Dual-frequency modes of the dust acoustic surface wave in a semibounded system

Title
Dual-frequency modes of the dust acoustic surface wave in a semibounded system
Authors
이명재
Keywords
ONE-PHOTON ANNIHILATION; INTERSTELLAR-MEDIUM; THERMAL POSITRONS; PLASMA
Issue Date
2015-07
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW E, v. 92, no. 1, Page. 1-6
Abstract
Dual-frequency modes of the dust acoustic surface waves propagating at the interface between a nonmagnetized multicomponent Lorentzian dusty plasma and a vacuum are investigated, including nonthermal and positron effects. The dispersion relation is kinetically derived by employing the specular reflection boundary condition and the dielectric permittivity for dusty plasma containing positrons. We found that there exist two modes of the dust acoustic surface wave; high- and low-frequency modes. We observe that both H and L modes are enhanced by the increase of the pair annihilation rate. However, the effects of positron density are twofold depending on the ratio of annihilated positrons. The effects of nonthermal plasmas are also investigated on the H and L modes of dust acoustic surface waves. We found that the nonthermal plasmas reduce the frequencies of both H and L modes.
URI
https://journals.aps.org/pre/abstract/10.1103/PhysRevE.92.013105http://hdl.handle.net/20.500.11754/26060
ISSN
1539-3755; 1550-2376
DOI
http://dx.doi.org/10.1103/PhysRevE.92.013105
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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