Near-wall layer of a positive dust-electron plasma in the presence of a nonequilibrium charging process

Citation
Ms. Benilov et Pk. Shukla, Near-wall layer of a positive dust-electron plasma in the presence of a nonequilibrium charging process, PHYS PLASMA, 8(9), 2001, pp. 3879-3883
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
8
Issue
9
Year of publication
2001
Pages
3879 - 3883
Database
ISI
SICI code
1070-664X(200109)8:9<3879:NLOAPD>2.0.ZU;2-K
Abstract
Accounting for a nonequilibrium charging process in a positive dust-electro n plasma, a theory is developed for a quasi-neutral layer separating the ne ar-wall space-charge sheath from the bulk plasma where the charging of the dust grains is quasi-equilibrium (i.e., the current of the electrons emitte d by a dust grain is approximately equal to the current of the electrons co llected by the grain). The problem is solvable when the velocity of the dus t particles entering the layer from the quasi-equilibrium plasma satisfies an inequality which is mathematically, although not physically, similar to the Bohm criterion. The obtained results explain the reason for the absence of a continuous transition from the Bohm criterion in a dusty plasma with a variable dust particle charge to the conventional Bohm criterion for an e lectron-ion plasma with constant ion charge. (C) 2001 American Institute of Physics.