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Studies on plasma profiles and its effect on dust charging in hydrogen plasma

Plasma profiles and its influence on dust charging are studied in hydrogen plasma. The plasma is produced in a high vacuum device by a hot cathode discharge method and is confined by a cusped magnetic field cage. A cylindrical Espion advanced Langmuir probe having 0.15 mm diameter and 10.0 mm length...

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Bibliographic Details
Published in:Journal of physics. Conference series 2010-02, Vol.208 (1), p.012139
Main Authors: Kakati, B, Kausik, S S, Saikia, B K, Bandyopadhay, M
Format: Article
Language:English
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Summary:Plasma profiles and its influence on dust charging are studied in hydrogen plasma. The plasma is produced in a high vacuum device by a hot cathode discharge method and is confined by a cusped magnetic field cage. A cylindrical Espion advanced Langmuir probe having 0.15 mm diameter and 10.0 mm length is used to study the plasma parameters for various discharge conditions. Optimum operational discharge parameters in terms of charging of the dust grains are studied. The charge on the surface of the dust particle is calculated from the capacitance model and the current by the dust grains is measured by the combination of a Faraday cup and an electrometer. Unlike our previous experiments in which dust grains were produced in-situ, here a dust dropper is used to drop the dust particles into the plasma.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/208/1/012139