Kinetic quasimodes in a plasma double layer.

Nocera L.
  Venerdì 30/09   09:00 - 12:00   Edificio Psicologia 2 - Aula 2B   II - Fisica della materia
We determine the properties of quasimodes in a double layer characterised by a finite-size DC electric field and pressure gradient and hosting 2D electrostatic oscillations, all of which asymptotically vanish away from the double layer. $Ad hoc$ closure applied to the inhomogeneous, anisotropic, collisionless plasma, taking into account the contributions by trapped ions and electrons, gives a Fredholm integral equation for the oscillations' amplitude and a logarithmically singular dispersion function. Roots of this function on its non-physical sheet give the frequencies and collisionless (Landau) damping rates of novel quasimodes propagating at right angle to the DC electric field.