Generation, dynamics and coherent structures in RF-generated trapped non-neutral plasmas.

Maero G., Pozzoli R., Romé M., Cavenago M.
  Venerdì 30/09   09:00 - 12:00   Edificio Psicologia 2 - Aula 2B   II - Fisica della materia
In magnetized non-neutral plasmas, features like turbulence and self-organization are observed as a consequence of the Kelvin-Helmholtz instability. The initial conditions and the presence of multiple species significantly affect the plasma dynamics and equilibrium, and therefore the evolution of initially quiescent single-species distributions has generally been investigated. When this condition is violated, for instance when the plasma is generated via residual-gas ionization by an external forcing, the interplay of phenomena occurring over different time scales leads to a much more complicated evolution, characterized by the formation of coherent structures and non-axisymmetric final states showing unexpected robustness properties against usual instabilities.