Workshop on Non - neutral Plasmas ∗

Collisional transport in non-neutral plasmas*

Several recent experiments have measured collisional transport in non-neutral plasmas ~heat conduction, test particle diffusion, and viscosity! that is from 10 to 10 times larger than predicted by classical theory. New guiding center theories of collisional transport have been developed that agree with the measurements. The experiments operate in the guiding center regime rc!lD , where rc is th...

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...

A method for obtaining three-dimensional computational equilibrium of non-neutral plasmas using WARP

Computer simulation studies of the stability and transport properties of trapped non-neutral plasmas require the numerical realization of a three-dimensional plasma distribution. This paper presents a new numerical method for obtaining, without an explicit model for physical collisions in the code, a low noise three-dimensional computational equilibrium distribution. This requires both the load...

Neutral argon density profile determination by comparison of spectroscopic measurements and a collisional-radiative model „invited..

Neutral atoms play important roles in non-fully-ionized plasmas. In helicon sources, neutral pumping and neutral damping of waves are poorly understood. Measurement of the spatial distribution of neutral atoms is possible with spectroscopic diagnostics such as laser-induced fluorescence LIF and passive emission spectroscopy. However, these measurements typically apply to an excited neutral atom...

Computing the m=1 diocotron frequency via an equilibrium calculation in non-neutral plasmas