Speaker
Myoung-Jae Lee
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P5.4001.pdf
Dispersion relations for the symmetric and anti-symmetric Hasegawa
surface waves in a plasma slab containing collisional electrons
and flowing ions
M.-J. Lee1, G. Jung1, Y.-D. Jung3
1
Department of Physics, Hanyang University, Seoul 04763, South Korea
2
Department of Applied Physics and Department of Bionanotechnology, Hanyang
University, Ansan, Kyunggi-Do 15588, South Korea
Surface wave propagation on the interface between plasmas and a vacuum has drawn much
attention because of interests in bounded plasmas and applications in various technical areas
of plasma technologies and sciences. Since the actual plasmas in laboratory and space
plasmas have boundaries and often take the structure of slab or planar geometry, waves
propagating in a slab are of great importance. The slab plasma would support two modes of
surface waves called symmetric and anti-symmetric modes, specified with respect to their
parallel electric field components which are symmetric or antisymmetric with respect to the
slab axis. In this work, the dispersion relations for the symmetric and anti-symmetric modes
of electrostatic Hasegawa surface wave propagating in a cold dusty plasma slab whose
constituents are collisional electrons, collisional streaming ions and dust grains are derived.
We find that there are high- and low-frequency branches for both symmetric and
anti-symmetric modes in the plasma slab. The real frequency of the wave is found to
decrease as the ion collision frequency is increases for both modes. In the case of
low-frequency branch, the phase velocity of the Hasegawa surface wave in a slab is always
faster (slower) than that in a semi-bounded plasma for symmetric mode (anti-symmetric
mode). We also found that the Hasegawa surface waves can be damped by the collisional
dissipation. However, the characteristic of damping is quite different for the two modes: the
magnitude of damping rate for symmetric (anti-symmetric) mode increases (decreases) as the
slab thickness decrease.
