The
5th Complex Plasma Seminar
The fifth Complex Plasma Seminar will be held on Monday, 29th of November, 2004, in Lecture Theatre 4 of the Physics Building at the University of Sydney.
Programme:
11:30-12:30: Professor Umberto de Angelis (Department of Physical Sciences, University of Napoli Federico II, Italy)
"Effects of charging collisions in dusty plasmas"
Abstract:
The kinetic theory of dusty plasmas, which consistently takes into
account the plasma particles collisions with dust and the dust
charge fluctuations, is used to study the dust-dust interaction
potential and the behavior of the non-hamiltonian sub-system
of dust particles.
It is shown that the collisions can appreciably alter the screening length, which can be much smaller than the usual Debye length, and that in some parameter regimes long-range attraction of negatively charged dust particles is possible, due to over screening.
It is shown that the dust-dust collision integral does not conserve the energy, as a consequence of dust charge variations in the interactions, and the dust component is unstable to energy growth, an effect directly related to the mean square dust charge fluctuations.
12:30-14:00: Lunch
14:00-14:15: Steven Barkby
"Stability of Coulomb clusters in a complex plasma"
14:15-14:30: Timothy Olshansky
"Pairing of dust particles in rf discharge sheath"
14:30-14:45: A. Samarian
"Experimental measurement of the wake potential"
14:45-15:30: Discussion
23/11/2004
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