Modified theory of secondary electron emission from spherical particles and its effect on dust charging in complex plasma
- Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi-110016 (India)
- Institute for Plasma Research, Gandhinagar-382428 (India)
- Department of Education Building, University of Lucknow, Lucknow-226007 (India)
The authors have modified Chow's theory of secondary electron emission (SEE) to take account of the fact that the path length of a primary electron in a spherical particle varies between zero to the diameter or x{sub m} the penetration depth depending on the distance of the path from the centre of the particle. Further by including this modified expression for SEE efficiency, the charging kinetics of spherical grains in a Maxwellian plasma has been developed; it is based on charge balance over dust particles and number balance of electrons and ionic species. It is seen that this effect is more pronounced for smaller particles and higher plasma temperatures. Desirable experimental work has also been discussed.
- OSTI ID:
- 22113397
- Journal Information:
- Physics of Plasmas, Vol. 20, Issue 1; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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