equation and the energy distribution function of thermionic electrons emitted from a hot cathode using a triode vacuum tube is described. It is pointed out that such a distribution function is directly proportional to the first derivative of the Edison anode current with respect to the control grid voltage of the triode when the anode voltage is equal to zero. The energy distribution functions obtained are better described by the Fermi-Dirac law than by the Maxwell-Boltzman distribution law. (Contains 1 table and 6 figures.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://www.iop.org/EJ/journal/EJP
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A