Non-neutral plasmas
Single-component or multi-component plasmas in which quasi-neutrality is violated
The strong space charge electric field makes these plasmas behave differently from quasi-neutral plasmas
New waves/instabilities arise, driven by the energy in the electric field
- Diocotron modes: May become unstable in the presence of dissipation, or if ExB shear is large
Some concepts carry over:
- Collective effects such as Debye shielding and plasma oscillations are analogous. Thus, these are real plasmas.
- In rotating frame of reference, B-field gives rise to term acting as neutralizing space charge
General references: R. C. Davidson �Physics of Nonneutral Plasmas� (reissued Dec 2001), papers by O�Neil, Malmberg, Driscoll, etc.