Effects of dust contamination on the transverse dynamics of a magnetized electron plasma

• Main Authors: Romé, M., Cavaliere, F., Maero, G., Cavenago, M., Chen, S., Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang
• Format: Conference Proceeding
• Language: English
• Subjects: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; APPROXIMATIONS; COMPLEXES; COMPUTERIZED SIMULATION; DECOMPOSITION; Dust; DUSTS; Dusty plasmas; Electron plasma; ELECTRONS; FLUIDS; GRAVITATION; Particle in cell technique; PLASMA; PLASMA INSTABILITY; PLASMA SIMULATION; Stability; Surface charge; SURFACES; TRAPS; TWO-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL SYSTEMS
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4923110

Complex (dusty) plasmas are characterized by the presence of a fraction of micrometric or sub-micrometric particles which may collect a surface charge up to the order of a few thousand electron charges. The dusty plasmas studied in the experiments generally satisfy a global neutrality condition. By contrast, we present here the investigation of a magnetized nonneutral plasma, i.e., a plasma with a single sign of charge (e.g. electrons) confined in a Penning-Malmberg trap, contaminated by a dust population. We simulate the two-dimensional transverse dynamics of this multi-component plasma with a particle-in-cell code implementing a mass-less fluid (drift-Poisson) approximation for the electrons and a kinetic description for the dust component (including gravity). Simulations with different initial dust distributions and densities have been performed in order to investigate the influence of the dust on the development of the diocotron instability in the electron plasma. In particular, the early stage of the growth of the diocotron modes has been analyzed by Fourier decomposition.