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A theory of filament lamp's failure statistics

Published online by Cambridge University Press:  18 May 2006

V. J. Menon  and
D. C. Agrawal
V. J. Menon
Affiliation:
Department of Physics, Banaras Hindu University, Varanasi 221005, India
D. C. Agrawal*
Affiliation:
Department of Farm Engineering, Banaras Hindu University, Varanasi 221005, India
*
dca_bhu@yahoo.com
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Abstract

We model the ejection of tungsten atoms from a hot filament by a binomial distribution. A normal approximation is made and the lamp is supposed to fail if the undecayed atomic fraction drops below a critical value. The resulting formula for the lamp survival probability has no free parameter and is shown to be in excellent agreement with the experimental mortality curve.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 34 , Issue 2: 15th International Colloquium on Plasma processes (CIP 2005) , May 2006 , pp. 117 - 121
Copyright
© EDP Sciences, 2006

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References

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