Structural and Dynamical Properties of Microrod Dusty Plasma in a Uniform DC Discharge under Microgravity
- Joint Institute for High temperatures of RAS, 125412 Moscow, Izhorskaya, 13/19 (Russian Federation)
- Max-Plank-Institut fuer Extraterrestrische Physik, D-85741 Garching (Germany)
In present experiment an ordering and dynamics of monodisperse nylon rods (D = 10 {mu}m, L = 300 {mu}m) in a uniform DC gas discharge plasma under microgravity have been investigated. Ordered rod structures were registered in DC discharge with a rod concentration of 400-8000 cm{sup -3} and a neon pressure range of 20-50 Pa. The structures revealed orientationally ordered hexagonal structures. DC discharge became unstable at rod number density more then 8000 cm{sup -3}. Rod drift velocities in a permanent electric field were measured for the neon pressure range. Dust acoustic instability ({nu}{approx}0.4{+-}0.1 Hz, {lambda}{approx}1.1{+-}0.4 cm, C{sub DAW}{approx}0.5 cm/s) in rod cloud was observed at a neon pressure of 25 Pa and a rod number density of 1500 cm{sup -3}. Using the 'low' frequency approximation of the linearized DAW dispersion relation and the measured rod drift velocity a rod electric charge had been estimated as Z{sub R}{approx}150000e.
- OSTI ID:
- 21251303
- Journal Information:
- AIP Conference Proceedings, Vol. 1041, Issue 1; Conference: 5. international conference on the physics of dusty plasmas, Ponta Degada, Azores (Portugal), 18-23 May 2008; Other Information: DOI: 10.1063/1.2997260; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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