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https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00005438
2023-01-16T03:49:56Z
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Dynamic behaviors of dust particles in the plasma–sheath boundary
Takamura, S.
Misawa, T.
Ohno, N.
Nunomura, S.
Sawai, M.
Asano, K.
Kaw, P.K.
open access
Copyright (2001) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
A variety of dynamic behaviors in dusty plasmas is expected under the experimental condition of weak friction with gas molecules. The device ‘‘KAGEROU’’ provides such an environment for dynamic collective phenomena. Self-excited dust oscillations in Coulomb crystals have been observed at low values of plasma density and gas pressure. An instability mechanism was identified to be delayed charging in an inhomogeneous equilibrium dust charge in the sheath. The theoretical growth rate was formulated in relation to the destabilization of a transverse dust lattice wave (T-DLW), which was found to be very sensitive to the presence of a small amount of hot electrons which produces a substantial positive equilibrium charge gradient ∇Q_{d-eq} around the equilibrium position of dust particles in the plasma–sheath boundary. The first experimental observation of a correlated self-excited vertical oscillations in a one-dimensional dust chain indicates a destabilization of T-DLW. The experimental condition is very consistent with the parameter area which predicts numerically an instability of T-DLW.
American Institute of Physics
2001-05
eng
journal article
VoR
http://hdl.handle.net/2237/7044
https://nagoya.repo.nii.ac.jp/records/5438
https://doi.org/10.1063/1.1350967
1070-664X
Physics of Plasmas
8
5
1886
1892
https://nagoya.repo.nii.ac.jp/record/5438/files/PhysPlasmas_8_1886.pdf
application/pdf
601.3 kB
2018-02-19