Comparison of the analytical and simulation results of the equilibrium beam profile

Journal Article · Mon Oct 15 04:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2793738· OSTI ID:21062042

Liu, Z J; Shaoping, Zhu; Cao, L H; Zheng, C Y ^[1]

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1. Institute of Applied Physics and Computational Mathematics, P. O. Box 8009, Beijing 100088 (China)

The evolution of high current electron beams in dense plasmas has been investigated by using two-dimensional particle-in-cell (PIC) simulations with immobile ions. It is shown that electron beams are split into many filaments at the beginning due to the Weibel instability, and then different filamentation beams attract each other and coalesce. The profile of the filaments can be described by formulas. Hammer et al. [Phys. Fluids 13, 1831 (1970)] developed a self-consistent relativistic electron beam model that allows the propagation of relativistic electron fluxes in excess of the Alfven-Lawson critical-current limit for a fully neutralized beam. The equilibrium solution has been observed in the simulation results, but the electron distribution function assumed by Hammer et al. is different from the simulation results.

• OSTI ID: 21062042
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 14; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM PROFILES
COMPARATIVE EVALUATIONS
CRITICAL CURRENT
DISTRIBUTION FUNCTIONS
ELECTRON BEAMS
ELECTRONS
EQUILIBRIUM
FILAMENTS
ION MOBILITY
IONS
MATHEMATICAL SOLUTIONS
PLASMA
PLASMA DENSITY
PLASMA INSTABILITY
RELATIVISTIC RANGE
SIMULATION
TWO-DIMENSIONAL CALCULATIONS