Modeling of plasma fibers with radiative processes

Abstract

A fully three dimensional Particle in Cell model of the plasma flber had been developed. The code is written in FORTRAN 95, implementation CVF (Compaq Visual Fortran) under Microsoft Visual Studio user interface. Five particle solvers and two fleld solvers are included in the model. The solvers have relativistic and non{relativistic variants. The model can deal both with periodical and non{periodical boundary conditions. Plasma flber and its surroundings are generated during the initiation process. Many parameters of the flber, such as temperatures of electrons and ions, electric and magnetic flelds, perturbations in the shape of the flber and of the charged particle positions can be in∞uenced by the input dialog. The PIC program package simulates the behavior of the flber, namely the evolution of the magnetic fleld structures and turbulences. The numerical solution of the particle motion and calculation of the electric and magnetic flelds is the core of the program package. There are many additional routines and collaborating program packages for computer diagnostics, graphical output and other calculations such as radiation, collisions with neutrals, etc. The mechanism of the surface turbulences generation in the plasma flber was successfully simulated with the PIC program package. One of the latest goals of the PIC package was clariflcation of the onset of turbulence structures on the plasma flbers surfaces. It was shown that the development of these structures can be caused by initial a radial perturbation of plasma concentration and charge density. The surface structures simulated by PIC package were observed experimentally in various z{pinch apparatuses.