Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1041...63t&link_type=abstract
MULTIFACETS OF DUSTRY PLASMAS: Fifth International Conference on the Physics of Dusty Plasmas. AIP Conference Proceedings, Volu
Physics
Dusty Or Complex Plasmas, Plasma Crystals, Plasma Dynamics And Flow, Plasma Heating By Radio-Frequency Fields, Icr, Icp, Helicons, Fusion Products Effects, Fast Particle Effects, Plasma Properties, Plasma Sources, Waves, Oscillations, And Instabilities In Plasmas And Intense Beams
Scientific paper
The co-existence between charged micron-size particulates of matter and plasma electrons and ions can lead to interesting physics phenomena. Some of the most spectacular observations in laboratory low ionized gases include the formation of aligned dust structures, the propagation of dust waves or self-organization leading to dust voids. Here, the dust dynamics is established by the forces of gravity, of electrostatic interaction with electric fields within the plasma, of friction with the neutral gas, and by the Coulomb repulsion between grains. Measurements of dust trajectories have been carried out in situ when the plasma density is about 6-7 orders of magnitude higher than in typical laboratory dusty plasmas, i.e. ~1022 m-3, and the ion temperature is a few eV. The plasma flows at speeds of the order of 20-60 km/s. Two observed features characterize dust in this new plasma regime: the plasma drag force dominates over all other forces acting on the grains and the microparticles are heated to temperatures sufficiently high, to become self-illuminated. Simultaneous observation at different moments in time of up to a few hundred flying dust grains has been possible due to the timing capabilities of a high-speed camera equipped with a telephoto lens. Dust speed of a few km/s and accelerations of ~105-106 m/s2 have been inferred using the time-of-flight technique. Among the applications of hypervelocity dust are local diagnostics performed on hot plasmas, interstellar propulsion or simulation of meteorite impacts.
Ticoş Cătălin M.
Wang Zhehui
Wurden Glen. A.
No associations
LandOfFree
A New Parameter Regime for Dust in Plasma: the Case of Dense and Supersonic Plasma Flows does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A New Parameter Regime for Dust in Plasma: the Case of Dense and Supersonic Plasma Flows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A New Parameter Regime for Dust in Plasma: the Case of Dense and Supersonic Plasma Flows will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1292350