Effective charge of a small absorbing body in highly collisional plasma subject to an external electric field

Journal Article · Tue May 15 00:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2724806· OSTI ID:20976613

Chaudhuri, M; Khrapak, S A; Morfill, G E ^[1]

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1. Max-Planck Institut fuer Extraterrestrische Physik, D-85741 Garching (Germany)

The total force which is the resultant of the electric, ion, and electron drag forces has been calculated for a small absorbing spherical grain immersed in a highly collisional, weakly ionized plasma subject to a weak external electric field. Linear dielectric response formalism has been used and both ion and electron absorption on the grain have been taken into account. It is shown that the total force is always directed along the direction of the electric force. The 'effective' charge of the grain which can be defined as the ratio of the total force to the strength of the electric field is calculated. It is shown that its magnitude is comparable to the magnitude of the actual grain's charge.

• OSTI ID: 20976613
• Journal Information: Physics of Plasmas, Vol. 14, Issue 5; Other Information: DOI: 10.1063/1.2724806; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
COLLISIONAL PLASMA
COLLISIONS
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DRAG
EFFECTIVE CHARGE
ELECTRIC FIELDS
ELECTRONS
IONS
SPHERICAL CONFIGURATION