Theory of ion holes in plasmas with flat-topped electron distributions

Monte Carlo Model of Charge-state Distributions for Electron Cyclotron Resonance Ion Source Plasmas

A computer model for an Electron Cyclotron Resonance Ion Source (ECRIS) plasma is under development that currently incorporates non-Maxwellian distribution functions, multiple atomic species, and ion confinement due to the ambipolar potential that arises from fast electrons. Atomic processes incorporated into the model include multiple ionization and multiple charge-exchange with rate coefficie...

Angular anisotropy of electron energy distributions in inductively coupled plasmas

The noncollisional electron transport that is typical of low-pressure ~,10 mTorr! and low-frequency ~,10 MHz! inductively coupled plasmas ~ICPs! has the potential to produce highly anisotropic angle-dependent electron energy distributions ~AEEDs!. The properties of AEEDs in axially symmetric ICPs were investigated using a Monte Carlo simulation ~MCS! embedded in a two-dimensional plasma equipme...

Modulational instability of dust ion acoustic waves in astrophysical dusty plasmas with non thermal electrons

  Propagation of dust ion acoustic waves in plasmas composed of nonthermal distributed electrons and stationary dust particles is investigated. Nonlinear Schrdinger equation is derived to describe small amplitude waves, using the reduction perturbation technique. Modulation instability of dust ion acoustic waves is analysed for this system. Parametric investigation indicates that growth rate of...

Numerical simulations of electron-ion collisions in UHI plasmas

Relativistic theory for localized electrostatic excitations in degenerate electron-ion plasmas.

A self-consistent relativistic two-fluid model is proposed for electron-ion plasma dynamics. A one-dimensional geometry is adopted. Electrons are treated as a relativistically degenerate fluid, governed by an appropriate equation of state. The ion fluid is also allowed to be relativistic, but is cold, nondegenerate, and subject only to an electrostatic potential. Exact stationary-profile soluti...