Journal article
Transverse oscillations in a single-layer dusty plasma under microgravity
Physics of plasmas, Vol.16(8), pp.083703-083703-10
08/2009
DOI: 10.1063/1.3204638
Abstract
A single-layer suspension of microparticles was formed in a plasma under microgravity conditions. This single layer is confined at a void boundary by a balance of ion drag and electric forces, where the ion flow velocity is much slower than in the sheath of laboratory plasmas. Using a high-resolution camera that allows measurements of velocities at a low level, the microparticle kinetic temperature was found to be close to that of the neutral gas. The random motion transverse to the single layer was found to have oscillations of the form expected for harmonic oscillators driven by white noise. The driving of the oscillation is mostly attributed to the Brownian motion of neutral atoms, while the damping is mostly due to neutral gas friction. An observed resonance frequency of
25
s
−
1
allows us to quantify the electric and ion drag forces as being in the range of
0.2
–
0.4
m
p
g
, where
m
p
is the microparticle mass and
g
is the acceleration of gravity on Earth’s surface. No signature of wave dispersion was detected for this experiment with neon at a pressure of 0.12 Torr.
Details
- Title: Subtitle
- Transverse oscillations in a single-layer dusty plasma under microgravity
- Creators
- Bin Liu - University of IowaJ Goree - University of IowaV. E Fortov - Russian Academy of SciencesA. M Lipaev - Russian Academy of SciencesV. I Molotkov - Russian Academy of SciencesO. F Petrov - Russian Academy of SciencesG. E Morfill - Max Planck SocietyH. M Thomas - Max Planck SocietyH Rothermel - Max Planck SocietyA. V Ivlev - Max Planck Society
- Resource Type
- Journal article
- Publication Details
- Physics of plasmas, Vol.16(8), pp.083703-083703-10
- DOI
- 10.1063/1.3204638
- ISSN
- 1070-664X
- eISSN
- 1089-7674
- Number of pages
- 10
- Grant note
- 08-02-00444 / RFBR 06-02-08100 / RFBR
- Language
- English
- Date published
- 08/2009
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984199785702771
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